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Bug 1584465: Null check parent accessible before attribute check to cover root case. r=Jamie

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Differential Revision: https://phabricator.services.mozilla.com/D47488

--HG--
extra : moz-landing-system : lando
This commit is contained in:
Morgan Reschenberg 2019-09-30 16:23:30 +00:00
parent 47ee24af1f
commit a20612a878
1 changed files with 1 additions and 1 deletions
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2
accessible/generic/HyperTextAccessible.cpp
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@ -300,7 +300,7 @@ uint32_t HyperTextAccessible::TransformOffset(Accessible* aDescendant,
// bulleted lists here because PeekOffset returns the inner text node
// for a list when it should return the list bullet.
// We manually set the offset so the error doesn't propagate up.
if (offset == 0 && descendant->Parent()->IsHTMLListItem() &&
if (offset == 0 && parent && parent->IsHTMLListItem() &&
descendant->PrevSibling() && descendant->PrevSibling()->GetFrame() &&
descendant->PrevSibling()->GetFrame()->IsBulletFrame()) {
offset = 0;