I was attempting to use the exported gin.Errortype in func (c *Context) Error(err error) *Error but it fails on compilation.

func someFunc(c *gin.Context) {
  if u, err := SomeOp(); err != nil {
    c.Error(gin.Error{err, gin.ErrorTypePublic, c.Request.URL.String()})
  }
}

Here's the compilation error :
cannot use gin.Error literal (type gin.Error) as type error in argument to c.Error: gin.Error does not implement error (Error method has pointer receiver)

If seems like the inteface was improperly implemented here as the reviecer type should not have be an *Error.

This should fix it.

// Implements the error interface
func (msg Error) Error() string {
    return msg.Err.Error()
}