diff -Nur ../bash-4.2.orig/sig.c ./sig.c
--- ../bash-4.2.orig/sig.c	2013-01-20 11:44:12.182866784 -0800
+++ ./sig.c	2013-01-20 12:32:21.687781408 -0800
@@ -674,6 +674,17 @@
   if (sig == SIGCHLD)
     act.sa_flags |= SA_RESTART;		/* XXX */
 
+  if (sig == SIGCHLD)
+  {
+    fprintf (stderr, "set_signal_handler SIGCHLD\n"
+    "\tsa_flags = %#x\n"
+    "\tSA_RESTART = %#x\n"
+    "\tsa_flags & SA_RESTART = %#x\n",
+    act.sa_flags,
+    SA_RESTART,
+    act.sa_flags & SA_RESTART);
+  }
+    
   sigemptyset (&act.sa_mask);
   sigemptyset (&oact.sa_mask);
   sigaction (sig, &act, &oact);