[clang-tidy] Fix bugprone-unchecked-optional-access in UseRangesCheck

Author: zeyi2

clang-tools-extra/clang-tidy/utils/UseRangesCheck.cpp

@@ -247,6 +247,8 @@ void UseRangesCheck::check(const MatchFinder::MatchResult &Result) {
                 Result.Context->getLangOpts()));
       } else {
         assert(ReverseDescriptor && "Couldn't find forward argument");
+        if (!ReverseDescriptor)
+          return;
         ArgNode.push_back('R');
         ArgExpr = Result.Nodes.getNodeAs<Expr>(ArgNode);
         assert(ArgExpr && "Couldn't find forward or reverse argument");