[Bug c++/85128] New: Local scope type(def) falsely assumed to change meaning of outer scope type(def)

["steffen at sdaoden dot eu" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85128

            Bug ID: 85128
           Summary: Local scope type(def) falsely assumed to change
                    meaning of outer scope type(def)
           Product: gcc
           Version: 6.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: steffen at sdaoden dot eu
  Target Milestone: ---

Hi, my first post here.
So i have no idea, all i can say is what the subject says, that clang gets it
right, and here is the error message:

g++ -DNDEBUG -DOPTIMIZE -Wall -W -Wno-long-long -pedantic -fno-exceptions
-fno-rtti -DPIC -fpic -I./ -fomit-frame-pointer -O2 -c -o .obj/d2.o
src/smp/x_signal.cc
In file included from ./sf/sys/cp.h:30:0,
                 from ./src/x_posix.h:133,
                 from src/smp/x_signal.cc:46:
./sf/sys/coll/teacher.h:146:32: error: declaration of 'typedef class
SF::Sys::Coll::AutoToolbox<T> SF::Sys::Coll::TypeTraits<T>::AutoToolbox'
[-fpermissive]
  pub typedef AutoToolbox<Type> AutoToolbox;
                                ^~~~~~~~~~~
In file included from ./sf/sys/coll/teacher.h:29:0,
                 from ./sf/sys/cp.h:30,
                 from ./src/x_posix.h:133,
                 from src/smp/x_signal.cc:46:
./sf/sys/coll/forwards.h:61:25: error: changes meaning of 'AutoToolbox' from
'class SF::Sys::Coll::AutoToolbox<T>' [-fpermissive]
 template<class T> class AutoToolbox;
                         ^~~~~~~~~~~