Update

node_modules/eslint/lib/rules/no-dupe-args.js

@@ -5,6 +5,12 @@
 
 "use strict";
 
+//------------------------------------------------------------------------------
+// Requirements
+//------------------------------------------------------------------------------
+
+const astUtils = require("./utils/ast-utils");
+
 //------------------------------------------------------------------------------
 // Rule Definition
 //------------------------------------------------------------------------------
@@ -58,10 +64,15 @@ module.exports = {
 
 				// Checks and reports duplications.
 				const defs = variable.defs.filter(isParameter);
+				const loc = {
+					start: astUtils.getOpeningParenOfParams(node, sourceCode)
+						.loc.start,
+					end: sourceCode.getTokenBefore(node.body).loc.end,
+				};
 
 				if (defs.length >= 2) {
 					context.report({
-						node,
+						loc,
 						messageId: "unexpected",
 						data: { name: variable.name },
 					});