http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60322
--- Comment #2 from janus at gcc dot gnu.org --- For both cases (TYPE and CLASS), the temporary that is created (to be passed to copyFromArray) has an lbound of zero (as shown by -fdump-tree-original): atmp.6.dim[0].stride = 1; atmp.6.dim[0].lbound = 0; atmp.6.dim[0].ubound = 0; For the TYPE case, additional code (and another temporary) is generated inside of copyFromArray, which resets the bounds: parm.6.dim[0].lbound = 1; parm.6.dim[0].ubound = D.2342; So we just have to make sure that this additional code is also generated for the CLASS case. Or, why not directly start with lbound=1 for the original temporary?