reexport errors from syntax. fix failing cfail test

src/libsyntax/diagnostics/plugin.rs

@@ -23,6 +23,8 @@ use util::small_vector::SmallVector;
 
 use diagnostics::metadata::output_metadata;
 
+pub use errors::*;
+
 // Maximum width of any line in an extended error description (inclusive).
 const MAX_DESCRIPTION_WIDTH: usize = 80;
 

src/libsyntax/lib.rs

@@ -40,11 +40,12 @@ extern crate libc;
 #[macro_use] extern crate log;
 #[macro_use] #[no_link] extern crate rustc_bitflags;
 extern crate rustc_unicode;
-extern crate rustc_errors as errors;
+pub extern crate rustc_errors as errors;
 extern crate syntax_pos;
 
 extern crate serialize as rustc_serialize; // used by deriving
 
+
 // A variant of 'try!' that panics on an Err. This is used as a crutch on the
 // way towards a non-panic!-prone parser. It should be used for fatal parsing
 // errors; eventually we plan to convert all code using panictry to just use

src/test/compile-fail-fulldeps/qquote.rs

@@ -18,7 +18,7 @@ extern crate syntax_pos;
 use syntax::ast;
 use syntax::parse;
 use syntax::print::pprust;
-use syntax_pos::{self, DUMMY_SP};
+use syntax_pos::DUMMY_SP;
 
 fn main() {
     let ps = syntax::parse::ParseSess::new();