Illegal instruction in Linux

[kirilltitov]

This code works in macOS, but results in Illegal instruction in Linux (official Swift 4.2.1 Docker image):

import Foundation
import Signals

let semaphore = DispatchSemaphore(value: 0)

class Signaler {
    static func execute() {
        semaphore.signal()
    }
}

// crashes even if closure is empty
Signals.trap(signals: [.int, .term]) { s in
    print("Trapped \(s)")
    Signaler.execute()
}

print("Now we wait")
semaphore.wait()
print("Bye!")

However, classic signal works fine both in macOS and Linux:

import Foundation

let semaphore = DispatchSemaphore(value: 0)

class Signaler {
    static func execute() {
        semaphore.signal()
    }
}

let trap: @convention(c) (Int32) -> Void = { s in
    print("Received signal \(s)")
    Signaler.execute()
}

signal(SIGINT, trap)
signal(SIGTERM, trap)

print("Now we wait")
semaphore.wait()
print("Bye!")

[alex-taffe]

I’m having a similar issue, any luck on this?

Edit: had nothing to do with BlueSignals, it was just a nil in my code that was causing it to crash, compiling in debug mode showed the issue