Flag gating access to this block was enabled here: https://chromium.googlesource.com/v8/v8/+/36d703778ccd0d2777e0d4b69ed6e65e39a9f521

This is a serious security regression. If you are not able to fix this quickly, please revert the change that introduced it.

If this doesn't affect a release branch, or has not been properly classified for severity, please update the Security_Impact or Security_Severity labels, and remove the ReleaseBlock label. To disable this altogether, apply ReleaseBlock-NA.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

This is the same as  issue 761980 .

Fix: https://chromium-review.googlesource.com/c/v8/v8/+/655081 

ClusterFuzz has detected this issue as fixed in range 500577:500590.

Detailed report: https://clusterfuzz.com/testcase?key=4653823351324672

Fuzzer: libFuzzer_v8_script_parser_fuzzer
Job Type: libfuzzer_chrome_asan_debug
Platform Id: linux

Crash Type: DCHECK failure
Crash Address: 
Crash State:
  (produced_preparsed_scope_data_) != nullptr in preparser.cc
  v8::internal::PreParser::BuildParameterInitializationBlock
  v8::internal::ParserBase<v8::internal::PreParser>::ParseFunctionBody
  
Sanitizer: address (ASAN)

Regressed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_asan_debug&range=499534:499545
Fixed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_asan_debug&range=500577:500590

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=4653823351324672

See https://chromium.googlesource.com/chromium/src/+/master/testing/libfuzzer/reproducing.md for more information.

If you suspect that the result above is incorrect, try re-doing that job on the test case report page.

This bug has been closed for more than 14 weeks. Removing security view restrictions.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot