[issue17288] cannot jump from a 'return' or 'exception' trace event
Xavier de Gaye
report at bugs.python.org
Mon Feb 26 12:29:59 EST 2018
Xavier de Gaye <xdegaye at gmail.com> added the comment:
Those are the changes with the current behavior from the behavior in 3.5 observed at the time of the initial bug report:
python 3.7:
return.py Unchanged.
exception.py After a jump from the 'exception' event into the previous statement, the ensuing 'step' command triggers a trace 'return' event.
jump.py The sequence of trace events is unchanged and Python aborts now at the last 'step' command with:
python: Python/ceval.c:1083: _PyEval_EvalFrameDefault: Assertion `STACK_LEVEL() <= co->co_stacksize' failed.
python 3.8:
return.py Unchanged.
exception.py Unchanged from 3.7.
jump.py The sequence of trace events is unchanged and the last 'step' command prints now the cryptic error msg:
TypeError: 'NoneType' object is not callable
> /path/to/jump.py(2)gen()->0
-> for i in range(1):
Applying the last patch fixes both 3.7 and 3.8. I can build a PR from this patch. An explanation should be given for the behavior of 3.7 and 3.8 in the jump.py case.
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title: cannot jump from a return after setting f_lineno -> cannot jump from a 'return' or 'exception' trace event
versions: +Python 3.7, Python 3.8 -Python 3.5
Added file: https://bugs.python.org/file47463/exception.py
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