WebSocket segfaults if connection to server drops out

[LunaTheFoxgirl]

Currently working on https://github.com/Inochi2D/vts-d

The example program segfaults if VTube Studio is closed and the WebSocket Server as a result stops sending data or if for some other reason data doesn't arrive properly. In the log there's a WARNING: HTTPClientResponse not fully processed before being finalized warning before the crash

Example Program

module app;

import vts;
import std.datetime;
import std.stdio : writeln;
import std.random : choice;
import vibe.core.core : sleep;

void main() {
    VTSPlugin plugin = new VTSPlugin(PluginInfo("Test", "Me", null), "127.0.0.1");
    plugin.login();

    auto models = plugin.getModels();
    do {
        if (models.length > 0) plugin.tryLoadModel(choice(models).modelId);
        
        sleep(5.seconds);
    } while(plugin.isConnected());

    plugin.disconnect();
}

LLDB Backtrace

* thread #1, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=1, address=0x10)
    frame #0: 0x00000001005e6d70 vts-d`_D6object14TypeInfo_Class7getHashMxFNbNeMxPvZm + 12
vts-d`_D6object14TypeInfo_Class7getHashMxFNbNeMxPvZm:
->  0x1005e6d70 <+12>: ldr    x1, [x8, #0x10]
    0x1005e6d74 <+16>: br     x1
    0x1005e6d78 <+20>: ret    

vts-d`_D6object14TypeInfo_Class6equalsMxFIPvIQdZb:
    0x1005e6d7c <+0>:  ldr    x0, [x1]
Target 0: (vts-d) stopped.
(lldb) bt
* thread #1, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=1, address=0x10)
  * frame #0: 0x00000001005e6d70 vts-d`_D6object14TypeInfo_Class7getHashMxFNbNeMxPvZm + 12
    frame #1: 0x00000001005eb740 vts-d`_aaInX + 96
    frame #2: 0x00000001000ab898 vts-d`_D4vibe4core14connectionpool__T16LockedConnectionTCQBx4http6client10HTTPClientZQBw6__dtorMFNfZv(this=0x00000001025b6300) at connectionpool.d:277:4
    frame #3: 0x00000001000b2a88 vts-d`_D4vibe4http6client18HTTPClientResponse11__fieldDtorMFNeZv(this=0x00000001025bb000) at client.d:1091:2
    frame #4: 0x00000001000b41cc vts-d`_D4vibe4http6client18HTTPClientResponse10__aggrDtorMFNeZv(this=0x00000001025bb000) at client.d:1091:2
    frame #5: 0x00000001005f2ff8 vts-d`rt_finalize2 + 100
    frame #6: 0x00000001005d348c vts-d`_D4core8internal2gc4impl12conservativeQw3Gcx5sweepMFNbZm + 1120
    frame #7: 0x00000001005d031c vts-d`_D4core8internal2gc4impl12conservativeQw3Gcx11fullcollectMFNbbbbZm + 984
    frame #8: 0x00000001005d065c vts-d`_D4core8internal2gc4impl12conservativeQw14ConservativeGC__T9runLockedS_DQCsQCqQCkQCkQCiQCtQBy18fullCollectNoStackMFNbZ2goFNbPSQEuQEsQEmQEmQEkQEv3GcxZmTQBbZQDsMFNbKQBnZm + 76
    frame #9: 0x00000001005d88a4 vts-d`gc_term + 140
    frame #10: 0x00000001005eed74 vts-d`rt_term + 72
    frame #11: 0x00000001005ef2f4 vts-d`_D2rt6dmain212_d_run_main2UAAamPUQgZiZ6runAllMFZv + 168
    frame #12: 0x00000001005ef070 vts-d`_d_run_main2 + 376
    frame #13: 0x00000001005eeedc vts-d`_d_run_main + 148
    frame #14: 0x0000000100030cc8 vts-d`main(argc=1, argv=0x000000016fdff4a8) at entrypoint.d:42:17
    frame #15: 0x0000000101c79088 dyld`start + 516