[Bug fortran/51529] [OOP] gfortran.dg/class_to_type_1.f03 is miscompiled: Uninitialized variable used

["paul.richard.thomas at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51529

--- Comment #3 from paul.richard.thomas at gmail dot com <paul.richard.thomas at gmail dot com> 2011-12-14 08:55:08 UTC ---
Dear Tobias,

> However, I do now understand why one needs for SOURCE= to memset the source to
> NULL - at least as long _copy not only copies the data but also frees it. The
> latter could be also left to _free. - Actually, I am in favour of separating
> _copy and _free. As this issue shows, there are cases where one does not want
> to combine them, leading to work around actions (memset). I think only for
> polymorphic assignment, one needs _free + _copy, for allocate with SOURCE= a
> _copy should be enough.

The memset came about for similar reasons with class objects with
allocatable components.  I had missed this wrinkle with the testcase.
My inclination is to restire the memset and keep the PR open.

I am am trying to clear up some issues of functionality, starting with
the failure of a%disp() to scalarize properly in class_array_3.f03.
Then I have mind to understand the failure of vector indexing in
gfc_trans_call and finally to deal with class array components and
class array subreferences.  After the tidy up :-)

Cheers

Paul