Committed fix for pr124208

[Jerry D]

Thanks to Christopher.

Fairly simple fix.
Jerry

commit 97965bdc1ed36f97a6e2ec2ee7bc208dd05d8c18 (HEAD -> master, origin/master, 
origin/HEAD)
Author: Christopher Albert <alb...@tugraz.at>
Date:   Mon Feb 23 22:42:44 2026 +0100

    fortran: Fix iterator counting in nested block scopes [PR fortran/124208]

    Count FORALL/DO CONCURRENT iterators in EXEC_BLOCK namespace code chains
    while sizing VAR_EXPR in gfc_resolve_forall.

    This prevents undersized allocation and an ICE for nested FORALL/DO
    CONCURRENT inside ASSOCIATE/BLOCK constructs.

            PR fortran/124208

    gcc/fortran/ChangeLog:

            * resolve.cc (gfc_max_forall_iterators_in_chain): Count
            iterators in EXEC_BLOCK namespaces.

    gcc/testsuite/ChangeLog:

            * gfortran.dg/pr124208.f90: New test.

    Signed-off-by: Christopher Albert <alb...@tugraz.at>