(sigchld_handler, status_message): Handle a NULL in sys_siglist.

1 files changed, 23 insertions, 4 deletions

diff --git a/src/process.c b/src/process.c
index c2785e75fc9..25b0ef2c22c 100644
--- a/src/process.c
+++ b/src/process.c
@@ -308,11 +308,18 @@ status_message (status)
 
   if (EQ (symbol, Qsignal) || EQ (symbol, Qstop))
     {
+      char *signame = 0;
+      if (code < NSIG)
+        {
 #ifndef VMS
-      string = build_string (code < NSIG ? sys_siglist[code] : "unknown");
+          signame = sys_siglist[code];
 #else
-      string = build_string (code < NSIG ? sys_errlist[code] : "unknown");
+          signame = sys_errlist[code];
 #endif
+        }
+      if (signame == 0)
+        signame = "unknown";
+      string = build_string (signame);
       string2 = build_string (coredump ? " (core dumped)\n" : "\n");
       XSTRING (string)->data[0] = DOWNCASE (XSTRING (string)->data[0]);
       return concat2 (string, string2);
@@ -2827,11 +2834,23 @@ sigchld_handler (signo)
           if (WIFEXITED (w))
             synch_process_retcode = WRETCODE (w);
           else if (WIFSIGNALED (w))
+            {
+              int code = WTERMSIG (w);
+              char *signame = 0;
+
+              if (code < NSIG)
+                {
 #ifndef VMS
-            synch_process_death = (char *) sys_siglist[WTERMSIG (w)];
+                  signame = sys_siglist[code];
 #else
-            synch_process_death = sys_errlist[WTERMSIG (w)];
+                  signame = sys_errlist[code];
 #endif
+                }
+              if (signame == 0)
+                signame = "unknown";
+
+              synch_process_death = signame;
+            }
 
           /* Tell wait_reading_process_input that it needs to wake up and
              look around.  */