[Bug fortran/70068] ICE: out of memory on involving empty substring

[tkoenig at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70068

--- Comment #4 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Author: tkoenig
Date: Sat Mar 24 17:37:21 2018
New Revision: 258835

URL: https://gcc.gnu.org/viewcvs?rev=258835&root=gcc&view=rev
Log:
2018-03-24  Thomas Koenig  <tkoenig@gcc.gnu.org>

        PR fortran/70068
        * expr.c (find_substring_ref): Change types of start, end
        and length variables to gfc_charlen_t. Set length to zero
        for empty substring.

2018-03-24  Thomas Koenig  <tkoenig@gcc.gnu.org>

        PR fortran/70068
        * gfortran.dg/substr_7.f90: New test.


Added:
    trunk/gcc/testsuite/gfortran.dg/substr_7.f90
Modified:
    trunk/gcc/fortran/ChangeLog
    trunk/gcc/fortran/expr.c
    trunk/gcc/testsuite/ChangeLog