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1 load(libdir + "asserts.js"); | |
2 | |
3 // Throw a TypeError if the trap reports an extensible object as non-extensible | |
4 assertThrowsInstanceOf(function () { | |
5 Object.preventExtensions(new Proxy({}, { | |
6 preventExtensions: function () { | |
7 return true; | |
8 } | |
9 })); | |
10 }, TypeError); |