Prevent endless recursion when evaluating self-referencing consts

Fix #1041
2016-04-12 20:30:44 +02:00
parent 187a0caf9d
commit 4b4528ee05
2 changed files with 49 additions and 2 deletions
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -1030,8 +1030,16 @@ merge(Compressor.prototype, {
                : ev(this.alternative, compressor);
        });
        def(AST_SymbolRef, function(compressor){
-            var d = this.definition();
-            if (d && d.constant && d.init) return ev(d.init, compressor);
+            if (this._evaluating) throw def;
+            this._evaluating = true;
+            try {
+                var d = this.definition();
+                if (d && d.constant && d.init) {
+                    return ev(d.init, compressor);
+                }
+            } finally {
+                this._evaluating = false;
+            }
            throw def;
        });
        def(AST_Dot, function(compressor){