[issue34480] _markupbase.py fails with UnboundLocalError on invalid keyword in marked section

[Josh Kamdjou]

Change by Josh Kamdjou :


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keywords: +patch
pull_requests: +17250
stage: test needed -> patch review
pull_request: https://github.com/python/cpython/pull/17643

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[issue34480] _markupbase.py fails with UnboundLocalError on invalid keyword in marked section

[Josh Kamdjou]

Josh Kamdjou  added the comment:

(Author of PR https://github.com/python/cpython/pull/17643)

Since the behavior of self.error() is determined by the subclass 
implementation, an Exception is not guaranteed. How should this be handled? It 
seems the options are:

- continue execution, in which case 'match' needs to be defined (I proposed 
initialization to None, which results in returning -1 on the next line)
- return a value
- raise an Exception

Happy to update the PR with @xtreak's test cases.

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nosy: +jkamdjou

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