New submission from Ned Batchelder <[email protected]>:
A simple function with a last "pass" statement gets traced incorrectly,
attributing the return to the pass instead of the actual last statement
executed:
--- 8< --------------------------
import linecache, sys
def trace(frame, event, arg):
# The weird globals here is to avoid a NameError on shutdown...
if frame.f_code.co_filename == globals().get("__file__"):
lineno = frame.f_lineno
print("{} {}: {}".format(event[:4], lineno, linecache.getline(__file__,
lineno).rstrip()))
return trace
def wrong_loop(x):
if x:
if x:
print(4)
else:
pass
print(sys.version)
sys.settrace(trace)
wrong_loop(8)
----------------------------------
On 3.9 and before, this produces:
3.9.5 (default, May 5 2021, 06:50:43)
[Clang 12.0.0 (clang-1200.0.32.29)]
call 10: def wrong_loop(x):
line 11: if x:
line 12: if x:
line 13: print(4)
4
line 15: pass
retu 15: pass
Partly I'm writing this issue to record the problem, but partly to get a
decision: will there be fixes made to 3.9 (or before) for issues like this?
----------
components: Interpreter Core
messages: 397791
nosy: Mark.Shannon, nedbat
priority: normal
severity: normal
status: open
title: Final "pass" is traced incorrectly in 3.9 (and before)
type: behavior
versions: Python 3.6, Python 3.7, Python 3.8, Python 3.9
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Python tracker <[email protected]>
<https://bugs.python.org/issue44672>
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