Revert "Pupil persisting problem"
This reverts commit 57853172b5a545ed71b9c36c8a874e98b998c5c1.
Revert "Reproducing error 629"
This reverts commit 2a40e887cc9a2b77b162555b08d1394cb34a2d8e.
Reproducing error 629
Pupil persisting problem
Trying to set up a test case for #629, new problem with "silent" crash