[Boost-users] [qi] parser stocks inside an endless loop

Hello, the attached example will stock inside an endless loop if I use /*loop*/ Variable = *char_("a-zA-Z_0-9")>> ... but works if I use /*works*/ Variable = &char_("a-zA-Z")>> *char_("a-zA-Z_0-9")>> ... or /*works also*/ Variable = +char_("a-zA-Z_0-9")>> ... . Why does it happen? And how can I prevent this behaviour? Best regards