Assigning to the concern owner from Predator results --
The result is a list of CLs that change the crashed files. 

Author: yosin
Project: chromium
Changelist: https://chromium.googlesource.com/chromium/src/+/2211504ac2b999a125b2215ce7f6be9e50878fea
Time: Thu Mar 02 12:28:15 2017
Lines 63-64 of file PositionIterator.cpp which potentially caused crash are changed in this cl (frame #6, "blink::PositionIteratorAlgorithm >::PositionIteratorAlgorithm").
Minimum distance from crash line to modified line: 0. (file: PositionIterator.cpp, crashed on: 64, modified: 64).

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

ClusterFuzz has detected this issue as fixed in range 456626:457730.

Detailed report: https://clusterfuzz.com/testcase?key=5491755249303552

Fuzzer: bj_broddelwerk
Job Type: mac_asan_chrome
Platform Id: mac

Crash Type: UNKNOWN READ
Crash Address: 0x000000000010
Crash State:
  blink::FlatTreeTraversal::traverseChild
  blink::FlatTreeTraversal::childAt
  blink::PositionIteratorAlgorithm<blink::EditingAlgorithm<blink::FlatTreeTraversa
  
Sanitizer: address (ASAN)

Regressed: https://clusterfuzz.com/revisions?job=mac_asan_chrome&range=454233:454289
Fixed: https://clusterfuzz.com/revisions?job=mac_asan_chrome&range=456626:457730

Reproducer Testcase: https://clusterfuzz.com/download/AMIfv96GooL-F0cvkLcpa9cD777TcUYdlIVnCmCgVLEhkSrgDKZbxBDQiPVRFxdP7FD8KAAqrYS4zQV7IHQorVYIknowPimjdYXrM7Husuz-rAXPk8lV0QUPUjqh5jSBOeq7dxRyk3bFITqM2vtWamoOkgOfrGwPLZSn1SDM-DSrdUmH55CuK4bf58CUfB4sjXgvoxBKl0a7sRFEcFB4e6w9h4psWBViDj2GZvtXFgMUEHHo6UGJdXF9dAEakMCKLZuIr8NSfOMmHkfSH0NugITJFK4YE8vnmWP_pBnBk5newrq09H2jnE0FKjNu-M5c_W1bodVcwucfyy5KPP7WUCXZV45t0919SY4dFA2GcKelU7PGReQ192dsK4gjl1VooEymVcEHQKgwseVYaQFtjMIuuLaMlqW_kA?testcase_id=5491755249303552


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 5491755249303552 is verified as fixed, so closing issue.

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