Revert "Set co_name for cells run line by line. Fixes ipython/ipykern…

…el#841"

This reverts commit d11e987.

IPython/core/interactiveshell.py

@@ -15,7 +15,6 @@
 import ast
 import atexit
 import builtins as builtin_mod
-import dis
 import functools
 import inspect
 import os
@@ -3183,29 +3182,6 @@ def transform_ast(self, node):
  ast.fix_missing_locations(node)
  return node
 
- def _update_code_co_name(self, code):
- """Python 3.10 changed the behaviour so that whenever a code object
- is assembled in the compile(ast) the co_firstlineno would be == 1.
-
- This makes pydevd/debugpy think that all cells invoked are the same
- since it caches information based on (co_firstlineno, co_name, co_filename).
-
- Given that, this function changes the code 'co_name' to be unique
- based on the first real lineno of the code (which also has a nice
- side effect of customizing the name so that it's not always <module>).
-
- See: https://github.com/ipython/ipykernel/issues/841
- """
- if not hasattr(code, "replace"):
- # It may not be available on older versions of Python (only
- # available for 3.8 onwards).
- return code
- try:
- first_real_line = next(dis.findlinestarts(code))[1]
- except StopIteration:
- return code
- return code.replace(co_name="<cell line: %s>" % (first_real_line,))
-
  async def run_ast_nodes(
  self,
  nodelist: ListType[stmt],
@@ -3304,7 +3280,6 @@ def compare(code):
  else 0x0
  ):
  code = compiler(mod, cell_name, mode)
- code = self._update_code_co_name(code)
  asy = compare(code)
  if await self.run_code(code, result, async_=asy):
  return True