using ExtendedGeneratorTest in-process intermittently causes full freeze of MPS

[jennek]

When running a test using ExtendedGeneratorTest in-process, sometimes MPS freezes (need to kill using Task Manager). This does not happen all the time. When you have multiple instances of ExtendedGeneratorTest, it seems like random which instance freezes.

Why do I run these tests in-process? I have two modes of running tests

• in TDD mode: focussing on a particular localized development, running a few tests every few minutes. this I do in-process
• in consolidation mode: checking if all is well after some TDD work, running all tests every few hours. this I do out-of-process.

Expected outcome

• either make this run in-process
• or give a warning that this test cannot run in-process and skip test instead of freezing MPS

No sample project to reproduce attached yet. I can make my project available privately (JMPS_xSBD)