[Webkit-unassigned] [Bug 117020] New: Reproducible crash with triple-finger-tap "define word" gesture on a Netflix video

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=117020

           Summary: Reproducible crash with triple-finger-tap "define
                    word" gesture on a Netflix video
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit2
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: timothy_horton at apple.com
                CC: rniwa at webkit.org, deniau at apple.com


100% repro. Open a Netflix video, then three-finger-tap on it.

In a debug build, I see:

ASSERTION FAILED: count == 0
0x10d457240 WTFCrash
0x10f99c1b5 WebCore::CharacterIterator::advance(int)
0x10f99d1ae WebCore::characterSubrange(WebCore::CharacterIterator&, int, int)
0x10f99d139 WebCore::TextIterator::subrange(WebCore::Range*, int, int)
0x10bbd9218 WebKit::WebPage::performDictionaryLookupAtLocation(WebCore::FloatPoint const&)

In a release build:

KERN_INVALID_ADDRESS at 0x0000000000000010
com.apple.WebCore                 0x000000010a21e1c2 WebCore::characterSubrange(WebCore::CharacterIterator&, int, int) + 98
com.apple.WebCore                 0x000000010a21e136 WebCore::TextIterator::subrange(WebCore::Range*, int, int) + 134
com.apple.WebKit2                 0x000000010984ee6e WebKit::WebPage::performDictionaryLookupAtLocation(WebCore::FloatPoint const&) + 1920

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