Error calling 'bufferevent_free' twice in NativeTransport on request end

[AdamGolovenko]

Hello,

problem is somewhere inside C code, seems like bufferevent_free called twice and not obvious. Please help me if possible or just say where I need to search.

What additional info should I provide?
I can connect to test server if needed.

[err] bufferevent.c:611: Assertion bufev_private->refcnt > 0 failed in _bufferevent_decref_and_unlock
Stacktrace:

at <0xffffffff>
at (wrapper managed-to-native) HyperFastCgi.Transports.NativeTransport.EndRequest (HyperFastCgi.Transports.NativeTransport,ulong,int,int) <0xffffffff>
at HyperFastCgi.AppHosts.Raw.BaseRawRequest.CompleteResponse () <0x00027>
at AIHelpsServer.HelloWorldRequest.Process (HyperFastCgi.Interfaces.IWebResponse) <0x000c9>
at HyperFastCgi.Transports.BaseAppHostTransport/c__AnonStorey0.<>m__1 (object) <0x000b7>
at System.Threading.QueueUserWorkItemCallback.WaitCallback_Context (object) <0x00050>
at System.Threading.ExecutionContext.RunInternal (System.Threading.ExecutionContext,System.Threading.ContextCallback,object,bool) <0x0021a>
at System.Threading.ExecutionContext.Run (System.Threading.ExecutionContext,System.Threading.ContextCallback,object,bool) <0x00028>
at System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem () <0x00057>
at System.Threading.ThreadPoolWorkQueue.Dispatch () <0x0021a>
at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback () <0x00010>
at (wrapper runtime-invoke) .runtime_invoke_bool (object,intptr,intptr,intptr) <0xffffffff>

Native stacktrace:

   /usr/bin/mono() [0x495730]
    /lib64/libpthread.so.0(+0xf5a0) [0x7f679c7b55a0]
    /lib64/libc.so.6(gsignal+0x37) [0x7f679c2011f7]
    /lib64/libc.so.6(abort+0x148) [0x7f679c2028e8]
    /usr/lib64/libevent-2.0.so.5(+0x1fc0a) [0x7f6792664c0a]
    /usr/lib64/libevent-2.0.so.5(+0x1ff7b) [0x7f6792664f7b]
    /usr/lib64/libevent-2.0.so.5(+0x1a102) [0x7f679265f102]
    /usr/lib64/libevent-2.0.so.5(bufferevent_free+0x8b) [0x7f679265f50b]
    /usr/lib/libhfc-native.so.1(free_cmdsocket_only+0x29) [0x7f6792dba3b9]
    /usr/lib/libhfc-native.so.1(end_request+0x129) [0x7f6792dbb9e9]
    [0x4077954c]

Debug info from gdb:

=================================================================
Got a SIGABRT while executing native code. This usually indicates
a fatal error in the mono runtime or one of the native libraries
used by your application.

Aborted