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In its final phase, the typechecker walks the types it produces to ensure that no unexpanded type instances leak through the API. However, this also walks shared types (such as those in the universe scope), resulting in a potential data race during concurrent typechecking passes. Fix this by being careful not to write if nothing needs to be changed. Since any shared types should already be sanitized, this should eliminate data races. For #44434 Change-Id: Iadb2e78863efe0e974e69a00e255f26cfaf9386a Reviewed-on: https://go-review.googlesource.com/c/go/+/294411 Trust: Robert Findley <rfindley@google.com> Trust: Robert Griesemer <gri@golang.org> Run-TryBot: Robert Findley <rfindley@google.com> Reviewed-by: Robert Griesemer <gri@golang.org> TryBot-Result: Go Bot <gobot@golang.org> |
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