[issue16504] IDLE - fatal error when opening a file with certain tokenizing errors

[Roger Serwy]

Roger Serwy added the comment:

I encountered this behavior while testing an extension that highlights tabs and trailing whitespace. The very first test file I wrote caused this crash. See the attached "sample_token_error.py".

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Added file: http://bugs.python.org/file28031/sample_token_error.py

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