From 814e6e60f9f0922b0cfa720102a23e0b7a5a0828 Mon Sep 17 00:00:00 2001
From: Mark Rousskov <mark.simulacrum@gmail.com>
Date: Sat, 21 Jul 2018 15:54:54 -0600
Subject: [PATCH] Compile rustc before building tests for rustdoc

---
 src/bootstrap/test.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/bootstrap/test.rs b/src/bootstrap/test.rs
index 6254f98165665..dc41e75be26af 100644
--- a/src/bootstrap/test.rs
+++ b/src/bootstrap/test.rs
@@ -1730,6 +1730,7 @@ impl Step for CrateRustdoc {
 
         let compiler = builder.compiler(builder.top_stage, self.host);
         let target = compiler.host;
+        builder.ensure(compile::Rustc { compiler, target });
 
         let mut cargo = tool::prepare_tool_cargo(builder,
                                                  compiler,