658294 - TI: Assertion failure: v.isNumber() || v.isBoolean(), at jsobj.cpp:6578

Status: RESOLVED FIXED

(Core :: JavaScript Engine, defect)

Description

[Christian Holler (:decoder)]

The following testcase asserts on TI revision 4dff743ec04d (run with -j -m -n -a), tested on 64 bit:

test();
function test()
{
  try {
    instances = []
    for (var i = 0; i != 2; ++i) 
    instances[i]=constructor
    var i = 0;
    var instance = instances[i];
    var name = instance.name;
    for (var j = 1; j != instances; ++j) 
    if (i != j && instance instanceof name[j].constructor) {}
  } catch(ex) {}
}
test();

Comment 2

[Brian Hackett [Laid off!]]

On some paths through stubs::GetElem and ic::GetElement/CallElement, we did not call typeMonitor before returning to update type information for the result of the access (grumble... x2).

http://hg.mozilla.org/projects/jaegermonkey/rev/3a894ab530ae

Comment 3

[Christian Holler (:decoder)]

A testcase for this bug was automatically identified at js/src/jit-test/tests/jaeger/bug658294.js.