From 0bda862ccaddf6b5780db3cfa163f320c530d3b7 Mon Sep 17 00:00:00 2001
From: Mohamed Hegazy <mhegazy@microsoft.com>
Date: Mon, 14 May 2018 22:49:50 -0700
Subject: [PATCH] Remove assert

---
 src/compiler/checker.ts                       |  2 +-
 .../codeFixInferFromUsageJSXElement.ts        | 40 +++++++++++++++++++
 2 files changed, 41 insertions(+), 1 deletion(-)
 create mode 100644 tests/cases/fourslash/codeFixInferFromUsageJSXElement.ts

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index b85acc03d46..f308348fb46 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -3604,7 +3604,7 @@ namespace ts {
 
             function symbolToParameterDeclaration(parameterSymbol: Symbol, context: NodeBuilderContext, preserveModifierFlags?: boolean): ParameterDeclaration {
                 const parameterDeclaration = getDeclarationOfKind<ParameterDeclaration>(parameterSymbol, SyntaxKind.Parameter);
-                Debug.assert(!!parameterDeclaration || isTransientSymbol(parameterSymbol) && !!parameterSymbol.isRestParameter);
+                Debug.assert(!!parameterDeclaration || isTransientSymbol(parameterSymbol));
 
                 let parameterType = getTypeOfSymbol(parameterSymbol);
                 if (parameterDeclaration && isRequiredInitializedParameter(parameterDeclaration)) {
diff --git a/tests/cases/fourslash/codeFixInferFromUsageJSXElement.ts b/tests/cases/fourslash/codeFixInferFromUsageJSXElement.ts
new file mode 100644
index 00000000000..c7ce7cc6bdd
--- /dev/null
+++ b/tests/cases/fourslash/codeFixInferFromUsageJSXElement.ts
@@ -0,0 +1,40 @@
+/// <reference path='fourslash.ts' />
+
+// @noImplicitAny: true
+// @jsx: react
+// @module: es2015
+// @moduleResolution: node
+
+// @Filename: /node_modules/@types/react/index.d.ts
+////export = React;
+////export as namespace React;
+////declare namespace React {
+////    export class Component { render(): JSX.Element | null; }
+////}
+////declare global {
+////    namespace JSX {
+////        interface Element {}
+////    }
+////}
+
+
+// @filename: a.tsx
+//// import React from 'react';
+////
+//// export default function Component([|props |]) {
+////     if (props.isLoading) {
+////         return <div>...Loading < /div>;
+////     }
+////     else {
+////         return <AnotherComponent
+////             update={
+////             (rec) => {
+////                 return props.update(rec);
+////             }
+////         }
+////         />;
+////     }
+//// }
+
+
+verify.rangeAfterCodeFix("props: { isLoading: any; update: (...arg0: any) => void; }",/*includeWhiteSpace*/ undefined, /*errorCode*/ undefined, 0);
\ No newline at end of file