This issue was fixed by earlier improvements to error handling when
loading modules.

Fixes #34829

Change-Id: I4cf4e182a7381f8b5c359179d90bd02491ea7911
Reviewed-on: https://go-review.googlesource.com/c/go/+/209037
Run-TryBot: Jay Conrod <jayconrod@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>