libgit2/libgit2 — pull request #1098 by scunz (2012-11-23 11:03:19+00:00)
Title: Reset all static variables to NULL in clar's __cleanup

Without this change, any failed assertion in the second (or a later) test
inside a test suite has a chance of double deleting memory, resulting in
a heap corruption. See #1096 for details.

This leaves alone the test cases where we "just" use cl_git_sandbox_init()
and cl_git_sandbox_cleanup(). These methods already take good care to not
double delete a repository.