772440 - Intermittent failure (single dark pixel in middle of page) of layout/reftests/font-inflation/threshold-input-text-contents-under-2.html

Status: RESOLVED WORKSFORME

(Core :: Layout, defect)

Description

[Ed Morley [:emorley]]

Rev4 MacOSX Snow Leopard 10.6 mozilla-inbound opt test reftest on 2012-07-09 05:22:15 PDT for push 8774a43f10bf

slave: talos-r4-snow-013

https://tbpl.mozilla.org/php/getParsedLog.php?id=13351727&tree=Mozilla-Inbound

{
REFTEST TEST-START | file:///Users/cltbld/talos-slave/test/build/reftest/tests/layout/reftests/font-inflation/threshold-input-text-contents-under-2.html | 4180 / 8037 (52%)
RESTORE PREFERENCE pref(font.size.inflation.emPerLine,0)
RESTORE PREFERENCE pref(font.size.inflation.lineThreshold,400)
REFTEST TEST-START | file:///Users/cltbld/talos-slave/test/build/reftest/tests/layout/reftests/font-inflation/threshold-input-text-contents-under-2.html | 4180 / 8037 (52%)
REFTEST TEST-UNEXPECTED-FAIL | file:///Users/cltbld/talos-slave/test/build/reftest/tests/layout/reftests/font-inflation/threshold-input-text-contents-under-2.html | image comparison (==)
REFTEST number of differing pixels: 1 max difference: 32
}

Comment 1

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

This is a random dark pixel off in the middle of the page, running the test.  From reftest-analyzer's analysis of the single pixel difference:

Pixel at 244,262
Image 1: #232323 rgb(35,35,35)
Image 2: #ffffff rgb(255,255,255)

Could be any form of memory corruption, really, and I don't see any reason to think it's at all related to what the test is testing.

Comment 2

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

Note that this was on talos-r4-snow-013, which is a machine I'm slightly suspicious of, primarily because it's the neighbor of talos-r4-snow-014, which has the problems described in bug 785724, and this is the only similar problem that I'm aware of.

Comment 3

[Ed Morley [:emorley]]

Resolving WFM keyword:intermittent-failure bugs last modified >3 months ago, whose whiteboard contains none of:
{random,disabled,marked,fuzzy,todo,fails,failing,annotated,time-bomb,leave open}

There will inevitably be some false positives; for that (and the bugspam) I apologise. Filter on orangewfm.