Bug 16614

Summary: REGRESSION(r26359-26570): Points in SVG kNN correlation model do not appear in ToT
Product: WebKit Reporter: Matt Lilek <dev+webkit>
Component: SVGAssignee: Rob Buis <rwlbuis>
Severity: Normal CC: ademar, commit-queue, eric, gsherloc, rwlbuis
Priority: P1 Keywords: HasReduction, Regression
Version: 528+ (Nightly build)   
Hardware: All   
OS: All   
URL: http://www.cip.ifi.lmu.de/~schubert/kovar/
Description Flags
drt-compatible test case
Patch eric: review+, eric: commit-queue+

Description Matt Lilek 2007-12-26 14:23:34 PST
The points in the model at http://www.cip.ifi.lmu.de/~schubert/kovar/ do not appear in ToT (r28986).  The site works fine in Safari 3.0.4.
Comment 1 Eric Seidel (no email) 2007-12-26 16:00:38 PST
This seems to be the reduction:

<svg xmlns="http://www.w3.org/2000/svg">
  <circle transform="scale(1000)" r="0.1" opacity=".99"/>

(thanks Sam!)
Comment 2 Eric Seidel (no email) 2007-12-26 16:15:33 PST
Created attachment 18120 [details]
Comment 3 Eric Seidel (no email) 2007-12-26 16:18:14 PST
Created attachment 18121 [details]
drt-compatible test case
Comment 4 Eric Seidel (no email) 2007-12-26 16:36:35 PST
bisect-builds says:

Works: r26359  Fails: r26570
Comment 5 Eric Seidel (no email) 2007-12-26 21:03:41 PST
My suspicion is that some calculation changed to use ints instead of floats which should not have.
Comment 6 Gavin Sherlock 2009-09-19 01:44:53 PDT
Is the result of the test supposed to be a green square?  If so, this looks like it works correctly, both in Safari 4.03, and the latest nightly (r48518).  The original bug url also seems to work, in that the points in the model do appear.  I'm not able to determine when this progressed, as the oldest nightly build that I can test on 10.6 seems to work.  Would be nice if there were a test case added (if there isn't already), but I think this can be closed.
Comment 7 Rob Buis 2011-05-15 14:59:50 PDT
Created attachment 93591 [details]
Comment 8 Rob Buis 2011-05-15 15:00:40 PDT
(In reply to comment #7)
> Created an attachment (id=93591) [details]
> Patch

See the ChangeLog, the bug is fixed but I think it may be a good idea to keep Eric's reduction test around.

Comment 9 Eric Seidel (no email) 2011-05-15 16:03:43 PDT
Comment on attachment 93591 [details]

Comment 10 Rob Buis 2011-05-15 16:21:11 PDT
Committed r86514: <http://trac.webkit.org/changeset/86514>
Comment 11 Alexey Proskuryakov 2011-05-15 21:02:13 PDT
Is the expected result really platform specific? It's just a green square.
Comment 12 Ademar Reis 2011-05-17 09:55:59 PDT
FYI, this problem affects QtWebKit with current trunk. Not sure if it has the same root cause, but the "symptoms" are the same. Opened bug 60968 to track it.