Some transform.Transformers are buggy and return ErrShortSrc even when they shouldn't (e.g. when atEOF = true). When passed such a transformer, transform.String() will allocate more and more memory until it runs out of memory and crashes. Due to a separate bug, UTF-16 decoder from the same library can behave in such way, so this code can be used to reproduce this bug:

package main

import "golang.org/x/text/encoding/unicode"

func main() {
	unicode.UTF16(unicode.BigEndian, unicode.UseBOM).NewDecoder().String(" ")
}