Tests

src/libsyntax/parse/parser.rs

@@ -2841,7 +2841,12 @@ impl<'a> Parser<'a> {
                 maybe_whole!(deref self, NtTT);
                 match self.token {
                     token::CloseDelim(_) => {
-                        panic!("should have been caught above");
+                        // An unexpected closing delimiter (i.e., there is no
+                        // matching opening delimiter).
+                        let token_str = self.this_token_to_string();
+                        let err = self.diagnostic().struct_span_err(self.span,
+                            &format!("unexpected close delimiter: `{}`", token_str));
+                        Err(err)
                     },
                     /* we ought to allow different depths of unquotation */
                     token::Dollar | token::SubstNt(..) if self.quote_depth > 0 => {

src/test/compile-fail/issue-10636-2.rs

@@ -1,4 +1,4 @@
-// Copyright 2013 The Rust Project Developers. See the COPYRIGHT
+// Copyright 2013-2016 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
@@ -11,11 +11,9 @@
 // FIXME(31528) we emit a bunch of silly errors here due to continuing past the
 // first one. This would be easy-ish to address by better recovery in tokenisation.
 
-// compile-flags: -Z parse-only
-
-pub fn trace_option(option: Option<isize>) { //~ HELP did you mean to close this delimiter?
+pub fn trace_option(option: Option<isize>) {
     option.map(|some| 42; //~ NOTE: unclosed delimiter
                           //~^ ERROR: expected one of
+                          //~^^ ERROR: mismatched types
 } //~ ERROR: incorrect close delimiter
 //~^ ERROR: expected one of
-//~ ERROR: this file contains an un-closed delimiter

src/test/compile-fail/issue-31804.rs

@@ -0,0 +1,16 @@
+// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// Test that error recovery in the parser to an EOF does not give an infinite
+// spew of errors.
+
+fn main() {
+    let
+} //~ ERROR unexpected token: `}`

src/test/compile-fail/token-error-correct-2.rs

@@ -0,0 +1,17 @@
+// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// Test that we do some basic error correcton in the tokeniser (and don't ICE).
+
+fn main() {
+    if foo { //~ NOTE: unclosed delimiter
+    //~^ ERROR: unresolved name `foo`
+    ) //~ ERROR: incorrect close delimiter: `)`
+}

src/test/compile-fail/token-error-correct-3.rs

@@ -0,0 +1,33 @@
+// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// Test that we do some basic error correcton in the tokeniser (and don't spew
+// too many bogus errors).
+
+pub mod raw {
+    use std::{io, fs};
+    use std::path::Path;
+
+    pub fn ensure_dir_exists<P: AsRef<Path>, F: FnOnce(&Path)>(path: P,
+                                                               callback: F)
+                                                               -> io::Result<bool> {
+        if !is_directory(path.as_ref()) { //~ ERROR: unresolved name `is_directory`
+            callback(path.as_ref();  //~ NOTE: unclosed delimiter
+                     //~^ ERROR: expected one of
+            fs::create_dir_all(path.as_ref()).map(|()| true) //~ ERROR: expected one of
+        } else { //~ ERROR: incorrect close delimiter: `}`
+            Ok(false);
+        }
+
+        panic!();
+    }
+}
+
+fn main() {}

src/test/compile-fail/token-error-correct.rs

@@ -0,0 +1,20 @@
+// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// Test that we do some basic error correcton in the tokeniser.
+
+fn main() {
+    foo(bar(; //~ NOTE: unclosed delimiter
+    //~^ NOTE: unclosed delimiter
+    //~^^ ERROR: unexpected token: `;`
+    //~^^^ ERROR: unresolved name `bar`
+    //~^^^^ ERROR: unresolved name `foo`
+} //~ ERROR: incorrect close delimiter: `}`
+//~^ ERROR: incorrect close delimiter: `}`

src/test/parse-fail/issue-2354-1.rs

@@ -10,4 +10,4 @@
 
 // compile-flags: -Z parse-only
 
-static foo: isize = 2; } //~ ERROR incorrect close delimiter:
+static foo: isize = 2; } //~ ERROR unexpected close delimiter:

src/test/parse-fail/macro-mismatched-delim-paren-brace.rs

@@ -14,4 +14,4 @@ fn main() {
     foo! (
         bar, "baz", 1, 2.0
     } //~ ERROR incorrect close delimiter
-}
+} //~ ERROR unexpected close delimiter: `}`