Index: TestCases/Linux/signal_segv_handler.cc
===================================================================
--- TestCases/Linux/signal_segv_handler.cc
+++ TestCases/Linux/signal_segv_handler.cc
@@ -13,12 +13,11 @@
 // "benign" SEGVs that are handled by signal handler, and ensures that
 // the process survive.
 
-// REQUIRES: disabled
-
 #include <stdio.h>
 #include <stdlib.h>
 #include <signal.h>
 #include <sys/mman.h>
+#include <string.h>
 
 void *guard;
 
@@ -28,6 +27,8 @@
 
 int main() {
   struct sigaction a, old;
+  memset(&a, 0, sizeof(a));
+  memset(&old, 0, sizeof(old));
   a.sa_sigaction = handler;
   a.sa_flags = SA_SIGINFO;
   sigaction(SIGSEGV, &a, &old);