[Webkit-unassigned] [Bug 35973] New: [Qt] fast/multicol/hit-test-above-or-below.html fails

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=35973

           Summary: [Qt]  fast/multicol/hit-test-above-or-below.html fails
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Keywords: LayoutTestFailure, Qt
          Severity: Normal
          Priority: P3
         Component: New Bugs
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: ossy at webkit.org


fast/multicol/hit-test-above-or-below.html is a new test introduced in
http://trac.webkit.org/changeset/55546

result:
http://build.webkit.org/results/Qt%20Linux%20Release/r55780%20%288339%29/results.html

diff:
-Character at 750, 275 is null as expected.
+FAIL: Character at 750, 275 is m. Expected null.

-Character at 750, 475 is null as expected.
+FAIL: Character at 750, 475 is m. Expected null.

I made some experiment to find what cause this differences. I 
compared our pixel result to result of Leopard, they are same.

But the render tree dump is different:

-        RenderBlock (anonymous) at (0,0) size 188x50
-          RenderText {#text} at (0,0) size 150x50
-            text run at (0,0) width 150: "123"
-        RenderBlock {DIV} at (0,50) size 188x70 [bgcolor=#0000FF]
-        RenderBlock (anonymous) at (0,120) size 188x100
-          RenderText {#text} at (0,0) size 150x50
-            text run at (0,0) width 150: "abc"
+        RenderBlock (anonymous) at (0,0) size 188x50
+          RenderText {#text} at (0,0) size 150x49
+            text run at (0,0) width 150: "123"
+        RenderBlock {DIV} at (0,50) size 188x70 [bgcolor=#0000FF]
+        RenderBlock (anonymous) at (0,120) size 188x100
+          RenderText {#text} at (0,0) size 150x49
+            text run at (0,0) width 150: "abc" 
...

Only the height of lines differs, the expected is 50, but we got 49.

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