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Russ Cox authored
««« CL 102220043 / 00224712f89e runtime: fix panic stack during runtime.Goexit during panic A runtime.Goexit during a panic-invoked deferred call left the panic stack intact even though all the stack frames are gone when the goroutine is torn down. The next goroutine to reuse that struct will have a bogus panic stack and can cause the traceback routines to walk into garbage. Most likely to happen during tests, because t.Fatal might be called during a deferred func and uses runtime.Goexit. This "not enough cleared in Goexit" failure mode has happened to us multiple times now. Clear all the pointers that don't make sense to keep, not just gp->panic. Fixes #8158. LGTM=iant, dvyukov R=iant, dvyukov CC=golang-codereviews https://golang.org/cl/102220043 »»» LGTM=iant R=golang-codereviews, iant CC=golang-codereviews, r https://golang.org/cl/108780044
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