TextOffsetMapping should skip anonymous LayoutBlockFlow with anonymous layout object |
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Issue descriptionDetailed report: https://clusterfuzz.com/testcase?key=5321998641922048 Fuzzer: inferno_twister Job Type: linux_ubsan_vptr_content_shell_drt Platform Id: linux Crash Type: Null-dereference READ Crash Address: 0x000000000000 Crash State: blink::TextIteratorAlgorithm<blink::EditingAlgorithm<blink::FlatTreeTraversal> > blink::TextOffsetMapping::ComputeTextOffset blink::NextWordPosition Sanitizer: undefined (UBSAN) Regressed: https://clusterfuzz.com/revisions?job=linux_ubsan_vptr_content_shell_drt&range=550102:550107 Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5321998641922048 Issue filed automatically. See https://github.com/google/clusterfuzz-tools for more information.
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Apr 12 2018
Automatically assigning owner based on suspected regression changelist https://chromium.googlesource.com/chromium/src/+/1324be868df000cb2e070199ce2d10cd0c5a2706 (Make NextWordPosition() to utilize TextOffsetMapping). If this is incorrect, please let us know why and apply the Test-Predator-Wrong-CLs label. If you aren't the correct owner for this issue, please unassign yourself as soon as possible so it can be re-triaged.
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Apr 13 2018
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Apr 13 2018
I'm working now...
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Apr 13 2018
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Apr 13 2018
Here is minimal HTML to reproduce:
<div style="columns: 51 12px"><b>foo</b></div>
<script>
const selection = window.getSelection();
selection.collapse(document.querySelector('b').firstChild, 3);
selection.modify('move', 'forward', 'word');
</script>
LayoutTree
layer at (0,0) size 800x600
LayoutView at (0,0) size 800x600
layer at (0,0) size 800x600
LayoutBlockFlow {HTML} at (0,0) size 800x600
LayoutBlockFlow {BODY} at (8,8) size 784x584
layer at (8,8) size 784x20
LayoutBlockFlow {DIV} at (0,0) size 784x20
LayoutMultiColumnSet (anonymous) at (0,0) size 784x20
layer at (8,8) size 13x20
LayoutMultiColumnFlowThread (anonymous) at (0,0) size 12.56x20
LayoutInline {B} at (0,0) size 21x19
LayoutText {#text} at (0,0) size 21x19
text run at (0,0) width 21: "foo"
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Apr 13 2018
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Apr 14 2018
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Apr 17 2018
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Apr 17 2018
Issue 833242 has been merged into this issue.
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Apr 17 2018
The following revision refers to this bug: https://chromium.googlesource.com/chromium/src.git/+/dec40a582a3805fb28dfd67ba49fc2cdb28a1b6c commit dec40a582a3805fb28dfd67ba49fc2cdb28a1b6c Author: Yoshifumi Inoue <yosin@chromium.org> Date: Tue Apr 17 04:30:18 2018 Revert "Make NextWordPosition() to utilize TextOffsetMapping" This reverts commit 1324be868df000cb2e070199ce2d10cd0c5a2706 for M67/Beta TextOffsetMapping is not ready for release. It should support edge cases. TBR=yosin@chromium.org Bug: 832055 , 832061 , 832101 , 832261 , 832350 , 832497 , 832639 , 833172 , 833180 Change-Id: Iac5f58716619a626650088a55109922daf1a4f3a Reviewed-on: https://chromium-review.googlesource.com/1013445 Reviewed-by: Yoshifumi Inoue <yosin@chromium.org> Cr-Commit-Position: refs/branch-heads/3396@{#36} Cr-Branched-From: 9ef2aa869bc7bc0c089e255d698cca6e47d6b038-refs/heads/master@{#550428} [modify] https://crrev.com/dec40a582a3805fb28dfd67ba49fc2cdb28a1b6c/third_party/blink/renderer/core/editing/visible_units_word.cc [modify] https://crrev.com/dec40a582a3805fb28dfd67ba49fc2cdb28a1b6c/third_party/blink/renderer/core/editing/visible_units_word_test.cc
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Apr 17 2018
Issue 833180 has been merged into this issue.
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Apr 17 2018
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Apr 18 2018
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Apr 19 2018
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Apr 19 2018
Issue 834623 has been merged into this issue.
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Apr 19 2018
Issue 834625 has been merged into this issue.
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Apr 23 2018
ClusterFuzz testcase 4927582869651456 is verified as fixed, so closing issue as verified. If this is incorrect, please add ClusterFuzz-Wrong label and re-open the issue.
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Apr 30 2018
ClusterFuzz testcase 5015537156096000 is still reproducing on tip-of-tree build (trunk). Please re-test your fix against this testcase and if the fix was incorrect or incomplete, please re-open the bug. Otherwise, ignore this notification and add ClusterFuzz-Wrong label. |
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Comment 1 by ClusterFuzz
, Apr 12 2018Labels: Test-Predator-Auto-Components