cmd/go: fix error stacks when there are scanner errors

After golang.org/cl/228784 setLoadPackageDataError tries to decide whether an
error is caused by an imported package or an importing package by examining the
error itself to decide. Ideally, the errors themselves would belong to a
specific interface or some other property to make it unambiguous that they
were import errors. Since they don't, setLoadPackageDataError just checked
for nogoerrors and classified all other errors as import errors. But
it missed scanner errors which are also "caused" by the imported
package.

Fixes #40544

Change-Id: I39159bfdc286bee73697decd07b8aa9451f2db06
Reviewed-on: https://go-review.googlesource.com/c/go/+/246717
Run-TryBot: Michael Matloob <matloob@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
2 files changed
tree: 191fb7f22875be7e127baf6cb871fba64f6b1e20
  1. .github/
  2. api/
  3. doc/
  4. lib/
  5. misc/
  6. src/
  7. test/
  8. .gitattributes
  9. .gitignore
  10. AUTHORS
  11. CONTRIBUTING.md
  12. CONTRIBUTORS
  13. favicon.ico
  14. LICENSE
  15. PATENTS
  16. README.md
  17. robots.txt
  18. SECURITY.md
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