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Subject: [Bug fortran/99204] ICE in fold_read_from_constant_string, at
 fold-const.c:15441
Date: Mon, 22 Feb 2021 16:57:13 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D99204

G. Steinmetz <gscfq@t-online.de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |ice-on-invalid-code

--- Comment #1 from G. Steinmetz <gscfq@t-online.de> ---

Some cases with small numbers :

$ cat zz1.f90
program p
   character :: c =3D 'c'
   integer :: i =3D -1
   c =3D 'abc'(i:i)
   print *, c
end

$ cat zz2.f90
program p
   character :: c =3D 'c'
   integer :: i =3D -123
   c =3D 'abc'(i:i)
   print *, c
end

$ gfortran-11-20210221 zz1.f90 -O2 && ./a.out

$ gfortran-11-20210221 zz2.f90 -O2 && ./a.out
 c


---

The value at which the switchover from no-ICE to ICE occurs=20
depends on used options, and changes with gfortran versions=20
and environment, e.g.

$ cat za.f90   # no-ICE
program p
   character :: c
   integer :: i =3D -1800000
   c =3D 'abc'(i:i)
   print *, c
end

$ cat zb.f90   # ICE
program p
   character :: c
   integer :: i =3D -1900000
   c =3D 'abc'(i:i)
   print *, c
end=