The current behaviour of prefix_path is to return an empty string if
prefixing and absolute path that only contains exactly the work tree.
This behaviour is a potential regression point.

Signed-off-by: Martin Erik Werner <>
 t/ | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/t/ b/t/
index 0bba988..b8e92e1 100755
--- a/t/
+++ b/t/
@@ -195,6 +195,12 @@ test_expect_failure SYMLINKS 'prefix_path works with 
absolute paths to work tree
        test "$(test-path-utils prefix_path prefix "$(pwd)/symlink")" = 
+test_expect_success 'prefix_path works with only absolute path to work tree' '
+       echo "" >expected &&
+       test-path-utils prefix_path prefix "$(pwd)" >actual &&
+       test_cmp expected actual
 relative_path /foo/a/b/c/      /foo/a/b/       c/
 relative_path /foo/a/b/c/      /foo/a/b        c/
 relative_path /foo/a//b//c/    ///foo/a/b//    c/              POSIX

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