Bug report

Bug description:

class D:
    vals = [(lambda: __class__)() for _ in range(1)]

gives

SystemError: compiler_lookup_arg(name='__class__') with reftype=5 failed in D; freevars of code <lambda>: ('__class__',)

tested on main ( f4bda4d ) and on 3.12.8 (debug build). Issue #149806 looks related, but I tried that example on #149806 and it's not fixed by it.

CPython versions tested on:

CPython main branch

Operating systems tested on:

Linux

Linked PRs

• gh-150700: Fix class-scope inline comprehensions when nested scopes reference __class__ and friends #150735
• [3.15] gh-150700: Fix class-scope inline comprehensions when nested scopes reference __class__ and friends (GH-150735) #151211
• [3.14] gh-150700: Fix class-scope inline comprehensions when nested scopes reference __class__ and friends (GH-150735) #151212