Stop reusing the Prism result for RuboCop for now#3672
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This was referenced Jul 18, 2025
KaanOzkan
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st0012
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RuboCop 1.80.1 contains a fix for why this was broken, so it should be safe to enable this again. Revert: Shopify#3672 Fix: rubocop/rubocop#14478
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RuboCop 1.80.1 contains a fix for why this was broken, so it should be safe to enable this again. Revert: Shopify#3672 Fix: rubocop/rubocop#14478
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RuboCop 1.80.1 contains a fix for why this was broken, so it should be safe to enable this again. Revert: Shopify#3672 Fix: rubocop/rubocop#14478
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RuboCop 1.80.1 contains a fix for why this was broken, so it should be safe to enable this again. Revert: #3672 Fix: rubocop/rubocop#14478
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Motivation
Related to #3657 and #3665. This PR "fixes" the issues by not reusing the Prism result anymore, but the real fix is on the RuboCop side.
Reusing the Prism parse result for RuboCop is a massive performance win as we avoid double-parsing the same document - both for computing diagnostics on every keypress and for formatting.
Unfortunately, we are receiving numerous reports of RuboCop crashing when the Prism result is reused, so I propose we turn this off while the RuboCop team investigates why the cops fail in this mode.
It might be easier to add some sort of experimental setting, so that people can find bugs. It seems like the problems are not related to running RuboCop in the CLI, where it sees all files in their final state, but in LSP mode when the user is in the middle of typing.