Status: New
Owner: ----
New issue 3718 by [email protected]: CallSite.getTypeName() throws
TypeError in strict mode
https://code.google.com/p/v8/issues/detail?id=3718
In strict mode, calling CallSite.getTypeName() on a call site that doesn't
have a receiver throws a TypeError as shown below. CallSiteGetTypeName
should check that the receiver is non-null/undefined before accessing
the 'constructor' property.
$ d8 --use_strict
V8 version 3.26.31.6 [console: dumb]
d8> // Use prepareStackTrace to obtain an array of CallSite objects.
d8> Error.prepareStackTrace = function(e, stackTrace) { return stackTrace;
};
function (e, stackTrace) { return stackTrace; }
d8>
d8> // Construct the Error inside a function called without a receiver.
d8> function f() { return new Error().stack; }
d8> var stack = f();
d8>
d8> // Restore default stack-trace formatting so we can see the TypeError.
d8> delete Error.prepareStackTrace;
true
d8>
d8> stack[0].getTypeName()
(d8):1: TypeError: Cannot read property 'constructor' of undefined
stack[0].getTypeName()
^
TypeError: Cannot read property 'constructor' of undefined
at CallSiteGetTypeName (native)
at (d8):1:10
Without --use_strict, the type name is the string "[object global]".
Shouldn't it just be the string "global" because that's the value of the
global object's [[Class]]?
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