fsmonitor: execute setup procedures only if dirstate is already instantiated Before this patch, reposetup() of fsmonitor executes setup procedures for dirstate, even if it isn't yet instantiated at that time. On the other hand, dirstate might be already instantiated before reposetup() intentionally (prefilling by chg, for example, see bf3af0eced44 for detail). If so, just discarding already instantiated one in reposetup() causes issue. To resolve both issues above, this patch executes setup procedures, only if dirstate is already instantiated. BTW, this patch removes "del repo.unfiltered().__dict__['dirstate']", because it is responsibility of the code path, which causes instantiation of dirstate before reposetup(). After this patch, using localrepo.isfilecached() should avoid creating the corresponded entry in repo.unfiltered().__dict__.