(gdb) bt
#0  0x00000000004c74b2 in rbp_allocate ()
#1  0x00000000004c7723 in rbp_allocate ()
#2  0x00000000004cbe89 in pg_key_compare ()
#3  0x00000000004cc4b2 in pg_key_compare ()
#4  0x00000000005151bc in fun_ref_free ()
#5  0x000000000051571f in fun_ref_free ()
#6  0x00000000005174bc in fun_ref_free ()
#7  0x0000000000517815 in fun_ref_free ()
#8  0x000000000052ad02 in sql_tree_hash ()
#9  0x000000000052b2de in sql_tree_hash ()
#10 0x000000000052799f in sql_tree_hash ()
#11 0x0000000000528232 in sql_tree_hash ()
#12 0x00000000005284f7 in sql_tree_hash ()
#13 0x0000000000528fe6 in sql_tree_hash ()
#14 0x00000000005291b3 in sql_tree_hash ()
#15 0x000000000052934a in sql_tree_hash ()
#16 0x00000000005296f9 in sql_tree_hash ()
#17 0x000000000050ca95 in bif_sprintf_inverse ()
#18 0x000000000050f35d in fun_ref_free ()
#19 0x00000000004e956b in bif_exec ()
#20 0x0000000000542183 in distinct_comp_func ()
#21 0x0000000000546289 in subq_comp_func ()
#22 0x000000000056826c in insert_node_run ()
#23 0x000000000056a115 in lc_free ()
#24 0x0000000000544be2 in subq_comp_func ()
#25 0x0000000000546bbc in subq_comp_func ()
#26 0x000000000056cf62 in table_source_input ()
#27 0x000000000054429d in distinct_comp_func ()
#28 0x00000000004d9838 in subq_node_input ()
#29 0x000000000056a560 in fun_ref_node_input ()
#30 0x000000000054429d in distinct_comp_func ()
#31 0x00000000005445cb in subq_comp_func ()
#32 0x00000000005466d8 in subq_comp_func ()
#33 0x000000000056826c in insert_node_run ()
#34 0x000000000056a115 in lc_free ()
#35 0x0000000000544be2 in subq_comp_func ()
#36 0x0000000000546bbc in subq_comp_func ()
#37 0x000000000056826c in insert_node_run ()
#38 0x000000000056b7e4 in fun_ref_node_input ()

#39 0x000000000056c195 in fun_ref_node_input ()
#40 0x000000000044f104 in sch_key_fill_sub ()
---Type <return> to continue, or q <return> to quit---
#41 0x00000000005ea529 in sparp_gp_trav_find_isect_with_ctor ()
#42 0x000000000056e6e0 in box_flags_serial_test ()
#43 0x0000000000575e95 in srv_client_session_died ()
#44 0x00000000004435bc in ?? ()
#45 0x000000000043ef8e in ?? ()