diff options
Diffstat (limited to 'sql/sql_class.cc')
| -rw-r--r-- | sql/sql_class.cc | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/sql/sql_class.cc b/sql/sql_class.cc index 0a8c136e556..488424d5da5 100644 --- a/sql/sql_class.cc +++ b/sql/sql_class.cc @@ -4548,7 +4548,8 @@ extern "C" size_t thd_query_safe(MYSQL_THD thd, char *buf, size_t buflen) if (!mysql_mutex_trylock(&thd->LOCK_thd_data)) { len= MY_MIN(buflen - 1, thd->query_length()); - memcpy(buf, thd->query(), len); + if (len) + memcpy(buf, thd->query(), len); mysql_mutex_unlock(&thd->LOCK_thd_data); } buf[len]= '\0'; |