From 3cc635dabb0780914d51cdfad57912608196d099 Mon Sep 17 00:00:00 2001
From: Victor Stinner <victor.stinner@gmail.com>
Date: Thu, 9 Aug 2012 02:43:41 +0200
Subject: faulthandler: fix the handler of user signals

Restore the errno before calling the previous signal handler, and not after.
---
 Modules/faulthandler.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/Modules/faulthandler.c b/Modules/faulthandler.c
index 469e490..4aa9124 100644
--- a/Modules/faulthandler.c
+++ b/Modules/faulthandler.c
@@ -659,17 +659,22 @@ faulthandler_user(int signum)
 #ifdef HAVE_SIGACTION
     if (user->chain) {
         (void)sigaction(signum, &user->previous, NULL);
+        errno = save_errno;
+
         /* call the previous signal handler */
         raise(signum);
+
+        save_errno = errno;
         (void)faulthandler_register(signum, user->chain, NULL);
+        errno = save_errno;
     }
 #else
     if (user->chain) {
+        errno = save_errno;
         /* call the previous signal handler */
         user->previous(signum);
     }
 #endif
-    errno = save_errno;
 }
 
 static int
-- 
cgit v0.12