}

	if check.firstErr == nil {
		check.firstErr = e
	}

	f := check.conf.Error
	if f == nil {
		panic(bailout{}) // record first error and exit
	}
	f(e)
}

const (
	invalidArg = "invalid argument: "
	invalidOp  = "invalid operation: "
)

// The poser interface is used to extract the position of type-checker errors.
type poser interface {
	Pos() syntax.Pos
}

	}

	if check.firstErr == nil {
		check.firstErr = e
	}

	f := check.conf.Error
	if f == nil {
		panic(bailout{}) // record first error and exit
	}
	f(e)
}

const (
	invalidArg = "invalid argument: "
	invalidOp  = "invalid operation: "
)

// The positioner interface is used to extract the position of type-checker errors.
type positioner interface {
	Pos() token.Pos
}