From: Marc-Antoine Perennou <Marc-Antoine@Perennou.com>
Date: Wed, 7 Jun 2017 15:53:23 +0000 (+0200)
Subject: Include rustc version in metadata
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Include rustc version in metadata

Signed-off-by: Marc-Antoine Perennou <Marc-Antoine@Perennou.com>
---

diff --git a/src/cargo/ops/cargo_rustc/context.rs b/src/cargo/ops/cargo_rustc/context.rs
index 1b1242f90..f569c1bef 100644
--- a/src/cargo/ops/cargo_rustc/context.rs
+++ b/src/cargo/ops/cargo_rustc/context.rs
@@ -482,6 +482,10 @@ impl<'a, 'cfg> Context<'a, 'cfg> {
         unit.target.name().hash(&mut hasher);
         unit.target.kind().hash(&mut hasher);
 
+        if let Ok(ref rustc) = self.config.rustc() {
+            rustc.verbose_version.hash(&mut hasher);
+        }
+
         Some(Metadata(hasher.finish()))
     }