[Webkit-unassigned] [Bug 266465] New: ASSERTION FAILED: isStartOfParagraph(startOfParagraphToMove) in imported/w3c/web-platform-tests/editing/run/delete.html?6001-7000

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=266465

            Bug ID: 266465
           Summary: ASSERTION FAILED:
                    isStartOfParagraph(startOfParagraphToMove) in
                    imported/w3c/web-platform-tests/editing/run/delete.htm
                    l?6001-7000
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: HTML Editing
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: vitaly at igalia.com
                CC: wenson_hsieh at apple.com

The subtest causing this assertion to fail:
```
["<span style=display:inline-table>fo[o</span><span style=display:inline-table>b]ar</span>",
    [["delete",""]],
    "<span style=\"display:inline-table\">fo[]</span><span style=\"display:inline-table\">ar</span>",
    [true],
    {"delete":[false,false,"",false,false,""]}],
```
in `LayoutTests/imported/w3c/web-platform-tests/editing/data/delete.js`

Stack trace:
```
#0  WTFCrash() () at /app/webkit/Source/WTF/wtf/Assertions.cpp:333
#1  0x00007f62f465a115 in WTFCrashWithInfo(int, char const*, char const*, int) () at /app/webkit/WebKitBuild/GTK/Debug/WTF/Headers/wtf/Assertions.h:778
#2  0x00007f62f95b133b in WebCore::CompositeEditCommand::moveParagraph(WebCore::VisiblePosition const&, WebCore::VisiblePosition const&, WebCore::VisiblePosition const&, bool, bool) (this=0x7f6006892480, startOfParagraphToMove=..., endOfParagraphToMove=..., destination=..., preserveSelection=false, preserveStyle=true) at /app/webkit/Source/WebCore/editing/CompositeEditCommand.cpp:1444
#3  0x00007f62f95cbb01 in WebCore::DeleteSelectionCommand::mergeParagraphs() (this=0x7f6006892480) at /app/webkit/Source/WebCore/editing/DeleteSelectionCommand.cpp:850
#4  0x00007f62f95ccdba in WebCore::DeleteSelectionCommand::doApply() (this=0x7f6006892480) at /app/webkit/Source/WebCore/editing/DeleteSelectionCommand.cpp:1038
#5  0x00007f62f95aa7c6 in WebCore::CompositeEditCommand::applyCommandToComposite(WTF::Ref<WebCore::EditCommand, WTF::RawPtrTraits<WebCore::EditCommand> >&&) (this=0x7f6033cd4e80, command=...) at /app/webkit/Source/WebCore/editing/CompositeEditCommand.cpp:498
#6  0x00007f62f95ad5ec in WebCore::CompositeEditCommand::deleteSelection(WebCore::VisibleSelection const&, bool, bool, bool, bool, bool) (this=0x7f6033cd4e80, selection=..., smartDelete=false, mergeBlocksAfterDelete=true, replace=false, expandForSpecialElements=true, sanitizeMarkup=true) at /app/webkit/Source/WebCore/editing/CompositeEditCommand.cpp:874
#7  0x00007f62f967eb43 in WebCore::TypingCommand::deleteKeyPressed(WebCore::TextGranularity, bool) (this=0x7f6033cd4e80, granularity=WebCore::TextGranularity::CharacterGranularity, shouldAddToKillRing=false) at /app/webkit/Source/WebCore/editing/TypingCommand.cpp:766
#8  0x00007f62f967c528 in WebCore::TypingCommand::doApply() (this=0x7f6033cd4e80) at /app/webkit/Source/WebCore/editing/TypingCommand.cpp:374
#9  0x00007f62f95aa037 in WebCore::CompositeEditCommand::apply() (this=0x7f6033cd4e80) at /app/webkit/Source/WebCore/editing/CompositeEditCommand.cpp:402
#10 0x00007f62f967b507 in WebCore::TypingCommand::deleteKeyPressed(WTF::Ref<WebCore::Document, WTF::RawPtrTraits<WebCore::Document> >&&, WTF::OptionSet<WebCore::TypingCommand::Option>, WebCore::TextGranularity) (document=..., options=..., granularity=WebCore::TextGranularity::CharacterGranularity) at /app/webkit/Source/WebCore/editing/TypingCommand.cpp:195
#11 0x00007f62f9603c27 in WebCore::executeDelete(WebCore::LocalFrame&, WebCore::Event*, WebCore::EditorCommandSource, WTF::String const&) (frame=..., source=WebCore::EditorCommandSource::DOM) at /app/webkit/Source/WebCore/editing/EditorCommand.cpp:301
#12 0x00007f62f96098f0 in WebCore::Editor::Command::execute(WTF::String const&, WebCore::Event*) const (this=0x7ffc3f2e1c80, parameter=..., triggeringEvent=0x0) at /app/webkit/Source/WebCore/editing/EditorCommand.cpp:1925
#13 0x00007f62f927a741 in WebCore::Document::execCommand(WTF::String const&, bool, WTF::String const&) (this=0x7f602d344000, commandName=..., userInterface=false, value=...) at /app/webkit/Source/WebCore/dom/Document.cpp:6409
#14 0x00007f62f6a16622 in WebCore::jsDocumentPrototypeFunction_execCommandBody(JSC::JSGlobalObject*, JSC::CallFrame*, WebCore::IDLOperation<WebCore::JSDocument>::ClassParameter) (lexicalGlobalObject=0x7f6031737260, callFrame=0x7ffc3f2e1eb0, castedThis=0x7f6291e24fa0) at /app/webkit/WebKitBuild/GTK/Debug/WebCore/DerivedSources/JSDocument.cpp:6475
#15 0x00007f62f6a3f08f in WebCore::IDLOperation<WebCore::JSDocument>::call<WebCore::jsDocumentPrototypeFunction_execCommandBody>(JSC::JSGlobalObject&, JSC::CallFrame&, char const*) (lexicalGlobalObject=..., callFrame=..., operationName=0x7f62ed7d8c27 "execCommand") at /app/webkit/Source/WebCore/bindings/js/JSDOMOperation.h:63
#16 0x00007f62f6a16703 in WebCore::jsDocumentPrototypeFunction_execCommand(JSC::JSGlobalObject*, JSC::CallFrame*) (lexicalGlobalObject=0x7f6031737260, callFrame=0x7ffc3f2e1eb0) at /app/webkit/WebKitBuild/GTK/Debug/WebCore/DerivedSources/JSDocument.cpp:6480
#17 0x00007f6294008038 in  ()
#18 0x00007ffc3f2e1f50 in  ()
#19 0x00007f629467fc53 in  ()
#20 0x0000000000000000 in  ()
```

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