Fix #15011, Exception.text may be None#15012
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And add a test for it.
This was referenced Oct 21, 2025
Carreau
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Jun 12, 2026
xml.etree.ElementTree.ParseError is a SyntaxError subclass that leaves .text set to None; IPython 9.6.0 raised an AssertionError in ListTB._format_exception_only when rendering it. The guard was added as part of #15012, but without a test; this locks the behavior in. The test fails if the None check in _format_exception_only is removed. Closes #15024 https://claude.ai/code/session_01AtmUVnQwZfjDBuUzF7TdGh
Carreau
pushed a commit
that referenced
this pull request
Jun 13, 2026
xml.etree.ElementTree.ParseError is a SyntaxError subclass that leaves .text set to None; IPython 9.6.0 raised an AssertionError in ListTB._format_exception_only when rendering it. The guard was added as part of #15012, but without a test; this locks the behavior in. The test fails if the None check in _format_exception_only is removed. Closes #15024 https://claude.ai/code/session_01AtmUVnQwZfjDBuUzF7TdGh
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And add a test for it.