commit bash-20180921 snapshot

sig.c

@@ -574,6 +574,7 @@ termsig_handler (sig)
 #if defined (JOB_CONTROL)
   if (sig == SIGHUP && (interactive || (subshell_environment & (SUBSHELL_COMSUB|SUBSHELL_PROCSUB))))
     hangup_all_jobs ();
+
   if ((subshell_environment & (SUBSHELL_COMSUB|SUBSHELL_PROCSUB)) == 0)
     end_job_control ();
 #endif /* JOB_CONTROL */
@@ -598,6 +599,8 @@ termsig_handler (sig)
   if (dollar_dollar_pid != 1)
     exit (128+sig);		/* just in case the kill fails? */
 
+  /* We get here only under extraordinary circumstances. */
+
   /* We are PID 1, and the kill above failed to kill the process. We assume
      this means that we are running as an init process in a pid namespace
      on Linux. In this case, we can't send ourselves a fatal signal, so we