Merge mysql.com:/home/hf/work/30286/my50-30286

into  mysql.com:/home/hf/work/30286/my51-30286

mysql-test/r/gis.result

@@ -736,6 +736,12 @@ SELECT * FROM t1;
 a
 NULL
 DROP TABLE t1;
+CREATE TABLE `t1` ( `col9` set('a'), `col89` date);
+INSERT INTO `t1` VALUES ('','0000-00-00');
+select geomfromtext(col9,col89) as a from t1;
+a
+NULL
+DROP TABLE t1;
 End of 4.1 tests
 create table t1 (s1 geometry not null,s2 char(100));
 create trigger t1_bu before update on t1 for each row set new.s1 = null;

mysql-test/t/gis.test

@@ -432,6 +432,14 @@ INSERT INTO t1 VALUES (NULL);
 SELECT * FROM t1;
 DROP TABLE t1;
 
+#
+# Bug #30955 geomfromtext() crasher
+#
+CREATE TABLE `t1` ( `col9` set('a'), `col89` date);
+INSERT INTO `t1` VALUES ('','0000-00-00');
+select geomfromtext(col9,col89) as a from t1;
+DROP TABLE t1;
+
 --echo End of 4.1 tests
 
 #

sql/gstream.cc

@@ -44,7 +44,7 @@ bool Gis_read_stream::get_next_word(LEX_STRING *res)
   skip_space();
   res->str= (char*) m_cur;
   /* The following will also test for \0 */
-  if (!my_isvar_start(&my_charset_bin, *m_cur))
+  if ((m_cur >= m_limit) || !my_isvar_start(&my_charset_bin, *m_cur))
     return 1;
 
   /*