Bug report

Bug description:

a if (1 if b else c) else d

output (Python 3.12.0rc3+):

python: Python/flowgraph.c:1598: optimize_cfg: Assertion `no_redundant_nops(g)' failed.

tested with the current 3.12 branch (538f505)

CPython versions tested on:

3.12

Operating systems tested on:

Linux

Linked PRs

• [3.12] gh-109889: comment out assertion indicating a failed optimization of a redundant NOP #109899
• gh-109889: fix compiler's redundant NOP detection to look past NOPs with no lineno when looking for the next instruction's lineno #109987
• [3.12] gh-109889: fix compiler's redundant NOP detection to look past NOPs with no lineno when looking for the next instruction's lineno (GH-109987) #110048