Error in multiple validators return a gibberish error

[gilles-crealp]

Describe the bug
Error in multiple validators return a gibberish error.

To Reproduce

program
  .argument('<test1>', '', { validator (value) { throw new Error('error 1') } })
  .argument('<test2>', '', { validator (value) { throw new Error('error 2') } })

program.run()

Expected behavior
Must return a list of validators errors.

Actual behavior
Return a gibberish error (with too much code to be understandable).

Environment informations

• OS: Windows
• OS version: 10
• Shell: cmd
• Caporal version: 2.0.2