Bug#29770 Two handlers are allowed to catch an error in an stored procedure.

Add test case.

mysql-test/r/sp.result

@@ -6578,6 +6578,22 @@ DROP PROCEDURE db28318_a.t1;
 DROP PROCEDURE db28318_b.t2;
 DROP DATABASE db28318_a;
 DROP DATABASE db28318_b;
+USE test;
+DROP TABLE IF EXISTS t1;
+DROP PROCEDURE IF EXISTS bug29770;
+CREATE TABLE t1(a int);
+CREATE PROCEDURE bug29770()
+BEGIN
+DECLARE CONTINUE HANDLER FOR SQLSTATE '42S22' SET @state:= 'run';
+DECLARE CONTINUE HANDLER FOR SQLEXCEPTION SET @exception:= 'run';
+SELECT x FROM t1;
+END|
+CALL bug29770();
+SELECT @state, @exception;
+@state	@exception
+run	NULL
+DROP TABLE t1;
+DROP PROCEDURE bug29770;
 # ------------------------------------------------------------------
 # -- End of 5.0 tests
 # ------------------------------------------------------------------

mysql-test/t/sp.test

@@ -7698,6 +7698,30 @@ DROP PROCEDURE db28318_a.t1;
 DROP PROCEDURE db28318_b.t2;
 DROP DATABASE db28318_a;
 DROP DATABASE db28318_b;
+USE test;
+
+#
+# Bug#29770 Two handlers are allowed to catch an error in an stored procedure.
+#
+
+--disable_warnings
+DROP TABLE IF EXISTS t1;
+DROP PROCEDURE IF EXISTS bug29770;
+--enable_warnings
+
+CREATE TABLE t1(a int);
+delimiter |;
+CREATE PROCEDURE bug29770()
+BEGIN
+  DECLARE CONTINUE HANDLER FOR SQLSTATE '42S22' SET @state:= 'run';
+  DECLARE CONTINUE HANDLER FOR SQLEXCEPTION SET @exception:= 'run';
+  SELECT x FROM t1;
+END|
+delimiter ;|
+CALL bug29770();
+SELECT @state, @exception;
+DROP TABLE t1;
+DROP PROCEDURE bug29770;
 
 
 --echo # ------------------------------------------------------------------