Overview

If a test engine throws an exception during discovery (see https://github.com/junit-team/junit5/blob/master/junit-platform-launcher/src/main/java/org/junit/platform/launcher/core/DefaultLauncher.java#L115) other engines won't be queried any more.

I think this is a bug because one test engine can thereby prevent others from working.

Deliverables

• DefaultLauncher should catch and report exceptions from engines and proceed with other engines.
  • This applies to both the discovery phase and execution phase.

Additional Proposals

• DefaultLauncher could even collect discovery results concurrently.