message: CI: force using argfile to test againg `cargo fix`
diff: @@ -68,6 +68,13 @@ jobs:
  # Deny warnings on CI to avoid warnings getting into the codebase.
  - run: cargo test --features 'deny-warnings'
  + - name: Check operability of rustc invocation with argfile
  + env:
  + __CARGO_TEST_FORCE_ARGFILE: 1
  + run: |
  + # This only tests `cargo fix` because fix-proxy-mode is one of the most
  + # complicated subprocess management in Cargo.
  + cargo test --test testsuite --features 'deny-warnings' -- fix::
  - run: cargo test --features 'deny-warnings' --manifest-path crates/cargo-test-support/Cargo.toml
  env:
  CARGO_TARGET_DIR: target
  