New submission from Ned Batchelder <n...@nedbatchelder.com>:
When a return statement also executes a finally clause, the sequence of lines
reported to the trace function is different in 3.8 than it has been before 3.8:
$ cat finally_trace.py
def return_from_finally():
try:
print("returning")
return 17
finally:
print("finally")
def trace(frame, event, arg):
print(frame.f_lineno, event)
return trace
import sys
sys.settrace(trace)
return_from_finally()
$ python3.7 finally_trace.py
1 call
2 line
3 line
returning
4 line
6 line
finally
6 return
$ python3.8 finally_trace.py
1 call
2 line
3 line
returning
4 line
6 line
finally
4 line
4 return
Is this intentional? Is it a bug? Will it change back before 3.8 is shipped?
----------
components: Interpreter Core
messages: 325484
nosy: nedbat
priority: normal
severity: normal
status: open
title: Python 3.8 changes how returns through finally clauses are traced
type: behavior
versions: Python 3.8
_______________________________________
Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue34705>
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