Revert "chore: Bump Rust to 1.89 (#35788)" (#35843)

This reverts commit efba2cbfd3.

Unfortunately, the Docker image for 1.89 has not shown up yet. Once it
has, we should re-land this.

Release Notes:

- N/A

crates/gpui/src/keymap/context.rs

@@ -461,8 +461,6 @@ fn skip_whitespace(source: &str) -> &str {
 
 #[cfg(test)]
 mod tests {
-    use core::slice;
-
     use super::*;
     use crate as gpui;
     use KeyBindingContextPredicate::*;
@@ -676,11 +674,11 @@ mod tests {
         assert!(predicate.eval(&contexts));
 
         assert!(!predicate.eval(&[]));
-        assert!(!predicate.eval(slice::from_ref(&child_context)));
+        assert!(!predicate.eval(&[child_context.clone()]));
         assert!(!predicate.eval(&[parent_context]));
 
         let zany_predicate = KeyBindingContextPredicate::parse("child > child").unwrap();
-        assert!(!zany_predicate.eval(slice::from_ref(&child_context)));
+        assert!(!zany_predicate.eval(&[child_context.clone()]));
         assert!(zany_predicate.eval(&[child_context.clone(), child_context.clone()]));
     }
 
@@ -692,13 +690,13 @@ mod tests {
         let parent_context = KeyContext::try_from("parent").unwrap();
         let child_context = KeyContext::try_from("child").unwrap();
 
-        assert!(not_predicate.eval(slice::from_ref(&workspace_context)));
-        assert!(!not_predicate.eval(slice::from_ref(&editor_context)));
+        assert!(not_predicate.eval(&[workspace_context.clone()]));
+        assert!(!not_predicate.eval(&[editor_context.clone()]));
         assert!(!not_predicate.eval(&[editor_context.clone(), workspace_context.clone()]));
         assert!(!not_predicate.eval(&[workspace_context.clone(), editor_context.clone()]));
 
         let complex_not = KeyBindingContextPredicate::parse("!editor && workspace").unwrap();
-        assert!(complex_not.eval(slice::from_ref(&workspace_context)));
+        assert!(complex_not.eval(&[workspace_context.clone()]));
         assert!(!complex_not.eval(&[editor_context.clone(), workspace_context.clone()]));
 
         let not_mode_predicate = KeyBindingContextPredicate::parse("!(mode == full)").unwrap();
@@ -711,18 +709,18 @@ mod tests {
         assert!(not_mode_predicate.eval(&[other_mode_context]));
 
         let not_descendant = KeyBindingContextPredicate::parse("!(parent > child)").unwrap();
-        assert!(not_descendant.eval(slice::from_ref(&parent_context)));
-        assert!(not_descendant.eval(slice::from_ref(&child_context)));
+        assert!(not_descendant.eval(&[parent_context.clone()]));
+        assert!(not_descendant.eval(&[child_context.clone()]));
         assert!(!not_descendant.eval(&[parent_context.clone(), child_context.clone()]));
 
         let not_descendant = KeyBindingContextPredicate::parse("parent > !child").unwrap();
-        assert!(!not_descendant.eval(slice::from_ref(&parent_context)));
-        assert!(!not_descendant.eval(slice::from_ref(&child_context)));
+        assert!(!not_descendant.eval(&[parent_context.clone()]));
+        assert!(!not_descendant.eval(&[child_context.clone()]));
         assert!(!not_descendant.eval(&[parent_context.clone(), child_context.clone()]));
 
         let double_not = KeyBindingContextPredicate::parse("!!editor").unwrap();
-        assert!(double_not.eval(slice::from_ref(&editor_context)));
-        assert!(!double_not.eval(slice::from_ref(&workspace_context)));
+        assert!(double_not.eval(&[editor_context.clone()]));
+        assert!(!double_not.eval(&[workspace_context.clone()]));
 
         // Test complex descendant cases
         let workspace_context = KeyContext::try_from("Workspace").unwrap();
@@ -756,9 +754,9 @@ mod tests {
 
         // !Workspace - shouldn't match when Workspace is in the context
         let not_workspace = KeyBindingContextPredicate::parse("!Workspace").unwrap();
-        assert!(!not_workspace.eval(slice::from_ref(&workspace_context)));
-        assert!(not_workspace.eval(slice::from_ref(&pane_context)));
-        assert!(not_workspace.eval(slice::from_ref(&editor_context)));
+        assert!(!not_workspace.eval(&[workspace_context.clone()]));
+        assert!(not_workspace.eval(&[pane_context.clone()]));
+        assert!(not_workspace.eval(&[editor_context.clone()]));
         assert!(!not_workspace.eval(&workspace_pane_editor));
     }
 }

crates/gpui/src/platform/windows/wrapper.rs

@@ -1,6 +1,28 @@
 use std::ops::Deref;
 
-use windows::Win32::UI::WindowsAndMessaging::HCURSOR;
+use windows::Win32::{Foundation::HANDLE, UI::WindowsAndMessaging::HCURSOR};
+
+#[derive(Debug, Clone, Copy)]
+pub(crate) struct SafeHandle {
+    raw: HANDLE,
+}
+
+unsafe impl Send for SafeHandle {}
+unsafe impl Sync for SafeHandle {}
+
+impl From<HANDLE> for SafeHandle {
+    fn from(value: HANDLE) -> Self {
+        SafeHandle { raw: value }
+    }
+}
+
+impl Deref for SafeHandle {
+    type Target = HANDLE;
+
+    fn deref(&self) -> &Self::Target {
+        &self.raw
+    }
+}
 
 #[derive(Debug, Clone, Copy)]
 pub(crate) struct SafeCursor {