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fix hoist_funs on block-scoped function under "use strict" (#2013)

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Technically not part of ES5, but commonly used code exists in the wild.
This commit is contained in:
Alex Lam S.L
2017-05-27 17:44:59 +08:00
committed by GitHub
parent 95094b9c22
commit 7b13159cda
2 changed files with 81 additions and 2 deletions
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5
lib/compress.js
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@@ -2251,11 +2251,12 @@ merge(Compressor.prototype, {
dirs.push(node);
return make_node(AST_EmptyStatement, node);
}
if (node instanceof AST_Defun && hoist_funs) {
if (hoist_funs && node instanceof AST_Defun
&& (tt.parent() === self || !compressor.has_directive("use strict"))) {
hoisted.push(node);
return make_node(AST_EmptyStatement, node);
}
if (node instanceof AST_Var && hoist_vars) {
if (hoist_vars && node instanceof AST_Var) {
node.definitions.forEach(function(def){
vars.set(def.name.name, def);
++vars_found;