Exceptions in test code are missed

Exceptions that occur inside test functions are completely missed. This creates issues like test failing but makes it completely unclear where the failure occured. The exceptions should be catched and a stack trace should be printed for any exception that happens inside a test method.

Start by locating the code that invokes test functions and reports their results, then reproduce the issue with a test that throws an exception. Done means exceptions from test functions are caught and their stack traces are printed so the failing test location is clear.

Written by the indexing model from the issue text.