Unable to provide possible suspect using Predator, CL and Code Search.
Could someone please look into the issue.

Thank You...

ClusterFuzz has detected this issue as fixed in range 578968:578969.

Detailed report: https://clusterfuzz.com/testcase?key=5989221178015744

Fuzzer: quic_fuzzer
Job Type: linux_asan_chrome_mp
Platform Id: linux

Crash Type: CHECK failure
Crash Address: 
Crash State:
  result.second. Inserting a duplicate item in render_frame_proxy.cc
  content::RenderFrameProxy::RenderFrameProxy
  content::RenderFrameProxy::CreateFrameProxy
  
Sanitizer: address (ASAN)

Fixed: https://clusterfuzz.com/revisions?job=linux_asan_chrome_mp&range=578968:578969

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5989221178015744

Additional requirements: Requires Gestures

See https://github.com/google/clusterfuzz-tools 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 5989221178015744 is verified as fixed, so closing issue as verified.

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