Bug #46075: Assertion failed: 0, file .\protocol.cc, line 416

In create_myisam_from_heap() mark all errors as fatal except 
HA_ERR_RECORD_FILE_FULL for a HEAP table.

Not doing so could lead to problems, e.g. in a case when a
temporary MyISAM table gets overrun due to its MAX_ROWS limit
while executing INSERT/REPLACE IGNORE ... SELECT. 
The SELECT execution was aborted, but the error was 
converted to a warning due to IGNORE clause, so neither 'ok' 
nor 'error' packet could be sent back to the client. This 
condition led to hanging client when using 5.0 server, or 
assertion failure in 5.1.

mysql-test/r/insert_select.result

@@ -842,3 +842,16 @@ Table	Op	Msg_type	Msg_text
 test.t2	check	status	OK
 drop table t1,t2;
 ##################################################################
+#
+# Bug #46075: Assertion failed: 0, file .\protocol.cc, line 416
+#
+CREATE TABLE t1(a INT);
+SET max_heap_table_size = 16384;
+SET @old_myisam_data_pointer_size = @@myisam_data_pointer_size;
+SET GLOBAL myisam_data_pointer_size = 2;
+INSERT INTO t1 VALUES (1), (2), (3), (4), (5);
+INSERT IGNORE INTO t1 SELECT t1.a FROM t1,t1 t2,t1 t3,t1 t4,t1 t5,t1 t6,t1 t7;
+ERROR HY000: The table '' is full
+SET GLOBAL myisam_data_pointer_size = @old_myisam_data_pointer_size;
+DROP TABLE t1;
+End of 5.0 tests

mysql-test/t/insert_select.test

@@ -397,3 +397,24 @@ check table t2 extended;
 drop table t1,t2;
 --echo ##################################################################
 
+--echo #
+--echo # Bug #46075: Assertion failed: 0, file .\protocol.cc, line 416
+--echo #
+
+CREATE TABLE t1(a INT);
+# To force MyISAM temp. table in the following INSERT ... SELECT.
+SET max_heap_table_size = 16384;
+# To overflow the temp. table.
+SET @old_myisam_data_pointer_size = @@myisam_data_pointer_size;
+SET GLOBAL myisam_data_pointer_size = 2;
+
+INSERT INTO t1 VALUES (1), (2), (3), (4), (5);
+
+--error ER_RECORD_FILE_FULL
+INSERT IGNORE INTO t1 SELECT t1.a FROM t1,t1 t2,t1 t3,t1 t4,t1 t5,t1 t6,t1 t7;
+
+# Cleanup
+SET GLOBAL myisam_data_pointer_size = @old_myisam_data_pointer_size;
+DROP TABLE t1;
+
+--echo End of 5.0 tests

sql/sql_select.cc

@@ -10276,6 +10276,11 @@ bool create_myisam_from_heap(THD *thd, TABLE *table, TMP_TABLE_PARAM *param,
 
   if (table->s->db_type != DB_TYPE_HEAP || error != HA_ERR_RECORD_FILE_FULL)
   {
+    /*
+      We don't want this error to be converted to a warning, e.g. in case of
+      INSERT IGNORE ... SELECT.
+    */
+    thd->is_fatal_error= 1;
     table->file->print_error(error,MYF(0));
     DBUG_RETURN(1);
   }