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Title: gh-146388: Add null check for `sym_new(ctx)` in `make_bottom` by A0su · Pull Request #146389 · python/cpython · GitHub

Open Graph Title: gh-146388: Add null check for `sym_new(ctx)` in `make_bottom` by A0su · Pull Request #146389 · python/cpython

X Title: gh-146388: Add null check for `sym_new(ctx)` in `make_bottom` by A0su · Pull Request #146389 · python/cpython

Description: optimizer_symbols.c: make_bottom NULL deref when arena full sym_new(ctx) at line 1535 can return NULL when the type arena is full. Result immediately dereferenced without check. Every other sym_new call site checks for NULL. This is a sub-issue of #146102 with gist details Issue: gh-146388

Open Graph Description: optimizer_symbols.c: make_bottom NULL deref when arena full sym_new(ctx) at line 1535 can return NULL when the type arena is full. Result immediately dereferenced without check. Every other sym_new...

X Description: optimizer_symbols.c: make_bottom NULL deref when arena full sym_new(ctx) at line 1535 can return NULL when the type arena is full. Result immediately dereferenced without check. Every other sym_new...

Opengraph URL: https://github.com/python/cpython/pull/146389

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gh-146388: Add null check for sym_new(ctx) in make_bottom https://github.com/python/cpython/pull/146389/files#top
Show all changes 7 commits https://github.com/python/cpython/pull/146389/files
e99eb55 add null check for sym_new(ctx) in make_bottom A0su Mar 24, 2026 https://github.com/python/cpython/pull/146389/commits/e99eb555407d22b67ccd4ac15001b6f4919a2ec4
8d0ef9d fix typo on var name A0su Mar 24, 2026 https://github.com/python/cpython/pull/146389/commits/8d0ef9d8d96258bc79fe6eb079e77d650d07c0d0
d2ff2c5 use out_of_space instead of out_of_space_ref to align return type A0su Mar 24, 2026 https://github.com/python/cpython/pull/146389/commits/d2ff2c57ec9f0ab394fdae98b5256c4ab9da8c87
a6a2fde add blurb A0su Mar 26, 2026 https://github.com/python/cpython/pull/146389/commits/a6a2fdef2bdbedbc61e10fc320ca25fd8d37efc7
e76d0ea update blurb based on comment A0su Mar 26, 2026 https://github.com/python/cpython/pull/146389/commits/e76d0ea0c53c33fe8498f13e3c7d26b2c447bd71
5a393d2 fix blurb based :func: A0su Mar 27, 2026 https://github.com/python/cpython/pull/146389/commits/5a393d26ebd827449506a55bab5d94ba169d28f9
1ec767b Update 2026-03-26-11-18-45.gh-issue-146388.O0u1c3.rst A0su Mar 27, 2026 https://github.com/python/cpython/pull/146389/commits/1ec767b501859e7680f105ac598e7fd9883af534
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