Mark Shannon added the comment:
This is either a "won't fix" or an "impossible to fix" depending on your point
of view.
PATIENT:
It hurts whenever I press ctrl-C
DOCTOR:
Then don't press ctrl-C
The problem is that ctrl-C can provoke an interrupt at any point in the
program, and thus break presumed invariants.
try-finally has the same problem.
>From the observable side effects it is indistinguishable whether an interrupt
>occurs after the last instruction in an __enter__ function or after the first
>(side-effect-less) instruction after the __enter__.
Likewise the last pre-__exit__ and first in-__exit__ instructions are
effectively the same from the point of view from observable side-effects, but
are different from the point of view of the handling of exceptions.
----------
nosy: +Mark Shannon
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Python tracker <[email protected]>
<http://bugs.python.org/issue29988>
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