I got the lastest error info in my IDE:
Handling of connection failed: Operating on closed TCPConnection.
Task terminated with unhandled exception: Trying to acquire a TCP connection that is currently owned.
core.exception.AssertError@../../../zhmt/.dub/packages/vibe-d-0.7.22/source/vibe/core/drivers/libevent2_tcp.d(132): Trying to acquire a TCP connection that is currently owned.
----------------
5 ezsock 0x000000010a186563 void vibe.core.drivers.libevent2_tcp.Libevent2TCPConnection.acquire() + 239
6 ezsock 0x000000010a18685a void vibe.core.drivers.libevent2_tcp.Libevent2TCPConnection.close() + 126
7 ezsock 0x000000010a0cdae8 void ezsockacount.SockServer.SockServer.handleConn(vibe.core.net.TCPConnection) + 200
8 ezsock 0x000000010a0cda1a D12ezsockacount10SockServer10SockServer6listenMFZ45__T9__lambda1TC4vibe4core3net13TCPConnectionZ9__lambda1MFC4vibe4core3net13TCPConnectionZv + 34
9 ezsock 0x000000010a188b5f void vibe.core.drivers.libevent2_tcp.ClientTask.execute() + 1203
10 ezsock 0x000000010a09d258 void vibe.core.core.makeTaskFuncInfo!(void delegate()).makeTaskFuncInfo(ref void delegate()).callDelegate(vibe.core.core.TaskFuncInfo*) + 120
11 ezsock 0x000000010a16edab void vibe.core.core.CoreTask.run() + 395
12 ezsock 0x000000010a258d79 void core.thread.Fiber.run() + 49
13 ezsock 0x000000010a25891a fiber_entryPoint + 98
14 ??? 0x0000000000000000 0x0 + 0
=== Bypassed ===
std.exception.ErrnoException@(0): Error reading from socket 207 (Connection reset by peer)
----------------
5 ezsock 0x000000010a186c69 @property ulong vibe.core.drivers.libevent2_tcp.Libevent2TCPConnection.leastSize() + 357
6 ezsock 0x000000010a186af3 @property bool vibe.core.drivers.libevent2_tcp.Libevent2TCPConnection.empty() + 95
7 ezsock 0x000000010a1ad52d void vibe.core.stream.OutputStream.writeDefault(vibe.core.stream.InputStream, ulong) + 153
8 ezsock 0x000000010a187827 void vibe.core.drivers.libevent2_tcp.Libevent2TCPConnection.write(vibe.core.stream.InputStream, ulong) + 203
9 ezsock 0x000000010a0cc3e2 void ezsockacount.NetUtil.NetUtil.forward(vibe.core.net.TCPConnection, vibe.core.net.TCPConnection) + 170
10 ezsock 0x000000010a0cdb95 void ezsockacount.SockServer.SockServer.handleConnect(vibe.core.net.TCPConnection, ref sock_types.Cmd) + 157
11 ezsock 0x000000010a0cdace void ezsockacount.SockServer.SockServer.handleConn(vibe.core.net.TCPConnection) + 174
12 ezsock 0x000000010a0cda1a D12ezsockacount10SockServer10SockServer6listenMFZ45__T9__lambda1TC4vibe4core3net13TCPConnectionZ9__lambda1MFC4vibe4core3net13TCPConnectionZv + 34
13 ezsock 0x000000010a188b5f void vibe.core.drivers.libevent2_tcp.ClientTask.execute() + 1203
14 ezsock 0x000000010a09d258 void vibe.core.core.makeTaskFuncInfo!(void delegate()).makeTaskFuncInfo(ref void delegate()).callDelegate(vibe.core.core.TaskFuncInfo*) + 120
15 ezsock 0x000000010a16edab void vibe.core.core.CoreTask.run() + 395
16 ezsock 0x000000010a258d79 void core.thread.Fiber.run() + 49
17 ezsock 0x000000010a25891a fiber_entryPoint + 98
18 ??? 0x0000000000000000 0x0 + 0
=== ~Bypassed ===
Error executing command run: Program exited with code 1