Safe guard in case of imporper data is provided to elog()

in multi-byte build.

diff --git a/src/backend/utils/error/elog.c b/src/backend/utils/error/elog.c
index 2434f4d21970110455e9dddbebd33de621c499b0..c19ad44d63b20d3d2623b2344144060a3fabe3ea 100644 (file)
--- a/src/backend/utils/error/elog.c
+++ b/src/backend/utils/error/elog.c
@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *       $Header: /cvsroot/pgsql/src/backend/utils/error/elog.c,v 1.80 2001/01/24 19:43:15 momjian Exp $
+ *       $Header: /cvsroot/pgsql/src/backend/utils/error/elog.c,v 1.81 2001/02/21 06:05:23 ishii Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -683,6 +683,8 @@ write_syslog(int level, const char *line)
 #ifdef MULTIBYTE
                        /* trim to multibyte letter boundary */ 
                        buflen = pg_mbcliplen(buf, l, l);
+                       if (buflen <= 0)
+                           return;
                        buf[buflen] = '\0';
                        l = strlen(buf);
 #endif