Hi Steve,

> resolve_ref() calls resolve_substring() but failed to check
> its return value.  This patch does the check.

Looks pretty obvious. Please commit.

Thanks for the patch,
Janus



> 2011-10-15  Steven G. Kargl  <ka...@gcc.gcu.org>
>
>        * resolve.c (resolve_ref): Check return value of resolve_substring().
>
>
> 2011-10-15  Steven G. Kargl  <ka...@gcc.gcu.org>
>
>        * gfortran.dg/substring_integer_index.f90: New test.
>

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