Error with directory symlink: Unexpected file kind "S_DIR"

[emillon]

Hi,

When a directory target contains a directory symlink (symlink whose target is a directory), the following error happens:

  Error: Error trying to read targets after a rule was run:
  - d/b: Unexpected file kind "S_DIR" (directory)
  [1]

This can be found when building ocamlbuild through pkg rules, since its source tree contains such symlinks.

I bisected that to b1c339b in #9407 (@rleshchinskiy).

[emillon]

Repro in #9874.