From db87dcf13e69cecd0f6153f65ab9aab81cffd574 Mon Sep 17 00:00:00 2001 From: "Alex Lam S.L" Date: Wed, 18 Nov 2020 23:58:33 +0000 Subject: [PATCH] enhance `varify` (#4303) --- lib/compress.js | 4 +++- test/compress/varify.js | 19 +++++++++++++++++++ 2 files changed, 22 insertions(+), 1 deletion(-) diff --git a/lib/compress.js b/lib/compress.js index f0453d6a..acd15f5e 100644 --- a/lib/compress.js +++ b/lib/compress.js @@ -7124,7 +7124,9 @@ merge(Compressor.prototype, { var def = name.definition(); def.orig[def.orig.indexOf(node)] = name; var scope = def.scope.resolve(); - if (def.scope !== scope) scope.variables.set(def.name, def); + if (def.scope === scope) return; + def.scope = scope; + scope.variables.set(def.name, def); }), value: defn.value }); diff --git a/test/compress/varify.js b/test/compress/varify.js index 95acd032..4d2a6b5a 100644 --- a/test/compress/varify.js +++ b/test/compress/varify.js @@ -390,3 +390,22 @@ issue_4290_1_let: { expect_stdout: true node_version: ">=4" } + +drop_forin_let: { + options = { + loops: true, + toplevel: true, + unused: true, + varify: true, + } + input: { + "use strict"; + for (let a in console.log("PASS")); + } + expect: { + "use strict"; + console.log("PASS"); + } + expect_stdout: "PASS" + node_version: ">=4" +} -- 2.34.1