493910 - Hang or abort with "yikes! spinning on a line over 1000 times!" involving float, large height and letter-spacing using debug build

Status: RESOLVED WORKSFORME

(Core :: Layout, defect)

Description

[Jesse Ruderman]

Attachment: testcase (causes debug build to abort when loaded)

Loading the testcase in a debug build triggers two assertions followed by an abort.  In an opt build, it takes a few seconds to lay out but does *not* hang.

###!!! ASSERTION: This coordinate should be constrained: 'a != nscoord_MAX', file nsCoord.h, line 243

###!!! ASSERTION: unconstrained height on totally empty line: 'NS_UNCONSTRAINEDSIZE != floatAvailableSpace.mRect.height', file layout/generic/nsBlockFrame.cpp, line 3595

Block(body)(1)@0x16b0b9c: yikes! spinning on a line over 1000 times!
###!!! ABORT: file layout/generic/nsBlockFrame.cpp, line 3379

Comment 1

[Wayne Mery (:wsmwk)]

Does this still occur?

Comment 2

[Jesse Ruderman]

The abort was removed in bug 545261. The testcase still hangs debug builds but not opt builds.

Comment 3

[Hallvord R. M. Steen [:hallvors]]

Works for me, I believe. Loaded TC in a locally build binary with debug enabled in mozconfig, no hang. NI Jesse for verification.

Comment 4

[Hallvord R. M. Steen [:hallvors]]

Hm.. disabled E10S and re-tested. Firefox was stuck in "Not responding" mode for I'd guess around 5 seconds while loading this page. Jesse: is that what this report is about, or is it a permanent hang?