window-tests failure

I'm getting the following failure with the newly-added window-test:

$ subversion/tests/libsvn_delta/window-test
expected: f6fd44565e14c6e44b35292719deb77e
  actual: f6fd44565e14c6e44b35292719deb77e
Segmentation fault

The segmentation fault backtrace is:
(gdb) backtrace
#0 0x002591a9 in run_cleanups ()
#1 0x00259fa3 in apr_pool_clear ()
#2 0x00003399 in main (argc=1, argv=0xbffff7a8) at
subversion/tests/svn_test_main.c:397

It looks like an error may be leaking somewhere, causing the segfault.

I'm not sure why the checksums are not being evaluated as equal, nor if the
problem is in the library or the test.

-Hyrum