Thanks, I tried again and it seems to be working:

  $ dmd -g main.d && ./main
  etc.linux.memoryerror.NullPointerError@src/etc/linux/memoryerror.d(325)
  ----------------
  ??:? void etc.linux.memoryerror.sigsegvUserspaceProcess(void*) [0x423321]
  ??:? void etc.linux.memoryerror.sigsegvDataHandler() [0x42326e]
  main.d:12 _Dmain [0x4204e5]
  ??:? _D2rt6dmain211_d_run_mainUiPPaPUAAaZiZ6runAllMFZ9__lambda1MFZv [0x421b8a]
  ??:? void rt.dmain2._d_run_main(int, char**, extern (C) int function(char[][])*).tryExec(scope void delegate()) [0x421ae0]
  ??:? void rt.dmain2._d_run_main(int, char**, extern (C) int function(char[][])*).runAll() [0x421b46]
  ??:? void rt.dmain2._d_run_main(int, char**, extern (C) int function(char[][])*).tryExec(scope void delegate()) [0x421ae0]
  ??:? _d_run_main [0x421a3d]
  ??:? main [0x420597]
  ??:? __libc_start_main [0xdb825ec4]

this is linux, I use mac as development machine, what can I do for mac? is there a error handler for mac too?