hangs, ctrl+c not working, 

unexpected error from waitpid(138321064[1]): 10
unexpected error from waitpid(8345[1]): 10
unexpected error from waitpid(8344[1]): 10
unexpected error from waitpid(138321064[1]): 10
unexpected error from waitpid(8345[1]): 10
unexpected error from waitpid(8344[1]): 10
unexpected error from waitpid(138321448[1]): 10
unexpected error from waitpid(138321064[1]): 10
unexpected error from waitpid(8345[1]): 10
unexpected error from waitpid(8344[1]): 10
unexpected error from waitpid(138321448[1]): 10
unexpected error from waitpid(138321064[1]): 10
unexpected error from waitpid(8345[1]): 10
unexpected error from waitpid(8344[1]): 10
unexpected error from waitpid(138321448[1]): 10

^\Quit (core dumped)

(gdb) bt
#0  0xffffe424 in __kernel_vsyscall ()
#1  0xb7643ea7 in poll () from /lib/libc.so.6
#2  0x0820f10c in default_sleep (v=0, fds=0xb56540e8) at ./../src/port.c:10114
#3  0x082c9653 in check_sleep (need_activity=1, sleep_now=1) at ./../src/thread.c:4043
#4  0x082cb262 in scheme_thread_block (sleep_time=0) at ./../src/thread.c:4751
#5  0x082cb7b5 in scheme_block_until (_f=0x820ca17 <subp_done>, fdf=0x820cb32 <subp_needs_wakeup>, data=0xb62bec90, delay=0) at ./../src/thread.c:4887
#6  0x0820cd8e in subprocess_wait (argc=1, argv=0xb6260eb4) at ./../src/port.c:8670
#7  0x0808f101 in _scheme_tail_apply_from_native_fast (rator=0x83c6f58, argc=1, argv=0xb6260eb4) at ./../src/schnapp.inc:34
#8  0x0808efdd in _scheme_tail_apply_from_native (rator=0x83c6f58, argc=1, argv=0xb6260eb4) at ./../src/schnapp.inc:64
#9  0x081080a8 in ts__scheme_tail_apply_from_native (rator=0x83c6f58, argc=1, argv=0xb6260eb4) at ./../src/jitcall.c:174
#10 0xb7780964 in ?? ()
#11 0x08093db8 in scheme_do_eval (obj=0x0, num_rands=2, rands=0xbfd1667c, get_value=-1) at ./../src/eval.c:2837
#12 0x080c3638 in scheme_finish_apply_for_prompt (prompt=0x0, _prompt_tag=0xb57b8150, proc=0xb57b7f90, argc=2, argv=0xbfd1667c) at ./../src/fun.c:5847
#13 0x080c3934 in scheme_apply_for_prompt (prompt=0xb39f3610, prompt_tag=0xb57b8150, proc=0xb57b7f90, argc=2, argv=0xbfd1667c) at ./../src/fun.c:5926
#14 0x080c4b13 in call_with_prompt (in_argc=5, in_argv=0xb6260ec0) at ./../src/fun.c:6325
#15 0x0808f101 in _scheme_tail_apply_from_native_fast (rator=0x83c4428, argc=5, argv=0xb6260ec0) at ./../src/schnapp.inc:34
#16 0x0808efdd in _scheme_tail_apply_from_native (rator=0x83c4428, argc=5, argv=0xb6260ec0) at ./../src/schnapp.inc:64
#17 0x081080a8 in ts__scheme_tail_apply_from_native (rator=0x83c4428, argc=5, argv=0xb6260ec0) at ./../src/jitcall.c:174
#18 0xb7780964 in ?? ()
#19 0xb7766064 in ?? ()
#20 0xb5902334 in ?? ()
#21 0x08093db8 in scheme_do_eval (obj=0x0, num_rands=0, rands=0x0, get_value=-1) at ./../src/eval.c:2837
#22 0x0808edda in _scheme_apply_multi_from_native (rator=0xb39efbe0, argc=0, argv=0x0) at ./../src/schnapp.inc:87
#23 0x081174d4 in ts__scheme_apply_multi_from_native (g7=0xb39efbe0, g8=0, g9=0x0) at ./../src/jit_ts.c:121
#24 0xb7780903 in ?? ()
#25 0x08093db8 in scheme_do_eval (obj=0x0, num_rands=0, rands=0x0, get_value=-1) at ./../src/eval.c:2837
#26 0x080ca33b in pre_post_dyn_wind (prepost=0xb39efbe0) at ./../src/fun.c:8214
#27 0x080ca3e7 in post_dyn_wind (d=0xb3a3fc48) at ./../src/fun.c:8237
#28 0x080cada6 in scheme_dynamic_wind (pre=0x80ca3bd <pre_dyn_wind>, act=0x80ca389 <do_dyn_wind>, post=0x80ca3d3 <post_dyn_wind>, jmp_handler=0, data=0xb3a3fc48) at ./../src/fun.c:8411
#29 0x080ca532 in dynamic_wind (c=3, argv=0xb6260f60) at ./../src/fun.c:8258
#30 0x0808f101 in _scheme_tail_apply_from_native_fast (rator=0x83c4858, argc=3, argv=0xb6260f60) at ./../src/schnapp.inc:34
#31 0x0808efdd in _scheme_tail_apply_from_native (rator=0x83c4858, argc=3, argv=0xb6260f60) at ./../src/schnapp.inc:64
#32 0x081080a8 in ts__scheme_tail_apply_from_native (rator=0x83c4858, argc=3, argv=0xb6260f60) at ./../src/jitcall.c:174
#33 0xb7780964 in ?? ()
#34 0x08093db8 in scheme_do_eval (obj=0x0, num_rands=11, rands=0xb6260f80, get_value=1) at ./../src/eval.c:2837
#35 0x080955ae in scheme_do_eval (obj=0x83c4d98, num_rands=-1, rands=0xb6260fac, get_value=1) at ./../src/eval.c:3228
#36 0x080955ae in scheme_do_eval (obj=0xb39ef970, num_rands=-1, rands=0xb6260fb0, get_value=-1) at ./../src/eval.c:3228
#37 0x080918e3 in apply_values_execute (data=0xb39e4958) at ./../src/eval.c:2031
#38 0x08096880 in scheme_do_eval (obj=0xb39e4958, num_rands=-1, rands=0x0, get_value=-1) at ./../src/eval.c:3666
#39 0x081815e6 in body_one_expr (prefix_plus_expr=0xb3a3fc60, argc=0, argv=0x0) at ./../src/module.c:5482
#40 0x08094920 in scheme_do_eval (obj=0xb3a3fc70, num_rands=0, rands=0x0, get_value=-1) at ./../src/eval.c:2991
#41 0x080c3638 in scheme_finish_apply_for_prompt (prompt=0x0, _prompt_tag=0xb6835998, proc=0xb3a3fc70, argc=0, argv=0x0) at ./../src/fun.c:5847
#42 0x080c3934 in scheme_apply_for_prompt (prompt=0xb49d0720, prompt_tag=0xb6835998, proc=0xb3a3fc70, argc=0, argv=0x0) at ./../src/fun.c:5926
#43 0x080c4b13 in call_with_prompt (in_argc=3, in_argv=0xbfd17fac) at ./../src/fun.c:6325
#44 0x08092f20 in scheme_do_eval (obj=0x83c4428, num_rands=3, rands=0xbfd17fac, get_value=-1) at ./../src/eval.c:2582
#45 0x080c53a5 in do_call_with_prompt (f=0x818155b <body_one_expr>, data=0xb42866a0, multi=1, top_level=0) at ./../src/fun.c:6520
#46 0x080c54f9 in _scheme_call_with_prompt_multi (f=0x818155b <body_one_expr>, data=0xb42866a0) at ./../src/fun.c:6546
#47 0x08181aa9 in scheme_module_run_finish (menv=0xb4eb84d8, env=0xb56587c8) at ./../src/module.c:5577
#48 0xb777c375 in ?? ()
#49 0x0815f69c in scheme_module_run_start (menv=0xb4eb84d8, env=0xb56587c8, name=0xb3a3fce8) at ./../src/jitstack.c:492
#50 0x08181544 in eval_module_body (menv=0xb4eb84d8, env=0xb56587c8) at ./../src/module.c:5471
#51 0x08180d19 in do_start_module (m=0xb49c50a8, menv=0xb49d1378, env=0xb56587c8, restart=0) at ./../src/module.c:5265
#52 0x08181118 in start_module (m=0xb4eb8560, env=0xb56587c8, restart=0, syntax_idx=0xb5659688, eval_exp=-1, eval_run=1, base_phase=0, cycle_list=0x839d470, not_new=0)
    at ./../src/module.c:5362
#53 0x0819ee66 in parse_requires (form=0xb5659688, at_phase=0, base_modidx=0x839cacc, main_env=0xb56587c8, for_m=0x0, rn_set=0xb3a3fd08, post_ex_rn_set=0x0, ck=0, data=0x0, 
    redef_modname=0x0, unpack_kern=1, copy_vars=0, can_save_marshal=0, eval_exp=-1, eval_run=1, all_simple=0x0, modidx_cache=0x0, submodule_names=0x0) at ./../src/module.c:11728
#54 0x08173880 in do_namespace_require (env=0xb56587c8, argc=1, argv=0xbfd18c18, copy=0, etonly=0) at ./../src/module.c:1293
#55 0x08173900 in namespace_require (argc=1, argv=0xbfd18c18) at ./../src/module.c:1309
#56 0x08092f20 in scheme_do_eval (obj=0x83c6af8, num_rands=1, rands=0xbfd18c18, get_value=1) at ./../src/eval.c:2582
#57 0x080b39c8 in apply_k () at ./../src/fun.c:1336
#58 0x080b3213 in scheme_top_level_do_worker (k=0x80b38a2 <apply_k>, eb=1, new_thread=0, dyn_state=0x0) at ./../src/fun.c:1175
#59 0x080b2da6 in scheme_top_level_do (k=0x80b38a2 <apply_k>, eb=1) at ./../src/fun.c:1088
#60 0x080b3a4a in _apply (rator=0x83c6af8, num_rands=1, rands=0xbfd18c18, multi=0, eb=1) at ./../src/fun.c:1349
#61 0x080b3a7b in scheme_apply (rator=0x83c6af8, num_rands=1, rands=0xbfd18c18) at ./../src/fun.c:1355
#62 0x0806b6b6 in finish_cmd_line_run (fa=0xb56542f8, repl=0x806e01f <do_scheme_rep>) at ./../cmdline.inc:373
#63 0x0806e01d in cont_run (f=0xb62f7060) at ./../main.c:407
#64 0x0806dcdc in run_from_cmd_line (argc=0, _argv=0xbfd18fe4, mk_basic_env=0x8074dea <scheme_basic_env>, cont_run=0x806e004 <cont_run>) at ./../cmdline.inc:1415
#65 0x0806dfc1 in main_after_stack (data=0xbfd18f20) at ./../main.c:392
#66 0x0806e2f2 in do_main_stack_setup (no_auto_statics=1, _main=0x806dee8 <main_after_stack>, data=0xbfd18f20) at ./../src/salloc.c:194
#67 0x0806e346 in scheme_main_stack_setup (no_auto_statics=1, _main=0x806dee8 <main_after_stack>, data=0xbfd18f20) at ./../src/salloc.c:296
#68 0x0806dee6 in main_after_dlls (argc=2, argv=0xbfd18fe4) at ./../main.c:323
#69 0x0806deb0 in main (argc=Cannot access memory at address 0x2
) at ./../main.c:299