pin rustc

Author: tgross35

.github/actions/build-with-patched-std/action.yml

@@ -31,6 +31,7 @@ runs:
         # symlink on Linux and a junction on Windows, so it will exist on both
         # platforms.
         RUSTC_BUILD_DIR: build/host
+        RUST_BACKTRACE: 1
       working-directory: ${{ inputs.rustc-dir }}
       run: |
         set -x

.github/workflows/check-binary-size.yml

@@ -56,12 +56,15 @@ jobs:
         with:
           repository: rust-lang/rust
           path: ${{ env.RUSTC_DIR }}
+          # Arbitrary known working version, latest commit on 2024-02-13
+          ref: cc74ed08d53fbb440b4ab70035a92d89d418d23c
       - name: Set up std repository and backtrace submodule for size test
         shell: bash
         working-directory: ${{ env.RUSTC_DIR }}
         env:
           PR_SOURCE_REPO: ${{ github.event.pull_request.head.repo.full_name }}
         run: |
+          set -x
           # Bootstrap config
           cat <<EOF > bootstrap.toml
           change-id = 9999999
@@ -78,7 +81,6 @@ jobs:
           }
           EOF
 
-          set -x
           git submodule update --init library/backtrace
 
           cd library/backtrace