1275003 - MOZ_CRASH(Accessing the Subject Principal without an AutoJSAPI on the stack is forbidden), while editing confluence wiki

Status: RESOLVED INVALID

(Core :: DOM: Core & HTML, defect)

Description

[David Baron :dbaron: (⌚️UTC-4, no longer working on Mozilla)]

I was editing a confluence wiki at https://mana.mozilla.org/ to try to reproduce bug 1266882 under rr, and instead I hit:

Hit MOZ_CRASH(Accessing the Subject Principal without an AutoJSAPI on the stack is forbidden) at /home/dbaron/builds/ssd/mozilla-central/mozilla/dom/base/nsContentUtils.cpp:2673

I have an rr recording of this, although it's only good until I next rebuild.

(Some more info coming shortly.)

Comment 1

[David Baron :dbaron: (⌚️UTC-4, no longer working on Mozilla)]

Attachment: stack

Comment 2

[David Baron :dbaron: (⌚️UTC-4, no longer working on Mozilla)]

Is there anything else you need here other than the stack, given that I have an rr recording of this happening (which will only last until I next rebuild)?

Comment 3

[Boris Zbarsky [:bzbarsky]]

A stack is enough here, thanks!

Comment 4

[David Baron :dbaron: (⌚️UTC-4, no longer working on Mozilla)]

Er, never mind; this is due to local changes for a patch I still haven't managed to land (bug 474655).

Comment 5

[Bobby Holley (:bholley)]

What this stack means is that nsHTMLEditor::CheckPositionedElementBGandFG should not be calling nsComputedDOMStyle::GetPropertyCSSValue directly, since the latter is a webidl-exposed method. The two of them should delegate to a helper, and nsComputedDOMStyle::GetPropertyCSSValue should perform any necessary security checks.