cmd/compile: improve issue62407_test
The original issue62407_test also passes with versions prior to 1.23.
The improvement makes it fail with versions prior to 1.23.
Change-Id: I94bfb9d1ac695c8e07997d7029fc2101535e14f8
GitHub-Last-Rev:
44be2a610a1a79d04dc3d228af2b313200f4d900
GitHub-Pull-Request: golang/go#70938
Reviewed-on: https://go-review.googlesource.com/c/go/+/638036
Reviewed-by: Junyang Shao <shaojunyang@google.com>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Keith Randall <khr@google.com>
Auto-Submit: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>