# Bug report ### Bug description: If `__builtins__` is not a dict, you can get a SystemError: ```pycon >>> import types >>> exec("import builtins; builtins.print(3)", {"__builtins__": types.MappingProxyType({})}) Traceback (most recent call last): File "<stdin>", line 1, in <module> exec("import builtins; builtins.print(3)", {"__builtins__": types.MappingProxyType({})}) File "<string>", line 1, in <module> SystemError: Objects/dictobject.c:1761: bad argument to internal function ``` Originally found this while playing with https://oskaerik.github.io/theevalgame/ ### CPython versions tested on: 3.11, CPython main branch ### Operating systems tested on: macOS <!-- gh-linked-prs --> ### Linked PRs * gh-112770 * gh-113103 * gh-113105 <!-- /gh-linked-prs -->
Bug report
Bug description:
If
__builtins__is not a dict, you can get a SystemError:Originally found this while playing with https://oskaerik.github.io/theevalgame/
CPython versions tested on:
3.11, CPython main branch
Operating systems tested on:
macOS
Linked PRs