Invalid error messages after GH-134077 · Issue #135422 · python/cpython · GitHub | Latest TMZ Celebrity News & Gossip | Watch TMZ Live
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Invalid error messages after GH-134077 #135422

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Invalid error messages after GH-134077#135422
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sobolevn
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3.15new features, bugs and security fixesinterpreter-core(Objects, Python, Grammar, and Parser dirs)topic-parsertype-bugAn unexpected behavior, bug, or error
@sobolevn

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@sobolevn
sobolevn
opened on Jun 12, 2025

Bug report

In #134036 (PR: #134077) I broke this use-case:

# ex.py
raise AssertionError() from None

print(1,,2)

Running ./python.exe ex.py on it produces:

» ./python.exe ex.py
  File "/Users/sobolev/Desktop/cpython/ex.py", line 1
    raise AssertionError() from None
                           ^^^^
SyntaxError: did you forget an expression after 'from'?

Which is not correct. I am fixing it right now, sorry! :(

CC @pablogsal @lysnikolaou

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3.15new features, bugs and security fixesinterpreter-core(Objects, Python, Grammar, and Parser dirs)topic-parsertype-bugAn unexpected behavior, bug, or error

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