Encountering BCL test failures in System.Numerics.Tests on Android when AOT + LLVM are enabled

[pjcollins]

I'm seeing failures in the following new XUnit tests when AOT and LLVM are enabled. Failure messages and stack traces can be found in the test result xml linked at the bottom.

System.Numerics.Tests.Matrix4x4Tests.Matrix4x4CreateReflectionTest01
System.Numerics.Tests.Matrix4x4Tests.Matrix4x4CreateShadowTest02
System.Numerics.Tests.PlaneTests.PlaneConstructorTest
System.Numerics.Tests.PlaneTests.PlaneConstructorTest1
System.Numerics.Tests.PlaneTests.PlaneConstructorTest3
System.Numerics.Tests.PlaneTests.PlaneCreateFromVerticesTest
System.Numerics.Tests.PlaneTests.PlaneEqualityTest
System.Numerics.Tests.PlaneTests.PlaneEqualsNanTest
System.Numerics.Tests.PlaneTests.PlaneInequalityTest

Steps to Reproduce

1. Download prebuilt .apk file, and run it on an armeabi-v8a device:

adb install 15-7-aotllvm-Xamarin.Android.Bcl_Tests-Signed.apk
adb shell am instrument -w Xamarin.Android.Bcl_Tests/xamarin.android.bcltests.XUnitInstrumentation

2. Alternatively, a smaller repro which contains the relevant test source could likely be built and installed with AOT+LLVM enabled.

Details

Link to .apk file - https://microsoft-my.sharepoint.com/:u:/p/pecolli/EYrN-tuwhJFJmkrnwj5vAgIBzEQFPGZkCUcmSkNMJUYMUg?e=LBt3gv
Link to obj output - https://microsoft-my.sharepoint.com/:u:/p/pecolli/EXGoMM2LZURMhg8mPY8IUyoBgDudDiDsjXrLA86zaPjHSQ?e=3YL4a8

Version Information

Windows 10 w/ VS 15.7
Xamarin.Android SDK 8.3.0.5 (HEAD/1a8ed5388)

Log File

https://gist.githubusercontent.com/pjcollins/bdb1339e280e64e64cf9d9400f0640a4/raw/40416b509416840f94fe42e908ae427d320aa6e0/BclXUnit_release_aot_llvmTestResult.xml

[pjcollins]

Adding to d15-7 as these failures occur in newly added tests in this release and it would be good to get some sort of assessment of severity that is not dependent on historical data before shipping.

[grendello]

This is likely a duplicate of #1452 (and possibly #1444). The same assessment applies.

[luhenry]

/cc @vargaz could you please take a look?

[pjcollins]

I'm going to remove the d15-7 milestone at this point based on related severity/priority discussions.

[pjcollins]

I'm no longer able to reproduce this with mono/2018-02. Resolving.