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fix corner case in reduce_vars (#3141)

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fixes #3140
This commit is contained in:
Alex Lam S.L
2018-05-21 15:53:51 +08:00
committed by GitHub
parent c14d09ba84
commit b5af8a1914
2 changed files with 201 additions and 1 deletions
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13
lib/compress.js
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@@ -380,6 +380,16 @@ merge(Compressor.prototype, {
mark(tw, def, true);
}
});
scope.may_call_this = function() {
scope.may_call_this = noop;
if (!scope.contains_this()) return;
scope.functions.each(function(def) {
if (def.init instanceof AST_Defun && !(def.id in tw.defun_ids)) {
tw.defun_ids[def.id] = false;
}
});
return true;
};
}
function mark_defun(tw, def) {
@@ -556,6 +566,7 @@ merge(Compressor.prototype, {
return true;
});
def(AST_Call, function(tw, descend) {
if (tw.find_parent(AST_Scope).may_call_this()) return;
var exp = this.expression;
if (!(exp instanceof AST_SymbolRef)) return;
var def = exp.definition();
@@ -6278,7 +6289,7 @@ merge(Compressor.prototype, {
return self;
});
AST_Lambda.DEFMETHOD("contains_this", function() {
AST_Scope.DEFMETHOD("contains_this", function() {
var result;
var self = this;
self.walk(new TreeWalker(function(node) {