When symlinks in the working tree are manipulated using the absolute
path, git dereferences them, and tries to manipulate the link target

This is a regression introduced by 18e051a:
  setup: translate symlinks in filename when using absolute paths
(which did not take symlinks in the work tree into consideration).

Add a known-breakage tests using the prefix_path function, which
currently uses real_path, causing the dereference.

Signed-off-by: Martin Erik Werner <martinerikwer...@gmail.com>
 t/t0060-path-utils.sh | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/t/t0060-path-utils.sh b/t/t0060-path-utils.sh
index 07c10c8..0bba988 100755
--- a/t/t0060-path-utils.sh
+++ b/t/t0060-path-utils.sh
@@ -190,6 +190,11 @@ test_expect_success SYMLINKS 'real path works on symlinks' 
        test "$sym" = "$(test-path-utils real_path "$dir2/syml")"
+test_expect_failure SYMLINKS 'prefix_path works with absolute paths to work 
tree symlinks' '
+       ln -s target symlink &&
+       test "$(test-path-utils prefix_path prefix "$(pwd)/symlink")" = 
 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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