Method call on imported definition differs inside of a list comprehension

Bug report

Bug description:

import re
[x for x in [] if re.match(".*", x)]

vs:

import re
re.match(".*", x)

When you disassemble these you'll see the inlined one will be doing a LOAD_ATTR 3 (match + NULL|self) while the one outside of the comprehension will be doing a PUSH_NULL/CALL which is to disable the method call optimization on things which are likely not methods.

These should both have the same byte code. There's no perceivable code execution difference other than performance though.

CPython versions tested on:

3.12, CPython main branch

Operating systems tested on:

Linux

Comece desmontando os dois exemplos de Python do relatório no CPython 3.12 ou em main e, em seguida, rastreie como os caminhos de chamada da compreensão de listas e de nível superior são compilados. O trabalho estará concluído quando ambas as formas usarem bytecode consistente para a chamada da definição importada sem alterar o comportamento observável.