640993 - TI: Assertion failure: isFunction, at ../jsinfer.h:423

Status: RESOLVED FIXED

(Core :: JavaScript Engine, defect)

Description

[Jan de Mooij [:jandem]]

--
function f() {
    return f;
}
f.__proto__ = null;
gc();
f();
new f();
--
Asserts with -n -a:
Assertion failure: isFunction, at ../jsinfer.h:423

Comment 1

[Brian Hackett [Laid off!]]

'new' overhaul in bug 619433 assumed that JSFunctions have type objects which themselves are functions, which is not the case when mutable __proto__ is in play.

http://hg.mozilla.org/projects/jaegermonkey/rev/d8900f86b86e