# Pastebin LSSo6eIY
Type check failed in assignment to %!heuristics; expected Array[Callable] but got Array[Callable].new()
  in method add-heuristic at /Users/fernando/ProblemSolver/Problem.pm6 (Problem) line 12
  in method constraint-vars at /Users/fernando/ProblemSolver/Problem.pm6 (Problem) line 76
  in block <unit> at -e line 1