Adding to Frédéric's comment #2 and Pierre's comment #5, I can confirm that this bug happens wherever the accentuated character occurs in the file's full path, i.e.:
/home/nael/testdir/testsubdir/téstfile.txt /home/nael/testdir/téstsubdir/testfile.txt /home/nael/téstdir/testsubdir/testfile.txt
cannot be opened from the Dash in Unity 2D 5.12.
Adding to Frédéric's comment #2 and Pierre's comment #5, I can confirm that this bug happens wherever the accentuated character occurs in the file's full path, i.e.:
/home/ nael/testdir/ testsubdir/ téstfile. txt nael/testdir/ téstsubdir/ testfile. txt nael/téstdir/ testsubdir/ testfile. txt
/home/
/home/
cannot be opened from the Dash in Unity 2D 5.12.