Copy note from leakers README here too. We want to keep all test cases.

Lib/test/crashers/README

@@ -13,3 +13,8 @@ Each test should have a link to the bug report:
 Put as much info into a docstring or comments to help determine
 the cause of the failure.  Particularly note if the cause is
 system or environment dependent and what the variables are.
+
+Once the crash is fixed, the test case should be moved into an appropriate
+test (even if it was originally from the test suite).  This ensures the
+regression doesn't happen again.  And if it does, it should be easier
+to track down.