Working directory calculation is broken when in a subdirectory of submodule

[mateusz-holenko]

When tig is started from a subdirectory of a repository's submodule it is impossible to e.g., open the file in text editor (using e key) as it says that the file does not exist. Here is an example files tree:

repository_directory
+-> file1
+-> file2
+-+ submodule_folder
  +-> file3
  +-+ dir1
    +-> file4

When file4 is modified and tig is run from submodule_folder everything works fine. But when it is run from dir1 text editor cannot open it (as it does not exist).

After analyzing source code I managed to narrow the problem down to core.worktree and repo.cdup which seems to conflict and change current working directory twice. Quick fix of commenting out core.worktree works for me, but I assume it will brake support for repositories with multiple working trees.