More debugging.

Author: sunfishcode

cap-primitives/src/windows/fs/open_unchecked.rs

@@ -89,6 +89,7 @@ fn open_at(start: &fs::File, path: &Path, opts: &OpenOptions) -> io::Result<fs::
             Component::CurDir => (),
         }
     }
+    dbg!(&rebuilt);
 
     let mut wide = OsStr::encode_wide(rebuilt.as_os_str()).collect::<Vec<u16>>();
 

tests/fs_additional.rs

@@ -1058,6 +1058,24 @@ fn dotdot_in_middle_of_symlink() {
     assert_eq!(data, foo);
 }
 
+/// Same as `dotdot_in_middle_of_symlink`, but use two levels of `..`.
+#[test]
+fn hack() {
+    let tmpdir = tmpdir();
+
+    let foo = b"foo";
+    check!(tmpdir.write("target", foo));
+    check!(tmpdir.create_dir_all("b/c"));
+    let b = check!(tmpdir.open_dir("b"));
+    check!(symlink_dir("c\\..\\..", &b, "up"));
+
+    let path = "b/up/target";
+    let mut file = check!(tmpdir.open(path));
+    let mut data = Vec::new();
+    check!(file.read_to_end(&mut data));
+    assert_eq!(data, foo);
+}
+
 /// Same as `dotdot_in_middle_of_symlink`, but use two levels of `..`.
 #[test]
 fn dotdot_more_in_middle_of_symlink() {