Notice (2018-05-24): bugzilla.xamarin.com is now in
Please join us on
Visual Studio Developer Community and in the
Mono organizations on
GitHub to continue tracking issues. Bugzilla will remain
available for reference in read-only mode. We will continue to work
on open Bugzilla bugs, copy them to the new locations
as needed for follow-up, and add the new items under Related
Our sincere thanks to everyone who has contributed on this bug
tracker over the years. Thanks also for your understanding as we
make these adjustments and improvements for the future.
Please create a new report on
Developer Community or GitHub with
your current version information, steps to reproduce, and relevant error
messages or log files if you are hitting an issue that looks similar to
this resolved bug and you do not yet see a matching new report.
Zoltan, can you have a look?
I can reproduce the crash with current stable (22.214.171.124) with both simulator (both i386 and x86_64) and device.
With maccore master I can only reproduce the crash with the simulators, not on device.
Unfortunately the crash report isn't very helpful (to me at least), and attaching a debugger doesn't help much since it'll run into the expected breakpoint signals.
Crash report (using maccore/master): https://gist.github.com/rolfbjarne/0dd048aa65ce7fcbf58b
That library seems to install its own signal handlers, which is probably whats causing the crash:
* thread #1: tid = 0x16b275, 0x00000001966730f0 libsystem_c.dylib`sigaction, queue = 'com.apple.main-thread', stop reason = breakpoint 1.2
* frame #0: 0x00000001966730f0 libsystem_c.dylib`sigaction
frame #1: 0x0000000100456a5c iOSSample`-[PLCrashSignalHandler registerHandlerWithSignal:error:] + 272
frame #2: 0x0000000100456bfc iOSSample`-[PLCrashSignalHandler registerHandlerForSignal:callback:context:error:] + 40
frame #3: 0x0000000100459954 iOSSample`-[PLCrashReporter enableCrashReporterAndReturnError:] + 780
frame #4: 0x0000000100437ebc iOSSample`-[ADEumCrashReporter enableCrashReporting] + 104
frame #5: 0x00000001004558b4 iOSSample`-[ADEumCrashReportingFeature init] + 204
frame #6: 0x00000001004557ac iOSSample`-[ADEumCrashReportingFeatureFactory createFeature] + 32
The reason this doesn't happen on cycle6 is that we no longer use signals to implement debugging on arm64.
Zoltan is right, the library is installing it's own crash reporter, which interferes with our debugger.
The workaround is explained here: http://stackoverflow.com/a/14499336/183422