[1] __cexp(0x0, 0x0, 0xf01b866e, 0x400921f9, 0x6, 0x89b1f20), at 0xfe801928 
=>[2] scm_exp(z = (nil)), line 167 in "numbers.c"
  [3] vm_debug_engine(vm = 0x80fb690, program = 0x80dcad0, argv = 0x8046f14, nargs = 1), line 892 in "vm-i-system.c"
  [4] scm_c_vm_run(vm = (nil), program = (nil), argv = (nil), nargs = 0), line 586 in "vm.c"
  [5] scm_primitive_eval(exp = 0x9a93378), line 685 in "eval.c"
  [6] scm_primitive_load(filename = (nil)), line 132 in "load.c"
  [7] vm_debug_engine(vm = 0x80fb690, program = 0xfef67930, argv = 0x8047124, nargs = 1), line 892 in "vm-i-system.c"
  [8] scm_c_vm_run(vm = (nil), program = (nil), argv = (nil), nargs = 0), line 586 in "vm.c"
  [9] scm_primitive_eval(exp = 0x81e9458), line 685 in "eval.c"
  [10] scm_eval(exp = (nil), module_or_state = (nil)), line 719 in "eval.c"
  [11] scm_shell(argc = 11, argv = (nil)), line 441 in "script.c"
  [12] invoke_main_func(body_data = (nil)), line 338 in "init.c"
  [13] c_body(d = (nil)), line 511 in "continuations.c"
  [14] apply_catch_closure(clo = (nil), args = 0x304), line 146 in "throw.c"
  [15] apply_1(smob = (nil), a = (nil)), line 141 in "smob.c"
  [16] vm_regular_engine(vm = 0x80fb690, program = 0x80f50a0, argv = 0x80473c0, nargs = 2), line 895 in "vm-i-system.c"
  [17] scm_c_vm_run(vm = (nil), program = (nil), argv = (nil), nargs = 0), line 586 in "vm.c"
  [18] scm_call_4(proc = (nil), arg1 = (nil), arg2 = (nil), arg3 = (nil), arg4 = (nil)), line 507 in "eval.c"
  [19] scm_catch_with_pre_unwind_handler(key = 0x404, thunk = 0x81d6ea0, handler = 0x81d6e90, pre_unwind_handler = (nil)), line 86 in "throw.c"
r_data = 0x80fb650), line 213 in "throw.c"
  [21] scm_i_with_continuation_barrier(body = (nil), body_data = (nil), handler = (nil), handler_data = (nil), pre_unwind_handler = (nil), pre_unwind_handler_data = (nil)), line 449 in "continuations.c"
  [22] scm_c_with_continuation_barrier(func = (nil), data = (nil)), line 545 in "continuations.c"
  [23] with_guile_and_parent(base = 0x80474f0, data = (nil)), line 905 in "threads.c"
  [24] GC_call_with_stack_base(fn = 0xfeef2310 = &`libguile-2.0.so.22.4.0`threads.c`with_guile_and_parent(struct GC_stack_base *base, register void *data), arg = (nil)), line 1530 in "misc.c"
  [25] scm_i_with_guile_and_parent(func = (nil), data = (nil), parent = (nil)), line 948 in "threads.c"
  [26] scm_boot_guile(argc = 0, argv = (nil), main_func = (nil), closure = (nil)), line 321 in "init.c"
  [27] main(argc = 0, argv = (nil)), line 71 in "guile.c"