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fix corner case in evaluate & reduce_vars (#4423)

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fixes #4422
This commit is contained in:
Alex Lam S.L
2020-12-19 21:47:15 +00:00
committed by GitHub
parent 87cf715213
commit 8ce3c7d70f
2 changed files with 31 additions and 1 deletions
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9
lib/compress.js
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@@ -595,7 +595,14 @@ merge(Compressor.prototype, {
var expr = node.expression;
if (!(expr instanceof AST_SymbolRef)) return;
var def = expr.definition();
if (is_arguments(def) && node.property instanceof AST_Number) def.reassigned = true;
if (!is_arguments(def)) return;
var key = node.property;
if (key.is_constant()) key = key.value;
if (!(key instanceof AST_Node) && !/^[1-9]*[0-9]$/.test(key)) return;
def.reassigned = true;
(key instanceof AST_Node ? def.scope.argnames : [ def.scope.argnames[key] ]).forEach(function(argname) {
if (argname instanceof AST_SymbolFunarg) argname.definition().fixed = false;
});
}
function scan_declaration(tw, lhs, fixed, visit) {