Bug report

Bug description:

I found the following error with the latest cpython 3.12 from git (4a0c118), which I build myself with --with-pydebug enabled.

source:

def get_namespace_uri():
    while element and something:
        try:
            return something
        except:
            pass

output (Python 3.12.0rc3+):

python3: Python/flowgraph.c:114: basicblock_addop: Assertion `0 <= oparg && oparg < (1 << 30)' failed.

CPython versions tested on:

3.12

Operating systems tested on:

Linux

Linked PRs

• gh-109627: duplicated smalll exit blocks need to be assigned jump target labels #109630
• [3.12] gh-109627: duplicated small exit blocks need to be assigned jump target labels (#109630) #109632