[EXPERIMENT] Panic when the pretty-print/reparse check fails #79996
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@bors try |
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⌛ Trying commit 3029f8d7bf072ae8ac696ddb2e7d01c45883beb9 with merge 96712b9a8abbabb8c63280714e8aa1379bc76ea9... |
If we try to capture the `Vec<u8>` in `Option<Vec<u8>>`, we'll need to capture a `>` token which was 'unglued' from a `>>` token. The processing of unglueing a token for parsing purposes bypasses the usual capturing infrastructure, so we currently lose the trailing `>`. As a result, we fall back to the reparsed `TokenStream`, causing us to lose spans. This commit makes token capturing keep track of a trailing 'unglued' token. Note that we don't need to care about unglueing except at the end of the captured tokens - if we capture both the first and second unglued tokens, then we'll end up capturing the full 'glued' token, which already works correctly.
Opening for a Crater run. Most of the failures will probably be due to minor pretty-printer inconsistencies, but we might find some token collection bugs.
Aaron1011
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☔ The latest upstream changes (presumably #79472) made this pull request unmergeable. Please resolve the merge conflicts. |
bors
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The check was removed in #79472, so there's no longer any real need for this. |
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r? @ghost