bpo-36734: Fix compilation of faulthandler.c on HP-UX (GH-12970)

Initialize "stack_t current_stack" to zero using memset().
(cherry picked from commit b84cb70880a0acfcbbaca7bcda405af08f94d269)

Co-authored-by: Victor Stinner <vstinner@redhat.com>

diff --git a/Misc/NEWS.d/next/Library/2019-04-26-17-14-20.bpo-36734.p2MaiN.rst b/Misc/NEWS.d/next/Library/2019-04-26-17-14-20.bpo-36734.p2MaiN.rst
new file mode 100644 (file)
index 0000000..0934199
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2019-04-26-17-14-20.bpo-36734.p2MaiN.rst
@@ -0,0 +1,2 @@
+Fix compilation of ``faulthandler.c`` on HP-UX. Initialize ``stack_t
+current_stack`` to zero using ``memset()``.

diff --git a/Modules/faulthandler.c b/Modules/faulthandler.c
index cf24c9b2b9ad58375137b25babe6e23b074d3339..ec5192832ce05a9c168ee4edeec6163c2ed622fa 100644 (file)
--- a/Modules/faulthandler.c
+++ b/Modules/faulthandler.c
@@ -1369,7 +1369,8 @@ void _PyFaulthandler_Fini(void)
 #ifdef HAVE_SIGALTSTACK
     if (stack.ss_sp != NULL) {
         /* Fetch the current alt stack */
-        stack_t current_stack = {};
+        stack_t current_stack;
+        memset(&current_stack, 0, sizeof(current_stack));
         if (sigaltstack(NULL, &current_stack) == 0) {
             if (current_stack.ss_sp == stack.ss_sp) {
                 /* The current alt stack is the one that we installed.