This provides clearer synchronization invariants: if it occurs at all,
the call to c.Process.Kill always occurs before Wait returns. It also
allows any unexpected errors from the goroutine to be propagated back
to Wait.
For #50436.
Change-Id: I7ddadc73e6e67399596e35393f5845646f6111ab
Reviewed-on: https://go-review.googlesource.com/c/go/+/401896
TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Bryan Mills <bcmills@google.com>
Run-TryBot: Bryan Mills <bcmills@google.com> Reviewed-by: Ian Lance Taylor <iant@golang.org>