LP:848901 - Assertion `fabs(cur_isc->x-m_cur_intersection->x) + fabs(cur_isc->y-m_cur_intersection->y) < 0.000000000001' failed in Gcalc_scan_iterator::intersection_scan() in maria-5.3-gis

int Gcalc_scan_iterator::intersection_scan(): Assertion `fabs(cur_isc->x-m_cur_intersection->x) + fabs(cur_isc->y-m_cur_intersection->y) < 0.000000000001' failed.

1. 2011-09-13T14:48:17 #8 0x006b0d98 in __assert_fail () from /lib/libc.so.6
2. 2011-09-13T14:48:17 #9 0x0836633e in Gcalc_scan_iterator::intersection_scan (this=0x956818b4) at gcalc_slicescan.cc:951
3. 2011-09-13T14:48:17 #10 0x0825f3df in Gcalc_scan_iterator::step (this=0x956818b4) at gcalc_slicescan.h:338
4. 2011-09-13T14:48:17 #11 0x08368e29 in Gcalc_operation_reducer::count_all (this=0xa14ea68, hp=0xa14e914) at gcalc_tools.cc:1074
5. 2011-09-13T14:48:17 #12 0x0825d817 in Item_func_buffer::val_str (this=0xa14e890, str_value=0xa14ee00) at item_geofunc.cc:1483
6. 2011-09-13T14:48:17 #13 0x0825c0a6 in Item_func_spatial_operation::val_str (this=0xa14ebc8, str_value=0xa14f150) at item_geofunc.cc:1011
7. 2011-09-13T14:48:17 #14 0x0825c0a6 in Item_func_spatial_operation::val_str (this=0xa14ef18, str_value=0xa14ff90) at item_geofunc.cc:1011
8. 2011-09-13T14:48:17 #15 0x0825c074 in Item_func_spatial_operation::val_str (this=0xa14fd70, str_value=0xa150810) at item_geofunc.cc:1010
9. 2011-09-13T14:48:17 #16 0x0825c074 in Item_func_spatial_operation::val_str (this=0xa1505f0, str_value=0x95681c60) at item_geofunc.cc:1010
10. 2011-09-13T14:48:17 #17 0x08259793 in Item_func_as_wkt::val_str (this=0xa150520, str=0x95682060) at item_geofunc.cc:123
11. 2011-09-13T14:48:17 #18 0x081dbb81 in Item::send (this=0xa150520, protocol=0xa133454, buffer=0x95682060) at item.cc:5905
12. 2011-09-13T14:48:17 #19 0x08289528 in select_send::send_data (this=0xa1509b0, items=...) at sql_class.cc:1919
13. 2011-09-13T14:48:17 #20 0x08326378 in JOIN::exec (this=0xa1525d8) at sql_select.cc:2069
14. 2011-09-13T14:48:17 #21 0x08328d94 in mysql_select (thd=0xa133128, rref_pointer_array=0xa134c40, tables=0x0, wild_num=0, fields=..., conds=0x0, og_num=0, order=0x0, group=0x0,
15. 2011-09-13T14:48:17 having=0x0, proc_param=0x0, select_options=2147764736, result=0xa1509b0, unit=0xa134844, select_lex=0xa134b20) at sql_select.cc:2885
16. 2011-09-13T14:48:17 #22 0x08320c5f in handle_select (thd=0xa133128, lex=0xa1347e8, result=0xa1509b0, setup_tables_done_option=0) at sql_select.cc:283
17. 2011-09-13T14:48:17 #23 0x082bc38f in execute_sqlcom_select (thd=0xa133128, all_tables=0x0) at sql_parse.cc:5082
18. 2011-09-13T14:48:17 #24 0x082b3193 in mysql_execute_command (thd=0xa133128) at sql_parse.cc:2227
19. 2011-09-13T14:48:17 #25 0x082be9cb in mysql_parse (thd=0xa133128,
20. 2011-09-13T14:48:17 rawbuf=0xa13e950 "SELECT ASTEXT( ST_SYMDIFFERENCE( ST_SYMDIFFERENCE( ST_INTERSECTION( MULTILINESTRINGFROMTEXT(' MULTILINESTRING( ( 6 4 , 3 7 , 9 4 , 3 8 ) , ( 2 2 , 2 9 , 1 2 , 9 8 ) ) ') , ST_SYMDIFFERENCE( MULTIPOINTFROMTEXT(' MULTIPOINT( 6 1 , 3 8 , 3 3 , 0 6 , 7 2 , 3 4 ) ') , ST_BUFFER( ST_UNION( MULTIPOLYGONFROMTEXT(' MULTIPOLYGON( ( ( 2 2 , 6 2 , 1 3 , 2 2 , 2 2 ) ) ) ') , GEOMETRYFROMTEXT(' MULTILINESTRING( ( 1 4 , 9 9 , 3 0 , 6 6 ) , ( 3 5 , 1 0 , 5 8 , 6 1 ) , ( 8 9 , 6 1 , 5 1 , 6 2 ) , ( 2 2 , 7 5 , 5 8 , 6 9 , 3 0 ) , ( 8 0 , 8 4 , 6 7 , 5 5 ) ) ') ) , NUMPOINTS( EXTERIORRING( POLYGONFROMTEXT(' POLYGON( ( 0 0 , 2 1 , 8 2 , 0 0 ) ) ') ) ) ) ) ) , ST_INTERSECTION( POLYGONFROMTEXT(' POLYGON( ( 2 3 5 7 , 3 7 , 4 1 , 0 5 ) ) ') , MULTILINESTRINGFROMTEXT(' MULTILINESTRING( ( 2 3 , 1 4 , 6 4 , 9 1 , 3 4 , 1 8 ) , ( 9 9 , 0 3 , 1 7 , 9 9 ) ) ') ) ) , POLYGONFROMTEXT(' POLYGON( ( 1 3 7 2 , 1 5 , 3 8 , 5 0 ) ) ') ) )", length=930, found_semicolon=0x95683228) at sql_parse.cc:6083
21. 2011-09-13T14:48:17 #26 0x082b0e2f in dispatch_command (command=COM_QUERY, thd=0xa133128, packet=0xa135669 "", packet_length=930) at sql_parse.cc:1206
22. 2011-09-13T14:48:17 #27 0x082b02b5 in do_command (thd=0xa133128) at sql_parse.cc:904
23. 2011-09-13T14:48:17 #28 0x082ad330 in handle_one_connection (arg=0xa133128) at sql_connect.cc:1177
24. 2011-09-13T14:48:17 #29 0x00821919 in start_thread () from /lib/libpthread.so.0
25. 2011-09-13T14:48:17 #30 0x0076acce in clone () from /lib/libc.so.6
26. 2011-09-13T14:48:17 #5 0x0043a424 in __kernel_vsyscall ()

test case

SELECT ASTEXT( ST_SYMDIFFERENCE ( ST_SYMDIFFERENCE ( ST_INTERSECTION ( MULTILINESTRINGFROMTEXT( ' MULTILINESTRING( ( 6 4 , 3 7 , 9 4 , 3 8 ) , ( 2 2 , 2 9 , 1 2 , 9 8 ) ) ' ) , ST_SYMDIFFERENCE ( MULTIPOINTFROMTEXT( ' MULTIPOINT( 6 1 , 3 8 , 3 3 , 0 6 , 7 2 , 3 4 ) ' ) , ST_BUFFER ( ST_UNION ( MULTIPOLYGONFROMTEXT( ' MULTIPOLYGON( ( ( 2 2 , 6 2 , 1 3 , 2 2 , 2 2 ) ) ) ' ) , GEOMETRYFROMTEXT( ' MULTILINESTRING( ( 1 4 , 9 9 , 3 0 , 6 6 ) , ( 3 5 , 1 0 , 5 8 , 6 1 ) , ( 8 9 , 6 1 , 5 1 , 6 2 ) , ( 2 2 , 7 5 , 5 8 , 6 9 , 3 0 ) , ( 8 0 , 8 4 , 6 7 , 5 5 ) ) ' ) ) , NUMPOINTS( EXTERIORRING( POLYGONFROMTEXT( ' POLYGON( ( 0 0 , 2 1 , 8 2 , 0 0 ) ) ' ) ) ) ) ) ) , ST_INTERSECTION ( POLYGONFROMTEXT( ' POLYGON( ( 2 3 5 7 , 3 7 , 4 1 , 0 5 ) ) ' ) , MULTILINESTRINGFROMTEXT( ' MULTILINESTRING( ( 2 3 , 1 4 , 6 4 , 9 1 , 3 4 , 1 8 ) , ( 9 9 , 0 3 , 1 7 , 9 9 ) ) ' ) ) ) , POLYGONFROMTEXT( ' POLYGON( ( 1 3 7 2 , 1 5 , 3 8 , 5 0 ) ) ' ) ) ) ;