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Fixes mishoo/UglifyJS/issues/363 #364

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Fixes mishoo/UglifyJS/issues/363 #364

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10 changes: 10 additions & 0 deletions lib/process.js
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Original file line number Diff line number Diff line change
Expand Up @@ -279,7 +279,9 @@ function Scope(parent) {
this.uses_eval = false; // will become TRUE if eval() is detected in this or any subscopes
this.parent = parent; // parent scope
this.children = []; // sub-scopes
this.except = null; // except list
if (parent) {
this.except = parent.except;
this.level = parent.level + 1;
parent.children.push(this);
} else {
Expand Down Expand Up @@ -334,6 +336,9 @@ Scope.prototype = {
//
// 3. doesn't shadow a name that is referenced but not
// defined (possibly global defined elsewhere).
//
// 4. is not in the reserved names list
//
for (;;) {
var m = base54(++this.cname), prior;

Expand All @@ -351,6 +356,10 @@ Scope.prototype = {
if (HOP(this.refs, m) && this.refs[m] == null)
continue;

// case 4
if (this.except && member(m, this.except))
continue;

// I got "do" once. :-/
if (!is_identifier(m))
continue;
Expand Down Expand Up @@ -545,6 +554,7 @@ function ast_mangle(ast, options) {
function with_scope(s, cont, extra) {
var _scope = scope;
scope = s;
scope.except = options.except;
if (extra) for (var i in extra) if (HOP(extra, i)) {
s.set_mangle(i, extra[i]);
}
Expand Down