October 11
Using this dub.json configuration

{
	"name": "app",
	"authors": [
		"Author"
	],
	"description": "App Description",
	"copyright": "Copyright © 2018, Author",
	"license": "Boost",
	"dependencies": {
        "arsd-official" : "~>2.1.2",
	"dub": "~>1.3.0",
	"vibe-d": "~>0.8.0",
        "fswatch": "~>0.3.0"
    }
}

And i've written a sample code just to get things running...

import std.stdio;
import vibe.d;

void main()
{
	writeln("JESUS IS LORD!!!!");
	auto settings = new HTTPServerSettings;
	settings.port = 8080;

	listenHTTP(settings, (req, res) { res.writeBody("Hello Vibe.d: " ~ req.path); });
	runApplication();
}


But when i do "dub run", i get this error.

running C:\Users\user\Codes\DLang\Projects\app\dub.json
Performing "plain" build using C:\D\dmd2\windows\bin\dmd.exe for x86.
dub 1.3.0: building configuration "library"...
taggedalgebraic 0.10.11: building configuration "library"...
eventcore 0.8.36: building configuration "winapi-optlink"...
..\..\..\..\AppData\Local\dub\packages\eventcore-0.8.36\eventcore\source\eventcore\drivers\posix\driver.d(145,14): Error: safe function 'eventcore.drivers.posix.driver.PosixEventDriverCore!(SelectEventLoop, LoopTimeoutTimerDriver, PosixEventDriverEvents!(SelectEventLoop, PosixEventDriverSockets!(SelectEventLoop))).PosixEventDriverCore.dispose' cannot call system function 'core.atomic.atomicStore!(cast(MemoryOrder)3, Mutex, typeof(null)).atomicStore'
..\..\..\..\AppData\Local\dub\packages\eventcore-0.8.36\eventcore\source\eventcore\drivers\posix\select.d(26,27): Error: template instance eventcore.drivers.posix.driver.PosixEventDriver!(SelectEventLoop) error instantiating
..\..\..\..\AppData\Local\dub\packages\eventcore-0.8.36\eventcore\source\eventcore\drivers\posix\driver.d(210,22): Error: safe function 'eventcore.drivers.posix.driver.PosixEventDriverCore!(SelectEventLoop, LoopTimeoutTimerDriver, PosixEventDriverEvents!(SelectEventLoop, PosixEventDriverSockets!(SelectEventLoop))).PosixEventDriverCore.runInOwnerThread' cannot call system function 'core.atomic.atomicLoad!(cast(MemoryOrder)3, Mutex).atomicLoad'
..\..\..\..\AppData\Local\dub\packages\eventcore-0.8.36\eventcore\source\eventcore\drivers\posix\driver.d(211,24): Error: safe function 'eventcore.drivers.posix.driver.PosixEventDriverCore!(SelectEventLoop, LoopTimeoutTimerDriver, PosixEventDriverEvents!(SelectEventLoop, PosixEventDriverSockets!(SelectEventLoop))).PosixEventDriverCore.runInOwnerThread' cannot call system function 'core.atomic.atomicLoad!(cast(MemoryOrder)3, Handle!("event", Handle!("fd", uint, 4294967295u), Handle(4294967295u))).atomicLoad'
..\..\..\..\AppData\Local\dub\packages\eventcore-0.8.36\eventcore\source\eventcore\drivers\posix\driver.d(41,22): Error: template instance eventcore.drivers.posix.driver.PosixEventDriverCore!(SelectEventLoop, LoopTimeoutTimerDriver, PosixEventDriverEvents!(SelectEventLoop, PosixEventDriverSockets!(SelectEventLoop))) error instantiating
..\..\..\..\AppData\Local\dub\packages\eventcore-0.8.36\eventcore\source\eventcore\drivers\posix\select.d(26,27):        instantiated from here: PosixEventDriver!(SelectEventLoop)
..\..\..\..\AppData\Local\dub\packages\eventcore-0.8.36\eventcore\source\eventcore\drivers\winapi\core.d(112,22): Error: safe function 'eventcore.drivers.winapi.core.WinAPIEventDriverCore.runInOwnerThread' cannot call system function 'core.atomic.atomicLoad!(cast(MemoryOrder)3, Mutex).atomicLoad'
..\..\..\..\AppData\Local\dub\packages\eventcore-0.8.36\eventcore\source\eventcore\drivers\winapi\sockets.d(256,18): Error: 'eventcore.drivers.winapi.sockets.WinAPIEventDriverSockets.read.resetBuffers' is not nothrow
..\..\..\..\AppData\Local\dub\packages\eventcore-0.8.36\eventcore\source\eventcore\drivers\winapi\sockets.d(261,17): Error: 'eventcore.drivers.winapi.sockets.WinAPIEventDriverSockets.read.resetBuffers' is not nothrow
..\..\..\..\AppData\Local\dub\packages\eventcore-0.8.36\eventcore\source\eventcore\drivers\winapi\sockets.d(238,16): Error: function 'eventcore.drivers.winapi.sockets.WinAPIEventDriverSockets.read' is nothrow yet may throw
C:\D\dmd2\windows\bin\dmd.exe failed with exit code 1.
C:\Users\user\Codes\DLang\Projects\app\dub.json has not been successfully executed
error: DUB has returned the status 2 (undeterminated meaning)



Please Help!!! I will be very grateful for your help sirs/ma

October 12
On Thursday, 11 October 2018 at 18:20:56 UTC, Ephrahim wrote:
> Using this dub.json configuration
0.8.36\eventcore\source\eventcore\drivers\posix\driver.d(145,14): Error: safe function 'eventcore.drivers.posix.driver.PosixEventDriverCore!(SelectEventLoop, LoopTimeoutTimerDriver, PosixEventDriverEvents!(SelectEventLoop, PosixEventDriverSockets!(SelectEventLoop))).PosixEventDriverCore.dispose' cannot call system function 'core.atomic.atomicStore!(cast(MemoryOrder)3, Mutex, typeof(null)).atomicStore'
> ..\..\..\..\AppData\Local\dub\packages\eventcore-0.8.36\eventcore\source\eventcore\drivers\posix\select.d(26,27): Error: template instance eventcore.drivers.posix.driver.PosixEventDriver!(SelectEventLoop) error instantiating
> ..\..\..\..\AppData\Local\dub\packages\eventcore-0.8.36\eventcore\source\eventcore\drivers\posix\driver.d(210,22): Error: safe function 'eventcore.drivers.posix.driver.PosixEventDriverCore!(SelectEventLoop, LoopTimeoutTimerDriver, PosixEventDriverEvents!(SelectEventLoop, PosixEventDriverSockets!(SelectEventLoop))).PosixEventDriverCore.runInOwnerThread' cannot call system function 'core.atomic.atomicLoad!(cast(MemoryOrder)3, Mutex).atomicLoad'
> ..\..\..\..\AppData\Local\dub\packages\eventcore-0.8.36\eventcore\source\eventcore\drivers\posix\driver.d(211,24): Error: safe function 'eventcore.drivers.posix.driver.PosixEventDriverCore!(SelectEventLoop, LoopTimeoutTimerDriver, PosixEventDriverEvents!(SelectEventLoop, PosixEventDriverSockets!(SelectEventLoop))).PosixEventDriverCore.runInOwnerThread' cannot call system function 'core.atomic.atomicLoad!(cast(MemoryOrder)3, Handle!("event", Handle!("fd", uint, 4294967295u), Handle(4294967295u))).atomicLoad'
> ..\..\..\..\AppData\Local\dub\packages\eventcore-0.8.36\eventcore\source\eventcore\drivers\posix\driver.d(41,22): Error: template instance eventcore.drivers.posix.driver.PosixEventDriverCore!(SelectEventLoop, LoopTimeoutTimerDriver, PosixEventDriverEvents!(SelectEventLoop, PosixEventDriverSockets!(SelectEventLoop))) error instantiating
> ..\..\..\..\AppData\Local\dub\packages\eventcore-0.8.36\eventcore\source\eventcore\drivers\posix\select.d(26,27):        instantiated from here: PosixEventDriver!(SelectEventLoop)
> ..\..\..\..\AppData\Local\dub\packages\eventcore-0.8.36\eventcore\source\eventcore\drivers\winapi\core.d(112,22): Error: safe function 'eventcore.drivers.winapi.core.WinAPIEventDriverCore.runInOwnerThread' cannot call system function 'core.atomic.atomicLoad!(cast(MemoryOrder)3, Mutex).atomicLoad'
> ..\..\..\..\AppData\Local\dub\packages\eventcore-0.8.36\eventcore\source\eventcore\drivers\winapi\sockets.d(256,18): Error: 'eventcore.drivers.winapi.sockets.WinAPIEventDriverSockets.read.resetBuffers' is not nothrow
> ..\..\..\..\AppData\Local\dub\packages\eventcore-0.8.36\eventcore\source\eventcore\drivers\winapi\sockets.d(261,17): Error: 'eventcore.drivers.winapi.sockets.WinAPIEventDriverSockets.read.resetBuffers' is not nothrow
> ..\..\..\..\AppData\Local\dub\packages\eventcore-0.8.36\eventcore\source\eventcore\drivers\winapi\sockets.d(238,16): Error: function 'eventcore.drivers.winapi.sockets.WinAPIEventDriverSockets.read' is nothrow yet may throw
> C:\D\dmd2\windows\bin\dmd.exe failed with exit code 1.
> C:\Users\user\Codes\DLang\Projects\app\dub.json has not been successfully executed
> error: DUB has returned the status 2 (undeterminated meaning)
>
>
>
> Please Help!!! I will be very grateful for your help sirs/ma

That's a programming error in 'eventcore' at first glance. Some attributes are not valid. Maybe the library is tested on x86_64 only and using it on x86 reveals issues. Also the error seem to happen in a module that's for linux or OSX but i see that the paths are windows-style. You should really report to the author. The error is not on your side.