[Bug fortran/53521] [4.5/4.6/4.7/4.8 Regression] Zero-byte "memory leak" with zero-sized array constructor (valgrind warning)

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53521

--- Comment #4 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-05-30 
12:46:53 UTC ---
You say not doing free (0) leaks memory?  What OS is this on?  Note that
we fold such calls away:

    case BUILT_IN_FREE:
      if (integer_zerop (arg0))
        return build_empty_stmt (loc);