Question

PhpUnit is currently not showing the stack trace for PHP errors that occur in the code.

How do I configure it to do so?

Answer 1

PHPUnit uses an error handler function to trap and display errors, but from the PHP manual on error handlers,

The following error types cannot be
handled with a user defined function:
E_ERROR, E_PARSE, E_CORE_ERROR,
E_CORE_WARNING, E_COMPILE_ERROR,
E_COMPILE_WARNING, and most of
E_STRICT raised in the file where
set_error_handler() is called.

If you are running tests in a separate process, PHPUnit will get the error and message from the interpreter, but there will be no stack trace available. This is simply a limitation of the PHP interpreter. Fatal means fatal.