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avoid arguments and eval in reduce_vars (#1924)

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fixes #1922
This commit is contained in:
Alex Lam S.L
2017-05-12 12:34:55 +08:00
committed by GitHub
parent 547f41beba
commit ac73c5d421
2 changed files with 63 additions and 10 deletions
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16
lib/compress.js
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@@ -354,10 +354,14 @@ merge(Compressor.prototype, {
// So existing transformation rules can work on them.
node.argnames.forEach(function(arg, i) {
var d = arg.definition();
d.fixed = function() {
return iife.args[i] || make_node(AST_Undefined, iife);
};
mark(d, true);
if (!node.uses_arguments && d.fixed === undefined) {
d.fixed = function() {
return iife.args[i] || make_node(AST_Undefined, iife);
};
mark(d, true);
} else {
d.fixed = false;
}
});
}
descend();
@@ -491,7 +495,9 @@ merge(Compressor.prototype, {
function reset_def(def) {
def.escaped = false;
if (!def.global || def.orig[0] instanceof AST_SymbolConst || compressor.toplevel(def)) {
if (def.scope.uses_eval) {
def.fixed = false;
} else if (!def.global || def.orig[0] instanceof AST_SymbolConst || compressor.toplevel(def)) {
def.fixed = undefined;
} else {
def.fixed = false;