Detailed report: https://clusterfuzz.com/testcase?key=6254077758144512

Fuzzer: inferno_twister
Job Type: linux_ubsan_chrome
Platform Id: linux

Crash Type: Integer-overflow
Crash Address: 
Crash State:
  position_mark
  position_around_base
  position_cluster
  
Sanitizer: undefined (UBSAN)

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=6254077758144512

Issue filed automatically.

See https://github.com/google/clusterfuzz-tools for more information.