[Webkit-unassigned] [Bug 127038] New: ASSERTION FAILED: start.isNotNull() in WebCore::ApplyStyleCommand::removeInlineStyle

Wed Jan 15 02:26:23 PST 2014

https://bugs.webkit.org/show_bug.cgi?id=127038

           Summary: ASSERTION FAILED: start.isNotNull() in
                    WebCore::ApplyStyleCommand::removeInlineStyle
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: HTML Editing
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: reni at webkit.org
            Blocks: 116980

Created an attachment (id=221249)
 --> (https://bugs.webkit.org/attachment.cgi?id=221249&action=review)
Test case

The failing test:

<head>
<style>@charset "ISO-8859-7";

* { 
    display:run-in;
}

</style></head>
<frameset onload="document.designMode='on'; document.execCommand('selectall'); document.execCommand('italic'); document.execCommand('RemoveFormat');">
</frameset>

The backtrace:

ASSERTION FAILED: start.isNotNull()
/home/reni/Data/REPOS/webkit_sec/Source/WebCore/editing/ApplyStyleCommand.cpp(1089) : void WebCore::ApplyStyleCommand::removeInlineStyle(WebCore::EditingStyle*, const WebCore::Position&, const WebCore::Position&)
1   0x7ffff5c35e44 WTFCrash
2   0x7ffff1014810 WebCore::ApplyStyleCommand::removeInlineStyle(WebCore::EditingStyle*, WebCore::Position const&, WebCore::Position const&)
3   0x7ffff1011cf4 WebCore::ApplyStyleCommand::applyInlineStyle(WebCore::EditingStyle*)
4   0x7ffff100f123 WebCore::ApplyStyleCommand::doApply()
5   0x7ffff101eaf8 WebCore::CompositeEditCommand::applyCommandToComposite(WTF::PassRefPtr<WebCore::EditCommand>)
6   0x7ffff107b595 WebCore::RemoveFormatCommand::doApply()
7   0x7ffff101e8b8 WebCore::CompositeEditCommand::apply()
8   0x7ffff101e6b0 WebCore::applyCommand(WTF::PassRefPtr<WebCore::CompositeEditCommand>)
9   0x7ffff1042399 WebCore::Editor::removeFormattingAndStyle()
10  0x7ffff10566a8
11  0x7ffff1058205 WebCore::Editor::Command::execute(WTF::String const&, WebCore::Event*) const
12  0x7ffff0f1afaa WebCore::Document::execCommand(WTF::String const&, bool, WTF::String const&)
13  0x7ffff1dc34f3 WebCore::jsDocumentPrototypeFunctionExecCommand(JSC::ExecState*)
14  0x7fff9dc5c0e5

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff5c35e49 in WTFCrash () at /home/reni/Data/REPOS/webkit_sec/Source/WTF/wtf/Assertions.cpp:333
333        *(int *)(uintptr_t)0xbbadbeef = 0;
(gdb) bt
#0  0x00007ffff5c35e49 in WTFCrash () at /home/reni/Data/REPOS/webkit_sec/Source/WTF/wtf/Assertions.cpp:333
#1  0x00007ffff1014810 in WebCore::ApplyStyleCommand::removeInlineStyle (this=0x1205e40, style=0x11e04e0, start=..., end=...)
    at /home/reni/Data/REPOS/webkit_sec/Source/WebCore/editing/ApplyStyleCommand.cpp:1089
#2  0x00007ffff1011cf4 in WebCore::ApplyStyleCommand::applyInlineStyle (this=0x1205e40, style=0x11e04e0)
    at /home/reni/Data/REPOS/webkit_sec/Source/WebCore/editing/ApplyStyleCommand.cpp:637
#3  0x00007ffff100f123 in WebCore::ApplyStyleCommand::doApply (this=0x1205e40)
    at /home/reni/Data/REPOS/webkit_sec/Source/WebCore/editing/ApplyStyleCommand.cpp:220
#4  0x00007ffff101eaf8 in WebCore::CompositeEditCommand::applyCommandToComposite (this=0x1201ae0, prpCommand=...)
    at /home/reni/Data/REPOS/webkit_sec/Source/WebCore/editing/CompositeEditCommand.cpp:278
#5  0x00007ffff107b595 in WebCore::RemoveFormatCommand::doApply (this=0x1201ae0)
    at /home/reni/Data/REPOS/webkit_sec/Source/WebCore/editing/RemoveFormatCommand.cpp:92
#6  0x00007ffff101e8b8 in WebCore::CompositeEditCommand::apply (this=0x1201ae0)
    at /home/reni/Data/REPOS/webkit_sec/Source/WebCore/editing/CompositeEditCommand.cpp:227
#7  0x00007ffff101e6b0 in WebCore::applyCommand (command=...) at /home/reni/Data/REPOS/webkit_sec/Source/WebCore/editing/CompositeEditCommand.cpp:182
#8  0x00007ffff1042399 in WebCore::Editor::removeFormattingAndStyle (this=0x7c8620) at /home/reni/Data/REPOS/webkit_sec/Source/WebCore/editing/Editor.cpp:914
#9  0x00007ffff10566a8 in WebCore::executeRemoveFormat (frame=...) at /home/reni/Data/REPOS/webkit_sec/Source/WebCore/editing/EditorCommand.cpp:985
#10 0x00007ffff1058205 in WebCore::Editor::Command::execute (this=0x7fffffffb930, parameter=..., triggeringEvent=0x0)
    at /home/reni/Data/REPOS/webkit_sec/Source/WebCore/editing/EditorCommand.cpp:1744
#11 0x00007ffff0f1afaa in WebCore::Document::execCommand (this=0x11c8380, commandName=..., userInterface=false, value=...)
    at /home/reni/Data/REPOS/webkit_sec/Source/WebCore/dom/Document.cpp:4215
#12 0x00007ffff1dc34f3 in WebCore::jsDocumentPrototypeFunctionExecCommand (exec=0x7fff8fffff40)
    at /home/reni/Data/REPOS/webkit_sec/WebKitBuild/Debug/DerivedSources/WebCore/JSDocument.cpp:3369
#13 0x00007fff9dc5c0e5 in ?? ()
#14 0x00007fff8fffff90 in ?? ()
#15 0x00007ffff5c233e1 in llint_op_call () from /home/reni/Data/REPOS/webkit_sec/WebKitBuild/Debug/lib/libjavascriptcore_efl.so.0
#16 0x00007fff9dc5c900 in ?? ()
#17 0x00000000011418b8 in ?? ()
#18 0x0000000001151830 in ?? ()
#19 0x00007fffedae29a0 in thread_context_stack () from /home/reni/Data/REPOS/webkit_sec/WebKitBuild/Dependencies/Root/lib64/libglib-2.0.so.0
#20 0x00000000008c9610 in ?? ()
#21 0x00007ffff13dd20e in WebCore::ResourceLoader::didReceiveBuffer (this=0x7fff8fffff90, buffer=..., encodedDataLength=0)
    at /home/reni/Data/REPOS/webkit_sec/Source/WebCore/loader/ResourceLoader.cpp:513
#22 0x00007fffffffbad0 in ?? ()
#23 0x00007ffff59dea38 in JSC::JITCode::execute (this=0xc78948da89480000, vm=0x1b9c8458b48e0, protoCallFrame=0x758d48ff7456f5e8, 
    topOfStack=0xc78948d68948e045) at /home/reni/Data/REPOS/webkit_sec/Source/JavaScriptCore/jit/JITCode.cpp:48
Backtrace stopped: previous frame inner to this frame (corrupt stack?)

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