[Webkit-unassigned] [Bug 140050] New: REGRESSION: fast/text/international/text-spliced-font.html sometimes crashes in GlyphPageTreeNode::page()

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=140050

            Bug ID: 140050
           Summary: REGRESSION:
                    fast/text/international/text-spliced-font.html
                    sometimes crashes in GlyphPageTreeNode::page()
    Classification: Unclassified
           Product: WebKit
           Version: 528+ (Nightly build)
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P1
         Component: Text
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: ap at webkit.org
                CC: koivisto at iki.fi, mmaxfield at apple.com,
                    webkit-bug-importer at group.apple.com

fast/text/international/text-spliced-font.html has started to sometimes crash in late December (first recorded crash was on December 29).

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   com.apple.WebCore                 0x000000010f9b2a9c WTF::RefPtr<WebCore::GlyphPage>::get() const + 12
1   com.apple.WebCore                 0x000000010f9b1dac WebCore::GlyphPageTreeNode::page() const + 28
2   com.apple.WebCore                 0x0000000110d5cf4c WebCore::SimpleFontData::platformGlyphInit() + 44
3   com.apple.WebCore                 0x0000000110d5cf02 WebCore::SimpleFontData::SimpleFontData(WebCore::FontPlatformData const&, bool, bool, bool) + 946
4   com.apple.WebCore                 0x0000000110d5d13b WebCore::SimpleFontData::SimpleFontData(WebCore::FontPlatformData const&, bool, bool, bool) + 91
5   com.apple.WebCore                 0x000000010f3b4dfe WebCore::SimpleFontData::create(WebCore::FontPlatformData const&, bool, bool, bool) + 126
6   com.apple.WebCore                 0x000000010f99a19a WebCore::FontCache::getCachedFontData(WebCore::FontPlatformData const*, WebCore::FontCache::ShouldRetain) + 394
7   com.apple.WebCore                 0x000000010f999ffd WebCore::FontCache::getCachedFontData(WebCore::FontDescription const&, WTF::AtomicString const&, bool, WebCore::FontCache::ShouldRetain) + 141
8   com.apple.WebCore                 0x000000010f5572fb WebCore::CSSFontSelector::getFontData(WebCore::FontDescription const&, WTF::AtomicString const&) + 267

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