From: Arnaud Giersch <arnaud.giersch@univ-fcomte.fr>
Date: Wed, 30 Aug 2017 12:41:47 +0000 (+0200)
Subject: Don't mess ev->ap (allows multiple %m in layout).
X-Git-Tag: v3_17~184
X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/commitdiff_plain/8d387cbb31720448e982bcde84a1ba1e51830470

Don't mess ev->ap (allows multiple %m in layout).
---

diff --git a/src/xbt/xbt_log_layout_format.c b/src/xbt/xbt_log_layout_format.c
index 18c55ac2ce..7c41b5b706 100644
--- a/src/xbt/xbt_log_layout_format.c
+++ b/src/xbt/xbt_log_layout_format.c
@@ -153,7 +153,10 @@ static int xbt_log_layout_format_doit(xbt_log_layout_t l, xbt_log_event_t ev, co
       case 'm': {               /* user-provided message; LOG4J compliant */
         int sz;
         set_sz_from_precision();
-        int len = vsnprintf(p, sz, msg_fmt, ev->ap);
+        va_list ap;
+        va_copy(ap, ev->ap);
+        int len = vsnprintf(p, sz, msg_fmt, ap);
+        va_end(ap);
         check_overflow(MIN(sz, len));
         break;
       }