183169 2018-02-27 12:16:44 -0800 ReferenceError on constants within {}-block, unless in strict mode 2018-03-01 21:52:42 -0800 1 1 1 Unclassified WebKit JavaScriptCore Safari Technology Preview All macOS 10.13 RESOLVED DUPLICATE 163209 P2 Normal --- 1 maarten webkit-unassigned maarten ysuzuki oldest_to_newest 1402383 0 maarten 2018-02-27 12:16:44 -0800 The following code/syntax throws a ReferenceError it should be valid es6 where MY_CONST is scoped to the {}-block { const MY_CONST = 60000; function doIt() { console.log(MY_CONST); }; doIt(); } in strict mode it works: "use strict"; { const MY_CONST = 60000; function doIt() { console.log(MY_CONST); }; doIt(); } 1403136 1 ysuzuki 2018-03-01 21:52:42 -0800 *** This bug has been marked as a duplicate of bug 163209 ***