Wrong module for "go to definition"

[fotonmoton]

Go to definition sends to the wrong line in module.

To reproduce:

1. Open .ml file with external modules in use
2. Ctrl + click on functor/function/etc

Expected behavior: Editor opens right module with highlighted definition that was previously selected

Actual behavior: Editor opens wrong module and points to wrong line

Env:
OCaml: The OCaml toplevel, version 4.08.0
Dune: 1.10.0
Merlin: 3.3.1

Repo for reproduction.

[fotonmoton]

Can reproduce only for definitions in first part of code in test repo, before open Base.

[fotonmoton]

Actually "go to definition" on functions from Base.Map sends editor to standard Stdlib.Map functions.

[fotonmoton]

Sorry, I saw Xavier Leroy, project Cristal and think it was map.ml from standard library. When I try to "go to definition" editor always jumps to map.ml from Base package, that's why when I select definitions above open Base in test repo I get wrong lines and definitions after works fine.

So, I think, open Base somehow confuses Merlin/VScode plugin and definitions with same names but from different modules point to same place.