[Bug fortran/58007] [OOP] ICE in free_pi_tree(): Unresolved fixup - resolve_fixups does not fixup component of __class_bsr_Bsr_matrix

["townsend at astro dot wisc.edu" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58007

Rich Townsend <townsend at astro dot wisc.edu> changed:

           What    |Removed                     |Added
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                 CC|                            |townsend at astro dot wisc.edu

--- Comment #9 from Rich Townsend <townsend at astro dot wisc.edu> ---
(In reply to Mikael Morin from comment #8)
> Created attachment 30656 [details]
> tentative hack
> 
> For some reason this patch fixes the internal error on comment #6, but not
> on comment #4.

I can conform that this patch works to fix the bug on trunk (rev. 202487)
running on OS X 10.7. Without the patch, the test case in #6 fails with the
usual unresolved fixup issue.

However, *with* Mikael's patch I'm no longer able to build the HDF5 libraries
(1.8.10-patch1). During compilation of the Fortran API, I get the following:

tH5L_F03.f90:125.6:

  USE liter_cb_mod
      1
Internal Error at (1):
free_pi_tree(): Unresolved fixup
make[2]: *** [tH5L_F03.o] Error 1

I configured thusly:

./configure --build=x86_64-apple-darwin11.4.2 --prefix=/Applications/mesasdk
--enable-fortran --enable-fortran2003

This has become a showstopper for me: I need Mikael's patch to fix unresolved
fixup issues with my own codes (with a similar trigger to the examples given
above), but I also need the HDF5 libraries for the codes. Unresolved fixups are
the #1 bug I've encountered with gfortran over the past year, yet due to their
very temperamental nature they're difficult to report and thus difficult to
make the gfortran developers sit up and take notice of.

So, I'd like to make a earnest plea to the devs: please get to the bottom of
this! I'm happy to work closely with you in coming up with test cases that
trigger the bug. But this really needs to be fixed; it basically kills gfortran
as a viable compiler.