How to find the cause of crash?

[zhmt via Digitalmars-d-learn]

On Wednesday, 11 March 2015 at 08:16:17 UTC, zhmt wrote:
> I developed a socks5 proxy server with vibe.d.
> but it crashed after running a few minutes, with the output 
> below:
>
> Task terminated with uncaught exception: Operating on closed 
> TCPConnection.
> Task terminated with uncaught exception: Operating on closed 
> TCPConnection.
> Task terminated with unhandled exception:
> ./run: line 3: 49999 段错误               (core dumped) ./ezsock
>
>
> the ./run is a simple shell to start ./ezsock.
>
>
> Now , my question is:
> How to get the position it crashes?
> Or get the method call stack?
>
> Any help is welcome,Thanks in advance!!


./run: line 3: 49999 segment error               (core dumped) 
./ezsock