Reviewer requested changes and test fixes

Author: Nick Cameron

src/librustc/session/mod.rs

@@ -179,13 +179,13 @@ impl Session {
     pub fn track_errors<F, T>(&self, f: F) -> Result<T, usize>
         where F: FnOnce() -> T
     {
-        let count = self.err_count();
+        let old_count = self.err_count();
         let result = f();
-        let count = self.err_count() - count;
-        if count == 0 {
+        let errors = self.err_count() - old_count;
+        if errors == 0 {
             Ok(result)
         } else {
-            Err(count)
+            Err(errors)
         }
     }
     pub fn span_warn<S: Into<MultiSpan>>(&self, sp: S, msg: &str) {

src/librustc_driver/test.rs

@@ -132,7 +132,7 @@ fn test_env<F>(source_string: &str,
     ty::ctxt::create_and_enter(&sess,
                                &arenas,
                                def_map,
-                               named_region_map,
+                               named_region_map.unwrap(),
                                ast_map,
                                freevars,
                                region_map,

src/librustdoc/core.rs

@@ -153,7 +153,7 @@ pub fn run_core(search_paths: SearchPaths, cfgs: Vec<String>, externs: Externs,
                                                      &arenas,
                                                      &name,
                                                      resolve::MakeGlobMap::No,
-                                                     |tcx, _, analysis| {
+                                                     |tcx, _, analysis, _| {
         let _ignore = tcx.dep_graph.in_ignore();
         let ty::CrateAnalysis { access_levels, .. } = analysis;
 

src/test/run-make/execution-engine/test.rs

@@ -242,9 +242,9 @@ fn compile_program(input: &str, sysroot: PathBuf)
 
         abort_on_err(driver::phase_3_run_analysis_passes(
             &sess, &cstore, ast_map, &arenas, &id,
-            MakeGlobMap::No, |tcx, mir_map, analysis| {
+            MakeGlobMap::No, |tcx, mir_map, analysis, _| {
 
-            let trans = driver::phase_4_translate_to_llvm(tcx, mir_map, analysis);
+            let trans = driver::phase_4_translate_to_llvm(tcx, mir_map.unwrap(), analysis);
 
             let crates = tcx.sess.cstore.used_crates(LinkagePreference::RequireDynamic);