René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Duplicated identifier used when mangle is enabled","articleBody":"**Bug report**\r\n\r\nTerser is using the same identifier for the function, and for the const defined inside the if. This produces code that can't be evaluated.\r\n\r\nHere is a simple reproduction case:\r\n\r\n```js\r\nfunction f1() {\r\n\tif (true) {\r\n\t\tfunction f2() {\r\n\t\t\treturn 1;\r\n\t\t}\r\n\r\n\t\tconst var1 = 666;\r\n\t}\r\n}\r\n```\r\n\r\nIf var1 is outside the \"if\", the correct identifier is used when minifying.\r\n\r\nUsed options:\r\n\r\n```js\r\n{\r\n  module: true,\r\n  compress: {\r\n    unused: false\r\n  }\r\n}\r\n```\r\n\r\n**Curent terser output**\r\n\r\n```js\r\nfunction n(){{function n(){return 1}const n=666}}\r\n```\r\n\r\nnote the inner function n() and the const n, they clash.","author":{"url":"https://github.com/renanccastro","@type":"Person","name":"renanccastro"},"datePublished":"2022-02-24T18:38:05.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":3},"url":"https://github.com/1155/terser/issues/1155"}