TEST-UNEXPECTED-FAIL | addon-sdk/tests/test-simple-prefs.testIterations | TypeError: Object.prototype.hasOwnProperty is not a function An exception occurred. Traceback (most recent call last): File "resource://gre/modules/Promise-backend.js", line 691, in this.PromiseWalker.scheduleWalkerLoop/< DOMPromise.resolve().then(() => this.walkerLoop()); File "resource://gre/modules/Promise-backend.js", line 749, in this.PromiseWalker.walkerLoop this.handlers.shift().process(); File "resource://gre/modules/Promise-backend.js", line 870, in Handler.prototype.process nextValue = this.onResolve.call(undefined, nextValue); File "resource://extensions.modules.336806d1-1ef9-4d56-a66a-b21bf78f5927-at-jetpack.commonjs.path/sdk/deprecated/unit-test.js", line 505, in startMany/runNextTest/< self.start({test: test, onDone: runNextTest}); File "resource://extensions.modules.336806d1-1ef9-4d56-a66a-b21bf78f5927-at-jetpack.commonjs.path/sdk/deprecated/unit-test.js", line 542, in start this.test.testFunction(this); File "resource://extensions.modules.336806d1-1ef9-4d56-a66a-b21bf78f5927-at-jetpack.commonjs.path/sdk/test.js", line 76, in test(assert); File "resource://336806d1-1ef9-4d56-a66a-b21bf78f5927-at-jetpack/addon-sdk/tests/test-simple-prefs.js", line 41, in exports.testIterations assert.ok(Object.prototype.hasOwnProperty.call(sp, "test")); TypeError: Object.prototype.hasOwnProperty is not a function

Something landed between dec 8th and the 10th on fx-team which caused this.

Irakli said he is working on this one.