[Bug testsuite/20600] parallel testsuite hang in [nd_]syscall.exp

[dsmith at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=20600

--- Comment #3 from David Smith <dsmith at redhat dot com> ---
> I wonder if tcl/expect handles a child getting a SIGSEGV properly.

If I write a simple C program that looks like:

====
#include <sys/types.h>
#include <signal.h>
#include <unistd.h>

int
main()
{
        kill(getpid(), SIGSEGV);
        return 0;
}
====

and then do:

====
# tclsh
% catch { exec ./sigsegv }
1
====

That executes immediately, no hang.

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