https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67779
--- Comment #5 from Dominique d'Humieres <dominiq at lps dot ens.fr> --- Apparently there is a nasty bug somewhere: if I sort 'String = 2 ' 'String = 9 ' 'String = 8 ' 'String = 7 ' 'String = 6 ' 'String = 5 ' 'String = 4 ' 'String = 3 ' 'String = 10 ' 'String = 1 ' I get String = 2 String = 1 String = 10 String = 3 String = 4 String = 5 String = 6 String = 7 String = 8 String = 9