Remove unnecessary after_run function

It's called at the same time and in the same place as `after_krate`, so
they can be combined.

src/librustdoc/formats/renderer.rs

@@ -38,10 +38,14 @@ crate trait FormatRenderer<'tcx>: Clone {
     fn mod_item_out(&mut self, item_name: &str) -> Result<(), Error>;
 
     /// Post processing hook for cleanup and dumping output to files.
-    fn after_krate(&mut self, krate: &clean::Crate, cache: &Cache) -> Result<(), Error>;
-
-    /// Called after everything else to write out errors.
-    fn after_run(&mut self, diag: &rustc_errors::Handler) -> Result<(), Error>;
+    ///
+    /// A handler is available if the renderer wants to report errors.
+    fn after_krate(
+        &mut self,
+        krate: &clean::Crate,
+        cache: &Cache,
+        diag: &rustc_errors::Handler,
+    ) -> Result<(), Error>;
 }
 
 /// Main method for rendering a crate.
@@ -104,6 +108,5 @@ crate fn run_format<'tcx, T: FormatRenderer<'tcx>>(
         }
     }
 
-    format_renderer.after_krate(&krate, &cache)?;
-    format_renderer.after_run(diag)
+    format_renderer.after_krate(&krate, &cache, diag)
 }

src/librustdoc/html/render/mod.rs

@@ -523,17 +523,12 @@ impl<'tcx> FormatRenderer<'tcx> for Context<'tcx> {
         Ok((cx, krate))
     }
 
-    fn after_run(&mut self, diag: &rustc_errors::Handler) -> Result<(), Error> {
-        Arc::get_mut(&mut self.shared).unwrap().fs.close();
-        let nb_errors = self.errors.iter().map(|err| diag.struct_err(&err).emit()).count();
-        if nb_errors > 0 {
-            Err(Error::new(io::Error::new(io::ErrorKind::Other, "I/O error"), ""))
-        } else {
-            Ok(())
-        }
-    }
-
-    fn after_krate(&mut self, krate: &clean::Crate, cache: &Cache) -> Result<(), Error> {
+    fn after_krate(
+        &mut self,
+        krate: &clean::Crate,
+        cache: &Cache,
+        diag: &rustc_errors::Handler,
+    ) -> Result<(), Error> {
         let final_file = self.dst.join(&*krate.name.as_str()).join("all.html");
         let settings_file = self.dst.join("settings.html");
         let crate_name = krate.name;
@@ -596,7 +591,15 @@ impl<'tcx> FormatRenderer<'tcx> for Context<'tcx> {
             &style_files,
         );
         self.shared.fs.write(&settings_file, v.as_bytes())?;
-        Ok(())
+
+        // Flush pending errors.
+        Arc::get_mut(&mut self.shared).unwrap().fs.close();
+        let nb_errors = self.errors.iter().map(|err| diag.struct_err(&err).emit()).count();
+        if nb_errors > 0 {
+            Err(Error::new(io::Error::new(io::ErrorKind::Other, "I/O error"), ""))
+        } else {
+            Ok(())
+        }
     }
 
     fn mod_item_in(

src/librustdoc/json/mod.rs

@@ -199,7 +199,12 @@ impl<'tcx> FormatRenderer<'tcx> for JsonRenderer<'tcx> {
         Ok(())
     }
 
-    fn after_krate(&mut self, krate: &clean::Crate, cache: &Cache) -> Result<(), Error> {
+    fn after_krate(
+        &mut self,
+        krate: &clean::Crate,
+        cache: &Cache,
+        _diag: &rustc_errors::Handler,
+    ) -> Result<(), Error> {
         debug!("Done with crate");
         let mut index = (*self.index).clone().into_inner();
         index.extend(self.get_trait_items(cache));
@@ -245,8 +250,4 @@ impl<'tcx> FormatRenderer<'tcx> for JsonRenderer<'tcx> {
         serde_json::ser::to_writer(&file, &output).unwrap();
         Ok(())
     }
-
-    fn after_run(&mut self, _diag: &rustc_errors::Handler) -> Result<(), Error> {
-        Ok(())
-    }
 }