663910 - TI: Assertion failure: obj, at ../jsval.h:720

Status: RESOLVED FIXED

(Core :: JavaScript Engine, defect)

Description

[Christian Holler (:decoder)]

The following testcase asserts on TI revision f59a6cabfbd4 (run with -j -m -n -a), tested on 64 bit:


var otherGlobalSameCompartment = newGlobal("same-compartment");
eval = otherGlobalSameCompartment.eval;
doesNotNeedParens(1, "if (xx) { }");
needParens(2, "if (1, xx) { }");
function doesNotNeedParens(section, pat) {
    try {
        f = new Function
    } catch (e) {}
    roundTripTest(section, f)
}
function needParens(section, pat, exp) {
    var f, ft;
    roundTripTest(section, f, exp)
}
function roundTripTest(section, f, exp) {
    uf = "" + f
    var euf;
    try {
        euf = eval("(" + uf + ")")
    } catch (e) {} + euf
}

Comment 1

[Brian Hackett [Laid off!]]

There was a path in the Eval stub (direct eval not actually calling the original eval function) where the result was not being monitored.

http://hg.mozilla.org/projects/jaegermonkey/rev/7eec66369bfa

Comment 2

[Christian Holler (:decoder)]

A testcase for this bug was automatically identified at js/src/jit-test/tests/jaeger/bug663910.js.