From 978c13aa02d5a46200715e58e9478fcbe6e67ef8 Mon Sep 17 00:00:00 2001
From: QuietMisdreavus <grey@quietmisdreavus.net>
Date: Tue, 14 Aug 2018 15:19:15 -0500
Subject: [PATCH] pull local types from the HIR instead of tcx

---
 src/librustdoc/clean/inline.rs | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/src/librustdoc/clean/inline.rs b/src/librustdoc/clean/inline.rs
index 08373695b32c..5205b0d34559 100644
--- a/src/librustdoc/clean/inline.rs
+++ b/src/librustdoc/clean/inline.rs
@@ -315,7 +315,16 @@ pub fn build_impl(cx: &DocContext, did: DefId, ret: &mut Vec<clean::Item>) {
         }
     }
 
-    let for_ = tcx.type_of(did).clean(cx);
+    let for_ = if let Some(nodeid) = tcx.hir.as_local_node_id(did) {
+        match tcx.hir.expect_item(nodeid).node {
+            hir::ItemKind::Impl(.., ref t, _) => {
+                t.clean(cx)
+            }
+            _ => panic!("did given to build_impl was not an impl"),
+        }
+    } else {
+        tcx.type_of(did).clean(cx)
+    };
 
     // Only inline impl if the implementing type is
     // reachable in rustdoc generated documentation