Fixed BUG#9856: Stored procedures: crash if handler for sqlexception, not found.

mysql-test/r/sp.result:
  Added test case for BUG#6129.
mysql-test/t/sp.test:
  Added test case for BUG#6129.
sql/sp_pcontext.h:
  Only need one handler counter.
sql/sql_yacc.yy:
  Count handlers correctly.

mysql-test/r/sp.result

@@ -2862,4 +2862,22 @@ call bug6129(@@sql_mode)|
 @@sql_mode = mode
 0
 drop procedure bug6129|
+drop procedure if exists bug9856|
+create procedure bug9856()
+begin
+declare v int;
+declare c cursor for select data from t1;
+declare exit handler for sqlexception, not found select '16';
+open c;
+fetch c into v;
+select v;
+end|
+delete from t1|
+call bug9856()|
+16
+16
+call bug9856()|
+16
+16
+drop procedure bug9856|
 drop table t1,t2;

mysql-test/t/sp.test

@@ -3514,6 +3514,29 @@ call bug6129(@@sql_mode)|
 drop procedure bug6129|
 
 
+#
+# BUG#9856: Stored procedures: crash if handler for sqlexception, not found
+#
+--disable_warnings
+drop procedure if exists bug9856|
+--enable_warnings
+create procedure bug9856()
+begin
+  declare v int;
+  declare c cursor for select data from t1;
+  declare exit handler for sqlexception, not found select '16';
+
+  open c;
+  fetch c into v;
+  select v;
+end|
+
+delete from t1|
+call bug9856()|
+call bug9856()|
+drop procedure bug9856|
+
+
 #
 # BUG#NNNN: New bug synopsis
 #

sql/sp_pcontext.h

@@ -235,12 +235,6 @@ class sp_pcontext : public Sql_alloc
   // Handlers
   //
 
-  inline void
-  add_handler()
-  {
-    m_handlers+= 1;
-  }
-
   inline void
   push_handler(sp_cond_type_t *cond)
   {
@@ -257,7 +251,7 @@ class sp_pcontext : public Sql_alloc
   }
 
   inline void
-  push_handlers(uint n)
+  add_handlers(uint n)
   {
     m_handlers+= n;
   }

sql/sql_yacc.yy

@@ -1681,7 +1681,6 @@ sp_decl:
 
 	    sp->add_instr(i);
 	    sp->push_backpatch(i, ctx->push_label((char *)"", 0));
-	    ctx->add_handler();
 	    sp->m_in_handler= TRUE;
 	  }
 	  sp_hcond_list sp_proc_stmt
@@ -1709,6 +1708,7 @@ sp_decl:
 	    sp->m_in_handler= FALSE;
 	    $$.vars= $$.conds= $$.curs= 0;
 	    $$.hndlrs= $6;
+	    ctx->add_handlers($6);
 	  }
 	| DECLARE_SYM ident CURSOR_SYM FOR_SYM sp_cursor_stmt
 	  {