[Webkit-unassigned] [Bug 202899] New: Chromium test-case asserts with ASSERTION FAILED: candidate.isCandidate() in editing code.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=202899

            Bug ID: 202899
           Summary: Chromium test-case asserts with ASSERTION FAILED:
                    candidate.isCandidate() in editing code.
           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: emilio at crisal.io
                CC: wenson_hsieh at apple.com

On master (247b0314320d499ae788b6ea993aa1d98e2d607e / r250962), WebKitGTK build.

Running this test-case locally:

 * https://cs.chromium.org/chromium/src/third_party/blink/web_tests/editing/execCommand/insert-list-br-with-child-crash.html?rcl=753caf715d8f30f0c673f1b4b36dadfc75c3201f

Asserts like:

ASSERTION FAILED: candidate.isCandidate()
../../Source/WebCore/editing/VisiblePosition.cpp(537) : WebCore::Position WebCore::canonicalizeCandidate(const WebCore::Position&)
1   0x7f97f2c703d3 /home/emilio/src/WebKit/WebKitBuild/Debug/lib/libjavascriptcoregtk-4.0.so.18(WTFCrash+0x9) [0x7f97f2c703d3]
2   0x7f97fe9195f2 /home/emilio/src/WebKit/WebKitBuild/Debug/lib/libwebkit2gtk-4.0.so.37(_ZN3WTF15CrashOnOverflow10overflowedEv+0) [0x7f97fe9195f2]
3   0x7f9800f46329 /home/emilio/src/WebKit/WebKitBuild/Debug/lib/libwebkit2gtk-4.0.so.37(+0xcc08329) [0x7f9800f46329]
4   0x7f9800f46563 /home/emilio/src/WebKit/WebKitBuild/Debug/lib/libwebkit2gtk-4.0.so.37(_ZN7WebCore15VisiblePosition17canonicalPositionERKNS_8PositionE+0x1d7) [0x7f9800f46563]
5   0x7f9800f4427b /home/emilio/src/WebKit/WebKitBuild/Debug/lib/libwebkit2gtk-4.0.so.37(_ZN7WebCore15VisiblePosition4initERKNS_8PositionENS_9EAffinityE+0x37) [0x7f9800f4427b]
6   0x7f9800f44241 /home/emilio/src/WebKit/WebKitBuild/Debug/lib/libwebkit2gtk-4.0.so.37(_ZN7WebCore15VisiblePositionC2ERKNS_8PositionENS_9EAffinityE+0x35) [0x7f9800f44241]                                                                  
7   0x7f9800f07c8f /home/emilio/src/WebKit/WebKitBuild/Debug/lib/libwebkit2gtk-4.0.so.37(_ZN7WebCore17InsertListCommand18unlistifyParagraphERKNS_15VisiblePositionEPNS_11HTMLElementEPNS_4NodeE+0x119) [0x7f9800f07c8f]
8   0x7f9800f07ab4 /home/emilio/src/WebKit/WebKitBuild/Debug/lib/libwebkit2gtk-4.0.so.37(_ZN7WebCore17InsertListCommand25doApplyForSingleParagraphEbRKNS_17HTMLQualifiedNameEPNS_5RangeE+0x89c) [0x7f9800f07ab4]
9   0x7f9800f071a0 /home/emilio/src/WebKit/WebKitBuild/Debug/lib/libwebkit2gtk-4.0.so.37(_ZN7WebCore17InsertListCommand7doApplyEv+0x8e8) [0x7f9800f071a0]
10  0x7f98024fccd3 /home/emilio/src/WebKit/WebKitBuild/Debug/lib/libwebkit2gtk-4.0.so.37(_ZN7WebCore20CompositeEditCommand5applyEv+0xf5) [0x7f98024fccd3]
11  0x7f9800ee0dc7 /home/emilio/src/WebKit/WebKitBuild/Debug/lib/libwebkit2gtk-4.0.so.37(+0xcba2dc7) [0x7f9800ee0dc7]
12  0x7f9800ee462a /home/emilio/src/WebKit/WebKitBuild/Debug/lib/libwebkit2gtk-4.0.so.37(_ZNK7WebCore6Editor7Command7executeERKN3WTF6StringEPNS_5EventE+0xdc) [0x7f9800ee462a] 
13  0x7f9800ccf268 /home/emilio/src/WebKit/WebKitBuild/Debug/lib/libwebkit2gtk-4.0.so.37(_ZN7WebCore8Document11execCommandERKN3WTF6StringEbS4_+0x56) [0x7f9800ccf268]
14  0x7f97ff9dd694 /home/emilio/src/WebKit/WebKitBuild/Debug/lib/libwebkit2gtk-4.0.so.37(+0xb69f694) [0x7f97ff9dd694]
15  0x7f97ff9f71b6 /home/emilio/src/WebKit/WebKitBuild/Debug/lib/libwebkit2gtk-4.0.so.37(+0xb6b91b6) [0x7f97ff9f71b6]
16  0x7f97ff9dd702 /home/emilio/src/WebKit/WebKitBuild/Debug/lib/libwebkit2gtk-4.0.so.37(_ZN7WebCore38jsDocumentPrototypeFunctionExecCommandEPN3JSC14JSGlobalObjectEPNS0_9CallFrameE+0x23) [0x7f97ff9dd702]
17  0x7f979d1fa16b [0x7f979d1fa16b

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