diff --git a/data_lang/j8.py b/data_lang/j8.py
index 6fadad139c..6387e476e5 100644
--- a/data_lang/j8.py
+++ b/data_lang/j8.py
@@ -26,9 +26,11 @@
 import math
 
 from _devbuild.gen.id_kind_asdl import Id, Id_t, Id_str
-from _devbuild.gen.value_asdl import (value, value_e, value_t, value_str, Obj)
 from _devbuild.gen.nil8_asdl import (nvalue, nvalue_t)
+from _devbuild.gen.runtime_asdl import error_code_e
+from _devbuild.gen.value_asdl import (value, value_e, value_t, value_str, Obj)
 
+from core import bash_impl
 from core import error
 from data_lang import pyj8
 # dependency issue: consts.py pulls in frontend/option_def.py
@@ -360,14 +362,15 @@ def _PrintSparseArray(self, val, level):
 
         self._PrintBashPrefix('"SparseArray",', level)
 
-        if len(val.d) == 0:  # Special case like Python/JS
+        if bash_impl.SparseArray_Count(
+                val) == 0:  # Special case like Python/JS
             self.buf.write('{}')
         else:
             self.buf.write('{')
             self._MaybeNewline()
 
             i = 0
-            for k, v in iteritems(val.d):
+            for k in bash_impl.SparseArray_GetKeys(val):
                 if i != 0:
                     self.buf.write(',')
                     self._MaybeNewline()
@@ -378,6 +381,8 @@ def _PrintSparseArray(self, val, level):
                 self.buf.write(':')
                 self._MaybeSpace()
 
+                v, error_code = bash_impl.SparseArray_GetElement(val, k)
+                assert error_code == error_code_e.OK, error_code
                 pyj8.WriteString(v, self.options, self.buf)
 
                 i += 1
@@ -394,14 +399,14 @@ def _PrintBashArray(self, val, level):
 
         self._PrintBashPrefix('"BashArray",', level)
 
-        if len(val.strs) == 0:  # Special case like Python/JS
+        if bash_impl.BashArray_Count(val) == 0:  # Special case like Python/JS
             self.buf.write('{}')
         else:
             self.buf.write('{')
             self._MaybeNewline()
 
             first = True
-            for i, s in enumerate(val.strs):
+            for i, s in enumerate(bash_impl.BashArray_GetValues(val)):
                 if s is None:
                     continue
 
@@ -431,14 +436,14 @@ def _PrintBashAssoc(self, val, level):
 
         self._PrintBashPrefix('"BashAssoc",', level)
 
-        if len(val.d) == 0:  # Special case like Python/JS
+        if bash_impl.BashAssoc_Count(val) == 0:  # Special case like Python/JS
             self.buf.write('{}')
         else:
             self.buf.write('{')
             self._MaybeNewline()
 
             i = 0
-            for k2, v2 in iteritems(val.d):
+            for k2, v2 in iteritems(bash_impl.BashAssoc_GetDict(val)):
                 if i != 0:
                     self.buf.write(',')
                     self._MaybeNewline()
diff --git a/display/pp_value.py b/display/pp_value.py
index e236fa0f06..97ac02ea7a 100644
--- a/display/pp_value.py
+++ b/display/pp_value.py
@@ -7,7 +7,9 @@
 import math
 
 from _devbuild.gen.pretty_asdl import (doc, Measure, MeasuredDoc)
+from _devbuild.gen.runtime_asdl import error_code_e
 from _devbuild.gen.value_asdl import Obj, value, value_e, value_t, value_str
+from core import bash_impl
 from data_lang import j8
 from data_lang import j8_lite
 from display import ansi
@@ -175,10 +177,10 @@ def _YshDict(self, vdict):
     def _BashArray(self, varray):
         # type: (value.BashArray) -> MeasuredDoc
         type_name = self._Styled(self.type_style, AsciiText('BashArray'))
-        if len(varray.strs) == 0:
+        if bash_impl.BashArray_Count(varray) == 0:
             return _Concat([AsciiText('('), type_name, AsciiText(')')])
         mdocs = []  # type: List[MeasuredDoc]
-        for s in varray.strs:
+        for s in bash_impl.BashArray_GetValues(varray):
             if s is None:
                 mdocs.append(AsciiText('null'))
             else:
@@ -189,10 +191,10 @@ def _BashArray(self, varray):
     def _BashAssoc(self, vassoc):
         # type: (value.BashAssoc) -> MeasuredDoc
         type_name = self._Styled(self.type_style, AsciiText('BashAssoc'))
-        if len(vassoc.d) == 0:
+        if bash_impl.BashAssoc_Count(vassoc) == 0:
             return _Concat([AsciiText('('), type_name, AsciiText(')')])
         mdocs = []  # type: List[MeasuredDoc]
-        for k2, v2 in iteritems(vassoc.d):
+        for k2, v2 in iteritems(bash_impl.BashAssoc_GetDict(vassoc)):
             mdocs.append(
                 _Concat([
                     AsciiText('['),
@@ -206,10 +208,12 @@ def _BashAssoc(self, vassoc):
     def _SparseArray(self, val):
         # type: (value.SparseArray) -> MeasuredDoc
         type_name = self._Styled(self.type_style, AsciiText('SparseArray'))
-        if len(val.d) == 0:
+        if bash_impl.SparseArray_Count(val) == 0:
             return _Concat([AsciiText('('), type_name, AsciiText(')')])
         mdocs = []  # type: List[MeasuredDoc]
-        for k2, v2 in iteritems(val.d):
+        for k2 in bash_impl.SparseArray_GetKeys(val):
+            v2, error_code = bash_impl.SparseArray_GetElement(val, k2)
+            assert error_code == error_code_e.OK, error_code
             mdocs.append(
                 _Concat([
                     AsciiText('['),