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.
Created attachment 25568 [details]
When debugging an android application, the crash at the end of this issue happens. It does not happen when no debugger is attached.
It's happening on VS2017 15.5 Pre3, but has been happening since Pre1, and I do not yet have a simple repro to provide.
The only log that appears consistently before crashing is :
Loaded assembly: System.Numerics.dll [External]
The following stack trace appears on a X86 Api 24 simulator :
A/(7131): * Assertion at /Users/builder/jenkins/workspace/xamarin-android/xamarin-android/external/mono/mono/mini/mini-codegen.c:1265, condition `reginfo [sreg].born_in > 0' not met
A/libc(7131): Fatal signal 6 (SIGABRT), code -6 in tid 7131 (XXXX.XXXX)
W/(1235): debuggerd: handling request: pid=7131 uid=10088 gid=10088 tid=7131
A/DEBUG(7163): *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
A/DEBUG(7163): Build fingerprint: 'google/sdk_google_phone_x86/generic_x86:7.0/NYC/4310596:userdebug/dev-keys'
A/DEBUG(7163): Revision: '0'
A/DEBUG(7163): ABI: 'x86'
A/DEBUG(7163): pid: 7131, tid: 7131, name: ive.XXXX >>> com.XXXX.XXXX <<<
A/DEBUG(7163): signal 6 (SIGABRT), code -6 (SI_TKILL), fault addr --------
A/DEBUG(7163): Abort message: '* Assertion at /Users/builder/jenkins/workspace/xamarin-android/xamarin-android/external/mono/mono/mini/mini-codegen.c:1265, condition `reginfo [sreg].born_in > 0' not met
A/DEBUG(7163): eax 00000000 ebx 00001bdb ecx 00001bdb edx 00000006
A/DEBUG(7163): esi b60eb58c edi b60eb534
A/DEBUG(7163): xcs 00000073 xds 0000007b xes 0000007b xfs 0000003b xss 0000007b
A/DEBUG(7163): eip b6018424 ebp bfff04f8 esp bfff049c flags 00000292
A/DEBUG(7163): #00 pc ffffe424 [vdso:b6018000] (__kernel_vsyscall+16)
A/DEBUG(7163): #01 pc 0007a00c /system/lib/libc.so (tgkill+28)
A/DEBUG(7163): #02 pc 00075855 /system/lib/libc.so (pthread_kill+85)
A/DEBUG(7163): #03 pc 0002782a /system/lib/libc.so (raise+42)
A/DEBUG(7163): #04 pc 0001ee06 /system/lib/libc.so (abort+86)
A/DEBUG(7163): #05 pc 00277905 /data/app/com.XXXX.XXXX-1/lib/x86/libmonosgen-2.0.so
Also, this does not seem to happen on a ARM64 device.
Does this happen consistently, or is it random ?
It's happening consistently, always with System.Numerics.dll loaded right before.
Created attachment 25604 [details]
Here's the crashing part:
Executing this will make the error mentioned above.
Does this have any relation with the fact that System.Numerics are now intrinsics?
It probably does.
I can reproduce with the testcase using xam.android Version: 188.8.131.52 (Visual Studio Community).
As a workaround, you can execute:
adb shell setprop debug.mono.runtime_args "-O=-simd"
Where adb is in
Unfortunately, this needs to be executed every time the emulator is restarted.
That's good enough of a workaround, thanks for the fast turnaround!
Merged in master with https://github.com/mono/mono/commit/d59f8a64ae0f8994c2ce9087019e7a1070733ab6