Add backtrace to find where is the issue

.github/workflows/build.yml

@@ -92,5 +92,6 @@ jobs:
           RECIPE_PATH: ${{ steps.build_vars.outputs.recipe_path }}
           RUST_LOG_STYLE: always
           CLICOLOR_FORCE: "1"
+          RUST_BACKTRACE: "1"
         run: |
           sudo -E bluebuild build -v --push ${RECIPE_PATH}