check default config profiles on CI

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

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

@@ -46,6 +46,8 @@ ENV RUN_CHECK_WITH_PARALLEL_QUERIES 1
 # We disable optimized compiler built-ins because that requires a C toolchain for the target.
 # We also skip the x86_64-unknown-linux-gnu target as it is well-tested by other jobs.
 ENV SCRIPT python3 ../x.py check --stage 0 --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 && \
+           # Ensure that default config profiles are not broken
+           for config_file in ../src/bootstrap/defaults/*.toml; do python3 ../x.py build --dry-run --config "$config_file"; done
            python3 ../x.py check --target=i686-pc-windows-gnu --host=i686-pc-windows-gnu && \
            python3 ../x.py clippy bootstrap -Dwarnings && \
            python3 ../x.py clippy compiler library -Aclippy::all -Dclippy::correctness && \