658539 - TI: Crash [@ js::types::TypeFailure] involving missing type at #2:00019 pushed 0: ArrayBuffer:prototype:new or Number:prototype:new

Status: RESOLVED FIXED

(Core :: JavaScript Engine, defect)

Description

[Gary Kwong [:gkw] [:nth10sd] (NOT official MoCo now)]

with(newGlobal('same-compartment'))
new ArrayBuffer()

crashes js debug shell on JM changeset aec367836312 with -m, -a and -n at js::types::TypeFailure with the message:

[infer failure] Missing type at #2:00019 pushed 0: ArrayBuffer:prototype:new

with(newGlobal('same-compartment'))
new Number()

crashes js debug shell on JM changeset aec367836312 with -m, -a and -n at js::types::TypeFailure with the message:

[infer failure] Missing type at #2:00019 pushed 0: Number:prototype:new

Comment 1

[Brian Hackett [Laid off!]]

Type handlers for natives which construct objects sometimes based their result on the native's global and sometimes on the calling script's global.  TM's behavior here is normally wrong anyways (bug 631135), but TI needs to be consistent with TM and the simple way to do that is to mark the results of these cross-global native calls as unknown.

http://hg.mozilla.org/projects/jaegermonkey/rev/33f1ad45ccb8

Comment 2

[Christian Holler (:decoder)]

A testcase for this bug was automatically identified at js/src/jit-test/tests/basic/bug658539.js.