fix MSRV

.github/workflows/ci.yml

@@ -13,6 +13,7 @@ env:
   RUST_LOG: info
   RUST_BACKTRACE: full
   MSRV: 1.65
+  DENO_MSRV: 1.70
   PKG_CONFIG_ALLOW_CROSS: 1 # allow android to work
   RUSTFLAGS: --cfg=web_sys_unstable_apis -D warnings
   RUSTDOCFLAGS: -Dwarnings
@@ -351,8 +352,8 @@ jobs:
 
       - name: Install MSRV toolchain
         run: |
-          rustup toolchain install ${{ env.MSRV }} --no-self-update --profile=minimal --component clippy
-          rustup default ${{ env.MSRV }}
+          rustup toolchain install ${{ env.DENO_MSRV }} --no-self-update --profile=minimal --component clippy
+          rustup default ${{ env.DENO_MSRV }}
 
       - name: disable debug
         shell: bash

.github/workflows/cts.yml

@@ -11,7 +11,7 @@ env:
   CARGO_INCREMENTAL: false
   CARGO_TERM_COLOR: always
   RUST_BACKTRACE: full
-  MSRV: 1.65
+  DENO_MSRV: 1.70
 
 jobs:
   cts:
@@ -51,8 +51,8 @@ jobs:
 
       - name: Install MSRV toolchain
         run: |
-          rustup toolchain install ${{ env.MSRV }} --no-self-update --profile=minimal --target ${{ matrix.target }}
-          rustup default ${{ env.MSRV }}
+          rustup toolchain install ${{ env.DENO_MSRV }} --no-self-update --profile=minimal --target ${{ matrix.target }}
+          rustup default ${{ env.DENO_MSRV }}
 
       - name: caching
         uses: Swatinem/rust-cache@v2

README.md

@@ -33,7 +33,7 @@ For an overview of all the components in the gfx-rs ecosystem, see [the big pict
 ### MSRV policy
 
 Minimum Supported Rust Version is **1.65**.
-It is enforced on CI (in "/.github/workflows/ci.yml") with `RUST_VERSION` variable.
+It is enforced on CI (in "/.github/workflows/ci.yml") with `MSRV` variable.
 This version can only be upgraded in breaking releases.
 
 The `wgpu-core`, `wgpu-hal`, and `wgpu-types` crates should never
@@ -43,6 +43,10 @@ determined by the value of `MINIMUM_RUST_VERSION` in
 vendor` to extract only those crates it actually uses, so the
 workspace's other crates can have more recent MSRVs.
 
+The `rust-toolchain` file's value is the `MSRV` required for `deno_webgpu`
+and `cts_runner`, and not the Firefox MSRV, as these require newer MSRVs than 
+the rest of the codebase due to their dependencies on Deno.
+
 _Note for Rust 1.64_: The workspace itself can even use a newer MSRV
 than Firefox, as long as the vendoring step's `Cargo.toml` rewriting
 removes any features Firefox's MSRV couldn't handle. For example,

rust-toolchain

@@ -5,6 +5,6 @@
 # to the user in the error, instead of "error: invalid channel name '[toolchain]'".
 
 [toolchain]
-channel = "1.70"
+channel = "1.70" # Needed for deno & cts_runner. Firefox's MSRV is 1.65
 components = ["rustfmt", "clippy"]
 targets = ["wasm32-unknown-unknown"]