187945 2018-07-24 00:54:10 -0700 Different output compared with other JS engines: can't find variable 2023-05-04 09:09:15 -0700 1 1 1 Unclassified WebKit JavaScriptCore WebKit Local Build Unspecified Unspecified RESOLVED DUPLICATE 163209 InRadar P2 Normal --- 1 sunlili webkit-unassigned email fpizlo mark.lam webkit-bug-importer ysuzuki oldest_to_newest 1444582 0 sunlili 2018-07-24 00:54:10 -0700 Hello, Running following js code: ----------------------------------- let testCases = [ function() { return { start: 0, end: 100, test: function test() { } }; }, ]; for(let testCase of testCases) { let testInfo = testCase(); function run() { print(testInfo); } run(); } print("BT_FLAG"); ----------------------------------- Output of ch, v8 and firefox: [object Object] BT_FLAG However, output of jsc is: Exception: ReferenceError: Can't find variable: testInfo BT group 2018.7.24 1455644 1 ysuzuki 2018-08-31 04:24:49 -0700 *** Bug 188784 has been marked as a duplicate of this bug. *** 1952753 2 email 2023-05-03 15:30:27 -0700 This bug makes ES6 code unusable if wrapped in a block, such as in Confluence Data Center plugins: https://community.developer.atlassian.com/t/resource-batching-breaks-closure-compiled-es6-code-in-safari/68909 "Different output" is a pretty severe understatement. "Horribly incorrect output" would be more accurate. 1952905 3 webkit-bug-importer 2023-05-04 08:41:51 -0700 <rdar://problem/108894656> 1952915 4 ysuzuki 2023-05-04 09:09:15 -0700 This is Annex B feature. *** This bug has been marked as a duplicate of bug 163209 ***