Internal error, please report upstream including the contents of _build/log.
Description:
  ("Dune_lang.Atom.of_string got invalid atom", { atom = "\195\168" })
Raised at Stdune__Code_error.raise in file "stdune__Code_error.ml", line 11,
  characters 30-62
Called from Dune_sexp__Versioned_file.Make.Lang.parse in file
  "dune_sexp__Versioned_file.ml", line 65, characters 26-44
Called from Dune_sexp__Versioned_file.Make.parse_lang_exn in file
  "dune_sexp__Versioned_file.ml", line 92, characters 15-36
Called from Dune_sexp__Versioned_file.Make.parse_contents in file
  "dune_sexp__Versioned_file.ml" (inlined), line 104, characters 14-31
Called from Dune_lang__Dune_project.load_dune_project in file
  "dune_lang__Dune_project.ml", line 1031, characters 2-77
Called from Fiber__Scheduler.exec in file "fiber__Scheduler.ml", line 77,
  characters 8-11
-> required by ("<unnamed>", ())
-> required by ("dune_load", ())
-> required by ("Super_context.all", ())
-> required by ("toplevel", ())

I must not crash.  Uncertainty is the mind-killer. Exceptions are the
little-death that brings total obliteration.  I will fully express my cases. 
Execution will pass over me and through me.  And when it has gone past, I
will unwind the stack along its path.  Where the cases are handled there will
be nothing.  Only I will remain.