fix fs bug on CI and update ming-check-1 Dockerfile

Signed-off-by: onur-ozkan <work@onurozkan.dev>

Author: onur-ozkan

src/bootstrap/src/core/build_steps/compile.rs

@@ -788,6 +788,14 @@ impl Step for StdLink {
             }
         } else if compiler.stage == 0 {
             let sysroot = builder.out.join(compiler.host.triple).join("stage0-sysroot");
+
+            if builder.local_rebuild {
+                // On local rebuilds this path might be a symlink to the project root,
+                // which can be read-only (e.g., on CI). So remove it before copying
+                // the stage0 lib.
+                let _ = fs::remove_dir_all(sysroot.join("lib/rustlib/src/rust"));
+            }
+
             builder.cp_link_r(&builder.initial_sysroot.join("lib"), &sysroot.join("lib"));
         } else {
             if builder.download_rustc() {

src/ci/docker/host-x86_64/mingw-check-1/Dockerfile

@@ -47,6 +47,7 @@ COPY host-x86_64/mingw-check-1/validate-error-codes.sh /scripts/
 ENV SCRIPT \
            /scripts/check-default-config-profiles.sh && \
            python3 ../x.py build --stage 0 src/tools/build-manifest && \
+           python3 ../x.py test --stage 0 src/tools/compiletest && \
            python3 ../x.py check compiletest --set build.compiletest-use-stage0-libtest=true && \
            python3 ../x.py check --stage 1 --target=i686-pc-windows-gnu --host=i686-pc-windows-gnu && \
            python3 ../x.py check --stage 1 --set build.optimized-compiler-builtins=false core alloc std --target=aarch64-unknown-linux-gnu,i686-pc-windows-msvc,i686-unknown-linux-gnu,x86_64-apple-darwin,x86_64-pc-windows-gnu,x86_64-pc-windows-msvc && \