try catting

.github/workflows/check-rust.yml

@@ -164,10 +164,10 @@ jobs:
         run: |
           set -o pipefail  # Ensure the pipeline fails if any command in the pipeline fails
           cargo check 2>&1 | tee build_output.log
+          cat build_output.log
           if grep -q "^warning:" build_output.log; then
             echo "Build emitted the following warnings:"
             >&2 echo `grep "^warning:" build_output.log`
-            
           else
             echo "No warnings found."
           fi