fix clang tidy check does not fail for failures

Author: BewareMyPower

build-support/run_clang_tidy.sh

@@ -33,9 +33,11 @@ done
 SCRIPT=$(which run-clang-tidy)
 set +e
 nproc
-if [[ $? == 0 ]]; then
-    python3 $SCRIPT -p build -j$(nproc) $(cat files.txt)
+if [[ $? == 0]]; then
+    NUM_THREADS=$(nproc)
 else
-    python3 $SCRIPT -p build -j8 $(cat files.txt)
+    NUM_THREADS=8
 fi
+set -e
+python3 $SCRIPT -p build -j$(nproc) $(cat files.txt)
 rm -f files.txt