New Post: I have implemented LinearAlgebra.Integer, but ...

I tried to run the "build.sh test" in bash.
It runs for awhile (about 5 min), generates an apparently valid TestResults.xml file, and reports the Failed and Ignored tests and then it gives the error:

Running build failed.
Error:
System.Exception: NUnit test failed (163).
at Fake.NUnitSequential.NUnit(FSharpFunc2 setParams, IEnumerable1 assemblies) in C:\code\fake\src\app\FakeLib\UnitTest\NUnit\Sequential.fs:line 45
at FSI_0001.Build.clo@385-41.Invoke(Unit _arg1) in C:\Users\mheffron\My Documents\GitHub\MathNet\mathnet-numerics\build.fsx:line 385
at Fake.TargetHelper.runTarget@317(String targetName) in C:\code\fake\src\app\FakeLib\TargetHelper.fs:line 331
Status: Failure
1) System.Exception: NUnit test failed (163).
at Fake.NUnitSequential.NUnit(FSharpFunc2 setParams, IEnumerable1 assemblies) in C:\code\fake\src\app\FakeLib\UnitTest\NUnit\Sequential.fs:line 45
at FSI_0001.Build.clo@385-41.Invoke(Unit _arg1) in C:\Users\mheffron\My Documents\GitHub\MathNet\mathnet-numerics\build.fsx:line 385
at Fake.TargetHelper.runTarget@317(String targetName) in C:\code\fake\src\app\FakeLib\TargetHelper.fs:line 331

So what happened?