From c756657bd20bfe0e81173266ee0d454c3b035958 Mon Sep 17 00:00:00 2001
From: Jack Grigg <thestr4d@gmail.com>
Date: Fri, 26 Mar 2021 08:13:25 +1300
Subject: [PATCH] Set MSRV to 1.51.0

Yay const generics!
---
 .github/workflows/ci.yml | 20 ++++++++++++--------
 README.md                |  2 ++
 rust-toolchain           |  1 +
 3 files changed, 15 insertions(+), 8 deletions(-)
 create mode 100644 rust-toolchain

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b27d1406..df41eeb1 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -14,7 +14,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions-rs/toolchain@v1
         with:
-          toolchain: stable
+          toolchain: 1.51.0
           override: true
       - name: Run tests
         uses: actions-rs/cargo@v1
@@ -30,7 +30,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions-rs/toolchain@v1
         with:
-          toolchain: stable
+          toolchain: 1.51.0
           override: true
       # Build benchmarks to prevent bitrot
       - name: Build benchmarks
@@ -44,6 +44,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
+      - uses: actions-rs/toolchain@v1
+        with:
+          toolchain: 1.51.0
+          override: true
       - name: Setup mdBook
         uses: peaceiris/actions-mdbook@v1
         with:
@@ -52,20 +56,20 @@ jobs:
         run: mdbook test book/
 
   clippy:
-    name: Clippy (stable)
+    name: Clippy (1.51.0)
     timeout-minutes: 30
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
       - uses: actions-rs/toolchain@v1
         with:
-          toolchain: stable
+          toolchain: 1.51.0
           components: clippy
           override: true
       - name: Run clippy
         uses: actions-rs/clippy-check@v1
         with:
-          name: Clippy (stable)
+          name: Clippy (1.51.0)
           token: ${{ secrets.GITHUB_TOKEN }}
           args: --all-features --all-targets -- -D warnings
 
@@ -123,7 +127,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions-rs/toolchain@v1
         with:
-          toolchain: nightly
+          toolchain: 1.51.0
           override: true
       - name: cargo fetch
         uses: actions-rs/cargo@v1
@@ -136,7 +140,7 @@ jobs:
         uses: actions-rs/cargo@v1
         with:
           command: doc
-          args: --all --document-private-items
+          args: --document-private-items
 
   fmt:
     name: Rustfmt
@@ -146,7 +150,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions-rs/toolchain@v1
         with:
-          toolchain: stable
+          toolchain: 1.51.0
           override: true
       - run: rustup component add rustfmt
       - uses: actions-rs/cargo@v1
diff --git a/README.md b/README.md
index 38308111..ebec7d79 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,8 @@
 
 **IMPORTANT**: This library is being actively developed and should not be used in production software.
 
+Requires Rust 1.51+.
+
 ## Documentation
 
 - [The Orchard Book](https://zcash.github.io/orchard/)
diff --git a/rust-toolchain b/rust-toolchain
new file mode 100644
index 00000000..ba0a7191
--- /dev/null
+++ b/rust-toolchain
@@ -0,0 +1 @@
+1.51.0