[Bug fortran/36132] New: [4.4 Regression] issue with _gfortran_internal_pack

["jv244 at cam dot ac dot uk" <gcc-bugzilla at gcc dot gnu dot org>]

the following testcase, derived from CP2K, illustrates an issue with
_gfortran_internal_pack. In CP2K this causes crashes such as:

Operating system error: Cannot allocate memory
Memory allocation failed

while this testcase shows under valgrind:

> gfortran -g -O0 test.f90

> valgrind --tool=memcheck ./a.out
==21339== Memcheck, a memory error detector.
==21339== Copyright (C) 2002-2007, and GNU GPL'd, by Julian Seward et al.
==21339== Using LibVEX rev 1732, a library for dynamic binary translation.
==21339== Copyright (C) 2004-2007, and GNU GPL'd, by OpenWorks LLP.
==21339== Using valgrind-3.2.3, a dynamic binary instrumentation framework.
==21339== Copyright (C) 2000-2007, and GNU GPL'd, by Julian Seward et al.
==21339== For more details, rerun with: -v
==21339==
==21339== Conditional jump or move depends on uninitialised value(s)
==21339==    at 0x4BF449B: _gfortran_internal_pack (in_pack_generic.c:56)
==21339==    by 0x4008BC: __m1_MOD_s2 (test.f90:12)
==21339==    by 0x400967: MAIN__ (test.f90:17)
==21339==    by 0x40099B: main (fmain.c:21)
==21339==
==21339== Conditional jump or move depends on uninitialised value(s)
==21339==    at 0x4008FA: __m1_MOD_s2 (test.f90:12)
==21339==    by 0x400967: MAIN__ (test.f90:17)
==21339==    by 0x40099B: main (fmain.c:21)


-- 
           Summary: [4.4 Regression] issue with _gfortran_internal_pack
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: jv244 at cam dot ac dot uk
OtherBugsDependingO 29975
             nThis:


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36132