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AssertionError when runningprofile on code containing generator expression #110514

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gaogaotiantian
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3.12only security fixes3.13bugs and security fixestype-bugAn unexpected behavior, bug, or error
@chgnrdv

Description

@chgnrdv

Bug report

Bug description:

Bisected to411b169.

Minimal repro (save it to file and run aspython -m profile script.py):

next(iforiinrange(10))

Output:

Exception ignored in: <generator object <genexpr> at 0x7f48fac29010>Traceback (most recent call last):  File "/home/radislav/projects/cpython/Lib/profile.py", line 209, in trace_dispatch_i    if self.dispatch[event](self, frame, t):       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^  File "/home/radislav/projects/cpython/Lib/profile.py", line 293, in trace_dispatch_return    assert frame is self.cur[-2].f_back, ("Bad return", self.cur[-3])           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^AssertionError: ('Bad return', ('script.py', 1, '<module>'))         5 function calls in 0.114 seconds   Ordered by: standard name   ncalls  tottime  percall  cumtime  percall filename:lineno(function)        1    0.000    0.000    0.114    0.114 :0(exec)        1    0.000    0.000    0.000    0.000 :0(next)        1    0.000    0.000    0.114    0.114 profile:0(<code object <module> at 0x7f48faba08c0, file "script.py", line 1>)        0    0.000             0.000          profile:0(profiler)        1    0.000    0.000    0.000    0.000 script.py:1(<genexpr>)        1    0.114    0.114    0.114    0.114 script.py:1(<module>)

CPython versions tested on:

3.12, CPython main branch

Operating systems tested on:

Linux

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3.12only security fixes3.13bugs and security fixestype-bugAn unexpected behavior, bug, or error

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