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diff --git a/js/src/tests/non262/async-functions/await-in-parameters-of-async-func.js b/js/src/tests/non262/async-functions/await-in-parameters-of-async-func.js
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+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ * Contributor:
+ */
+
+//-----------------------------------------------------------------------------
+var BUGNUMBER = 1478910;
+var summary = 'JSMSG_AWAIT_IN_PARAMETER error for incomplete await expr in async function/generator parameter';
+
+
+//-----------------------------------------------------------------------------
+test();
+//-----------------------------------------------------------------------------
+
+function test()
+{
+ printBugNumber(BUGNUMBER);
+ printStatus(summary);
+
+ let testAwaitInDefaultExprOfAsyncFunc = (code) => {
+ assertThrowsInstanceOf(() => eval(code), SyntaxError, "await expression can't be used in parameter");
+ };
+
+ let testNoException = (code) => {
+ assertEq(completesNormally(code), true);
+ };
+
+ // https://www.ecma-international.org/ecma-262/9.0/
+
+ // Async Generator Function Definitions : AsyncGeneratorDeclaration & AsyncGeneratorExpression
+ // async function* f() {}
+ // f = async function*() {}
+ testAwaitInDefaultExprOfAsyncFunc("async function* f(a = await) {}");
+ testAwaitInDefaultExprOfAsyncFunc("let f = async function*(a = await) {}");
+
+ testAwaitInDefaultExprOfAsyncFunc("function f(a = async function*(a = await) {}) {}");
+ testAwaitInDefaultExprOfAsyncFunc("function f() { a = async function*(a = await) {}; }");
+
+ testAwaitInDefaultExprOfAsyncFunc("async function* f() { a = async function*(a = await) {}; }");
+ testNoException("async function* f() { let a = function(a = await) {}; }");
+
+ testNoException("async function* f(a = async function*() { await 1; }) {}");
+
+ // Async Function Definitions : AsyncFunctionDeclaration & AsyncFunctionExpression
+ // async function f() {}
+ // f = async function() {}
+ testAwaitInDefaultExprOfAsyncFunc("async function f(a = await) {}");
+ testAwaitInDefaultExprOfAsyncFunc("let f = async function(a = await) {}");
+
+ testAwaitInDefaultExprOfAsyncFunc("function f(a = async function(a = await) {}) {}");
+ testAwaitInDefaultExprOfAsyncFunc("function f() { a = async function(a = await) {}; }");
+
+ testAwaitInDefaultExprOfAsyncFunc("async function f() { a = async function(a = await) {}; }");
+ testNoException("async function f() { let a = function(a = await) {}; }");
+
+ testNoException("async function f(a = async function() { await 1; }) {}");
+
+ // Async Arrow Function Definitions : AsyncArrowFunction
+ // async () => {}
+ testAwaitInDefaultExprOfAsyncFunc("async (a = await) => {}");
+
+ testNoException("async (a = async () => { await 1; }) => {}");
+
+ reportCompare(true, true, summary);
+}