Bump minimum Rust version to 1.65.0 (#16818)

The ecosystem e.g. regex crate, have bumped up their MSRV to 1.65.0,
which was released Nov 2022. In line with our policy, let's bump to
match.

.github/workflows/tests.yml

@@ -81,7 +81,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Install Rust
-        uses: dtolnay/rust-toolchain@1.61.0
+        uses: dtolnay/rust-toolchain@1.65.0
       - uses: Swatinem/rust-cache@v2
       - uses: matrix-org/setup-python-poetry@v1
         with:
@@ -148,7 +148,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Install Rust
-        uses: dtolnay/rust-toolchain@1.61.0
+        uses: dtolnay/rust-toolchain@1.65.0
       - uses: Swatinem/rust-cache@v2
 
       - name: Setup Poetry
@@ -208,7 +208,7 @@ jobs:
         with:
           ref: ${{ github.event.pull_request.head.sha }}
       - name: Install Rust
-        uses: dtolnay/rust-toolchain@1.61.0
+        uses: dtolnay/rust-toolchain@1.65.0
       - uses: Swatinem/rust-cache@v2
       - uses: matrix-org/setup-python-poetry@v1
         with:
@@ -225,7 +225,7 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Install Rust
-        uses: dtolnay/rust-toolchain@1.61.0
+        uses: dtolnay/rust-toolchain@1.65.0
         with:
             components: clippy
       - uses: Swatinem/rust-cache@v2
@@ -344,7 +344,7 @@ jobs:
             postgres:${{ matrix.job.postgres-version }}
 
       - name: Install Rust
-        uses: dtolnay/rust-toolchain@1.61.0
+        uses: dtolnay/rust-toolchain@1.65.0
       - uses: Swatinem/rust-cache@v2
 
       - uses: matrix-org/setup-python-poetry@v1
@@ -386,7 +386,7 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Install Rust
-        uses: dtolnay/rust-toolchain@1.61.0
+        uses: dtolnay/rust-toolchain@1.65.0
       - uses: Swatinem/rust-cache@v2
 
       # There aren't wheels for some of the older deps, so we need to install
@@ -498,7 +498,7 @@ jobs:
         run: cat sytest-blacklist .ci/worker-blacklist > synapse-blacklist-with-workers
 
       - name: Install Rust
-        uses: dtolnay/rust-toolchain@1.61.0
+        uses: dtolnay/rust-toolchain@1.65.0
       - uses: Swatinem/rust-cache@v2
 
       - name: Run SyTest
@@ -642,7 +642,7 @@ jobs:
           path: synapse
 
       - name: Install Rust
-        uses: dtolnay/rust-toolchain@1.61.0
+        uses: dtolnay/rust-toolchain@1.65.0
       - uses: Swatinem/rust-cache@v2
 
       - name: Prepare Complement's Prerequisites
@@ -674,7 +674,7 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Install Rust
-        uses: dtolnay/rust-toolchain@1.61.0
+        uses: dtolnay/rust-toolchain@1.65.0
       - uses: Swatinem/rust-cache@v2
 
       - run: cargo test

changelog.d/16818.misc

@@ -0,0 +1 @@
+Bump minimum supported Rust version to 1.61.0.

docs/upgrade.md

@@ -97,6 +97,14 @@ v1.61.0.
 
 <!-- REPLACE_WITH_SCHEMA_VERSIONS -->
 
+# Upgrading to v1.100.0
+
+## Minimum supported Rust version
+The minimum supported Rust version has been increased from v1.61.0 to v1.65.0.
+Users building from source will need to ensure their `rustc` version is up to
+date.
+
+
 # Upgrading to v1.93.0
 
 ## Minimum supported Rust version

rust/Cargo.toml

@@ -7,7 +7,7 @@ name = "synapse"
 version = "0.1.0"
 
 edition = "2021"
-rust-version = "1.61.0"
+rust-version = "1.65.0"
 
 [lib]
 name = "synapse"