* vm_trace.c (rb_suppress_tracing): Fix initialization of stack

allocated rb_trace_arg_t structure. Without this patch, sometimes
  INTERNAL_EVENT_GC would be skipped accidentally inside
  rb_threadptr_exec_event_hooks_orig().

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43987 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,10 @@
+Wed Dec  4 13:02:13 2013  Aman Gupta <ruby@tmm1.net>
+
+	* vm_trace.c (rb_suppress_tracing): Fix initialization of stack
+	  allocated rb_trace_arg_t structure. Without this patch, sometimes
+	  INTERNAL_EVENT_GC would be skipped accidentally inside
+	  rb_threadptr_exec_event_hooks_orig().
+
 Wed Dec  4 12:57:24 2013  Aman Gupta <ruby@tmm1.net>
 
 	* string.c (fstr_update_callback): Improve implementation in r43968

vm_trace.c

@@ -392,6 +392,7 @@ rb_suppress_tracing(VALUE (*func)(VALUE), VALUE arg)
     int state;
     const int tracing = th->trace_arg ? 1 : 0;
     rb_trace_arg_t dummy_trace_arg;
+    dummy_trace_arg.event = 0;
 
     if (!tracing) th->vm->trace_running++;
     if (!th->trace_arg) th->trace_arg = &dummy_trace_arg;