set ptr to nil after free

1 files changed, 1 insertions, 0 deletions

diff --git a/patch.go b/patch.go
index 880f088..d927109 100644
--- a/patch.go
+++ b/patch.go
@@ -31,6 +31,7 @@ func (patch *Patch) Free() error {
 	}
 	runtime.SetFinalizer(patch, nil)
 	C.git_patch_free(patch.ptr)
+	patch.ptr = nil
 	return nil
 }