The following is illegal (only digits or a character constant can follow STOP):
$> cat stop.f90 STOP "a" // "constant" END $> gfortran-svn stop.f90 && ./a.out STOP aconstant gcc version 4.4.0 20090324 (experimental) (GCC) -- Summary: concat-op not allowed in STOP Product: gcc Version: 4.4.0 Status: UNCONFIRMED Keywords: diagnostic Severity: normal Priority: P3 Component: fortran AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: dfranke at gcc dot gnu dot org http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39555