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Russ Cox 4534fdb144 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
2014-06-06 16:52:14 -04:00
api api: add go1.3.txt 2014-06-02 11:45:00 +09:00
doc doc: fix happens-before rules for buffered channels 2014-06-05 21:08:28 +04:00
include liblink: fix field tracking 2014-05-20 00:30:58 -04:00
lib codereview: do not add defaultcc for private CLs 2014-06-05 16:40:09 -04:00
misc cmd/cgo: for typedef of untagged struct, use typedef name in C code 2014-06-05 10:42:03 -07:00
src runtime: fix panic stack during runtime.Goexit during panic 2014-06-06 16:52:14 -04:00
test runtime: fix panic stack during runtime.Goexit during panic 2014-06-06 16:52:14 -04:00
.hgignore lib9: enable on Plan 9 2014-02-13 20:06:41 +01:00
.hgtags tag go1.3rc1 2014-06-02 14:43:51 +10:00
AUTHORS A+C: Pietro Gagliardi (individual CLA) 2014-05-21 16:01:41 -07:00
CONTRIBUTORS C: add another email of mine. 2014-05-31 01:55:11 -07:00
LICENSE doc: update licensing text one more time 2012-03-27 15:09:13 +11:00
PATENTS
README README: Fix installation instructions 2013-11-20 13:47:37 -08:00
favicon.ico godoc: update favicon 2012-10-11 17:02:36 +11:00
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README

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