diff --git a/make/jvm/pom.xml b/make/jvm/pom.xml
index 8d1e19f5..49108991 100644
--- a/make/jvm/pom.xml
+++ b/make/jvm/pom.xml
@@ -28,7 +28,7 @@ SOFTWARE.
   <artifactId>jvm</artifactId>
   <version>1.0-SNAPSHOT</version>
   <properties>
-    <eo.version>0.51.3</eo.version>
+    <eo.version>0.51.6</eo.version>
     <stack-size>32M</stack-size>
     <heap-size>2G</heap-size>
   </properties>
diff --git a/objects/org/eolang/bytes.eo b/objects/org/eolang/bytes.eo
index 1dc3f6bf..79e60fb5 100644
--- a/objects/org/eolang/bytes.eo
+++ b/objects/org/eolang/bytes.eo
@@ -24,9 +24,9 @@
 +architect yegor256@gmail.com
 +home https://github.com/objectionary/eo
 +package org.eolang
-+rt jvm org.eolang:eo-runtime:0.51.3
++rt jvm org.eolang:eo-runtime:0.51.6
 +rt node eo2js-runtime:0.0.0
-+version 0.51.3
++version 0.51.6
 
 # The object encapsulates a chain of bytes, adding a few
 # convenient operations to it. Objects like `int`, `string`,
diff --git a/objects/org/eolang/cti.eo b/objects/org/eolang/cti.eo
index b8f21b36..a2f3613e 100644
--- a/objects/org/eolang/cti.eo
+++ b/objects/org/eolang/cti.eo
@@ -23,7 +23,7 @@
 +architect yegor256@gmail.com
 +home https://github.com/objectionary/eo
 +package org.eolang
-+version 0.51.3
++version 0.51.6
 
 # Compile Time Instruction (CTI).
 #
diff --git a/objects/org/eolang/dataized.eo b/objects/org/eolang/dataized.eo
index 650d21a1..55c32b91 100644
--- a/objects/org/eolang/dataized.eo
+++ b/objects/org/eolang/dataized.eo
@@ -23,7 +23,7 @@
 +architect yegor256@gmail.com
 +home https://github.com/objectionary/eo
 +package org.eolang
-+version 0.51.3
++version 0.51.6
 
 # The object dataizes `target`, makes new instance of `bytes` from given data and behaves as result
 # `bytes`.
diff --git a/objects/org/eolang/error.eo b/objects/org/eolang/error.eo
index c3d1cfe3..c3c8351e 100644
--- a/objects/org/eolang/error.eo
+++ b/objects/org/eolang/error.eo
@@ -23,9 +23,9 @@
 +architect yegor256@gmail.com
 +home https://github.com/objectionary/eo
 +package org.eolang
-+rt jvm org.eolang:eo-runtime:0.51.3
++rt jvm org.eolang:eo-runtime:0.51.6
 +rt node eo2js-runtime:0.0.0
-+version 0.51.3
++version 0.51.6
 +unlint unit-test-missing
 
 # This object must be used in order to terminate the program
diff --git a/objects/org/eolang/false.eo b/objects/org/eolang/false.eo
index a7d56dfc..e8415f20 100644
--- a/objects/org/eolang/false.eo
+++ b/objects/org/eolang/false.eo
@@ -23,7 +23,7 @@
 +architect yegor256@gmail.com
 +home https://github.com/objectionary/eo
 +package org.eolang
-+version 0.51.3
++version 0.51.6
 +unlint unit-test-missing
 
 # The object is a FALSE boolean state.
diff --git a/objects/org/eolang/fs/dir.eo b/objects/org/eolang/fs/dir.eo
index 31efc2d5..f5c509b6 100644
--- a/objects/org/eolang/fs/dir.eo
+++ b/objects/org/eolang/fs/dir.eo
@@ -24,9 +24,9 @@
 +architect yegor256@gmail.com
 +home https://github.com/objectionary/eo
 +package org.eolang.fs
-+rt jvm org.eolang:eo-runtime:0.51.3
++rt jvm org.eolang:eo-runtime:0.51.6
 +rt node eo2js-runtime:0.0.0
-+version 0.51.3
++version 0.51.6
 
 # Directory in the file system.
 # Apparently every directory is a file.
diff --git a/objects/org/eolang/fs/file.eo b/objects/org/eolang/fs/file.eo
index 4fbb2bf8..8c4fa55f 100644
--- a/objects/org/eolang/fs/file.eo
+++ b/objects/org/eolang/fs/file.eo
@@ -24,9 +24,9 @@
 +architect yegor256@gmail.com
 +home https://github.com/objectionary/eo
 +package org.eolang.fs
-+rt jvm org.eolang:eo-runtime:0.51.3
++rt jvm org.eolang:eo-runtime:0.51.6
 +rt node eo2js-runtime:0.0.0
-+version 0.51.3
++version 0.51.6
 
 # The file object in the filesystem.
 [path] > file
diff --git a/objects/org/eolang/fs/path.eo b/objects/org/eolang/fs/path.eo
index 783d3871..91c18cde 100644
--- a/objects/org/eolang/fs/path.eo
+++ b/objects/org/eolang/fs/path.eo
@@ -29,7 +29,7 @@
 +architect yegor256@gmail.com
 +home https://github.com/objectionary/eo
 +package org.eolang.fs
-+version 0.51.3
++version 0.51.6
 
 # A `path` represents a path that is hierarchical and composed of a sequence of
 # directory and file name elements separated by a special separator or delimiter.
diff --git a/objects/org/eolang/fs/tmpdir.eo b/objects/org/eolang/fs/tmpdir.eo
index 4656eb67..df01df42 100644
--- a/objects/org/eolang/fs/tmpdir.eo
+++ b/objects/org/eolang/fs/tmpdir.eo
@@ -27,7 +27,7 @@
 +architect yegor256@gmail.com
 +home https://github.com/objectionary/eo
 +package org.eolang.fs
-+version 0.51.3
++version 0.51.6
 
 # Temporary directory.
 # For Unix/MacOS uses the path supplied by the first environment variable
diff --git a/objects/org/eolang/go.eo b/objects/org/eolang/go.eo
index 5d853073..6542ce44 100644
--- a/objects/org/eolang/go.eo
+++ b/objects/org/eolang/go.eo
@@ -23,7 +23,7 @@
 +architect yegor256@gmail.com
 +home https://github.com/objectionary/eo
 +package org.eolang
-+version 0.51.3
++version 0.51.6
 
 # Non-conditional forward and backward jumps.
 # Forward jump instantly returns provided object to `g.forward` without touching
diff --git a/objects/org/eolang/i16.eo b/objects/org/eolang/i16.eo
index 9b922d65..f4196a7f 100644
--- a/objects/org/eolang/i16.eo
+++ b/objects/org/eolang/i16.eo
@@ -24,9 +24,9 @@
 +architect yegor256@gmail.com
 +home https://github.com/objectionary/eo
 +package org.eolang
-+rt jvm org.eolang:eo-runtime:0.51.3
++rt jvm org.eolang:eo-runtime:0.51.6
 +rt node eo2js-runtime:0.0.0
-+version 0.51.3
++version 0.51.6
 
 # The 16 bits signed integer.
 # Here `as-bytes` must be a `bytes` object.
diff --git a/objects/org/eolang/i32.eo b/objects/org/eolang/i32.eo
index 3b634c24..46e92786 100644
--- a/objects/org/eolang/i32.eo
+++ b/objects/org/eolang/i32.eo
@@ -24,9 +24,9 @@
 +architect yegor256@gmail.com
 +home https://github.com/objectionary/eo
 +package org.eolang
-+rt jvm org.eolang:eo-runtime:0.51.3
++rt jvm org.eolang:eo-runtime:0.51.6
 +rt node eo2js-runtime:0.0.0
-+version 0.51.3
++version 0.51.6
 
 # The 32 bits signed integer.
 # Here `as-bytes` must be a `bytes` object.
diff --git a/objects/org/eolang/i64.eo b/objects/org/eolang/i64.eo
index 807cc76c..046349bd 100644
--- a/objects/org/eolang/i64.eo
+++ b/objects/org/eolang/i64.eo
@@ -24,9 +24,9 @@
 +architect yegor256@gmail.com
 +home https://github.com/objectionary/eo
 +package org.eolang
-+rt jvm org.eolang:eo-runtime:0.51.3
++rt jvm org.eolang:eo-runtime:0.51.6
 +rt node eo2js-runtime:0.0.0
-+version 0.51.3
++version 0.51.6
 
 # The 64 bits signed integer.
 # Here `as-bytes` must be a `bytes` object.
diff --git a/objects/org/eolang/io/bytes-as-input.eo b/objects/org/eolang/io/bytes-as-input.eo
index 5d43017c..3e396932 100644
--- a/objects/org/eolang/io/bytes-as-input.eo
+++ b/objects/org/eolang/io/bytes-as-input.eo
@@ -23,7 +23,7 @@
 +architect yegor256@gmail.com
 +home https://github.com/objectionary/eo
 +package org.eolang.io
-+version 0.51.3
++version 0.51.6
 
 # Makes an `input` from bytes.
 # Here `bts` is sequence of bytes or an object that can be dataized
diff --git a/objects/org/eolang/io/console.eo b/objects/org/eolang/io/console.eo
index 2acbaac0..eb882ac7 100644
--- a/objects/org/eolang/io/console.eo
+++ b/objects/org/eolang/io/console.eo
@@ -26,7 +26,7 @@
 +architect yegor256@gmail.com
 +home https://github.com/objectionary/eo
 +package org.eolang.io
-+version 0.51.3
++version 0.51.6
 
 # The `console` object is basic I/O object that allows to
 # interact with operation system console.
diff --git a/objects/org/eolang/io/dead-input.eo b/objects/org/eolang/io/dead-input.eo
index 0a75c877..9ae3528f 100644
--- a/objects/org/eolang/io/dead-input.eo
+++ b/objects/org/eolang/io/dead-input.eo
@@ -23,7 +23,7 @@
 +architect yegor256@gmail.com
 +home https://github.com/objectionary/eo
 +package org.eolang.io
-+version 0.51.3
++version 0.51.6
 
 # Dead input is an input that reads from nowhere and always
 # returns empty sequence of bytes `--`.
diff --git a/objects/org/eolang/io/dead-output.eo b/objects/org/eolang/io/dead-output.eo
index 22c0d574..1a2aa7fa 100644
--- a/objects/org/eolang/io/dead-output.eo
+++ b/objects/org/eolang/io/dead-output.eo
@@ -23,7 +23,7 @@
 +architect yegor256@gmail.com
 +home https://github.com/objectionary/eo
 +package org.eolang.io
-+version 0.51.3
++version 0.51.6
 
 # Dead output is an output that writes to nowhere.
 [] > dead-output
diff --git a/objects/org/eolang/io/input-length.eo b/objects/org/eolang/io/input-length.eo
index 52567399..c19f96b2 100644
--- a/objects/org/eolang/io/input-length.eo
+++ b/objects/org/eolang/io/input-length.eo
@@ -23,7 +23,7 @@
 +architect yegor256@gmail.com
 +home https://github.com/objectionary/eo
 +package org.eolang.io
-+version 0.51.3
++version 0.51.6
 
 # Reads all the bytes from provided `input` and returns its length.
 [input] > input-length
diff --git a/objects/org/eolang/io/malloc-as-output.eo b/objects/org/eolang/io/malloc-as-output.eo
index 7e763d59..bfe1a008 100644
--- a/objects/org/eolang/io/malloc-as-output.eo
+++ b/objects/org/eolang/io/malloc-as-output.eo
@@ -23,7 +23,7 @@
 +architect yegor256@gmail.com
 +home https://github.com/objectionary/eo
 +package org.eolang.io
-+version 0.51.3
++version 0.51.6
 
 # Makes an output from allocated block in memory.
 # Here `allocated` is `malloc.of.allocated` object.
diff --git a/objects/org/eolang/io/stdin.eo b/objects/org/eolang/io/stdin.eo
index 9abb14b0..a00afc74 100644
--- a/objects/org/eolang/io/stdin.eo
+++ b/objects/org/eolang/io/stdin.eo
@@ -25,7 +25,7 @@
 +architect yegor256@gmail.com
 +home https://github.com/objectionary/eo
 +package org.eolang.io
-+version 0.51.3
++version 0.51.6
 +unlint unit-test-missing
 
 # The `stdin` object is a convenient wrapper on `console` object
diff --git a/objects/org/eolang/io/stdout.eo b/objects/org/eolang/io/stdout.eo
index 48ab2de6..59fd9f60 100644
--- a/objects/org/eolang/io/stdout.eo
+++ b/objects/org/eolang/io/stdout.eo
@@ -24,7 +24,7 @@
 +architect yegor256@gmail.com
 +home https://github.com/objectionary/eo
 +package org.eolang.io
-+version 0.51.3
++version 0.51.6
 
 # The `stdout` object is convenient wrapper on `console` object which
 # uses it as output only and allows to print given argument to console as `string`:
diff --git a/objects/org/eolang/io/tee-input.eo b/objects/org/eolang/io/tee-input.eo
index f6c59d32..7544cbe0 100644
--- a/objects/org/eolang/io/tee-input.eo
+++ b/objects/org/eolang/io/tee-input.eo
@@ -23,7 +23,7 @@
 +architect yegor256@gmail.com
 +home https://github.com/objectionary/eo
 +package org.eolang.io
-+version 0.51.3
++version 0.51.6
 
 # Tee input is an input that reads from provided `input`,
 # writes to provided `output` and behaves as provided `input`.
diff --git a/objects/org/eolang/malloc.eo b/objects/org/eolang/malloc.eo
index 7e0376e4..2d971815 100644
--- a/objects/org/eolang/malloc.eo
+++ b/objects/org/eolang/malloc.eo
@@ -23,9 +23,9 @@
 +architect yegor256@gmail.com
 +home https://github.com/objectionary/eo
 +package org.eolang
-+rt jvm org.eolang:eo-runtime:0.51.3
++rt jvm org.eolang:eo-runtime:0.51.6
 +rt node eo2js-runtime:0.0.0
-+version 0.51.3
++version 0.51.6
 
 # The `malloc` object is an abstraction of a storage of data in heap
 # memory. The implementation of `malloc` is platform dependent. It may
diff --git a/objects/org/eolang/math/angle.eo b/objects/org/eolang/math/angle.eo
index 4e8315aa..71cee3cf 100644
--- a/objects/org/eolang/math/angle.eo
+++ b/objects/org/eolang/math/angle.eo
@@ -24,9 +24,9 @@
 +architect yegor256@gmail.com
 +home https://github.com/objectionary/eo
 +package org.eolang.math
-+rt jvm org.eolang:eo-runtime:0.51.3
++rt jvm org.eolang:eo-runtime:0.51.6
 +rt node eo2js-runtime:0.0.0
-+version 0.51.3
++version 0.51.6
 
 # The angle.
 # A measure of how much something is tilted or rotated, measured in degrees or radians.
diff --git a/objects/org/eolang/math/e.eo b/objects/org/eolang/math/e.eo
index fede106f..eaf92855 100644
--- a/objects/org/eolang/math/e.eo
+++ b/objects/org/eolang/math/e.eo
@@ -23,7 +23,7 @@
 +architect yegor256@gmail.com
 +home https://github.com/objectionary/eo
 +package org.eolang.math
-+version 0.51.3
++version 0.51.6
 +unlint unit-test-missing
 
 # The Euler's number.
diff --git a/objects/org/eolang/math/integral.eo b/objects/org/eolang/math/integral.eo
index 297ee8bb..ee86689c 100644
--- a/objects/org/eolang/math/integral.eo
+++ b/objects/org/eolang/math/integral.eo
@@ -23,7 +23,7 @@
 +architect yegor256@gmail.com
 +home https://github.com/objectionary/eo
 +package org.eolang.math
-+version 0.51.3
++version 0.51.6
 
 # Counts integral from `a` to `b`.
 # Here `func` is integration function, `a` is an upper limit,
diff --git a/objects/org/eolang/math/numbers.eo b/objects/org/eolang/math/numbers.eo
index d1513454..fcf952f4 100644
--- a/objects/org/eolang/math/numbers.eo
+++ b/objects/org/eolang/math/numbers.eo
@@ -24,7 +24,7 @@
 +architect yegor256@gmail.com
 +home https://github.com/objectionary/eo
 +package org.eolang.math
-+version 0.51.3
++version 0.51.6
 
 # Sequence of numbers.
 # Here `sequence` must be a `tuple` or any `tuple` decorator of `number` objects.
diff --git a/objects/org/eolang/math/pi.eo b/objects/org/eolang/math/pi.eo
index 1f62f506..ca21497f 100644
--- a/objects/org/eolang/math/pi.eo
+++ b/objects/org/eolang/math/pi.eo
@@ -23,7 +23,7 @@
 +architect yegor256@gmail.com
 +home https://github.com/objectionary/eo
 +package org.eolang.math
-+version 0.51.3
++version 0.51.6
 +unlint unit-test-missing
 
 # Returns an approximate PI number.
diff --git a/objects/org/eolang/math/random.eo b/objects/org/eolang/math/random.eo
index 8f1959a3..15da5bf1 100644
--- a/objects/org/eolang/math/random.eo
+++ b/objects/org/eolang/math/random.eo
@@ -26,7 +26,7 @@
 +architect yegor256@gmail.com
 +home https://github.com/objectionary/eo
 +package org.eolang.math
-+version 0.51.3
++version 0.51.6
 
 # Generates a pseudo-random number.
 [seed] > random
diff --git a/objects/org/eolang/math/real.eo b/objects/org/eolang/math/real.eo
index 1be521ce..6f29bdc7 100644
--- a/objects/org/eolang/math/real.eo
+++ b/objects/org/eolang/math/real.eo
@@ -24,9 +24,9 @@
 +architect yegor256@gmail.com
 +home https://github.com/objectionary/eo
 +package org.eolang.math
-+rt jvm org.eolang:eo-runtime:0.51.3
++rt jvm org.eolang:eo-runtime:0.51.6
 +rt node eo2js-runtime:0.0.0
-+version 0.51.3
++version 0.51.6
 
 # Returns a floating point number.
 [num] > real
diff --git a/objects/org/eolang/nan.eo b/objects/org/eolang/nan.eo
index c50a885c..dbba00fd 100644
--- a/objects/org/eolang/nan.eo
+++ b/objects/org/eolang/nan.eo
@@ -23,7 +23,7 @@
 +architect yegor256@gmail.com
 +home https://github.com/objectionary/eo
 +package org.eolang
-+version 0.51.3
++version 0.51.6
 
 # The `not a number` object is an abstraction
 # for representing undefined or unrepresentable numerical results.
diff --git a/objects/org/eolang/negative-infinity.eo b/objects/org/eolang/negative-infinity.eo
index 248f72ba..5abb1713 100644
--- a/objects/org/eolang/negative-infinity.eo
+++ b/objects/org/eolang/negative-infinity.eo
@@ -23,7 +23,7 @@
 +architect yegor256@gmail.com
 +home https://github.com/objectionary/eo
 +package org.eolang
-+version 0.51.3
++version 0.51.6
 
 # Negative infinity.
 # A special floating-point value representing an unbounded quantity less than all real numbers.
diff --git a/objects/org/eolang/net/socket.eo b/objects/org/eolang/net/socket.eo
index 2f28cf99..8cbabeff 100644
--- a/objects/org/eolang/net/socket.eo
+++ b/objects/org/eolang/net/socket.eo
@@ -27,7 +27,7 @@
 +architect yegor256@gmail.com
 +home https://github.com/objectionary/eo
 +package org.eolang.net
-+version 0.51.3
++version 0.51.6
 +unlint unit-test-missing
 
 # Socket.
diff --git a/objects/org/eolang/number.eo b/objects/org/eolang/number.eo
index 145ada4c..666924bc 100644
--- a/objects/org/eolang/number.eo
+++ b/objects/org/eolang/number.eo
@@ -23,9 +23,9 @@
 +architect yegor256@gmail.com
 +home https://github.com/objectionary/eo
 +package org.eolang
-+rt jvm org.eolang:eo-runtime:0.51.3
++rt jvm org.eolang:eo-runtime:0.51.6
 +rt node eo2js-runtime:0.0.0
-+version 0.51.3
++version 0.51.6
 
 # The `number` object is an abstraction of a 64-bit floating-point
 # number that internally is a chain of eight bytes.
diff --git a/objects/org/eolang/positive-infinity.eo b/objects/org/eolang/positive-infinity.eo
index dfa2c18f..6d374307 100644
--- a/objects/org/eolang/positive-infinity.eo
+++ b/objects/org/eolang/positive-infinity.eo
@@ -23,7 +23,7 @@
 +architect yegor256@gmail.com
 +home https://github.com/objectionary/eo
 +package org.eolang
-+version 0.51.3
++version 0.51.6
 
 # Positive infinity.
 # A special floating-point value representing an unbounded quantity greater than all real numbers.
diff --git a/objects/org/eolang/seq.eo b/objects/org/eolang/seq.eo
index 91760d96..d6ce1cf7 100644
--- a/objects/org/eolang/seq.eo
+++ b/objects/org/eolang/seq.eo
@@ -23,7 +23,7 @@
 +architect yegor256@gmail.com
 +home https://github.com/objectionary/eo
 +package org.eolang
-+version 0.51.3
++version 0.51.6
 
 # Sequence.
 # The object, when being dataized, dataizes all provided
diff --git a/objects/org/eolang/string.eo b/objects/org/eolang/string.eo
index 32536681..304efe41 100644
--- a/objects/org/eolang/string.eo
+++ b/objects/org/eolang/string.eo
@@ -24,7 +24,7 @@
 +architect yegor256@gmail.com
 +home https://github.com/objectionary/eo
 +package org.eolang
-+version 0.51.3
++version 0.51.6
 
 # The `string` object is an abstraction of a text string, which
 # internally is a chain of bytes.
diff --git a/objects/org/eolang/structs/bytes-as-array.eo b/objects/org/eolang/structs/bytes-as-array.eo
index 08761b50..9944cebb 100644
--- a/objects/org/eolang/structs/bytes-as-array.eo
+++ b/objects/org/eolang/structs/bytes-as-array.eo
@@ -23,7 +23,7 @@
 +architect yegor256@gmail.com
 +home https://github.com/objectionary/eo
 +package org.eolang.structs
-+version 0.51.3
++version 0.51.6
 
 # Represents sequence of bytes as array.
 # Here `bts` is `bytes` objects, the return value is `tuple` where
diff --git a/objects/org/eolang/structs/hash-code-of.eo b/objects/org/eolang/structs/hash-code-of.eo
index b166cd21..5491319c 100644
--- a/objects/org/eolang/structs/hash-code-of.eo
+++ b/objects/org/eolang/structs/hash-code-of.eo
@@ -23,7 +23,7 @@
 +architect yegor256@gmail.com
 +home https://github.com/objectionary/eo
 +package org.eolang.structs
-+version 0.51.3
++version 0.51.6
 
 # Hash code - the pseudo-unique float numeric
 # representation of an object.
diff --git a/objects/org/eolang/structs/list.eo b/objects/org/eolang/structs/list.eo
index f3b25244..21d6c75c 100644
--- a/objects/org/eolang/structs/list.eo
+++ b/objects/org/eolang/structs/list.eo
@@ -23,7 +23,7 @@
 +architect yegor256@gmail.com
 +home https://github.com/objectionary/eo
 +package org.eolang.structs
-+version 0.51.3
++version 0.51.6
 
 # List implements based operations on collections like reducing, mapping, filtering, etc.
 # Decorates and extends `tuple`.
diff --git a/objects/org/eolang/structs/map.eo b/objects/org/eolang/structs/map.eo
index 258e272e..dc8f5553 100644
--- a/objects/org/eolang/structs/map.eo
+++ b/objects/org/eolang/structs/map.eo
@@ -26,7 +26,7 @@
 +architect yegor256@gmail.com
 +home https://github.com/objectionary/eo
 +package org.eolang.structs
-+version 0.51.3
++version 0.51.6
 
 # Hash-map.
 # Here `pairs` must be a `tuple` of `map.entry` object.
diff --git a/objects/org/eolang/structs/range-of-ints.eo b/objects/org/eolang/structs/range-of-ints.eo
index 5d5462da..59db7c0b 100644
--- a/objects/org/eolang/structs/range-of-ints.eo
+++ b/objects/org/eolang/structs/range-of-ints.eo
@@ -24,7 +24,7 @@
 +architect yegor256@gmail.com
 +home https://github.com/objectionary/eo
 +package org.eolang.structs
-+version 0.51.3
++version 0.51.6
 
 # Range of integers from `start` to `end` (soft border) with step = 1.
 # Here `start` and `end` must be `int`s. If they're not - an error will
diff --git a/objects/org/eolang/structs/range.eo b/objects/org/eolang/structs/range.eo
index 306a6837..0199c09c 100644
--- a/objects/org/eolang/structs/range.eo
+++ b/objects/org/eolang/structs/range.eo
@@ -24,7 +24,7 @@
 +architect yegor256@gmail.com
 +home https://github.com/objectionary/eo
 +package org.eolang.structs
-+version 0.51.3
++version 0.51.6
 
 # Range - create a `list` containing a range of elements
 # Here `start` must be a abstract object that must have an object `next` to get
diff --git a/objects/org/eolang/structs/set.eo b/objects/org/eolang/structs/set.eo
index ba872999..68824fbf 100644
--- a/objects/org/eolang/structs/set.eo
+++ b/objects/org/eolang/structs/set.eo
@@ -25,7 +25,7 @@
 +architect yegor256@gmail.com
 +home https://github.com/objectionary/eo
 +package org.eolang.structs
-+version 0.51.3
++version 0.51.6
 
 # Set - is an unordered `list` of unique objects.
 [lst] > set
diff --git a/objects/org/eolang/switch.eo b/objects/org/eolang/switch.eo
index e724750e..2fc9d791 100644
--- a/objects/org/eolang/switch.eo
+++ b/objects/org/eolang/switch.eo
@@ -23,7 +23,7 @@
 +architect yegor256@gmail.com
 +home https://github.com/objectionary/eo
 +package org.eolang
-+version 0.51.3
++version 0.51.6
 
 # The object allows to choose right options according to cases conditions.
 # Parameter cases is the array of two dimensional array, which
@@ -43,22 +43,23 @@
 #
 # This object returns value of only first truly statement.
 [cases] > switch
-  cases.length > len!
+  (rec-case cases).self > found
   if. > @
-    len.eq 0
-    error "switch cases are empty"
-    case-at 0
+    cases.length.eq 0
+    error "Switch cases are empty"
+    if.
+      true.eq found.match
+      found.value
+      true
 
-  # Take case by given index.
-  # If case key is true, return case value.
-  # Otherwise take next case.
-  [index] > case-at
-    cases.at index > case
+  [tup] > rec-case
+    (rec-case tup.prev).self > previous
     if. > @
-      index.eq len
-      true
-      if.
-        case.at 0
-        case.at 1
-        case-at
-          index.plus 1
+      and.
+        tup.length.gt 1
+        previous.match
+      previous
+      [] >>
+        $ > self
+        tup.value.prev.value > match!
+        tup.value.value > value
diff --git a/objects/org/eolang/sys/getenv.eo b/objects/org/eolang/sys/getenv.eo
index 766947cd..0373f63a 100644
--- a/objects/org/eolang/sys/getenv.eo
+++ b/objects/org/eolang/sys/getenv.eo
@@ -26,7 +26,7 @@
 +architect yegor256@gmail.com
 +home https://github.com/objectionary/eo
 +package org.eolang.sys
-+version 0.51.3
++version 0.51.6
 +unlint unit-test-missing
 
 # Get environment variable as `string`.
diff --git a/objects/org/eolang/sys/line-separator.eo b/objects/org/eolang/sys/line-separator.eo
index c86ccf36..0f2fd70c 100644
--- a/objects/org/eolang/sys/line-separator.eo
+++ b/objects/org/eolang/sys/line-separator.eo
@@ -24,7 +24,7 @@
 +architect yegor256@gmail.com
 +home https://github.com/objectionary/eo
 +package org.eolang.sys
-+version 0.51.3
++version 0.51.6
 +unlint unit-test-missing
 
 # Returns the system-dependent line separator string.
diff --git a/objects/org/eolang/sys/os.eo b/objects/org/eolang/sys/os.eo
index 795a43be..f982c501 100644
--- a/objects/org/eolang/sys/os.eo
+++ b/objects/org/eolang/sys/os.eo
@@ -24,9 +24,9 @@
 +architect yegor256@gmail.com
 +home https://github.com/objectionary/eo
 +package org.eolang.sys
-+rt jvm org.eolang:eo-runtime:0.51.3
++rt jvm org.eolang:eo-runtime:0.51.6
 +rt node eo2js-runtime:0.0.0
-+version 0.51.3
++version 0.51.6
 
 # Represents the name of the operating system.
 [] > os
diff --git a/objects/org/eolang/sys/posix.eo b/objects/org/eolang/sys/posix.eo
index 61a9aab4..7d97a685 100644
--- a/objects/org/eolang/sys/posix.eo
+++ b/objects/org/eolang/sys/posix.eo
@@ -23,9 +23,9 @@
 +architect yegor256@gmail.com
 +home https://github.com/objectionary/eo
 +package org.eolang.sys
-+rt jvm org.eolang:eo-runtime:0.51.3
++rt jvm org.eolang:eo-runtime:0.51.6
 +rt node eo2js-runtime:0.0.0
-+version 0.51.3
++version 0.51.6
 
 # Makes a Unix syscall by name with POSIX interface.
 # See https://filippo.io/linux-syscall-table/.
diff --git a/objects/org/eolang/sys/win32.eo b/objects/org/eolang/sys/win32.eo
index ead537e6..0542fa25 100644
--- a/objects/org/eolang/sys/win32.eo
+++ b/objects/org/eolang/sys/win32.eo
@@ -23,9 +23,9 @@
 +architect yegor256@gmail.com
 +home https://github.com/objectionary/eo
 +package org.eolang.sys
-+rt jvm org.eolang:eo-runtime:0.51.3
++rt jvm org.eolang:eo-runtime:0.51.6
 +rt node eo2js-runtime:0.0.0
-+version 0.51.3
++version 0.51.6
 +unlint many-free-attributes
 
 # Makes a kernel32.dll function call by name.
diff --git a/objects/org/eolang/true.eo b/objects/org/eolang/true.eo
index 863f13a2..0b74e34a 100644
--- a/objects/org/eolang/true.eo
+++ b/objects/org/eolang/true.eo
@@ -23,7 +23,7 @@
 +architect yegor256@gmail.com
 +home https://github.com/objectionary/eo
 +package org.eolang
-+version 0.51.3
++version 0.51.6
 +unlint unit-test-missing
 
 # The object is a TRUE boolean state.
diff --git a/objects/org/eolang/try.eo b/objects/org/eolang/try.eo
index d740fb2b..3a4fd70c 100644
--- a/objects/org/eolang/try.eo
+++ b/objects/org/eolang/try.eo
@@ -23,9 +23,9 @@
 +architect yegor256@gmail.com
 +home https://github.com/objectionary/eo
 +package org.eolang
-+rt jvm org.eolang:eo-runtime:0.51.3
++rt jvm org.eolang:eo-runtime:0.51.6
 +rt node eo2js-runtime:0.0.0
-+version 0.51.3
++version 0.51.6
 
 # Try, catch and finally. This object helps catch errors created by the
 # `error` object. When being dataized, such objects will crash the problem.
diff --git a/objects/org/eolang/tuple.eo b/objects/org/eolang/tuple.eo
index 01e7326b..4246624b 100644
--- a/objects/org/eolang/tuple.eo
+++ b/objects/org/eolang/tuple.eo
@@ -23,7 +23,7 @@
 +architect yegor256@gmail.com
 +home https://github.com/objectionary/eo
 +package org.eolang
-+version 0.51.3
++version 0.51.6
 
 # Tuple.
 # An ordered, immutable collection of elements.
diff --git a/objects/org/eolang/txt/regex.eo b/objects/org/eolang/txt/regex.eo
index 5379aa80..68a1a793 100644
--- a/objects/org/eolang/txt/regex.eo
+++ b/objects/org/eolang/txt/regex.eo
@@ -23,9 +23,9 @@
 +architect yegor256@gmail.com
 +home https://github.com/objectionary/eo
 +package org.eolang.txt
-+rt jvm org.eolang:eo-runtime:0.51.3
++rt jvm org.eolang:eo-runtime:0.51.6
 +rt node eo2js-runtime:0.0.0
-+version 0.51.3
++version 0.51.6
 
 # Regular expression in Perl format.
 # Here `pattern` is a string pattern.
diff --git a/objects/org/eolang/txt/sprintf.eo b/objects/org/eolang/txt/sprintf.eo
index 6b2eb0ff..f797f52b 100644
--- a/objects/org/eolang/txt/sprintf.eo
+++ b/objects/org/eolang/txt/sprintf.eo
@@ -23,9 +23,9 @@
 +architect yegor256@gmail.com
 +home https://github.com/objectionary/eo
 +package org.eolang.txt
-+rt jvm org.eolang:eo-runtime:0.51.3
++rt jvm org.eolang:eo-runtime:0.51.6
 +rt node eo2js-runtime:0.0.0
-+version 0.51.3
++version 0.51.6
 
 # The sprintf object allows you to format and output text depending
 # on the arguments passed to it.
diff --git a/objects/org/eolang/txt/sscanf.eo b/objects/org/eolang/txt/sscanf.eo
index 5648d498..45477f01 100644
--- a/objects/org/eolang/txt/sscanf.eo
+++ b/objects/org/eolang/txt/sscanf.eo
@@ -23,9 +23,9 @@
 +architect yegor256@gmail.com
 +home https://github.com/objectionary/eo
 +package org.eolang.txt
-+rt jvm org.eolang:eo-runtime:0.51.3
++rt jvm org.eolang:eo-runtime:0.51.6
 +rt node eo2js-runtime:0.0.0
-+version 0.51.3
++version 0.51.6
 
 # Reads formatted input from a string.
 # This object has two free attributes:
diff --git a/objects/org/eolang/txt/text.eo b/objects/org/eolang/txt/text.eo
index 87502912..4b174ef5 100644
--- a/objects/org/eolang/txt/text.eo
+++ b/objects/org/eolang/txt/text.eo
@@ -28,7 +28,7 @@
 +architect yegor256@gmail.com
 +home https://github.com/objectionary/eo
 +package org.eolang.txt
-+version 0.51.3
++version 0.51.6
 
 # Text.
 # A sequence of characters representing words, sentences, or data.
diff --git a/objects/org/eolang/while.eo b/objects/org/eolang/while.eo
index adadece8..fe7c60c5 100644
--- a/objects/org/eolang/while.eo
+++ b/objects/org/eolang/while.eo
@@ -23,7 +23,7 @@
 +architect yegor256@gmail.com
 +home https://github.com/objectionary/eo
 +package org.eolang
-+version 0.51.3
++version 0.51.6
 
 # The `while` object is very similar to a loop with a pre-condition.
 # Here's how you can use it:
diff --git a/tests/org/eolang/bool-tests.eo b/tests/org/eolang/bool-tests.eo
index 53c241c8..be853855 100644
--- a/tests/org/eolang/bool-tests.eo
+++ b/tests/org/eolang/bool-tests.eo
@@ -24,7 +24,7 @@
 +home https://github.com/objectionary/eo
 +tests
 +package org.eolang
-+version 0.51.3
++version 0.51.6
 +unlint sparse-decoration
 
 # This unit test is supposed to check the functionality of the corresponding object.
diff --git a/tests/org/eolang/bytes-tests.eo b/tests/org/eolang/bytes-tests.eo
index aad046c0..583861f2 100644
--- a/tests/org/eolang/bytes-tests.eo
+++ b/tests/org/eolang/bytes-tests.eo
@@ -24,7 +24,7 @@
 +home https://github.com/objectionary/eo
 +tests
 +package org.eolang
-+version 0.51.3
++version 0.51.6
 +unlint sparse-decoration
 
 # This unit test is supposed to check the functionality of the corresponding object.
diff --git a/tests/org/eolang/cti-tests.eo b/tests/org/eolang/cti-tests.eo
index ffafd118..398a772b 100644
--- a/tests/org/eolang/cti-tests.eo
+++ b/tests/org/eolang/cti-tests.eo
@@ -24,7 +24,7 @@
 +home https://github.com/objectionary/eo
 +tests
 +package org.eolang
-+version 0.51.3
++version 0.51.6
 +unlint sparse-decoration
 
 # This unit test is supposed to check the functionality of the corresponding object.
diff --git a/tests/org/eolang/dataized-tests.eo b/tests/org/eolang/dataized-tests.eo
index fb50307a..6cd17a68 100644
--- a/tests/org/eolang/dataized-tests.eo
+++ b/tests/org/eolang/dataized-tests.eo
@@ -24,7 +24,7 @@
 +home https://github.com/objectionary/eo
 +tests
 +package org.eolang
-+version 0.51.3
++version 0.51.6
 +unlint sparse-decoration
 
 # This unit test is supposed to check the functionality of the corresponding object.
diff --git a/tests/org/eolang/fs/dir-tests.eo b/tests/org/eolang/fs/dir-tests.eo
index 048c1ff0..d888dd14 100644
--- a/tests/org/eolang/fs/dir-tests.eo
+++ b/tests/org/eolang/fs/dir-tests.eo
@@ -26,7 +26,7 @@
 +home https://github.com/objectionary/eo
 +tests
 +package org.eolang.fs
-+version 0.51.3
++version 0.51.6
 +unlint sparse-decoration
 
 # This unit test is supposed to check the functionality of the corresponding object.
diff --git a/tests/org/eolang/fs/file-tests.eo b/tests/org/eolang/fs/file-tests.eo
index 6acdd4ba..fbdd97f5 100644
--- a/tests/org/eolang/fs/file-tests.eo
+++ b/tests/org/eolang/fs/file-tests.eo
@@ -29,7 +29,7 @@
 +home https://github.com/objectionary/eo
 +tests
 +package org.eolang.fs
-+version 0.51.3
++version 0.51.6
 +unlint sparse-decoration
 
 # This unit test is supposed to check the functionality of the corresponding object.
diff --git a/tests/org/eolang/fs/path-tests.eo b/tests/org/eolang/fs/path-tests.eo
index f372d61d..d0abe6fb 100644
--- a/tests/org/eolang/fs/path-tests.eo
+++ b/tests/org/eolang/fs/path-tests.eo
@@ -26,7 +26,7 @@
 +home https://github.com/objectionary/eo
 +tests
 +package org.eolang.fs
-+version 0.51.3
++version 0.51.6
 +unlint sparse-decoration
 
 # This unit test is supposed to check the functionality of the corresponding object.
diff --git a/tests/org/eolang/fs/tmpdir-tests.eo b/tests/org/eolang/fs/tmpdir-tests.eo
index c5a77803..940c0914 100644
--- a/tests/org/eolang/fs/tmpdir-tests.eo
+++ b/tests/org/eolang/fs/tmpdir-tests.eo
@@ -25,7 +25,7 @@
 +home https://github.com/objectionary/eo
 +tests
 +package org.eolang.fs
-+version 0.51.3
++version 0.51.6
 +unlint sparse-decoration
 
 # This unit test is supposed to check the functionality of the corresponding object.
diff --git a/tests/org/eolang/go-tests.eo b/tests/org/eolang/go-tests.eo
index a4aa759f..df147cea 100644
--- a/tests/org/eolang/go-tests.eo
+++ b/tests/org/eolang/go-tests.eo
@@ -24,7 +24,7 @@
 +home https://github.com/objectionary/eo
 +tests
 +package org.eolang
-+version 0.51.3
++version 0.51.6
 +unlint sparse-decoration
 
 # This unit test is supposed to check the functionality of the corresponding object.
diff --git a/tests/org/eolang/i16-tests.eo b/tests/org/eolang/i16-tests.eo
index 70d6a05a..dffc5f1a 100644
--- a/tests/org/eolang/i16-tests.eo
+++ b/tests/org/eolang/i16-tests.eo
@@ -24,7 +24,7 @@
 +home https://github.com/objectionary/eo
 +tests
 +package org.eolang
-+version 0.51.3
++version 0.51.6
 +unlint sparse-decoration
 
 # This unit test is supposed to check the functionality of the corresponding object.
diff --git a/tests/org/eolang/i32-tests.eo b/tests/org/eolang/i32-tests.eo
index 17317b14..2bc81e42 100644
--- a/tests/org/eolang/i32-tests.eo
+++ b/tests/org/eolang/i32-tests.eo
@@ -24,7 +24,7 @@
 +home https://github.com/objectionary/eo
 +tests
 +package org.eolang
-+version 0.51.3
++version 0.51.6
 +unlint sparse-decoration
 
 # This unit test is supposed to check the functionality of the corresponding object.
diff --git a/tests/org/eolang/i64-tests.eo b/tests/org/eolang/i64-tests.eo
index bf4d2e1e..30d9c629 100644
--- a/tests/org/eolang/i64-tests.eo
+++ b/tests/org/eolang/i64-tests.eo
@@ -24,7 +24,7 @@
 +home https://github.com/objectionary/eo
 +tests
 +package org.eolang
-+version 0.51.3
++version 0.51.6
 +unlint sparse-decoration
 
 # This unit test is supposed to check the functionality of the corresponding object.
diff --git a/tests/org/eolang/io/bytes-as-input-tests.eo b/tests/org/eolang/io/bytes-as-input-tests.eo
index b4ce712d..a37864e2 100644
--- a/tests/org/eolang/io/bytes-as-input-tests.eo
+++ b/tests/org/eolang/io/bytes-as-input-tests.eo
@@ -25,7 +25,7 @@
 +home https://github.com/objectionary/eo
 +tests
 +package org.eolang.io
-+version 0.51.3
++version 0.51.6
 
 # This unit test is supposed to check the functionality of the corresponding object.
 [] > tests-makes-an-input-from-bytes-and-reads
diff --git a/tests/org/eolang/io/console-tests.eo b/tests/org/eolang/io/console-tests.eo
index d6fdaf73..66256a47 100644
--- a/tests/org/eolang/io/console-tests.eo
+++ b/tests/org/eolang/io/console-tests.eo
@@ -25,7 +25,7 @@
 +home https://github.com/objectionary/eo
 +tests
 +package org.eolang.io
-+version 0.51.3
++version 0.51.6
 +unlint sparse-decoration
 
 # Prints a simple message to the console. We can't validate
diff --git a/tests/org/eolang/io/dead-input-tests.eo b/tests/org/eolang/io/dead-input-tests.eo
index 7140ac80..3be8b782 100644
--- a/tests/org/eolang/io/dead-input-tests.eo
+++ b/tests/org/eolang/io/dead-input-tests.eo
@@ -25,7 +25,7 @@
 +home https://github.com/objectionary/eo
 +tests
 +package org.eolang.io
-+version 0.51.3
++version 0.51.6
 
 # This unit test is supposed to check the functionality of the corresponding object.
 [] > tests-reads-empty-bytes
diff --git a/tests/org/eolang/io/dead-output-tests.eo b/tests/org/eolang/io/dead-output-tests.eo
index af248dc6..8c67d9e7 100644
--- a/tests/org/eolang/io/dead-output-tests.eo
+++ b/tests/org/eolang/io/dead-output-tests.eo
@@ -25,7 +25,7 @@
 +home https://github.com/objectionary/eo
 +tests
 +package org.eolang.io
-+version 0.51.3
++version 0.51.6
 +unlint sparse-decoration
 
 # This unit test is supposed to check the functionality of the corresponding object.
diff --git a/tests/org/eolang/io/input-length-tests.eo b/tests/org/eolang/io/input-length-tests.eo
index 5a5f5032..76ccc76c 100644
--- a/tests/org/eolang/io/input-length-tests.eo
+++ b/tests/org/eolang/io/input-length-tests.eo
@@ -28,7 +28,7 @@
 +home https://github.com/objectionary/eo
 +tests
 +package org.eolang.io
-+version 0.51.3
++version 0.51.6
 +unlint sparse-decoration
 
 # This unit test is supposed to check the functionality of the corresponding object.
diff --git a/tests/org/eolang/io/malloc-as-output-tests.eo b/tests/org/eolang/io/malloc-as-output-tests.eo
index 7269b51f..b28ec876 100644
--- a/tests/org/eolang/io/malloc-as-output-tests.eo
+++ b/tests/org/eolang/io/malloc-as-output-tests.eo
@@ -25,7 +25,7 @@
 +home https://github.com/objectionary/eo
 +tests
 +package org.eolang.io
-+version 0.51.3
++version 0.51.6
 +unlint sparse-decoration
 
 # This unit test is supposed to check the functionality of the corresponding object.
diff --git a/tests/org/eolang/io/stdout-tests.eo b/tests/org/eolang/io/stdout-tests.eo
index c6d7146c..76f9ab30 100644
--- a/tests/org/eolang/io/stdout-tests.eo
+++ b/tests/org/eolang/io/stdout-tests.eo
@@ -25,7 +25,7 @@
 +home https://github.com/objectionary/eo
 +tests
 +package org.eolang.io
-+version 0.51.3
++version 0.51.6
 +unlint sparse-decoration
 
 # Prints a simple message to the console. We can't validate
diff --git a/tests/org/eolang/io/tee-input-tests.eo b/tests/org/eolang/io/tee-input-tests.eo
index e6e9af16..bf5c8a0c 100644
--- a/tests/org/eolang/io/tee-input-tests.eo
+++ b/tests/org/eolang/io/tee-input-tests.eo
@@ -27,7 +27,7 @@
 +home https://github.com/objectionary/eo
 +tests
 +package org.eolang.io
-+version 0.51.3
++version 0.51.6
 +unlint sparse-decoration
 
 # This unit test is supposed to check the functionality of the corresponding object.
diff --git a/tests/org/eolang/malloc-tests.eo b/tests/org/eolang/malloc-tests.eo
index afcc4990..cb64cb84 100644
--- a/tests/org/eolang/malloc-tests.eo
+++ b/tests/org/eolang/malloc-tests.eo
@@ -24,7 +24,7 @@
 +home https://github.com/objectionary/eo
 +tests
 +package org.eolang
-+version 0.51.3
++version 0.51.6
 +unlint sparse-decoration
 
 # This unit test is supposed to check the functionality of the corresponding object.
diff --git a/tests/org/eolang/math/angle-tests.eo b/tests/org/eolang/math/angle-tests.eo
index 1f7f2093..87e62ce3 100644
--- a/tests/org/eolang/math/angle-tests.eo
+++ b/tests/org/eolang/math/angle-tests.eo
@@ -26,7 +26,7 @@
 +home https://github.com/objectionary/eo
 +tests
 +package org.eolang.math
-+version 0.51.3
++version 0.51.6
 +unlint sparse-decoration
 
 # This unit test is supposed to check the functionality of the corresponding object.
diff --git a/tests/org/eolang/math/integral-tests.eo b/tests/org/eolang/math/integral-tests.eo
index 818af477..81ecd80d 100644
--- a/tests/org/eolang/math/integral-tests.eo
+++ b/tests/org/eolang/math/integral-tests.eo
@@ -25,7 +25,7 @@
 +home https://github.com/objectionary/eo
 +tests
 +package org.eolang.math
-+version 0.51.3
++version 0.51.6
 +unlint sparse-decoration
 
 # This unit test is supposed to check the functionality of the corresponding object.
diff --git a/tests/org/eolang/math/numbers-tests.eo b/tests/org/eolang/math/numbers-tests.eo
index 0ac1d1f6..62776422 100644
--- a/tests/org/eolang/math/numbers-tests.eo
+++ b/tests/org/eolang/math/numbers-tests.eo
@@ -25,7 +25,7 @@
 +home https://github.com/objectionary/eo
 +tests
 +package org.eolang.math
-+version 0.51.3
++version 0.51.6
 +unlint sparse-decoration
 
 # This unit test is supposed to check the functionality of the corresponding object.
diff --git a/tests/org/eolang/math/random-tests.eo b/tests/org/eolang/math/random-tests.eo
index 97116387..410b09e1 100644
--- a/tests/org/eolang/math/random-tests.eo
+++ b/tests/org/eolang/math/random-tests.eo
@@ -25,7 +25,7 @@
 +home https://github.com/objectionary/eo
 +tests
 +package org.eolang.math
-+version 0.51.3
++version 0.51.6
 +unlint sparse-decoration
 
 # This unit test is supposed to check the functionality of the corresponding object.
diff --git a/tests/org/eolang/math/real-tests.eo b/tests/org/eolang/math/real-tests.eo
index 43f72fb7..878a1c60 100644
--- a/tests/org/eolang/math/real-tests.eo
+++ b/tests/org/eolang/math/real-tests.eo
@@ -27,7 +27,7 @@
 +home https://github.com/objectionary/eo
 +tests
 +package org.eolang.math
-+version 0.51.3
++version 0.51.6
 +unlint sparse-decoration
 
 # This unit test is supposed to check the functionality of the corresponding object.
diff --git a/tests/org/eolang/nan-tests.eo b/tests/org/eolang/nan-tests.eo
index edee3738..ecc385b3 100644
--- a/tests/org/eolang/nan-tests.eo
+++ b/tests/org/eolang/nan-tests.eo
@@ -24,7 +24,7 @@
 +home https://github.com/objectionary/eo
 +package org.eolang
 +tests
-+version 0.51.3
++version 0.51.6
 +unlint sparse-decoration
 
 # This unit test is supposed to check the functionality of the corresponding object.
diff --git a/tests/org/eolang/negative-infinity-tests.eo b/tests/org/eolang/negative-infinity-tests.eo
index 6c517c99..1851b8a2 100644
--- a/tests/org/eolang/negative-infinity-tests.eo
+++ b/tests/org/eolang/negative-infinity-tests.eo
@@ -24,7 +24,7 @@
 +home https://github.com/objectionary/eo
 +package org.eolang
 +tests
-+version 0.51.3
++version 0.51.6
 +unlint sparse-decoration
 
 # Equal to.
diff --git a/tests/org/eolang/number-tests.eo b/tests/org/eolang/number-tests.eo
index 829b76aa..918a1d90 100644
--- a/tests/org/eolang/number-tests.eo
+++ b/tests/org/eolang/number-tests.eo
@@ -24,7 +24,7 @@
 +home https://github.com/objectionary/eo
 +tests
 +package org.eolang
-+version 0.51.3
++version 0.51.6
 +unlint sparse-decoration
 
 # This unit test is supposed to check the functionality of the corresponding object.
diff --git a/tests/org/eolang/positive-infinity-tests.eo b/tests/org/eolang/positive-infinity-tests.eo
index f94daf6b..9fd71e50 100644
--- a/tests/org/eolang/positive-infinity-tests.eo
+++ b/tests/org/eolang/positive-infinity-tests.eo
@@ -24,7 +24,7 @@
 +home https://github.com/objectionary/eo
 +package org.eolang
 +tests
-+version 0.51.3
++version 0.51.6
 +unlint sparse-decoration
 
 # Equal to.
diff --git a/tests/org/eolang/runtime-tests.eo b/tests/org/eolang/runtime-tests.eo
index 8e49f28b..99191283 100644
--- a/tests/org/eolang/runtime-tests.eo
+++ b/tests/org/eolang/runtime-tests.eo
@@ -24,7 +24,7 @@
 +home https://github.com/objectionary/eo
 +tests
 +package org.eolang
-+version 0.51.3
++version 0.51.6
 +unlint sparse-decoration
 +unlint unit-test-without-phi
 +unlint decorated-formation
diff --git a/tests/org/eolang/seq-tests.eo b/tests/org/eolang/seq-tests.eo
index 446fff07..a10fca37 100644
--- a/tests/org/eolang/seq-tests.eo
+++ b/tests/org/eolang/seq-tests.eo
@@ -24,7 +24,7 @@
 +home https://github.com/objectionary/eo
 +tests
 +package org.eolang
-+version 0.51.3
++version 0.51.6
 +unlint sparse-decoration
 
 # This unit test is supposed to check the functionality of the corresponding object.
diff --git a/tests/org/eolang/string-tests.eo b/tests/org/eolang/string-tests.eo
index db21696d..af4fbd06 100644
--- a/tests/org/eolang/string-tests.eo
+++ b/tests/org/eolang/string-tests.eo
@@ -24,7 +24,7 @@
 +home https://github.com/objectionary/eo
 +tests
 +package org.eolang
-+version 0.51.3
++version 0.51.6
 +unlint sparse-decoration
 
 # This unit test is supposed to check the functionality of the corresponding object.
diff --git a/tests/org/eolang/structs/bytes-as-array-tests.eo b/tests/org/eolang/structs/bytes-as-array-tests.eo
index abe2a944..e65e0f1d 100644
--- a/tests/org/eolang/structs/bytes-as-array-tests.eo
+++ b/tests/org/eolang/structs/bytes-as-array-tests.eo
@@ -26,7 +26,7 @@
 +home https://github.com/objectionary/eo
 +tests
 +package org.eolang.structs
-+version 0.51.3
++version 0.51.6
 +unlint sparse-decoration
 
 # This unit test is supposed to check the functionality of the corresponding object.
diff --git a/tests/org/eolang/structs/hash-code-of-tests.eo b/tests/org/eolang/structs/hash-code-of-tests.eo
index cdac6e9c..8d70273f 100644
--- a/tests/org/eolang/structs/hash-code-of-tests.eo
+++ b/tests/org/eolang/structs/hash-code-of-tests.eo
@@ -25,7 +25,7 @@
 +home https://github.com/objectionary/eo
 +tests
 +package org.eolang.structs
-+version 0.51.3
++version 0.51.6
 +unlint sparse-decoration
 
 # This unit test is supposed to check the functionality of the corresponding object.
diff --git a/tests/org/eolang/structs/list-tests.eo b/tests/org/eolang/structs/list-tests.eo
index c93341b6..44754896 100644
--- a/tests/org/eolang/structs/list-tests.eo
+++ b/tests/org/eolang/structs/list-tests.eo
@@ -26,7 +26,7 @@
 +home https://github.com/objectionary/eo
 +tests
 +package org.eolang.structs
-+version 0.51.3
++version 0.51.6
 +unlint sparse-decoration
 
 # This unit test is supposed to check the functionality of the corresponding object.
diff --git a/tests/org/eolang/structs/map-tests.eo b/tests/org/eolang/structs/map-tests.eo
index 67c7cc49..005d14fb 100644
--- a/tests/org/eolang/structs/map-tests.eo
+++ b/tests/org/eolang/structs/map-tests.eo
@@ -25,7 +25,7 @@
 +home https://github.com/objectionary/eo
 +tests
 +package org.eolang.structs
-+version 0.51.3
++version 0.51.6
 +unlint sparse-decoration
 
 # This unit test is supposed to check the functionality of the corresponding object.
diff --git a/tests/org/eolang/structs/range-of-ints-tests.eo b/tests/org/eolang/structs/range-of-ints-tests.eo
index 5e807052..3e432b13 100644
--- a/tests/org/eolang/structs/range-of-ints-tests.eo
+++ b/tests/org/eolang/structs/range-of-ints-tests.eo
@@ -25,7 +25,7 @@
 +home https://github.com/objectionary/eo
 +tests
 +package org.eolang.structs
-+version 0.51.3
++version 0.51.6
 +unlint sparse-decoration
 
 # This unit test is supposed to check the functionality of the corresponding object.
diff --git a/tests/org/eolang/structs/range-tests.eo b/tests/org/eolang/structs/range-tests.eo
index 69ba0463..130ac381 100644
--- a/tests/org/eolang/structs/range-tests.eo
+++ b/tests/org/eolang/structs/range-tests.eo
@@ -25,7 +25,7 @@
 +home https://github.com/objectionary/eo
 +tests
 +package org.eolang.structs
-+version 0.51.3
++version 0.51.6
 +unlint sparse-decoration
 
 # This unit test is supposed to check the functionality of the corresponding object.
diff --git a/tests/org/eolang/structs/set-tests.eo b/tests/org/eolang/structs/set-tests.eo
index 4a8e213e..45eff86a 100644
--- a/tests/org/eolang/structs/set-tests.eo
+++ b/tests/org/eolang/structs/set-tests.eo
@@ -25,7 +25,7 @@
 +home https://github.com/objectionary/eo
 +tests
 +package org.eolang.structs
-+version 0.51.3
++version 0.51.6
 +unlint sparse-decoration
 
 # This unit test is supposed to check the functionality of the corresponding object.
diff --git a/tests/org/eolang/switch-tests.eo b/tests/org/eolang/switch-tests.eo
index ef1166db..7e592af3 100644
--- a/tests/org/eolang/switch-tests.eo
+++ b/tests/org/eolang/switch-tests.eo
@@ -24,7 +24,7 @@
 +home https://github.com/objectionary/eo
 +tests
 +package org.eolang
-+version 0.51.3
++version 0.51.6
 +unlint sparse-decoration
 
 # This unit test is supposed to check the functionality of the corresponding object.
diff --git a/tests/org/eolang/sys/os-tests.eo b/tests/org/eolang/sys/os-tests.eo
index e491ba18..d4552c16 100644
--- a/tests/org/eolang/sys/os-tests.eo
+++ b/tests/org/eolang/sys/os-tests.eo
@@ -25,7 +25,7 @@
 +home https://github.com/objectionary/eo
 +tests
 +package org.eolang.sys
-+version 0.51.3
++version 0.51.6
 +unlint sparse-decoration
 
 # This unit test is supposed to check the functionality of the corresponding object.
diff --git a/tests/org/eolang/sys/posix-tests.eo b/tests/org/eolang/sys/posix-tests.eo
index 4a04717d..907b7a19 100644
--- a/tests/org/eolang/sys/posix-tests.eo
+++ b/tests/org/eolang/sys/posix-tests.eo
@@ -26,7 +26,7 @@
 +home https://github.com/objectionary/eo
 +tests
 +package org.eolang.sys
-+version 0.51.3
++version 0.51.6
 +unlint sparse-decoration
 
 # This unit test is supposed to check the functionality of the corresponding object.
diff --git a/tests/org/eolang/sys/win32-tests.eo b/tests/org/eolang/sys/win32-tests.eo
index da39e8be..0579c451 100644
--- a/tests/org/eolang/sys/win32-tests.eo
+++ b/tests/org/eolang/sys/win32-tests.eo
@@ -26,7 +26,7 @@
 +home https://github.com/objectionary/eo
 +tests
 +package org.eolang.sys
-+version 0.51.3
++version 0.51.6
 +unlint sparse-decoration
 
 # This unit test is supposed to check the functionality of the corresponding object.
diff --git a/tests/org/eolang/try-tests.eo b/tests/org/eolang/try-tests.eo
index 677afc6f..455b1462 100644
--- a/tests/org/eolang/try-tests.eo
+++ b/tests/org/eolang/try-tests.eo
@@ -24,7 +24,7 @@
 +home https://github.com/objectionary/eo
 +tests
 +package org.eolang
-+version 0.51.3
++version 0.51.6
 +unlint sparse-decoration
 
 # This unit test is supposed to check the functionality of the corresponding object.
diff --git a/tests/org/eolang/tuple-tests.eo b/tests/org/eolang/tuple-tests.eo
index 76ef5942..ccfc61a8 100644
--- a/tests/org/eolang/tuple-tests.eo
+++ b/tests/org/eolang/tuple-tests.eo
@@ -24,7 +24,7 @@
 +home https://github.com/objectionary/eo
 +tests
 +package org.eolang
-+version 0.51.3
++version 0.51.6
 +unlint sparse-decoration
 
 # This unit test is supposed to check the functionality of the corresponding object.
diff --git a/tests/org/eolang/txt/regex-tests.eo b/tests/org/eolang/txt/regex-tests.eo
index fc04265a..cb97ea21 100644
--- a/tests/org/eolang/txt/regex-tests.eo
+++ b/tests/org/eolang/txt/regex-tests.eo
@@ -25,7 +25,7 @@
 +home https://github.com/objectionary/eo
 +tests
 +package org.eolang.txt
-+version 0.51.3
++version 0.51.6
 +unlint sparse-decoration
 
 # This unit test is supposed to check the functionality of the corresponding object.
diff --git a/tests/org/eolang/txt/sprintf-tests.eo b/tests/org/eolang/txt/sprintf-tests.eo
index 18e6a773..22af6574 100644
--- a/tests/org/eolang/txt/sprintf-tests.eo
+++ b/tests/org/eolang/txt/sprintf-tests.eo
@@ -25,7 +25,7 @@
 +home https://github.com/objectionary/eo
 +tests
 +package org.eolang.txt
-+version 0.51.3
++version 0.51.6
 +unlint sparse-decoration
 +unlint wrong-sprintf-arguments
 
diff --git a/tests/org/eolang/txt/sscanf-tests.eo b/tests/org/eolang/txt/sscanf-tests.eo
index 3b7f17e3..e2827c92 100644
--- a/tests/org/eolang/txt/sscanf-tests.eo
+++ b/tests/org/eolang/txt/sscanf-tests.eo
@@ -27,7 +27,7 @@
 +home https://github.com/objectionary/eo
 +tests
 +package org.eolang.txt
-+version 0.51.3
++version 0.51.6
 +unlint sparse-decoration
 
 # This unit test is supposed to check the functionality of the corresponding object.
diff --git a/tests/org/eolang/txt/text-tests.eo b/tests/org/eolang/txt/text-tests.eo
index bb3f3cf4..b577a5e6 100644
--- a/tests/org/eolang/txt/text-tests.eo
+++ b/tests/org/eolang/txt/text-tests.eo
@@ -27,7 +27,7 @@
 +home https://github.com/objectionary/eo
 +tests
 +package org.eolang.txt
-+version 0.51.3
++version 0.51.6
 +unlint sparse-decoration
 
 # This unit test is supposed to check the functionality of the corresponding object.
diff --git a/tests/org/eolang/while-tests.eo b/tests/org/eolang/while-tests.eo
index 204d27a2..daab35f0 100644
--- a/tests/org/eolang/while-tests.eo
+++ b/tests/org/eolang/while-tests.eo
@@ -24,7 +24,7 @@
 +home https://github.com/objectionary/eo
 +tests
 +package org.eolang
-+version 0.51.3
++version 0.51.6
 +unlint sparse-decoration
 
 # This unit test is supposed to check the functionality of the corresponding object.