------- Comment #2 from jvdelisle at gcc dot gnu dot org 2007-08-31 19:47 ------- gfortran does catch these at run time.
Also, the last case, read ('f3.3'), a, does give a legitimate error: read ('f3.3'), a 1 Error: UNIT specification at (1) must be an INTEGER expression or a CHARACTER variable. See PR28397. I think this is a near duplicate. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33269