The bug is due to an unexpected opcode. To avoid similar issues in the future, we fallback to CheckContextExtensionSlowPath. This was the default behaviour before the CL (https://chromium-review.googlesource.com/c/v8/v8/+/1876051).

Bug: chromium:1020983
Change-Id: Ia7f0f2986ec0008d1128ad3856efbb5d9e52dfc6
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1899989
Commit-Queue: Victor Gomes <victorgomes@chromium.org>
Auto-Submit: Victor Gomes <victorgomes@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64794}