New submission from Ned Batchelder <[email protected]>:
(Using CPython commit 6b1ac809b9)
This program never executes line 4, but the "if not __debug__" is partly
attributed to line 4, giving an incorrect trace:
for value in [True, False]:
if value:
if not __debug__:
1/0 # line 4
else:
x = 6
Using a simple trace program
(https://github.com/nedbat/coveragepy/blob/master/lab/run_trace.py), it
produces this output:
call <string> 1 @-1
line <string> 1 @0
line <string> 2 @8
line <string> 3 @12
line <string> 4 @14
line <string> 1 @4
line <string> 2 @8
line <string> 6 @16
line <string> 1 @4
return <string> 1 @24
Various simplifications of the program make the problem go away.
----------
components: Interpreter Core
messages: 384178
nosy: Mark.Shannon, nedbat
priority: normal
severity: normal
status: open
title: Traced line number is wrong for "if not __debug__"
versions: Python 3.10
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Python tracker <[email protected]>
<https://bugs.python.org/issue42803>
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