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

Inizia disassemblando i due esempi Python del report su CPython 3.12 o main, quindi traccia come vengono compilati i percorsi di chiamata della list comprehension e della chiamata al livello superiore. Il lavoro è completato quando entrambe le forme usano bytecode coerente per la chiamata alla definizione importata senza modificare il comportamento osservabile.