Fix error blocks

crates/libanalysis/src/lib.rs

@@ -130,6 +130,7 @@ impl WorldState {
     }
 }
 
+#[derive(Debug)]
 pub enum QuickFix {
     CreateFile(PathBuf),
 }

crates/libanalysis/tests/tests.rs

@@ -52,7 +52,8 @@ fn test_unresolved_module_diagnostic() {
     let snap = world.snapshot(|_id, _path| None);
     let diagnostics = snap.diagnostics(FileId(1)).unwrap();
     assert_eq_dbg(
-        r#"[Diagnostic { range: [4; 7), msg: "unresolved module" }]"#,
+        r#"[(Diagnostic { range: [4; 7), msg: "unresolved module" },
+             Some(CreateFile("../foo.rs")))]"#,
         &diagnostics,
     );
 }

crates/libsyntax2/src/grammar/expressions/atom.rs

@@ -269,6 +269,10 @@ fn match_arm_list(p: &mut Parser) {
     let m = p.start();
     p.eat(L_CURLY);
     while !p.at(EOF) && !p.at(R_CURLY) {
+        if p.at(L_CURLY) {
+            error_block(p, "expected match arm");
+            continue;
+        }
         // test match_arms_commas
         // fn foo() {
         //     match () {

crates/libsyntax2/src/grammar/expressions/mod.rs

@@ -433,6 +433,7 @@ fn named_field_list(p: &mut Parser) {
                 p.bump();
                 expr(p);
             }
+            L_CURLY => error_block(p, "expected a field"),
             _ => p.err_and_bump("expected identifier"),
         }
         if !p.at(R_CURLY) {

crates/libsyntax2/src/grammar/items/structs.rs

@@ -56,6 +56,10 @@ fn enum_variant_list(p: &mut Parser) {
     let m = p.start();
     p.bump();
     while !p.at(EOF) && !p.at(R_CURLY) {
+        if p.at(L_CURLY) {
+            error_block(p, "expected enum variant");
+            continue;
+        }
         let var = p.start();
         attributes::outer_attributes(p);
         if p.at(IDENT) {

crates/libsyntax2/src/grammar/items/traits.rs

@@ -30,6 +30,10 @@ fn trait_item_list(p: &mut Parser) {
     let m = p.start();
     p.bump();
     while !p.at(EOF) && !p.at(R_CURLY) {
+        if p.at(L_CURLY) {
+            error_block(p, "expected an item");
+            continue;
+        }
         item_or_macro(p, true, ItemFlavor::Trait);
     }
     p.expect(R_CURLY);
@@ -76,6 +80,10 @@ fn impl_item_list(p: &mut Parser) {
     p.bump();
 
     while !p.at(EOF) && !p.at(R_CURLY) {
+        if p.at(L_CURLY) {
+            error_block(p, "expected an item");
+            continue;
+        }
         item_or_macro(p, true, ItemFlavor::Mod);
     }
     p.expect(R_CURLY);