[Python-Dev] Compilation of "except FooExc as var" adds useless store

Paul G paul at ganssle.io
Sun Jan 6 11:37:34 EST 2019

I am not familiar enough with the compiler logic, but would it be possible to optimize this away by detecting whether the bound name has already been deleted during the body of the except statement?

On January 6, 2019 4:18:00 PM UTC, Chris Angelico <rosuav at gmail.com> wrote:
>On Mon, Jan 7, 2019 at 3:13 AM Paul G <paul at ganssle.io> wrote:
>> I think Serhiy is saying that if you delete exc before the except
>body ends, when the compiled code goes to delete it it will fail.
>Binding to None guarantees that there is something to delete.
>Ahh! Thank you. I interpreted that example as a "this is what it
>compiles to", rather than actual source code that might fail. Can we
>get this example, suitably annotated, into the documentation
>Python-Dev mailing list
>Python-Dev at python.org
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