[Webkit-unassigned] [Bug 51466] New: chrome.dll!WebCore::Font::xHeight ReadAV at NULL (15af5145b4290aa1c6bccd7c516491f9)

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=51466

           Summary: chrome.dll!WebCore::Font::xHeight ReadAV at NULL
                    (15af5145b4290aa1c6bccd7c516491f9)
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: PC
        OS/Version: Windows Vista
            Status: NEW
          Severity: Normal
          Priority: P1
         Component: Canvas
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: skylined at chromium.org
                CC: eric at webkit.org, mdelaney at apple.com


Created an attachment (id=77211)
 --> (https://bugs.webkit.org/attachment.cgi?id=77211&action=review)
Repro

http://code.google.com/p/chromium/issues/detail?id=67786

Repro:
<script>
  oContext2d=document.getCSSCanvasContext("2d","",0);
  oContext2d.font="small-caps 1ex fantasy";
</script>

id:             chrome.dll!WebCore::Font::xHeight ReadAV at NULL (15af5145b4290aa1c6bccd7c516491f9)
description:    Attempt to read from unallocated NULL pointer+0x30 in chrome.dll!WebCore::Font::xHeight
stack:          chrome.dll!WebCore::Font::xHeight
                chrome.dll!WebCore::CSSPrimitiveValue::computeLengthDouble
                chrome.dll!WebCore::CSSPrimitiveValue::computeLengthFloat
                chrome.dll!(unknown)
                chrome.dll!(unknown)
                chrome.dll!WebCore::CSSStyleSelector::applyPropertyToStyle
                chrome.dll!WebCore::CanvasRenderingContext2D::setFont
                chrome.dll!WebCore::CanvasRenderingContext2DInternal::fontAttrSetter
                chrome.dll!v8::internal::JSObject::SetPropertyWithCallback
                chrome.dll!v8::internal::JSObject::SetProperty
                chrome.dll!v8::internal::JSObject::SetProperty
                chrome.dll!v8::internal::StoreIC::Store
                chrome.dll!v8::internal::StoreIC_Miss
                chrome.dll!v8::internal::Invoke
                chrome.dll!v8::internal::Execution::Call
                ...

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