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runtime: go runtime.GC() can cause segfault with -race builds [1.25 backport] #78086

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runtime: go runtime.GC() can cause segfault with -race builds [1.25 backport]#78086
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CherryPickApprovedUsed during the release process for point releasescompiler/runtimeIssues related to the Go compiler and/or runtime.
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Go1.25.9
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@gopherbot
gopherbot
opened on Mar 11, 2026

@prattmic requested issue #78059 to be considered for backport to the next 1.25 minor release.

@gopherbot Please backport to Go 1.25 and 1.26. This is a bug in TSAN that causes effectively random crashes in -race mode.

I'm going to attempt to modify racebuild to allow LLVM cherry-picks so we can cherry pick just the initialization fix so we don't have the risk of updating TSAN by 2 years in a minor release.

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