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-rw-r--r--tree-diff.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/tree-diff.c b/tree-diff.c
index fe9f52c479..4d85fef5d0 100644
--- a/tree-diff.c
+++ b/tree-diff.c
@@ -85,6 +85,8 @@ static int compare_tree_entry(struct tree_desc *t1, struct tree_desc *t2, const
/*
* Is a tree entry interesting given the pathspec we have?
*
+ * Pre-condition: baselen == 0 || base[baselen-1] == '/'
+ *
* Return:
* - 2 for "yes, and all subsequent entries will be"
* - 1 for yes