http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55978
--- Comment #12 from janus at gcc dot gnu.org 2013-02-05 21:25:09 UTC --- Here is a further reduced test case, based on comment 1 and 3 (which are basically identical): program main implicit none integer, pointer :: y(:) y => null() call a4t2(y) contains subroutine a4t2(x) integer, intent(in) :: x(4) end subroutine end It yields valgrind errors with all gfortran versions I tried (trunk, 4.7, 4.6 and 4.3): ==5664== Conditional jump or move depends on uninitialised value(s) ==5664== at 0x4F25F05: _gfortran_internal_pack (in_pack_generic.c:53) ==5664== by 0x40076E: MAIN__ (in /home/jweil/GSoC/PRs/55978/a.out) ==5664== by 0x4007CA: main (in /home/jweil/GSoC/PRs/55978/a.out) So it seems this is not an actual regression?!? class_optional_2.f90 was introduced only in 4.8, and possibly r195125 only uncovered an existing bug (e.g. by adding a call to _gfortran_internal_pack).
