Bug #51590 mysqltest: --disable_abort_on_error does not work inside while/if

abort_on_error flag for stmt was set at initial parse
(Re)-set flag before execution instead, also added to test

client/mysqltest.cc

@@ -7571,9 +7571,6 @@ void get_command_type(struct st_command* command)
          sizeof(saved_expected_errors));
   DBUG_PRINT("info", ("There are %d expected errors",
                       command->expected_errors.count));
-  command->abort_on_error= (command->expected_errors.count == 0 &&
-                            abort_on_error);
-
   DBUG_VOID_RETURN;
 }
 
@@ -7918,6 +7915,10 @@ int main(int argc, char **argv)
       command->type= Q_COMMENT;
     }
 
+    /* (Re-)set abort_on_error for this command */
+    command->abort_on_error= (command->expected_errors.count == 0 &&
+                              abort_on_error);
+    
     /* delimiter needs to be executed so we can continue to parse */
     my_bool ok_to_do= cur_block->ok || command->type == Q_DELIMITER;
     /*

mysql-test/r/mysqltest.result

@@ -325,6 +325,7 @@ outer=2 ifval=0
 outer=1 ifval=1
 here is the sourced script
 ERROR 42S02: Table 'test.nowhere' doesn't exist
+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 'else' at line 1
 
 In loop
 here is the sourced script

mysql-test/t/mysqltest.test

@@ -863,7 +863,7 @@ while ($outer)
 }
 
 # Test source in an if in a while which is false on 1st iteration
-# Also test --error in same context
+# Also test --error and --disable_abort_on_error in same context
 let $outer= 2; # Number of outer loops
 let $ifval= 0; # false 1st time
 while ($outer)
@@ -874,6 +874,10 @@ while ($outer)
     --source $MYSQLTEST_VARDIR/tmp/sourced.inc
     --error ER_NO_SUCH_TABLE
     SELECT * from nowhere;
+    --disable_abort_on_error
+# Statement giving a different error, to make sure we don't mask it
+    SELECT * FROM nowhere else;
+    --enable_abort_on_error
   }
   dec $outer;
   inc $ifval;