Commit 5353fd50 authored by Ben Gamari's avatar Ben Gamari 🐢

compiler: Fix recompilation checking

In ticket #18733 we noticed a rather serious deficiency in the current
fingerprinting logic for recursive groups. I have described the old
fingerprinting story and its problems in Note [Fingerprinting recursive
groups] and have reworked the story accordingly to avoid these issues.

Fixes #18733.
parent 787e93ae
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