ci: capture backtrace for REST Arrow test failure

Author: abnobdoss

.github/workflows/aws_test.yml

@@ -130,6 +130,17 @@ jobs:
         env:
           CMAKE_TOOLCHAIN_FILE: ${{ startsWith(matrix.runs-on, 'ubuntu') && matrix.bundle_awssdk == 'OFF' && '/usr/local/share/vcpkg/scripts/buildsystems/vcpkg.cmake' || '' }}
         run: ci/scripts/build_iceberg.sh "$(pwd)" OFF ON ${{ matrix.s3 }} ${{ matrix.sigv4 }} ${{ matrix.bundle_awssdk }}
+      - name: Diagnose REST Arrow test failure
+        if: ${{ failure() && startsWith(matrix.runs-on, 'ubuntu') && matrix.bundle_awssdk == 'OFF' }}
+        shell: bash
+        run: |
+          test -x build/src/iceberg/test/rest_arrow_file_io_test || exit 0
+          sudo apt-get install -y gdb
+          cd build
+          timeout 120s gdb --batch \
+            -ex 'set pagination off' -ex run -ex 'thread apply all bt' \
+            -ex 'info sharedlibrary' \
+            --args src/iceberg/test/rest_arrow_file_io_test
       - name: Save sccache
         if: always()
         uses: ./.github/actions/save-sccache