Toilal / rebulk / 28319864212

96%

master: 97%

Pull #51

github

fix(match): make Match.__hash__ independent of the mutable value

Match.__hash__ mixed in self.value, which has a public setter (and is set
during pattern processing), so a Match placed in a set/dict and then mutated
became unfindable -- a broken hash/eq contract. Hash on the span only (a
subset of the __eq__ fields, so equal matches still share a hash); same-span
matches with different values now collide harmlessly and __eq__ separates
them. Adds a regression test that mutates value while the match sits in a set.

Closes #34

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

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