Crash in Field::eq in maria-5.3 with derived_merge=on

[Philip Stoev]

Not reproducible with rev 3053, so must be a recent regression. Explain also crashes. Not repeatable with derived_merge=off.

backtrace:

#4 <signal handler called>
#5 0x082752a0 in Field::eq (this=0xae62fd70, field=0x0) at field.h:243
#6 0x083e1efc in matching_cond (max_fl=true, ref=0xae89ef34, keyinfo=0xae62fdd8, field_part=0xae62fe18, cond=0xae5148d0, key_part_used=0xae89e2a4,
    range_fl=0xae89ef7c, prefix_len=0xae89ef78) at opt_sum.cc:703
#7 0x083e259d in find_key_for_maxmin (max_fl=true, ref=0xae89ef34, field=0xae62fd70, cond=0xae5148d0, range_fl=0xae89ef7c, prefix_len=0xae89ef78)
    at opt_sum.cc:890
#8 0x083e1498 in opt_sum_query (thd=0x9579680, tables=..., all_fields=..., conds=0xae5148d0) at opt_sum.cc:387
#9 0x0831806d in JOIN::optimize (this=0xae521360) at sql_select.cc:1044
#10 0x0831e133 in mysql_select (thd=0x9579680, rref_pointer_array=0x957b198, tables=0xae513e30, wild_num=0, fields=..., conds=0xae514190, og_num=0,
    order=0x0, group=0x0, having=0x0, proc_param=0x0, select_options=2147764736, result=0xae5142f8, unit=0x957ad9c, select_lex=0x957b078)
    at sql_select.cc:2871
#11 0x08316083 in handle_select (thd=0x9579680, lex=0x957ad40, result=0xae5142f8, setup_tables_done_option=0) at sql_select.cc:283
#12 0x082b17b3 in execute_sqlcom_select (thd=0x9579680, all_tables=0xae513e30) at sql_parse.cc:5082
#13 0x082a85b7 in mysql_execute_command (thd=0x9579680) at sql_parse.cc:2227
#14 0x082b3def in mysql_parse (thd=0x9579680, rawbuf=0xae512eb0 "SELECT MAX( f1 ) FROM ( SELECT * FROM t1 ) AS alias1 WHERE f1 = 100", length=67,
    found_semicolon=0xae8a0228) at sql_parse.cc:6083
#15 0x082a6253 in dispatch_command (command=COM_QUERY, thd=0x9579680,
    packet=0x95d41c9 "SELECT MAX( f1 ) FROM ( SELECT * FROM t1 ) AS alias1 WHERE f1 = 100", packet_length=67) at sql_parse.cc:1206
#16 0x082a56d9 in do_command (thd=0x9579680) at sql_parse.cc:904
#17 0x082a2754 in handle_one_connection (arg=0x9579680) at sql_connect.cc:1177
#18 0x00821919 in start_thread () from /lib/libpthread.so.0
#19 0x0076acce in clone () from /lib/libc.so.6

test case:

CREATE TABLE t1 ( f1 int NOT NULL , PRIMARY KEY (f1) ) ;
INSERT INTO t1 VALUES (1), (2);
SELECT MAX( f1 ) FROM ( SELECT * FROM t1 ) AS alias1 WHERE f1 = 100;

[Philip Stoev (pstoev-askmonty)]

 bzr version-info
revision-id: <email address hidden>
date: 2011-06-21 18:17:28 -0700
build-date: 2011-06-22 09:50:17 +0300
revno: 3054
branch-nick: maria-5.3