Assertion failure in freelistref.d(175)

[voxluke]

Hello, we created a chat engine built upon vibe. But sometimes, we got the following error:

core.exception.AssertError@/root/.dub/packages/vibe-core-1.22.4/vibe-core/source/vibe/internal/freelistref.d(175): Assertion failure
----------------
??:? _d_assertp [0x55682bf5f6cc]
/root/.dub/packages/vibe-core-1.22.4/vibe-core/source/vibe/internal/freelistref.d:175 const pure nothrow @nogc @safe void vibe.internal.freelistref.FreeListRef!(vibe.stream.counting.EndCallbackInputStream, true).FreeListRef.checkInvariants() [0x55682bcbf8ce]
/root/.dub/packages/vibe-core-1.22.4/vibe-core/source/vibe/internal/freelistref.d:149 nothrow @safe void vibe.internal.freelistref.FreeListRef!(vibe.stream.counting.EndCallbackInputStream, true).FreeListRef.clear() [0x55682bcbf7ef]
/root/.dub/packages/vibe-core-1.22.4/vibe-core/source/vibe/internal/freelistref.d:121 nothrow @safe void vibe.internal.freelistref.FreeListRef!(vibe.stream.counting.EndCallbackInputStream, true).FreeListRef.__dtor() [0x55682bcbf74c]
/root/.dub/packages/vibe-d-0.9.4/vibe-d/http/vibe/http/client.d:1080 @trusted void vibe.http.client.HTTPClientResponse.__fieldDtor() [0x55682bca26d3]
/root/.dub/packages/vibe-d-0.9.4/vibe-d/http/vibe/http/client.d:1080 @trusted void vibe.http.client.HTTPClientResponse.__aggrDtor() [0x55682bca2735]
??:? rt_finalize2 [0x55682bf6f1d2]
??:? rt_finalize [0x55682bf6f2e0]
/usr/include/dmd/druntime/import/object.d:3970 nothrow void object.destroy!(true, vibe.http.client.HTTPClientResponse).destroy(vibe.http.client.HTTPClientResponse) [0x55682bd4c0e5]
/usr/include/dmd/phobos/std/typecons.d:8076 nothrow void std.typecons.scoped!(vibe.http.client.HTTPClientResponse).Scoped.__dtor() [0x55682bcd7220]
/usr/include/dmd/phobos/std/typecons.d:8087 std.typecons.scoped!(vibe.http.client.HTTPClientResponse).Scoped std.typecons.scoped!(vibe.http.client.HTTPClientResponse).scoped!(vibe.http.client.HTTPClient, bool, bool, vibe.internal.utilallocator.RegionListAllocator!(shared(stdx.allocator.gc_allocator.GCAllocator), true).RegionListAllocator, std.datetime.systime.SysTime).scoped(vibe.http.client.HTTPClient, ref bool, ref bool, ref vibe.internal.utilallocator.RegionListAllocator!(shared(stdx.allocator.gc_allocator.GCAllocator), true).RegionListAllocator, ref std.datetime.systime.SysTime) [0x55682bcd7372]
/root/.dub/packages/vibe-d-0.9.4/vibe-d/http/vibe/http/client.d:554 @trusted void vibe.http.client.HTTPClient.request(scope void delegate(scope vibe.http.client.HTTPClientRequest), scope void delegate(scope vibe.http.client.HTTPClientResponse)) [0x55682bc9d902]
/root/.dub/packages/vibe-d-0.9.4/vibe-d/http/vibe/http/client.d:108 @safe void vibe.http.client.requestHTTP(vibe.inet.url.URL, void delegate(scope vibe.http.client.HTTPClientRequest), scope void delegate(scope vibe.http.client.HTTPClientResponse), const(vibe.http.client.HTTPClientSettings)) [0x55682bc9c62f]
/root/.dub/packages/vibe-d-0.9.4/vibe-d/http/vibe/http/client.d:98 @safe void vibe.http.client.requestHTTP(immutable(char)[], scope void delegate(scope vibe.http.client.HTTPClientRequest), scope void delegate(scope vibe.http.client.HTTPClientResponse), const(vibe.http.client.HTTPClientSettings)) [0x55682bc9c53b]
source/chat.d:168 void chat.ChatFunctions.makeNewComment(session.usersession.UserSession, immutable(char)[], immutable(char)[]) [0x55682bc9250c]
source/app.d:370 void app.handleWebSocketConnection(scope vibe.http.websockets.WebSocket) [0x55682bc5bd8f]
/root/.dub/packages/vibe-d-0.9.4/vibe-d/http/vibe/http/websockets.d:347 nothrow void vibe.http.websockets.handleWebSockets(void function(scope vibe.http.websockets.WebSocket)*).__dgliteral2!(vibe.http.websockets.WebSocket).__dgliteral2(scope vibe.http.websockets.WebSocket) [0x55682bd4873b]
/root/.dub/packages/vibe-d-0.9.4/vibe-d/http/vibe/http/websockets.d:312 nothrow @trusted void vibe.http.websockets.handleWebSockets(void delegate(scope vibe.http.websockets.WebSocket) nothrow).__dgliteral2!(vibe.http.websockets.WebSocket).__dgliteral2(scope vibe.http.websockets.WebSocket) [0x55682bdcd72c]
/root/.dub/packages/vibe-d-0.9.4/vibe-d/http/vibe/http/websockets.d:300 @safe void vibe.http.websockets.handleWebSockets(void delegate(scope vibe.http.websockets.WebSocket) nothrow @safe).callback(scope vibe.http.server.HTTPServerRequest, vibe.http.server.HTTPServerResponse).__lambda13!(vibe.core.stream.ConnectionStream).__lambda13(scope vibe.core.stream.ConnectionStream) [0x55682bdf6176]
/root/.dub/packages/vibe-d-0.9.4/vibe-d/http/vibe/http/server.d:1552 @trusted void vibe.http.server.HTTPServerResponse.switchProtocol(immutable(char)[], scope void delegate(scope vibe.core.stream.ConnectionStream) @safe).__lambda3() [0x55682bcbb54c]
/root/.dub/packages/vibe-d-0.9.4/vibe-d/http/vibe/http/server.d:1550 @safe void vibe.http.server.HTTPServerResponse.switchProtocol(immutable(char)[], scope void delegate(scope vibe.core.stream.ConnectionStream) @safe) [0x55682bcbb445]
/root/.dub/packages/vibe-d-0.9.4/vibe-d/http/vibe/http/websockets.d:297 @safe void vibe.http.websockets.handleWebSockets(void delegate(scope vibe.http.websockets.WebSocket) nothrow @safe).callback(scope vibe.http.server.HTTPServerRequest, vibe.http.server.HTTPServerResponse) [0x55682bdf609c]
/root/.dub/packages/vibe-d-0.9.4/vibe-d/http/vibe/http/router.d:218 @safe bool vibe.http.router.URLRouter.handleRequest(vibe.http.server.HTTPServerRequest, vibe.http.server.HTTPServerResponse).__lambda6!(ulong, immutable(char)[][]).__lambda6(ulong, scope immutable(char)[][]) [0x55682bcb0b2c]
/root/.dub/packages/vibe-d-0.9.4/vibe-d/http/vibe/http/router.d:734 const @safe bool vibe.http.router.MatchTree!(vibe.http.router.Route).MatchTree.doMatch(immutable(char)[], scope bool delegate(ulong, scope immutable(char)[][]) @safe) [0x55682bcb354a]
/root/.dub/packages/vibe-d-0.9.4/vibe-d/http/vibe/http/router.d:667 @safe bool vibe.http.router.MatchTree!(vibe.http.router.Route).MatchTree.match(immutable(char)[], scope bool delegate(ulong, scope immutable(char)[][]) @safe) [0x55682bcb2d6b]
/root/.dub/packages/vibe-d-0.9.4/vibe-d/http/vibe/http/router.d:211 @safe void vibe.http.router.URLRouter.handleRequest(vibe.http.server.HTTPServerRequest, vibe.http.server.HTTPServerResponse) [0x55682bcb079c]
/root/.dub/packages/vibe-d-0.9.4/vibe-d/http/vibe/http/server.d:2286 @safe bool vibe.http.server.handleRequest(vibe.internal.interfaceproxy.InterfaceProxy!(vibe.core.stream.Stream).InterfaceProxy, vibe.core.net.TCPConnection, vibe.http.server.HTTPServerContext, ref vibe.http.server.HTTPServerSettings, ref bool, scope stdx.allocator.IAllocator) [0x55682bd74a27]
/root/.dub/packages/vibe-d-0.9.4/vibe-d/http/vibe/http/server.d:253 @trusted void vibe.http.server.handleHTTPConnection(vibe.core.net.TCPConnection, vibe.http.server.HTTPServerContext).__lambda14() [0x55682bd72c9b]
/root/.dub/packages/vibe-d-0.9.4/vibe-d/http/vibe/http/server.d:245 @safe void vibe.http.server.handleHTTPConnection(vibe.core.net.TCPConnection, vibe.http.server.HTTPServerContext) [0x55682bd72898]
/root/.dub/packages/vibe-d-0.9.4/vibe-d/http/vibe/http/server.d:2043 nothrow @safe void vibe.http.server.listenHTTPPlain(vibe.http.server.HTTPServerSettings, void delegate(vibe.http.server.HTTPServerRequest, vibe.http.server.HTTPServerResponse) @safe).doListen(vibe.http.server.HTTPServerContext, bool, bool, bool).__lambda6(vibe.core.net.TCPConnection) [0x55682bcbe03e]
/root/.dub/packages/vibe-core-1.22.4/vibe-core/source/vibe/core/task.d:734 nothrow void vibe.core.task.TaskFuncInfo.set!(void delegate(vibe.core.net.TCPConnection) nothrow @safe, vibe.core.net.TCPConnection).set(ref void delegate(vibe.core.net.TCPConnection) nothrow @safe, ref vibe.core.net.TCPConnection).callDelegate(ref vibe.core.task.TaskFuncInfo) [0x55682bf035bc]
/root/.dub/packages/vibe-core-1.22.4/vibe-core/source/vibe/core/task.d:755 void vibe.core.task.TaskFuncInfo.call() [0x55682bed0fe1]
/root/.dub/packages/vibe-core-1.22.4/vibe-core/source/vibe/core/task.d:454 nothrow void vibe.core.task.TaskFiber.run() [0x55682bed01cb]

I tried to see the vibe source code, but as I see it is related to this: private size_t m_magic = 0x1EE75817; // workaround for compiler bug

Can somebody explain what is the problem and how can we eliminate this?

[Geod24]

This is issue vibe-d/vibe-core#283
It's a DMD bug. The best way to work around it is to use -preview=dtorfields in your dflags.