ci: Better tidy errors

Author: MarcoFalke

ci/test/03_test_script.sh

@@ -182,7 +182,11 @@ if [ "${RUN_TIDY}" = "true" ]; then
 
   set -eo pipefail
   cd "${BASE_BUILD_DIR}/bitcoin-$HOST/src/"
-  ( run-clang-tidy-"${TIDY_LLVM_V}" -quiet -load="/tidy-build/libbitcoin-tidy.so" "${MAKEJOBS}" ) | grep -C5 "error"
+  if ! ( run-clang-tidy-"${TIDY_LLVM_V}" -quiet -load="/tidy-build/libbitcoin-tidy.so" "${MAKEJOBS}" | tee tmp.tidy-out.txt ); then
+    grep -C5 "error: " tmp.tidy-out.txt
+    echo "^^^ ⚠️ Failure generated from clang-tidy"
+    false
+  fi
   # Filter out files by regex here, because regex may not be
   # accepted in src/.bear-tidy-config
   # Filter out: