Accepting SIGURG signals could cause SIGURG to take up the entire
channel buffer.
Enhance the stability of test cases by:
1. Stop accepting the SIGURG signal by adding ‘Reset(sys call.SIGURG)’
2. Close the c1 chan by adding ‘defer Stop(c1)’ (Another bug, NOT this bug)
Fixes #49724
Change-Id: I909a9993f0f6dd109c15e48a861683b87dfc4ab3
Reviewed-on: https://go-review.googlesource.com/c/go/+/366514 Reviewed-by: Ian Lance Taylor <iant@golang.org> Reviewed-by: Bryan C. Mills <bcmills@google.com>
Trust: Bryan C. Mills <bcmills@google.com>