Bug #12471 mysqltest, --error within loop affects wrong statement

 - Move clearing of expected errors

client/mysqltest.c

@@ -2385,8 +2385,6 @@ int read_query(struct st_query** q_ptr)
 	 sizeof(global_expected_errno));
   q->expected_errors= global_expected_errors;
   q->abort_on_error= (global_expected_errors == 0 && abort_on_error);
-  bzero((gptr) global_expected_errno, sizeof(global_expected_errno));
-  global_expected_errors=0;
   if (p[0] == '-' && p[1] == '-')
   {
     q->type= Q_COMMENT_WITH_COMMAND;
@@ -4002,6 +4000,16 @@ int main(int argc, char **argv)
     else
       check_eol_junk(q->last_argument);
 
+    if (q->type != Q_ERROR)
+    {
+      /*
+        As soon as any non "error" command has been executed,
+        the array with expected errors should be cleared
+      */
+      global_expected_errors= 0;
+      bzero((gptr) global_expected_errno, sizeof(global_expected_errno));
+    }
+
     parser.current_line += current_line_inc;
   }
 

mysql-test/r/mysqltest.result

@@ -341,3 +341,10 @@ mysqltest: At line 1: Wrong column number to replace_column in 'replace_column 1
 mysqltest: At line 1: Invalid integer argument "10!"
 mysqltest: At line 1: End of line junk detected: "!"
 mysqltest: At line 1: Invalid integer argument "a"
+failing_statement;
+ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'failing_statement' at line 1
+failing_statement;
+ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'failing_statement' at line 1
+SELECT 1 as a;
+a
+1

mysql-test/t/mysqltest.test

@@ -775,4 +775,17 @@ select "a" as col1, "c" as col2;
 # new scripts and diagnose errors
 # ----------------------------------------------------------------------------
 
+# ----------------------------------------------------------------------------
+# Test bug#12386
+# ----------------------------------------------------------------------------
+let $num= 2;
+while ($num)
+{
+   --error 1064
+   failing_statement;
+
+   dec $num;
+}
+
+SELECT 1 as a;