Don't use `parser` module if `symbol` doesn't exist as well.

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Don't use `parser` module if `symbol` doesn't exist as well. #2680

Closed aadsm closed 2 years ago

aadsm commented 2 years ago

Python 3.10 removed the parser and the symbol modules that were deprecated for a while now. There's a fallback implementation with markerlib for parser but we were not checking for the lack of the symbol module as well.

bigfootjon commented 2 years ago

This has been superseded by https://github.com/facebook/buck/pull/2697 / https://github.com/facebook/buck/pull/2696