From 1a4313423d766369a118bb2e771a89df1d9da566 Mon Sep 17 00:00:00 2001
From: Wilfred Hughes <me@wilfred.me.uk>
Date: Thu, 28 Aug 2025 09:41:30 +0100
Subject: [PATCH] Increase minimum Rust version

---
 .github/workflows/test.yml | 10 +++++-----
 CHANGELOG.md               |  4 ++++
 Cargo.toml                 |  5 ++++-
 manual/src/from_source.md  |  2 +-
 rust-toolchain.toml        |  2 +-
 5 files changed, 15 insertions(+), 8 deletions(-)

diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 1f725d840..b28bfea2a 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -33,7 +33,7 @@ jobs:
       uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
 
     - name: Install Rust toolchain
-      uses: dtolnay/rust-toolchain@1.74.1
+      uses: dtolnay/rust-toolchain@1.75.0
       with:
         targets: ${{ matrix.job.target }}
 
@@ -58,7 +58,7 @@ jobs:
     steps:
       # v4.2.2
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
-      - uses: dtolnay/rust-toolchain@1.74.1
+      - uses: dtolnay/rust-toolchain@1.75.0
       # This runs tests that rely on the MIME database being present.
       - run: cargo test -- --ignored
 
@@ -77,7 +77,7 @@ jobs:
     steps:
       # v4.2.2
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
-      - uses: dtolnay/rust-toolchain@1.74.1
+      - uses: dtolnay/rust-toolchain@1.75.0
       - name: Generate output for all sample files
         run: ./sample_files/compare_all.sh
       - name: Verify output is unchanged
@@ -89,7 +89,7 @@ jobs:
     steps:
       # v4.2.2
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
-      - uses: dtolnay/rust-toolchain@1.74.1
+      - uses: dtolnay/rust-toolchain@1.75.0
       - run: cargo package --allow-dirty
 
   fmt:
@@ -98,7 +98,7 @@ jobs:
     steps:
       # v4.2.2
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
-      - uses: dtolnay/rust-toolchain@1.74.1
+      - uses: dtolnay/rust-toolchain@1.75.0
       - run: cargo fmt --all -- --check
 
   actionlint:
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 87b6801d1..fb432bc65 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 ## 0.65 (unreleased)
 
+### Build
+
+difftastic now requires Rust 1.75 to build.
+
 ### Parsing
 
 Updated Clojure, Common Lisp and Zig parsers. Improved parsing of
diff --git a/Cargo.toml b/Cargo.toml
index af25d6c9b..9e5886b8f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -12,10 +12,13 @@ edition = "2021"
 # Goal: support at least 12 months of Rust versions, and be
 # conservative about upgrades to help packagers.
 #
+# https://releases.rs/ is a useful website to see when different Rust
+# versions were released.
+#
 # For reference, Debian stable is on 1.63 (see
 # https://tracker.debian.org/pkg/rustc) but Debian doesn't currently
 # package difftastic. Other distros are somewhat newer.
-rust-version = "1.74.1"
+rust-version = "1.75.0"
 include = [
         "/build.rs",
         "/src/",
diff --git a/manual/src/from_source.md b/manual/src/from_source.md
index d2488f595..8a0c5a368 100644
--- a/manual/src/from_source.md
+++ b/manual/src/from_source.md
@@ -4,7 +4,7 @@
 
 Difftastic is written in Rust, so you will need Rust installed. I
 recommend [rustup](https://rustup.rs/) to install Rust. Difftastic
-requires Rust version 1.74.1 or later.
+requires Rust version 1.75 or later.
 
 You will also need a C++ compiler that supports C++14. If you're using
 GCC, you need at least version 8.
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
index 6df45191c..198f7078f 100644
--- a/rust-toolchain.toml
+++ b/rust-toolchain.toml
@@ -1,4 +1,4 @@
 [toolchain]
-channel = "1.74.1"
+channel = "1.75.0"
 components = ["rustfmt"]
 profile = "minimal"