Bug 106632 - getComputedStyle on animation from pixels to percent returns null or asserts
Summary: getComputedStyle on animation from pixels to percent returns null or asserts
Status: RESOLVED CONFIGURATION CHANGED
Alias: None
Product: WebKit
Classification: Unclassified
Component: Layout and Rendering (show other bugs)
Version: 528+ (Nightly build)
Hardware: Unspecified Unspecified
: P2 Normal
Assignee: Mike Lawther
URL:
Keywords: HasReduction
Depends on: 29084
Blocks:
  Show dependency tree / graph
 
Reported: 2013-01-10 21:42 PST by Elliott Sprehn
Modified: 2022-08-30 02:23 PDT (History)
12 users (show)

See Also:

Attachments
Reduction (1.79 KB, text/html)
2013-01-10 21:42 PST, Elliott Sprehn 		no flags Details
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Description Elliott Sprehn 2013-01-10 21:42:05 PST 
Created attachment 182263 [details]
Reduction

If you're transitioning on a length property from a pixel value to a percent and you call getComputedStyle to check the current value we return null because you end up in CSSPrimitiveValue::CSSPrimitiveValue(const Length& length) with the type Calculated which hits an ASSERT_NOT_REACHED();

In a release build we return null because of error handling in CSSComputedStyleDeclaration.
Comment 1 Tab Atkins 2013-01-11 13:17:41 PST 
+ccing Mike Lawther, as he's the calc() author.
Comment 2 Tim 'mithro' Ansell 2013-02-12 00:38:01 PST 
This appears to actually be related to Bug 29084, top/bottom/left/right all seem to work differently and hence behave as this bug reports. Width works as expected by this test.
Comment 3 Tim 'mithro' Ansell 2013-02-21 20:48:55 PST 
This issue is fixed by the patch found in Bug 29084.
Comment 6 Ahmad Saleem 2022-08-30 02:23:06 PDT 
I am not able to reproduce this bug in Safari 15.6.1 and it shows as intended all values (though it shows animation is 60 fps compared to other browser, which show 120 fps) but since all other browsers (Chrome Canary 107 and Firefox Nightly 106) also work. I am going to mark this as "RESOLVED CONFIGURATION CHANGED". Thanks!