providing findit results for internal purpose:

Suspected CLs	Findit could not determine the memory tool from the stacktrace. Is it in a new format?

using codesearch, seeing some recent changes to 'InsertListCommand.cpp' in https://chromium.googlesource.com/chromium/src/+/77d3f608442242cdd7cc5bf672dfca9abe32bbab

dglazkov@, Could you please take a look at the issue and assign it to concerned developer if your changes are not responsible?

Lower to Pri-2, since real world usage of InsertUnorderedList is low.

DOM tree at assertion:

*#document	000003C0852E24A0 (editable)
	HTML	000003C0852E2FD0 (editable)
		BODY	000003C0852E3298 (editable)
			UL	000003C0852E41F8 (editable)
				LI	000003C0852E4260 (editable)
					#text	000003C0852E4458 "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
				LI	000003C0852E44A8 (editable)
					SELECT	000003C0852E4638 (editable)
						#shadow-root	000003C0852E4798
							CONTENT	000003C0852E4868
						#text	000003C0852E4920 "\n"
						OPTION	000003C0852E4970 (editable)
							#shadow-root	000003C0852E49E8
							#text	000003C0852E4AB8 "\n"
					#text	000003C0852E4B70 "\n"
					#text	000003C0852E4BC0 "\n\nb x"
			#text	000003C0852E3350 ""
			HEAD	000003C0852E3038 (editable)
				STYLE	000003C0852E30A0 (editable)
					#text	000003C0852E3130 "\n*{text-align:justify;-webkit-appearance:progress-bar;"
				#text	000003C0852E3180 "\n\n"
			P	000003C0852E33A0 (editable)
			#text	000003C0852E3408 "\n"
			TABLE	000003C0852E3458 (editable)
				TBODY	000003C0852E3C30 (editable)

Removing EditIssue view restrictions from ClusterFuzz filed bugs. If you believe that this issue should still be restricted, please reapply the label.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

ClusterFuzz has detected this issue as fixed in range 431810:431812.

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=5222464330399744

Fuzzer: inferno_layout_test_unmodified
Job Type: linux_debug_content_shell_drt
Platform Id: linux

Crash Type: CHECK failure
Crash Address: 
Crash State:
  endOfSelection.isNotNull() in InsertListCommand.cpp
  blink::InsertListCommand::doApply
  blink::CompositeEditCommand::apply
  
Regressed: https://cluster-fuzz.appspot.com/revisions?job=linux_debug_content_shell_drt&range=268656:269696
Fixed: https://cluster-fuzz.appspot.com/revisions?job=linux_debug_content_shell_drt&range=431810:431812

Minimized Testcase (1.43 Kb): https://cluster-fuzz.appspot.com/download/AMIfv961Y5We8QPmOHGWL56OeEO06Fz8t9bzVH3ZrekeB_tsBW4UrshtsarYRBV_ab2S8h_NwXy8jD4SzE8Bvw_y-S2JP-PCabP3QJEHsx2BFTJHguUBSAept0QbJqkPcSUQR9cCpHwpWBj5RQS1XsYo1oJiiJoWBg?testcase_id=5222464330399744

See https://dev.chromium.org/Home/chromium-security/bugs/reproducing-clusterfuzz-bugs for more information.

If you suspect that the result above is incorrect, try re-doing that job on the test case report page.

ClusterFuzz testcase 5222464330399744 is verified as fixed, so closing issue.

If this is incorrect, please add ClusterFuzz-Wrong label and re-open the issue.