New submission from Ned Batchelder <n...@nedbatchelder.com>:
Note: this is very similar to https://bugs.python.org/issue42810 This was originally reported against coverage.py: https://github.com/nedbat/coveragepy/issues/1205 ---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 print(sys.version) sys.settrace(trace) def func(): if A: if B: if C: if D: return False else: return False elif E and F: return True A = B = True C = False func() ------------------------- This produces this trace output: 3.10.0rc1 (default, Aug 3 2021, 15:03:55) [Clang 12.0.0 (clang-1200.0.32.29)] call 13: def func(): line 14: if A: line 15: if B: line 16: if C: line 21: elif E and F: retu 21: elif E and F: The elif on line 21 is not executed, and should not be traced. Also, if I change line 21 to `elif E:`, then the trace changes to: 3.10.0rc1 (default, Aug 3 2021, 15:03:55) [Clang 12.0.0 (clang-1200.0.32.29)] call 13: def func(): line 14: if A: line 15: if B: line 16: if C: line 22: return True retu 22: return True ---------- components: Interpreter Core keywords: 3.10regression messages: 399003 nosy: Mark.Shannon, nedbat priority: normal severity: normal status: open title: Nested if/else gets phantom else trace again (3.10) type: behavior versions: Python 3.10 _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue44840> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
