Repro for NUnit3-vs-adapter #519

The sln contains 3 unit test projects (NUnit, MSTest, xUnit.net) which just 1 bolier plate test method in each. There is also a runsettings file with "UseVerifiableInstrumentation" set to False.

Steps to repro

Command line

• Invoke 't.bat`

VS IDE

• set the runsettings file
• build sln
• select all tests from Test Explorer
• invoke "Analyze Code Coverage for Selected Tests" from the Test Explorer.

Expected

All the runs as seen in t.bat must succeed.

Actual

Running the NUnit tests with the runsettings as the configuration causes a crash from both the command line and from within the VS IDE. It works in the case of the MSTest and xUnit based tests.