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

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Unable to find the possible suspect using Find it and CL (no regression range).
Assigning to the concern owner who previously worked on similar issue.

@yosin -- Could you please look into the issue, kindly re-assign if this is not related to your change.
Thank You.

Here is DOM tree at DCHECK()

caretPosition.showTreeForThis()
[61536:44292:1130/164627:1811223296:INFO:position.cpp(612)] 
BODY
*	RBC class="CLASS3"
	OBJECT
		#shadow-root
			CONTENT
		#text "\n"
		svg
			#text "\n"
			ellipse
				#text "\n"
				animate
					#text "\n"
					title
						#text "\n"
						BUTTON
							#text "\n"
							DIV
								#text "\n"
								KBD
									#text "\n"
									DIV
										#text "\n"
										INPUT
											#shadow-root
												DIV id="inner-editor"
										#text "\n"
										FORM
											#text "\n"
											DELNL"
												#text "\n"
												RUBY
													#text "\n"
						BUTTON
							#text "\n"
							RUBY
								#text "\n"
								RB
									#text "\n"
								RTC
									#text "\n"
									RT
										#text "\n"
										svg
											#text "\n"
											use
												#shadow-root
												#text "\n"
												animateColor
													#text "\n"
													desc
														#text "\n"
														METADATA
															#text "\n"
															FOREIGNOBJECT
																#text "\n"
																BLOCKQUOTE
																	#text "\n"
																	H2
																		#text "\n"
																		TEXTAREA
																			#shadow-root
																				DIV id="inner-editor"
																		#text "\n"
																		RUBY
																			#text "\n"
																			RBC
																				#text "\n"
																				RB
																					#text "\n"
																					FOREIGNOBJECT
																						#text "\n\n"
																						CLIPPATH
																							#text "\n"
																							svg
																								#text "\n"
																								a
																									#text "\n"
																							I
																								#text "\n"
																								INPUT
																									#shadow-root
																										DIV id="inner-editor"
																								#text "\n"
																								RUBY
																									#text "\n"
offsetInAnchor[0]
<void>

ClusterFuzz has detected this issue as fixed in range 449972:450031.

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=6632941821362176

Fuzzer: inferno_layout_test_unmodified
Job Type: linux_debug_content_shell_drt
Platform Id: linux

Crash Type: CHECK failure
Crash Address: 
Crash State:
  caretLayoutItem.isDescendantOf(caretPainterItem) in CaretBase.cpp
  blink::mapCaretRectToCaretPainter
  blink::CaretBase::updateCaretRect
  
Sanitizer: address (ASAN)

Regressed: https://cluster-fuzz.appspot.com/revisions?job=linux_debug_content_shell_drt&range=297440:297710
Fixed: https://cluster-fuzz.appspot.com/revisions?job=linux_debug_content_shell_drt&range=449972:450031

Reproducer Testcase: https://cluster-fuzz.appspot.com/download/AMIfv975FG4jYTRgP3ntgLqZ2vI5HOvyP6_p5HMVotbcQcQz0f7kHhIqM3Yr0vZ4lHHiIduUoErUcY8doA53rT0c0FWuLFV65iXigQ4dsxVi3OUVV9VFsM3R0CHns2c3Wbygup5VGKQcd8gStmNRAwl_9vKNfPGU1w?testcase_id=6632941821362176


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 6632941821362176 is verified as fixed, so closing issue.

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