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Function attachment failure in a case of freezed global object #59

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Function attachment failure in a case of freezed global object #59

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4 changes: 2 additions & 2 deletions setImmediate.js
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Original file line number Diff line number Diff line change
Expand Up @@ -84,7 +84,7 @@
function canUsePostMessage() {
// The test against `importScripts` prevents this implementation from being installed inside a web worker,
// where `global.postMessage` means something completely different and can't be used for this purpose.
if (global.postMessage && !global.importScripts) {
if (global.postMessage && !global.importScripts && !(global.port && global.port.emit)) {
var postMessageIsAsynchronous = true;
var oldOnMessage = global.onmessage;
global.onmessage = function() {
Expand Down Expand Up @@ -183,4 +183,4 @@

attachTo.setImmediate = setImmediate;
attachTo.clearImmediate = clearImmediate;
}(typeof self === "undefined" ? typeof global === "undefined" ? this : global : self));
}(typeof self === "undefined" || !Object.isExtensible(self) ? typeof global === "undefined" || !Object.isExtensible(global) ? this : global : self));