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  1. {"ast":null,"code":"var ITERATOR = require('./_wks')('iterator');\n\nvar SAFE_CLOSING = false;\n\ntry {\n var riter = [7][ITERATOR]();\n\n riter['return'] = function () {\n SAFE_CLOSING = true;\n }; // eslint-disable-next-line no-throw-literal\n\n\n Array.from(riter, function () {\n throw 2;\n });\n} catch (e) {\n /* empty */\n}\n\nmodule.exports = function (exec, skipClosing) {\n if (!skipClosing && !SAFE_CLOSING) return false;\n var safe = false;\n\n try {\n var arr = [7];\n var iter = arr[ITERATOR]();\n\n iter.next = function () {\n return {\n done: safe = true\n };\n };\n\n arr[ITERATOR] = function () {\n return iter;\n };\n\n exec(arr);\n } catch (e) {\n /* empty */\n }\n\n return safe;\n};","map":null,"metadata":{},"sourceType":"script"}