python · JelleZijlstra · Oct 22, 2024 · Oct 9, 2024 · Oct 9, 2024 · Oct 9, 2024
diff --git a/Doc/library/dis.rst b/Doc/library/dis.rst
@@ -1370,6 +1370,10 @@ iterations of the loop.
    .. versionchanged:: 3.12
       Up until 3.11 the iterator was popped when it was exhausted.
 
+.. opcode:: CHECK_ITER
+
+   Check that ``STACK[-1]`` is an :term:`iterator`.
+
 .. opcode:: LOAD_GLOBAL (namei)
 
    Loads the global named ``co_names[namei>>1]`` onto the stack.

diff --git a/Include/internal/pycore_magic_number.h b/Include/internal/pycore_magic_number.h
@@ -260,6 +260,7 @@ Known values:
     Python 3.14a1 3606 (Specialize CALL_KW)
     Python 3.14a1 3607 (Add pseudo instructions JUMP_IF_TRUE/FALSE)
     Python 3.14a1 3608 (Add support for slices)
+    Python 3.14a1 3609 (Add CHECK_ITER instruction)
 
     Python 3.15 will start with 3650
 
@@ -272,7 +273,7 @@ PC/launcher.c must also be updated.
 
 */
 
-#define PYC_MAGIC_NUMBER 3608
+#define PYC_MAGIC_NUMBER 3609
 /* This is equivalent to converting PYC_MAGIC_NUMBER to 2 bytes
    (little-endian) and then appending b'\r\n'. */
 #define PYC_MAGIC_NUMBER_TOKEN \

diff --git a/Include/internal/pycore_opcode_metadata.h b/Include/internal/pycore_opcode_metadata.h
diff --git a/Include/internal/pycore_uop_ids.h b/Include/internal/pycore_uop_ids.h
diff --git a/Include/internal/pycore_uop_metadata.h b/Include/internal/pycore_uop_metadata.h
diff --git a/Include/opcode_ids.h b/Include/opcode_ids.h