Pin Rust to 1.49.0 on CI

.github/workflows/ci.yaml

@@ -53,11 +53,19 @@ jobs:
     - name: Install Rust toolchain
       uses: actions-rs/toolchain@v1
       with:
-        toolchain: stable
+        toolchain: 1.49.0   # FIXME: CI is failing on 1.50
         profile: minimal
         override: true
         components: rustfmt, rust-src
 
+    - name: Install rustfmt
+      uses: actions-rs/toolchain@v1
+      with:
+        toolchain: stable
+        profile: minimal
+        override: false
+        components: rustfmt
+
     - name: Cache cargo directories
       uses: actions/cache@v2
       with:

crates/ide/src/references/rename.rs

@@ -415,9 +415,9 @@ fn rename_reference(
 ) -> RenameResult<SourceChange> {
     let ident_kind = check_identifier(new_name)?;
 
-    let def_is_lbl_or_lt = matches!(def,
-        Definition::GenericParam(hir::GenericParam::LifetimeParam(_))
-        | Definition::Label(_)
+    let def_is_lbl_or_lt = matches!(
+        def,
+        Definition::GenericParam(hir::GenericParam::LifetimeParam(_)) | Definition::Label(_)
     );
     match (ident_kind, def) {
         (IdentifierKind::ToSelf, _)

crates/parser/src/grammar/params.rs

@@ -169,7 +169,8 @@ fn opt_self_param(p: &mut Parser, m: Marker) {
         let la1 = p.nth(1);
         let la2 = p.nth(2);
         let la3 = p.nth(3);
-        if !matches!((p.current(), la1, la2, la3),
+        if !matches!(
+            (p.current(), la1, la2, la3),
             (T![&], T![self], _, _)
                 | (T![&], T![mut], T![self], _)
                 | (T![&], LIFETIME_IDENT, T![self], _)

crates/rust-analyzer/src/to_proto.rs

@@ -528,7 +528,8 @@ pub(crate) fn url_from_abs_path(path: &Path) -> lsp_types::Url {
     assert!(path.is_absolute());
     let url = lsp_types::Url::from_file_path(path).unwrap();
     match path.components().next() {
-        Some(path::Component::Prefix(prefix)) if matches!(prefix.kind(), path::Prefix::Disk(_) | path::Prefix::VerbatimDisk(_)) =>
+        Some(path::Component::Prefix(prefix))
+            if matches!(prefix.kind(), path::Prefix::Disk(_) | path::Prefix::VerbatimDisk(_)) =>
         {
             // Need to lowercase driver letter
         }