Issue details

I am seeing a strange crash that only happens when Crashlytics is enabled.
The problem happens when cancelling outstanding HTTP requests.

When running from the console I see this:

AppLauncher failed with an exception:
java.lang.RuntimeException: The app crashed: Terminated due to signal 31. Check the device logs in Xcode (Window->Devices) for more info.
    at org.robovm.libimobiledevice.util.AppLauncher.pipeStdOut(AppLauncher.java:829)
    at org.robovm.libimobiledevice.util.AppLauncher.launchInternal(AppLauncher.java:734)
    at org.robovm.libimobiledevice.util.AppLauncher.launch(AppLauncher.java:1052)
    at org.robovm.compiler.target.ios.AppLauncherProcess$1.run(AppLauncherProcess.java:67)

Signal 31 is SIGUSR2. AFAICT this is used by RoboVM to unblock threads blocked on I/O. See AsynchronousSocketCloseMonitor.cpp

I am installing Crashlytics using the installSignals API, with preservePorts = true. Perhaps SIGUSR2 is not being handled / chained / whatever?

If I perform the exact same sequence but Crashlytics is NOT installed, then the problem is not reproduced.

Reproduction steps/code

Sample code available in comment below.

Configuration

Build Tools:

• IDEA plugin
• Eclipse plugin
• Gradle plugin

Versions:

• Robovm: 2.3.6
• XCode: 10.1
• JDK: 1.8

Build Targets:

All iPhone models.