From 30a592820c930cda9624211dddea9f57ab63b2ff Mon Sep 17 00:00:00 2001
From: Toru Nagashima <star.ctor@gmail.com>
Date: Wed, 18 Oct 2017 14:32:47 +0900
Subject: [PATCH] Fix: `no-useless-rest-spread` crashed (fixes #17)

---
 lib/rules/no-useless-rest-spread.js       | 3 ++-
 tests/lib/rules/no-useless-rest-spread.js | 1 +
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/rules/no-useless-rest-spread.js b/lib/rules/no-useless-rest-spread.js
index fd84cf4..f0445f7 100644
--- a/lib/rules/no-useless-rest-spread.js
+++ b/lib/rules/no-useless-rest-spread.js
@@ -115,8 +115,9 @@ module.exports = {
             const parentType = node.parent.type
             const argumentType = node.argument.type
             const isArray = argumentType.startsWith("Array")
+            const isObject = !isArray && argumentType.startsWith("Object")
             const isRedundant = (
-                argumentType === parentType ||
+                ((isArray || isObject) && argumentType === parentType) ||
                 (isArray && FUNC_TYPE.test(parentType))
             )
 
diff --git a/tests/lib/rules/no-useless-rest-spread.js b/tests/lib/rules/no-useless-rest-spread.js
index 1101fae..947edf0 100644
--- a/tests/lib/rules/no-useless-rest-spread.js
+++ b/tests/lib/rules/no-useless-rest-spread.js
@@ -35,6 +35,7 @@ ruleTester.run("no-useless-rest-spread", rule, {
         "foo(...{a}, ...{b})",
         "let list = [...{a}]",
         "let obj = {...[a]}",
+        "f(...g())",
     ],
     invalid: [
         {