path/filepath: return special error from EvalSymlinks

CL 155597 attempted to fix #29372. But it failed to make all new
test cases pass. Also CL 155597 broke some existing code
(see #29449 for details).

Make small adjustment to CL 155597 that fixes both #29372 and #29449.

Suggested by Ian.

Updates #29372
Fixes #29449

Change-Id: I9777a615514d3f152af5acb65fb1239e696607b6
Reviewed-on: https://go-review.googlesource.com/c/156398
Run-TryBot: Alex Brainman <alex.brainman@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
5 files changed
tree: 05f200532f0950ece15d871efea5cfb7927dc3c2
  1. .gitattributes
  2. .github/
  3. .gitignore
  4. AUTHORS
  5. CONTRIBUTING.md
  6. CONTRIBUTORS
  7. LICENSE
  8. PATENTS
  9. README.md
  10. api/
  11. doc/
  12. favicon.ico
  13. lib/
  14. misc/
  15. robots.txt
  16. src/
  17. test/
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