From 95ee919a2da9da4bc2b2d0fc796dfa57fc4b038d Mon Sep 17 00:00:00 2001
From: Jeffrey Seyfried <jeffrey.seyfried@gmail.com>
Date: Sun, 20 Nov 2016 13:28:31 +0000
Subject: [PATCH] Fix bug in proc-macro dependencies.

---
 src/librustc_metadata/creader.rs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/librustc_metadata/creader.rs b/src/librustc_metadata/creader.rs
index 5384535024e..56def16ea45 100644
--- a/src/librustc_metadata/creader.rs
+++ b/src/librustc_metadata/creader.rs
@@ -366,6 +366,9 @@ impl<'a> CrateLoader<'a> {
         match result {
             LoadResult::Previous(cnum) => {
                 let data = self.cstore.get_crate_data(cnum);
+                if data.root.macro_derive_registrar.is_some() {
+                    dep_kind = DepKind::MacrosOnly;
+                }
                 data.dep_kind.set(cmp::max(data.dep_kind.get(), dep_kind));
                 (cnum, data)
             }