Backport fixes, version 12.2.0#8268
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cknitt merged 13 commits intomaintenance/12.xfrom Feb 27, 2026
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* Fix Parmatch crash on empty record head patterns * Simpler test
When pattern matching on untagged variants with both an Object case and a null/wildcard case, null (typeof "object") would incorrectly match the object branch. Emit a null check before the typeof switch when both conditions are present. Fixes #8251 Signed-Off-By: Cristiano Calcagno <cristiano.calcagno@gmail.com> Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
…ant switch (#8251) Arrays also have typeof "object", so when there's an ObjectType typeof case but no Array instanceof case, arrays would incorrectly match the object branch. Add an Array.isArray guard alongside the null guard. Also clean up the guard logic to use direct pattern matching instead of intermediate list building. Signed-Off-By: Cristiano Calcagno <cristiano.calcagno@gmail.com> Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
* Port Belt.Array's zip, zipBy, partition, unzip to Stdlib Array * Update completion test * Update CHANGELOG * Missed the PR link # Conflicts: # packages/@rescript/runtime/lib/es6/Stdlib_Array.js # packages/@rescript/runtime/lib/js/Stdlib_Array.js
fhammerschmidt
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Feb 27, 2026
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Release 12.2.0 with some more fixes and the licensing update from master.