cmd/go/internal/modload: only check root-promotion during tidy for lazy modules

In a lazy module, it is important that tidyRoots does not add any new
roots because the dependencies of non-roots are pruned out.

In an eager module, that property is not important (and does not hold
in general) because no dependencies are ever pruned out.

Fixes #45952

Change-Id: I5c95b5696b7112b9219e38af04e0dece7fb6e202
Trust: Bryan C. Mills <>
Run-TryBot: Bryan C. Mills <>
TryBot-Result: Go Bot <>
Reviewed-by: Jay Conrod <>
2 files changed
tree: e5b8b47fd14a2cbb4cd61ccaf5711b0abbe071f6
  1. .gitattributes
  2. .github/
  3. .gitignore
  11. api/
  12. codereview.cfg
  13. doc/
  14. lib/
  15. misc/
  16. src/
  17. test/

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