Bug 46538 – Canvas: Crash when setting a font with size in 'ex' units

• Component: Canvas
• Status: RESOLVED FIXED

[Andreas Kling]

This test on the IE9 test center reveals a bug in WebKit:
http://samples.msdn.microsoft.com/ietestcenter/html5/canvas/canvas-text-font-002.htm

The problem is in CSSPrimitiveValue::computeLengthDouble() which assumes the passed-in style has a usable font().

[Alexey Proskuryakov]

Not a regression from Safari 5.0.2, but crashing on an ietestcenter test is not good.

I think this can be fixed by calling newStyle->font().update() after setting the font description on the newStyle.

[Andreas Kling]

Created attachment 68848 [details]
Proposed patch

Patch using mitz's suggestion.

[Andreas Kling]

Comment on attachment 68848 [details]
Proposed patch

Clearing flags on attachment: 68848

Committed r68343: <http://trac.webkit.org/changeset/68343>

[Andreas Kling]

All reviewed patches have been landed.  Closing bug.

[WebKit Review Bot]

http://trac.webkit.org/changeset/68343 might have broken GTK Linux 32-bit Release

[Andreas Kling]

Reopening since this broke GTK+.

[Andreas Kling]

CC'ing GTK+ people for a look..

[Andreas Kling]

Created attachment 68898 [details]
Proposed patch v2

Essentially the same patch, except do the update() even if !canvas()->computedStyle() (I guess if the element isn't attached to the document.)
Tested on Qt and GTK+.

[WebKit Commit Bot]

Comment on attachment 68898 [details]
Proposed patch v2

Rejecting patch 68898 from commit-queue.

Failed to run "['./WebKitTools/Scripts/webkit-patch', '--status-host=queues.webkit.org', 'apply-attachment', '--force-clean', '--non-interactive', '--quiet', 68898]" exit_code: 2
Cleaning working directory
Updating working directory
Failed to run "['WebKitTools/Scripts/update-webkit']" exit_code: 2

Full output: http://queues.webkit.org/results/4033166

[Eric Seidel (no email)]

Comment on attachment 68898 [details]
Proposed patch v2

False rejection.  Bug in the queue.  One of the cluster nodes seems stuck.

[WebKit Commit Bot]

Comment on attachment 68898 [details]
Proposed patch v2

Rejecting patch 68898 from commit-queue.

Failed to run "['./WebKitTools/Scripts/webkit-patch', '--status-host=queues.webkit.org', 'apply-attachment', '--force-clean', '--non-interactive', '--quiet', 68898]" exit_code: 2
Cleaning working directory
Updating working directory
Failed to run "['WebKitTools/Scripts/update-webkit']" exit_code: 2

Full output: http://queues.webkit.org/results/4074125

[Eric Seidel (no email)]

Comment on attachment 68898 [details]
Proposed patch v2

One of the cq nodes is misbehaving.  It should right itself shortly.  I can't access it to manually reboot it at this time.

[WebKit Commit Bot]

Comment on attachment 68898 [details]
Proposed patch v2

Rejecting patch 68898 from commit-queue.

Failed to run "['./WebKitTools/Scripts/webkit-patch', '--status-host=queues.webkit.org', 'apply-attachment', '--force-clean', '--non-interactive', '--quiet', 68898]" exit_code: 2
Cleaning working directory
Updating working directory
Failed to run "['WebKitTools/Scripts/update-webkit']" exit_code: 2

Full output: http://queues.webkit.org/results/4066158

[Eric Seidel (no email)]

Sorry.  Will wait until I know the CQ node is healthy again.

[Eric Seidel (no email)]

Comment on attachment 68898 [details]
Proposed patch v2

I repaired one of them just now.  Git got very upset by some test rebaselinings this morning.  It was failing to update.

[Eric Seidel (no email)]

Comment on attachment 68898 [details]
Proposed patch v2

Please leave the string "Reviewed by NOBODY (OOPS!)." in your ChangeLog if you want this to be handled by the commit-queue.

[Andreas Kling]

Committed r68513: <http://trac.webkit.org/changeset/68513>

[Andreas Kling]

Comment on attachment 68898 [details]
Proposed patch v2

> Please leave the string "Reviewed by NOBODY (OOPS!)." in your ChangeLog if you want this to be handled by the commit-queue.

D'oh! Thanks Eric.