[Bug c++/94946] New: [10/11 Regression] error: ‘template<class returnType> JSC::FunctionPtr::FunctionPtr(returnType (*)())’ cannot be overloaded since r10-7998-g5f1cd1da1a805c3d

[Bug c++/94946] New: [10/11 Regression] error: ‘template<class returnType> JSC::FunctionPtr::FunctionPtr(returnType (*)())’ cannot be overloaded since r10-7998-g5f1cd1da1a805c3d

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94946

            Bug ID: 94946
           Summary: [10/11 Regression] error: ‘template<class returnType>
                    JSC::FunctionPtr::FunctionPtr(returnType (*)())’
                    cannot be overloaded since r10-7998-g5f1cd1da1a805c3d
           Product: gcc
           Version: 10.0
            Status: UNCONFIRMED
          Keywords: needs-reduction
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: marxin at gcc dot gnu.org
                CC: jason at gcc dot gnu.org
  Target Milestone: ---

Created attachment 48445
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=48445&action=edit
Unreduced test-case

It's a recent regression on i586 target seen on libqt5-qtwebkit package:
$ g++ qt.ii -c -m32 -fmax-errors=1
^C
marxin@marxinbox:~/BIG/osc/openSUSE:Factory:Staging:N/libqt5-qtwebkit> export
PATH=/home/marxin/bin/gcc/bin/:/home/marxin/bin/cvise/usr/local/bin:$PATH &&
export LD_LIBRARY_PATH=/home/marxin/bin/gcc/lib64/:$LD_LIBRARY_PATH
marxin@marxinbox:~/BIG/osc/openSUSE:Factory:Staging:N/libqt5-qtwebkit> g++
qt.ii -c -m32 -fmax-errors=1
In file included from
/home/abuild/rpmbuild/BUILD/qtwebkit-5.212.0-alpha3/Source/JavaScriptCore/jit/JITStubRoutine.h:32,
                 from
/home/abuild/rpmbuild/BUILD/qtwebkit-5.212.0-alpha3/Source/JavaScriptCore/heap/JITStubRoutineSet.h:29,
                 from
/home/abuild/rpmbuild/BUILD/qtwebkit-5.212.0-alpha3/Source/JavaScriptCore/heap/Heap.h:33,
                 from
/home/abuild/rpmbuild/BUILD/qtwebkit-5.212.0-alpha3/Source/JavaScriptCore/heap/DeferGC.h:29,
                 from
/home/abuild/rpmbuild/BUILD/qtwebkit-5.212.0-alpha3/Source/JavaScriptCore/runtime/ConcurrentJITLock.h:29,
                 from
/home/abuild/rpmbuild/BUILD/qtwebkit-5.212.0-alpha3/Source/JavaScriptCore/bytecode/ArrayProfile.h:29,
                 from
/home/abuild/rpmbuild/BUILD/qtwebkit-5.212.0-alpha3/Source/JavaScriptCore/llint/LLIntOffsetsExtractor.cpp:28:
/home/abuild/rpmbuild/BUILD/qtwebkit-5.212.0-alpha3/Source/JavaScriptCore/assembler/MacroAssemblerCodeRef.h:184:5:
error: ‘template<class returnType> JSC::FunctionPtr::FunctionPtr(returnType
(*)())’ cannot be overloaded with ‘template<class returnType>
JSC::FunctionPtr::FunctionPtr(returnType (*)())’
In file included from
/home/abuild/rpmbuild/BUILD/qtwebkit-5.212.0-alpha3/Source/JavaScriptCore/jit/JITStubRoutine.h:32,
                 from
/home/abuild/rpmbuild/BUILD/qtwebkit-5.212.0-alpha3/Source/JavaScriptCore/heap/JITStubRoutineSet.h:29,
                 from
/home/abuild/rpmbuild/BUILD/qtwebkit-5.212.0-alpha3/Source/JavaScriptCore/heap/Heap.h:33,
                 from
/home/abuild/rpmbuild/BUILD/qtwebkit-5.212.0-alpha3/Source/JavaScriptCore/heap/DeferGC.h:29,
                 from
/home/abuild/rpmbuild/BUILD/qtwebkit-5.212.0-alpha3/Source/JavaScriptCore/runtime/ConcurrentJITLock.h:29,
                 from
/home/abuild/rpmbuild/BUILD/qtwebkit-5.212.0-alpha3/Source/JavaScriptCore/bytecode/ArrayProfile.h:29,
                 from
/home/abuild/rpmbuild/BUILD/qtwebkit-5.212.0-alpha3/Source/JavaScriptCore/llint/LLIntOffsetsExtractor.cpp:28:
/home/abuild/rpmbuild/BUILD/qtwebkit-5.212.0-alpha3/Source/JavaScriptCore/assembler/MacroAssemblerCodeRef.h:94:5:
note: previous declaration ‘template<class returnType>
JSC::FunctionPtr::FunctionPtr(returnType (*)())’
compilation terminated due to -fmax-errors=1.

I'm reducing that right now.

[Bug c++/94946] [10/11 Regression] error: ‘template<class returnType> JSC::FunctionPtr::FunctionPtr(returnType (*)())’ cannot be overloaded since r10-7998-g5f1cd1da1a805c3d

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94946

Martin Liška <marxin at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to work|                            |9.3.0
   Target Milestone|---                         |10.0
     Ever confirmed|0                           |1
   Last reconfirmed|                            |2020-05-04
             Status|UNCONFIRMED                 |NEW
      Known to fail|                            |10.0, 11.0

[Bug c++/94946] [10/11 Regression] error: ‘template<class returnType> JSC::FunctionPtr::FunctionPtr(returnType (*)())’ cannot be overloaded since r10-7998-g5f1cd1da1a805c3d

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94946

Martin Liška <marxin at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|needs-reduction             |rejects-valid

--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Reduced test-case:

$ cat qt.ii
class a {
  template <typename b> a(b());
  template <typename b> a(b(__attribute__((fastcall)) c)());
};

[Bug c++/94946] [10/11 Regression] error: ‘template<class returnType> JSC::FunctionPtr::FunctionPtr(returnType (*)())’ cannot be overloaded since r10-7998-g5f1cd1da1a805c3d

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94946

Martin Liška <marxin at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jakub at gcc dot gnu.org,
                   |                            |mpolacek at gcc dot gnu.org,
                   |                            |nathan at gcc dot gnu.org

--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Can please anybody take a look before we'll make 10.1 release?

[Bug c++/94946] [10/11 Regression] error: ‘template<class returnType> JSC::FunctionPtr::FunctionPtr(returnType (*)())’ cannot be overloaded since r10-7998-g5f1cd1da1a805c3d

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94946

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Isn't 9 branch affected too?  The r10-7998 change has been backported.

[Bug c++/94946] [9/10/11 Regression] error: ‘template<class returnType> JSC::FunctionPtr::FunctionPtr(returnType (*)())’ cannot be overloaded since r10-7998-g5f1cd1da1a805c3d

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94946

Marek Polacek <mpolacek at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[10/11 Regression] error:   |[9/10/11 Regression] error:
                   |‘template<class returnType> |‘template<class returnType>
                   |JSC::FunctionPtr::FunctionP |JSC::FunctionPtr::FunctionP
                   |tr(returnType (*)())’       |tr(returnType (*)())’
                   |cannot be overloaded since  |cannot be overloaded since
                   |r10-7998-g5f1cd1da1a805c3d  |r10-7998-g5f1cd1da1a805c3d

--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #3)
> Isn't 9 branch affected too?  The r10-7998 change has been backported.

It is.

[Bug c++/94946] [9/10/11 Regression] error: ‘template<class returnType> JSC::FunctionPtr::FunctionPtr(returnType (*)())’ cannot be overloaded since r10-7998-g5f1cd1da1a805c3d

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94946

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|10.0                        |9.4

[Bug c++/94946] [9/10/11 Regression] error: ‘template<class returnType> JSC::FunctionPtr::FunctionPtr(returnType (*)())’ cannot be overloaded since r10-7998-g5f1cd1da1a805c3d

[nathan at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94946

Nathan Sidwell <nathan at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #5 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Patch pushed to 9, 10 & master

[Bug c++/94946] [9/10/11 Regression] error: ‘template<class returnType> JSC::FunctionPtr::FunctionPtr(returnType (*)())’ cannot be overloaded since r10-7998-g5f1cd1da1a805c3d

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94946

--- Comment #6 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jakub Jelinek <jakub@gcc.gnu.org>:

https://gcc.gnu.org/g:1d865b29abc99122e9faf109fe8faf2d6616a073

commit r11-164-g1d865b29abc99122e9faf109fe8faf2d6616a073
Author: Jakub Jelinek <jakub@redhat.com>
Date:   Thu May 7 14:56:51 2020 +0200

    testsuite: Improve g++.dg/ext/attr-parm-1.C testcase [PR94946]

    The testcase in the current form doesn't FAIL without the patch on
    x86_64-linux unless also testing with -m32; as that the 64-bit testing
    on that target is probably way more common, and we can use also attributes
    that FAIL without the patch with -m64, the following patch adjusts the
    test, so that it FAILs without the patch for both -m64 and -m32 (but not
    -mx32) and PASSes with the patch.

    2020-05-07  Jakub Jelinek  <jakub@redhat.com>

            PR c++/94946
            * g++.dg/ext/attr-parm-1.C: Enable the test also for lp64 x86, use
            sysv_abi and ms_abi attributes in that case instead of fastcall and
            no attribute.

[Bug c++/94946] [9/10/11 Regression] error: ‘template<class returnType> JSC::FunctionPtr::FunctionPtr(returnType (*)())’ cannot be overloaded since r10-7998-g5f1cd1da1a805c3d

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94946

--- Comment #7 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-10 branch has been updated by Jakub Jelinek
<jakub@gcc.gnu.org>:

https://gcc.gnu.org/g:dd38686d9c810cecbaa80bb82ed91caaa58ad635

commit r10-8117-gdd38686d9c810cecbaa80bb82ed91caaa58ad635
Author: Jakub Jelinek <jakub@redhat.com>
Date:   Thu May 7 14:56:51 2020 +0200

    testsuite: Improve g++.dg/ext/attr-parm-1.C testcase [PR94946]

    The testcase in the current form doesn't FAIL without the patch on
    x86_64-linux unless also testing with -m32; as that the 64-bit testing
    on that target is probably way more common, and we can use also attributes
    that FAIL without the patch with -m64, the following patch adjusts the
    test, so that it FAILs without the patch for both -m64 and -m32 (but not
    -mx32) and PASSes with the patch.

    2020-05-07  Jakub Jelinek  <jakub@redhat.com>

            PR c++/94946
            * g++.dg/ext/attr-parm-1.C: Enable the test also for lp64 x86, use
            sysv_abi and ms_abi attributes in that case instead of fastcall and
            no attribute.

[Bug c++/94946] [9/10/11 Regression] error: ‘template<class returnType> JSC::FunctionPtr::FunctionPtr(returnType (*)())’ cannot be overloaded since r10-7998-g5f1cd1da1a805c3d

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94946

--- Comment #8 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-9 branch has been updated by Jakub Jelinek
<jakub@gcc.gnu.org>:

https://gcc.gnu.org/g:fadd59262921825b135b8e018ac8510e97dee92a

commit r9-8577-gfadd59262921825b135b8e018ac8510e97dee92a
Author: Jakub Jelinek <jakub@redhat.com>
Date:   Thu May 7 14:56:51 2020 +0200

    testsuite: Improve g++.dg/ext/attr-parm-1.C testcase [PR94946]

    The testcase in the current form doesn't FAIL without the patch on
    x86_64-linux unless also testing with -m32; as that the 64-bit testing
    on that target is probably way more common, and we can use also attributes
    that FAIL without the patch with -m64, the following patch adjusts the
    test, so that it FAILs without the patch for both -m64 and -m32 (but not
    -mx32) and PASSes with the patch.

    2020-05-07  Jakub Jelinek  <jakub@redhat.com>

            PR c++/94946
            * g++.dg/ext/attr-parm-1.C: Enable the test also for lp64 x86, use
            sysv_abi and ms_abi attributes in that case instead of fastcall and
            no attribute.