annotationlib: ref.evaluate() not working for generics as local variables #138151
Description
Bug report
Bug description:
Usually, when a local variable is introduced after getting a ForwardRef, evaluate() picks this up and correctly evaluates it using the self.__cell__ short-circuit. However, this does not work when that local variable is a generic. It does still work for globals.
from annotationlib import Format, get_annotations
def works_global():
class Demo:
x: sequence_a[int]
fwdref = get_annotations(Demo, format=Format.FORWARDREF)['x']
print(f"Global {fwdref!r}")
global sequence_a
sequence_a = list
evaluated = fwdref.evaluate()
print(f"Evaluated {evaluated!r}")
def works_nongeneric():
class Demo:
nonlocal alias # Optional
x: alias
fwdref = get_annotations(Demo, format=Format.FORWARDREF)['x']
print(f"Global {fwdref!r}")
alias = int
evaluated = fwdref.evaluate()
print(f"Evaluated {evaluated!r}")
def fails():
class Demo:
nonlocal sequence_b
x: sequence_b[int]
fwdref = get_annotations(Demo, format=Format.FORWARDREF)['x']
print(f"Local {fwdref!r}")
sequence_b = list
evaluated = fwdref.evaluate() # NameError
print(f"Evaluated {evaluated!r}")
works_global()
works_nongeneric()
fails()CPython versions tested on:
CPython main branch, 3.14
Operating systems tested on:
Linux