https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109394
kargl at gcc dot gnu.org changed: What |Removed |Added ---------------------------------------------------------------------------- Resolution|--- |INVALID Status|UNCONFIRMED |RESOLVED CC| |kargl at gcc dot gnu.org --- Comment #1 from kargl at gcc dot gnu.org --- Please see "13.10 List-directed formatting" in the Fortran standard. For the program you posted, a comma, blank, and semicolon are value separators. If you look at each token with do i = 1, mxtoks print *, trim(tokens(i)) end do you a b c a b c (1.0 2.0) 1 2 3 1.0 2.0 3.0 where the comma is the end of the character string "(1.0"