diff --git a/crates/moon-util/src/rel_path.rs b/crates/moon-util/src/rel_path.rs
index e0e2625..8e15c39 100644
--- a/crates/moon-util/src/rel_path.rs
+++ b/crates/moon-util/src/rel_path.rs
@@ -52,6 +52,11 @@ impl RelPath {
     #[track_caller]
     pub fn new<'a>(path: &'a Path, path_style: PathStyle) -> Result<Cow<'a, Self>> {
         let mut path = path.to_str().context("non utf-8 path")?;
+        // Check before trimming trailing separators: trimming turns the drive
+        // root `C:\` into `C:`, which no longer reads as absolute.
+        if is_absolute(path, path_style) {
+            return Err(anyhow!("absolute path not allowed: {path:?}"));
+        }
 
         let (prefixes, suffixes): (&[_], &[_]) = match path_style {
             PathStyle::Posix => (&["./"], &['/']),
diff --git a/crates/moon-util/src/rel_path/rel_path_tests.rs b/crates/moon-util/src/rel_path/rel_path_tests.rs
index 97136a3..c23976c 100644
--- a/crates/moon-util/src/rel_path/rel_path_tests.rs
+++ b/crates/moon-util/src/rel_path/rel_path_tests.rs
@@ -221,3 +221,19 @@ fn from_proto_accepts_only_an_already_normalized_relative_path() {
         "an absolute path is not a relative wire path"
     );
 }
+
+/// Catches `RelPath::new` stripping trailing separators before it checks for an
+/// absolute path, so the Windows drive root `C:\` (absolute by
+/// `paths::is_absolute`: drive letter, colon, separator) loses its separator and
+/// is accepted as the relative path `C:`. `C:\foo` and `C:\.` are rejected, so
+/// the bare root must be too; a caller such as `PathStyle::strip_prefix` would
+/// otherwise hand out a drive root as a path inside the worktree.
+#[test]
+fn new_rejects_a_windows_drive_root() {
+    for root in ["C:\\", "C:/", "d:\\\\"] {
+        assert!(
+            super::RelPath::new(std::path::Path::new(root), PathStyle::Windows).is_err(),
+            "{root:?} is an absolute drive root, not a relative path"
+        );
+    }
+}
diff --git a/docs/MOON_PATCH_QUEUE.md b/docs/MOON_PATCH_QUEUE.md
index 2b2fe98..237368d 100644
--- a/docs/MOON_PATCH_QUEUE.md
+++ b/docs/MOON_PATCH_QUEUE.md
@@ -57,6 +57,13 @@ cargo xtask transform --zed-tag v0.0.0 --zed-path R:\test\_zed_gpui_base_84b753
    - regular pointer tooltips require 800 ms of continuous hover, expire after
      five visible seconds, and stay suppressed until pointer re-entry; hoverable
      tooltips remain persistent while either their trigger or content is hovered.
+     A mouse press on the trigger of a regular tooltip hides it, or cancels the
+     pending show, and keeps it suppressed until the pointer leaves the trigger,
+     even with the button still held (`TooltipTrigger` in
+     `moon-gpui/src/elements/div.rs`: `check_can_show` gates showing,
+     `check_is_hovered` clears the suppression). Upstream only clears the
+     tooltip on press; after the release the next pointer move over the
+     trigger schedules it again without the pointer leaving.
    - `UniformList::on_visible_range`: a channel for observing the item range the
      list draws. The renderer closure cannot serve as one — `measure_item` runs
      it on a single item, twice per frame, before the real range exists — so a