WVPASS mkdir -p src/x/1 src/y/1
WVPASS bup index -u src
WVFAIL bup save --strip -n foo src/x src/y 2> tmp-err.log
-WVPASS grep -F "error: ignoring duplicate path '1' in '/'" tmp-err.log
+WVPASS grep -F "error: ignoring duplicate path 1 in /" tmp-err.log
WVPASS rm -rf "$tmpdir"