Comment 5 for bug 903347

Occurs on cross. The backtrace with an x86_64 host against the gcc-linaro-4.6-2011.12 release is:

#0 0x082c21f1 in update_bb_for_insn_chain ()
#1 0x082c2246 in update_bb_for_insn ()
#2 0x082c1b17 in create_basic_block_structure ()
#3 0x082c1c39 in rtl_create_basic_block ()
#4 0x082b3a6b in create_basic_block ()
#5 0x082c23ba in rtl_split_block ()
#6 0x082b342f in split_block ()
#7 0x089f527b in find_bb_boundaries ()
#8 0x089f5878 in find_many_sub_basic_blocks ()
#9 0x082b2026 in gimple_expand_cfg ()
#10 0x0849347a in execute_one_pass ()
#11 0x08493755 in execute_pass_list ()
#12 0x085b7f62 in tree_rest_of_compilation ()
#13 0x0875887e in cgraph_expand_function ()
#14 0x08758a32 in cgraph_expand_all_functions ()
#15 0x087590a7 in cgraph_optimize ()
#16 0x0875735b in cgraph_finalize_compilation_unit ()
#17 0x08176897 in cp_write_global_declarations ()
#18 0x0855e546 in compile_file ()
#19 0x0856043c in do_compile ()
#20 0x08560587 in toplev_main ()
#21 0x08260c66 in main ()

It seems to be stuck in update_bb_for_insn_chain()