GitLab

Follow the idiom for allowing -d=checkptr to recognize and verify
correctness.

Updates #22218.
Updates #34972.

Change-Id: Ib6001c6f0e6dc535a36bcfaa1ae48e29e0c737f8
Reviewed-on: https://go-review.googlesource.com/c/go/+/202580


Run-TryBot: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>