Re: Oh dear. I regret to inform you that commit 'RAII-fy make_cleanup_restore_current_thread & friends' might be unfortunate

[Pedro Alves <palves@redhat.com>]

On 05/04/2017 05:06 PM, gdb-buildbot@sergiodj.net wrote:
> g++  -g -O2   -I. -I../../binutils-gdb/gdb -I../../binutils-gdb/gdb/common -I../../binutils-gdb/gdb/config -DLOCALEDIR="\"/usr/local/share/locale\"" -DHAVE_CONFIG_H -I../../binutils-gdb/gdb/../include/opcode -I../../binutils-gdb/gdb/../opcodes/.. -I../../binutils-gdb/gdb/../readline/.. -I../../binutils-gdb/gdb/../zlib -I../bfd -I../../binutils-gdb/gdb/../bfd -I../../binutils-gdb/gdb/../include -I../libdecnumber -I../../binutils-gdb/gdb/../libdecnumber  -I../../binutils-gdb/gdb/gnulib/import -Ibuild-gnulib/import   -DTUI=1   -pthread -I/usr/include/guile/2.0 -I/usr/include/python2.7 -I/usr/include/python2.7 -Wall -Wpointer-arith -Wno-unused -Wunused-value -Wunused-function -Wno-switch -Wno-char-subscripts -Wempty-body -Wunused-but-set-parameter -Wunused-but-set-variable -Wno-sign-compare -Wno-narrowing -Wformat-nonliteral -Werror -c -o interps.o -MT interps.o -MMD -MP -MF .deps/interps.Tpo ../../binutils-gdb/gdb/interps.c
> In file included from ../../binutils-gdb/gdb/infrun.c:26:0:
> ../../binutils-gdb/gdb/inferior.h: In function void handle_vfork_child_exec_or_exit(int):
> ../../binutils-gdb/gdb/inferior.h:553:39: error: *((void*)(& maybe_restore_inferior)+40).scoped_restore_current_inferior::m_saved_inf may be used uninitialized in this function [-Werror=maybe-uninitialized]
>    { set_current_inferior (m_saved_inf); }
>                                        ^
> ../../binutils-gdb/gdb/infrun.c:940:6: note: *((void*)(& maybe_restore_inferior)+40).scoped_restore_current_inferior::m_saved_inf was declared here
>       maybe_restore_inferior;
>       ^~~~~~~~~~~~~~~~~~~~~~
> In file included from ../../binutils-gdb/gdb/inferior.h:46:0,
>                  from ../../binutils-gdb/gdb/infrun.c:26:
> ../../binutils-gdb/gdb/progspace.h:274:47: error: *((void*)(& maybe_restore_inferior)+32).scoped_restore_current_program_space::m_saved_pspace may be used uninitialized in this function [-Werror=maybe-uninitialized]
>    { set_current_program_space (m_saved_pspace); }
>                                                ^
> ../../binutils-gdb/gdb/infrun.c:940:6: note: *((void*)(& maybe_restore_inferior)+32).scoped_restore_current_program_space::m_saved_pspace was declared here
>       maybe_restore_inferior;
>       ^~~~~~~~~~~~~~~~~~~~~~

Fun, looks like gdb::optional related ...

Thanks,
Pedro Alves