polfg 7a0109a6f6 Fix except-as-e handler after return-in-if inside try ...

Two combined fixes for the 'return inside if inside try / except as e'
pattern:

1. The return-in-if skip logic could consume the PUSH_EXC_INFO that
   immediately follows a return inside an if within a try. Dropping it
   left the handler without its exception sentinel, so the 'as e'
   binding captured a garbage stack value and the handler was mis-nested
   as a statement in the try body. Never skip PUSH_EXC_INFO.

2. Suppress the compiler cleanup 'e = None' when the store value is an
   explicit None constant (LOAD_CONST None; STORE), not only the NULL
   placeholder form. With the binding now correct, this removes the
   spurious 'e = None; del e' tail. decompilation target: 236/239 files, corpus 41/95 (+1: utilities; 0 regressions).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

2026-06-08 12:15:57 +02:00

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