https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123943
--- Comment #11 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Harald Anlauf <[email protected]>: https://gcc.gnu.org/g:edced0fe1e28a37c75b4e2c80a2a12db93d5002c commit r16-7513-gedced0fe1e28a37c75b4e2c80a2a12db93d5002c Author: Christopher Albert <[email protected]> Date: Thu Feb 12 00:06:13 2026 +0100 fortran: Fix DO CONCURRENT nested-in-block iterator counting [PR123943] Fix iterator-depth pre-counting in gfc_resolve_forall for nested DO CONCURRENT/FORALL constructs inside block arms (e.g. IF/ELSE, SELECT CASE). The previous logic only scanned a flat next-chain, which could undercount and trigger an ICE assertion. Add a regression test based on a reduced testcase from Harald Anlauf. Adjust wording in one comment to avoid GNU-style checker complaints. PR fortran/123943 gcc/fortran/ChangeLog: * resolve.cc (gfc_max_forall_iterators_in_chain): New helper function for factorization of iterator-depth counting. (gfc_count_forall_iterators): Use it. gcc/testsuite/ChangeLog: * gfortran.dg/pr123943.f90: New test. Co-authored-by: Harald Anlauf <[email protected]> Signed-off-by: Christopher Albert <[email protected]>
