Ah, it reminds me
http://lists.squeakfoundation.org/pipermail/squeak-dev/2007-April/116179.html
http://lists.squeakfoundation.org/pipermail/squeak-dev/2007-May/116508.html

2009/4/16 Andrey Larionov <anlarionov at gmail.com>:
> Investigating reasons of fail FontTest tests i found bug in
> MultiCompositionScaner (or it maybe some related class). Looks like
> what Character value: 257 had a special meaning in squeak. If not use
> StrikeFont everything is well, but if you choose FreeType font the
> doing something
> (Character value: 257) asString asTextMorph openInWorld
> creates an endles loop in composer. It founds character falls in
> crossedX method (this character is stopCondition) and then remove
> character from composition and starts again.
>
>