Index: clang-tools-extra/clang-tidy/bugprone/ArgumentCommentCheck.cpp
===================================================================
--- clang-tools-extra/clang-tidy/bugprone/ArgumentCommentCheck.cpp
+++ clang-tools-extra/clang-tidy/bugprone/ArgumentCommentCheck.cpp
@@ -24,6 +24,8 @@
   if (const auto *D = Node.getDeclContext()->getEnclosingNamespaceContext())
     if (D->isStdNamespace())
       return true;
+  if (Node.getLocation().isInvalid())
+    return false;
   return Node.getASTContext().getSourceManager().isInSystemHeader(
       Node.getLocation());
 }
Index: clang-tools-extra/test/clang-tidy/checkers/bugprone-argument-comment.cpp
===================================================================
--- clang-tools-extra/test/clang-tidy/checkers/bugprone-argument-comment.cpp
+++ clang-tools-extra/test/clang-tidy/checkers/bugprone-argument-comment.cpp
@@ -151,3 +151,8 @@
   my_system_header_function(/*not_arg=*/1);
 }
 } // namespace system_header
+
+void testInvalidSlocCxxConstructExpr() {
+  __builtin_va_list __args;
+  // __builtin_va_list has no defination in any source file
+}