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Description
Bug report
Bug description:
The exception listing inrepr(exc_grp) diverges fromexc_grp.exceptions when the initial sequence of exceptions passed to the constructor has been mutated.
Expected behavior: The exceptions listed inrepr(exc_grp) matchexc_grp.exceptions, which is immutable.
Reproducer:
exceptions=list[Exception]()exceptions.append(ValueError())exc_grp=ExceptionGroup("",exceptions)print(f"{exc_grp.exceptions=!r}")print(f"{exc_grp=!r}")print()exceptions.clear()print(f"{exc_grp.exceptions=!r}")print(f"{exc_grp=!r}")
Output:
exc_grp.exceptions=(ValueError(),)exc_grp=ExceptionGroup('', [ValueError()])exc_grp.exceptions=(ValueError(),)exc_grp=ExceptionGroup('', [])Expected output:
exc_grp.exceptions=(ValueError(),)exc_grp=ExceptionGroup('', [ValueError()])exc_grp.exceptions=(ValueError(),)exc_grp=ExceptionGroup('', [ValueError()])CPython versions tested on:
3.11, 3.12, 3.13, 3.14
Operating systems tested on:
Linux
Linked PRs
- gh-141732: Fix
ExceptionGrouprepr changing when original exception sequence is mutated #141736 - [3.14] gh-141732: Fix
ExceptionGrouprepr changing when original exception sequence is mutated (GH-141736) #142388 - [3.13] gh-141732: Fix ExceptionGroup repr changing when original exception sequence is mutated (GH-141736) #142391