Steps to Reproduce

• Create one content type with a textline fieldtype, where:
  Maximum length = 4
  Default Value = 12345
• Save the content type - The content type is saved without any warning or error

The consequences:

• now create one object of previous content type - the default value is pre-filled with "12345"
• Without changing anything, try to publish the object - an error occur

Aditional note: If after, we edit the created content type, try to publish it, then the validation is performed.