Fixed BUG#18787: Server crashed when calling a stored procedure containing

a misnamed function
  ... in the presence of a continue handler. The problem was that with a
  handler, it continued to execute as if function existed and had set a
  useful return value (which it hadn't).
  The fix is to set a null return value and do an error return when a function
  wasn't found.

mysql-test/r/sp.result

@@ -4837,4 +4837,14 @@ c	2
 b	3
 a	1
 delete from t1|
+drop procedure if exists bug18787|
+create procedure bug18787()
+begin
+declare continue handler for sqlexception begin end;
+select no_such_function();
+end|
+call bug18787()|
+no_such_function()
+NULL
+drop procedure bug18787|
 drop table t1,t2;

mysql-test/t/sp.test

@@ -5683,6 +5683,24 @@ select * from t1 order by @x|
 delete from t1|
 
 
+#
+# BUG#18787: Server crashed when calling a stored procedure containing
+#            a misnamed function
+#
+--disable_warnings
+drop procedure if exists bug18787|
+--enable_warnings
+create procedure bug18787()
+begin
+  declare continue handler for sqlexception begin end;
+
+  select no_such_function();
+end|
+
+call bug18787()|
+drop procedure bug18787|
+
+
 #
 # BUG#NNNN: New bug synopsis
 #

sql/item_func.cc

@@ -4722,7 +4722,9 @@ Item_func_sp::sp_result_field(void) const
     share->table_cache_key = empty_name;
     share->table_name = empty_name;
   }
-  field= m_sp->create_result_field(max_length, name, dummy_table);
+  if (!(field= m_sp->create_result_field(max_length, name, dummy_table)))
+    my_message(ER_OUT_OF_RESOURCES, ER(ER_OUT_OF_RESOURCES), MYF(0));
+
   DBUG_RETURN(field);
 }
 
@@ -4750,8 +4752,9 @@ Item_func_sp::execute(Field **flp)
   {
     if (!(*flp= f= sp_result_field()))
     {
-      my_message(ER_OUT_OF_RESOURCES, ER(ER_OUT_OF_RESOURCES), MYF(0));
+      /* Error set by sp_result_field() */
-      return 0;
+      null_value= 1;
+      return TRUE;
     }
 
     f->move_field((f->pack_length() > sizeof(result_buf)) ?
@@ -4915,6 +4918,9 @@ Item_func_sp::tmp_table_field(TABLE *t_arg)
   if (!res) 
     res= Item_func::tmp_table_field(t_arg);
 
+  if (!res)
+    my_message(ER_OUT_OF_RESOURCES, ER(ER_OUT_OF_RESOURCES), MYF(0));
+
   DBUG_RETURN(res);
 }