Add -Zbuild-std test

Author: daxpedda

.github/workflows/rust.yml

@@ -60,3 +60,30 @@ jobs:
       run: cargo test --verbose
     - name: Test no-rustc mode
       run: cargo check --no-default-features
+
+  build-std:
+    strategy:
+      matrix:
+        include:
+          - os: ubuntu-latest
+            host_target: x86_64-unknown-linux-gnu
+          - os: macos-latest
+            host_target: x86_64-apple-darwin
+          - os: windows-latest
+            host_target: i686-pc-windows-msvc
+    runs-on: ${{ matrix.os }}
+    # Run tests under a directory with a space in it to double check the windows path heuristic
+    defaults:
+      run:
+        working-directory: "dir with spaces/build std"
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        path: "dir with spaces/build std"
+    - uses: dtolnay/rust-toolchain@nightly
+      with:
+        components: rust-src
+    - name: Run build-std test
+      env:
+        UI_TEST_INTEGRATION_DIR: build-std
+      run: cargo test --verbose --test integration -- --check