2020-04-01 15:02 BST

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IDProjectCategoryView StatusLast Update
0002690NetSurfLayoutpublic2020-02-21 10:17
ReporterMichael Drake 
Assigned ToMichael Drake 
SeveritymajorReproducibilityunable to reproduce 
PlatformAnyOSOS Version
Product Version 
Target Version3.10Fixed in Version3.10 
Summary0002690: Animated GIF causes box_coords to explode
Descriptionbox_coords walks up the box tree to find the absolute position of the box.

If we hit a float box, we expect to find a box with it's float_children set.

If not, the box tree is broken.

Daniel observed this happening on the 500 sites test run.

The problem is not easily reproducible.
Steps To ReproduceVisit https://www.netsons.com/

Although, when I load it, I don't even get the animated GIF throbbers that Daniel gets when he loads it.
TagsNo tags attached.
Fixed in CI build #
Reported in CI build #
URL of problem pagehttps://www.netsons.com/
Attached Files


Michael Drake


Michael Drake (administrator)

This change may or may not help:


Either way, it's generally more optimal.
Michael Drake


Michael Drake (administrator)


Neither float_children or float_container are assigned until layout.

However, it doesn't make sense to call box_coords on something before layout has happened.
Michael Drake


Michael Drake (administrator)


We don't set float_children or float_container until layout because layout is the first pass over the box tree that works out which boxes will establish a new block formatting context.
Michael Drake


Michael Drake (administrator)

Potentially fixed by:


-Issue History
Date Modified Username Field Change
2019-08-06 09:21 Michael Drake New Issue
2019-08-06 09:23 Michael Drake Note Added: 0002066
2019-08-06 09:26 Michael Drake Note Added: 0002067
2019-08-06 09:27 Michael Drake Note Added: 0002068
2019-08-06 09:43 Michael Drake Note Added: 0002069
2019-08-06 10:14 Michael Drake Status new => acknowledged
2020-02-21 10:17 Michael Drake Assigned To => Michael Drake
2020-02-21 10:17 Michael Drake Reproducibility have not tried => unable to reproduce
2020-02-21 10:17 Michael Drake Status acknowledged => resolved
2020-02-21 10:17 Michael Drake Resolution open => fixed
2020-02-21 10:17 Michael Drake Fixed in Version => 3.10
+Issue History