Auto merge of rust-lang#33702 - crimsun:pr33678, r=alexcrichton

Resolved rustdoc crash (rust-lang#33678) by aborting instead of unwrapping.

Also removed Option use and comment to match.

Fixes rust-lang#33678

Author: bors

src/librustdoc/core.rs

@@ -173,9 +173,8 @@ pub fn run_core(search_paths: SearchPaths,
                                                      &arenas,
                                                      &name,
                                                      |tcx, _, analysis, result| {
-        // Return if the driver hit an err (in `result`)
         if let Err(_) = result {
-            return None
+            sess.fatal("Compilation failed, aborting rustdoc");
         }
 
         let ty::CrateAnalysis { access_levels, .. } = analysis;
@@ -206,6 +205,6 @@ pub fn run_core(search_paths: SearchPaths,
             v.clean(&ctxt)
         };
 
-        Some((krate, ctxt.renderinfo.into_inner()))
-    }), &sess).unwrap()
+        (krate, ctxt.renderinfo.into_inner())
+    }), &sess)
 }