From 1203d6e0c3d37465503e22734a7b1dd537a0723d Mon Sep 17 00:00:00 2001
From: CrazyMerlyn <crazy.d.merlyn@gmail.com>
Date: Tue, 16 May 2017 00:34:50 +0530
Subject: [PATCH] Exit successfully on "update not yet available"

---
 src/rustup-dist/src/dist.rs | 3 +++
 src/rustup/toolchain.rs     | 2 +-
 tests/cli-v2.rs             | 3 +--
 3 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/rustup-dist/src/dist.rs b/src/rustup-dist/src/dist.rs
index b7fde7d4ef..e74fd48a97 100644
--- a/src/rustup-dist/src/dist.rs
+++ b/src/rustup-dist/src/dist.rs
@@ -666,6 +666,9 @@ pub fn update_from_dist_<'a>(download: DownloadCfg<'a>,
             // Proceed to try v1 as a fallback
             (download.notify_handler)(Notification::DownloadingLegacyManifest);
         }
+        Err(Error(ErrorKind::ChecksumFailed { .. }, _)) => {
+            return Ok(None)
+        }
         Err(e) => return Err(e),
     }
 
diff --git a/src/rustup/toolchain.rs b/src/rustup/toolchain.rs
index a37e711d31..580c2a6963 100644
--- a/src/rustup/toolchain.rs
+++ b/src/rustup/toolchain.rs
@@ -123,7 +123,7 @@ impl<'a> Toolchain<'a> {
             (true, false) => UpdateStatus::Installed,
             (true, true) => UpdateStatus::Updated,
             (false, true) => UpdateStatus::Unchanged,
-            (false, false) => unreachable!(),
+            (false, false) => UpdateStatus::Unchanged,
         };
 
         Ok(status)
diff --git a/tests/cli-v2.rs b/tests/cli-v2.rs
index f55674a6dc..dd6da4228d 100644
--- a/tests/cli-v2.rs
+++ b/tests/cli-v2.rs
@@ -198,8 +198,7 @@ fn bad_sha_on_manifest() {
         sha_bytes[..10].clone_from_slice(b"aaaaaaaaaa");
         let sha_str = String::from_utf8(sha_bytes).unwrap();
         rustup_utils::raw::write_file(&sha_file, &sha_str).unwrap();
-        expect_err(config, &["rustup", "default", "nightly"],
-                   "checksum failed");
+        expect_ok(config, &["rustup", "default", "nightly"]);
     });
 }