370812 - Frame construction never triggered if root content removed from document before initial reflow

Status: NEW

(Core :: Layout, defect)

Description

[Eli Friedman]

Attachment: Testcase

See testcase.  The content never appears and the presshell keep on asserting about not being able to find an event frame.

Comment 1

[Eli Friedman]

Comment on attachment 255575 [details]
Testcase

Oops, I messed up the testcase.  I'll post a new version sometime soon.

Comment 2

[Eli Friedman]

Attachment: Real testcase

I messed up a bit when I was testing it out. Didn't realize my debugging alert was the cause of the bug :).  (Incremental reflow bugs are wonderful...)

document.width is way to trigger a reflow without bugging the user or having a body element.

I think the initial reflow is bailing out because there isn't any content, so the frame constructor never get initialized.

Comment 3

[Eli Friedman]

In case it's useful, this is HTML only. (The equivalent XHTML testcase works just fine, although it does assert.)

Comment 4

[Boris Zbarsky [:bzbarsky]]

See also discussion in bug 312858?

Comment 5

[Eli Friedman]

I don't think it's related; I'm pretty sure the issue here is that the frames can't be constructed under a null root rather than an issue with the correct content norifications.  See PresShell::InitialReflow and nsCSSFrameConstructor::ContentInserted; if there isn't any root content, InitialReflow basically does nothing, and if there isn't a frame to put the root content into, ContentInserted does nothing, leading to no frames ever getting created.

Comment 6

[Christian :Biesinger (don't email me, ping me on IRC)]

is this related to bug 300540?

Comment 7

[Eli Friedman]

Definitely related; I'd almost call it a dup, except this has a distinct testcase.

Comment 8

[Boris Zbarsky [:bzbarsky]]

Fixed by patch in bug 78070.