Submitted by jbrown on Tue, 2010/09/21 - 14:42.
Earlier this year Drupal core developers were getting a strange error message while developing Drupal 7:
Fatal error: Exception thrown without a stack frame in Unknown on line 0
This was causing a lot of head scratching because it doesn't provide any information about what caused it.
Drupal 7 uses exceptions more than any previous version of Drupal and this turned out to be the problem.
PHP exceptions are handled in one of two ways: