AddressSanitizer:DEADLYSIGNAL when client is trying to connect

[AnakTeka]

I already start the server, but whenever I start the client I got this error

% ./jsfw client 192.168.181.233 5324 client.json
[Client (192.168.181.233:5324)] <- client.json

AddressSanitizer:DEADLYSIGNAL
=================================================================
==390489==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000000 (pc 0x72f31ac952dc bp 0x7ffece45b700 sp 0x7ffece45ae88 T0)
==390489==The signal is caused by a READ memory access.
==390489==Hint: address points to the zero page.
    #0 0x72f31ac952dc  (/usr/lib/libc.so.6+0x17f2dc) (BuildId: 695cfc6aac7d0f77bb7caba0ef01b2e868762b02)
    #1 0x72f31ae76b3c in strlen /usr/src/debug/gcc/gcc/libsanitizer/sanitizer_common/sanitizer_common_interceptors.inc:389
    #2 0x613148e26795 in build_device_request /home/yoga/stuff/git_repository/jsfw/client.c:397
    #3 0x613148e26ad2 in client_run /home/yoga/stuff/git_repository/jsfw/client.c:432
    #4 0x613148e30424 in client /home/yoga/stuff/git_repository/jsfw/main.c:24
    #5 0x613148e30665 in main /home/yoga/stuff/git_repository/jsfw/main.c:53
    #6 0x72f31ab3d487  (/usr/lib/libc.so.6+0x27487) (BuildId: 695cfc6aac7d0f77bb7caba0ef01b2e868762b02)
    #7 0x72f31ab3d54b in __libc_start_main (/usr/lib/libc.so.6+0x2754b) (BuildId: 695cfc6aac7d0f77bb7caba0ef01b2e868762b02)
    #8 0x613148e236a4 in _start (/home/yoga/stuff/git_repository/jsfw/jsfw+0x96a4) (BuildId: d0f728eb86b4145ddf479f79de6b4c3cd35c06e9)

AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV (/usr/lib/libc.so.6+0x17f2dc) (BuildId: 695cfc6aac7d0f77bb7caba0ef01b2e868762b02) 
==390489==ABORTING

this is the server json

{
    "controllers": [
        {
            "filter": { "vendor": "046d", "product": "c52f" },
            "tag": "Mouse"
        }
    ]
}

and client json

{
    "slots": [
        {
            "controllers": [
                {
                    "tag": ["Keyboard"],
                    "vendor": "046d",
                    "product": "c52f",
                    "name": "Emanuel"
                }
            ]
        }
    ]   
}