Issue #17313 has been reported by jeremyevans0 (Jeremy Evans).

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Bug #17313: Backport 9fb60672d55162a92ab7e97b000a7e277458aab1 to Ruby 2.7
https://bugs.ruby-lang.org/issues/17313

* Author: jeremyevans0 (Jeremy Evans)
* Status: Closed
* Priority: Normal
* Backport: 2.5: DONTNEED, 2.6: DONTNEED, 2.7: REQUIRED
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This is necessary to fix a bug when fiber and thread are GCed concurrently, and it's causing crashes in fiber tests on OpenBSD/sparc64, where the copy coroutine is used.



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