Bug #55078 valgrind errors in after group_concat_key_cmp_with_distinct

• Submitted: 8 Jul 2010 12:37
• Modified: 11 Feb 2011 7:07
• Reporter: Shane Bester (Platinum Quality Contributor)
• Status: Can't repeat
• Category: MySQL Server: Optimizer
• Severity: S1 (Critical)
• Version: 5.5.5-debug
• OS: Any
• CPU Architecture: Any

[8 Jul 2010 12:37] Shane Bester

Description:
valgrind errors in 5.5.5-debug:

Invalid read of size 1
at: String::append(String const&) (sql_string.cc:349)
by: dump_leaf_key (item_sum.cc:2952)
by: tree_walk_left_root_right (tree.c:541)
by: tree_walk_left_root_right (tree.c:546)
by: tree_walk_left_root_right (tree.c:541)
by: tree_walk (tree.c:529)
by: Item_func_group_concat::val_str (item_sum.cc:3393)
by: Item::save_in_field (item.cc:5417)
by: Item_result_field::save_in_result_field (item.h:2375)
by: copy_sum_funcs (sql_select.cc:15952)
by: end_write_group (sql_select.cc:12892)
by: sub_select (sql_select.cc:11547)
by: do_select (sql_select.cc:11336)
by: JOIN::exec() (sql_select.cc:2107)
by: mysql_select (sql_select.cc:2549)
by: handle_select (sql_select.cc:290)
by: execute_sqlcom_select(sql_parse.cc:4882)
by: mysql_execute_command (sql_parse.cc:2329)
by: mysql_parse (sql_parse.cc:5911)
by: dispatch_command (sql_parse.cc:1135)
by: do_command (sql_parse.cc:807)
by: do_handle_one_connection (sql_connect.cc:1196)
by: handle_one_connection (sql_connect.cc:1135)
by: start_thread (in /lib64/libpthread-2.5.so)
by: clone (in /lib64/libc-2.5.so)

How to repeat:
will come later..

[8 Jul 2010 12:38] MySQL Verification Team

full outputs from valgrind

Attachment: bug55078_full_valgrind_output.txt (text/plain), 15.52 KiB.