[Bug libgcc/107327] New: internal compiler error: in tsubst_pack_expansion, at cp/pt.c:12930

[Bug libgcc/107327] New: internal compiler error: in tsubst_pack_expansion, at cp/pt.c:12930

[kaploceh at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107327

            Bug ID: 107327
           Summary: internal compiler error: in tsubst_pack_expansion, at
                    cp/pt.c:12930
           Product: gcc
           Version: 10.2.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libgcc
          Assignee: unassigned at gcc dot gnu.org
          Reporter: kaploceh at gmail dot com
  Target Milestone: ---

I'm using GNU Make 4.3 and g++ Configured with:
/builddir/gcc-10.2.1_pre1/configure --build=x86_64-unknown-linux-gnu
--enable-gnu-unique-object --enable-vtable-verify --prefix=/usr
--mandir=/usr/share/man --infodir=/usr/share/info --libexecdir=/usr/lib64
--libdir=/usr/lib64 --enable-threads=posix --enable-__cxa_atexit
--disable-multilib --with-system-zlib --enable-shared --enable-lto
--enable-plugins --enable-linker-build-id --disable-werror --disable-nls
--enable-default-pie --enable-default-ssp --enable-checking=release
--disable-libstdcxx-pch --with-isl --with-linker-hash-style=gnu
--disable-sjlj-exceptions --disable-target-libiberty
--enable-languages=c,c++,objc,obj-c++,fortran,lto,go,ada
Thread model: posix

The compilation stops right with the message 

internal compiler error: in tsubst_pack_expansion, at cp/pt.c:12930

The closest string to match tsubst_pack_expansion I have on my system, is that
from the file cp-tree.h 

Perhaps a duplicate of bug 104390 ?

[Bug libgcc/107327] internal compiler error: in tsubst_pack_expansion, at cp/pt.c:12930

[kaploceh at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107327

--- Comment #1 from Carlos E <kaploceh at gmail dot com> ---
I haven't had any problems compiling it with Make before, usually it goes into:

 g++  -O3 -pedantic -std=c++2a -g -Wall -Wextra -Wno-unused-parameter
-Wno-sign-compare -Wno-address -Wno-init-list-lifetime -MD -MP -MF <file.d> -c 
-o <file.o> <file.cc>

with the variable CXXFLAGS += -pedantic -std=c++2a -g -Wall -Wextra
-Wno-unused-parameter -Wno-sign-compare -Wno-address from the Makefile


and so on

But this time around, it stops right with the message

 internal compiler error: in tsubst_pack_expansion, at cp/pt.c:12930

It finishes by telling me to 

Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.

while GNU Make says 

   Once you have a precise problem you can report it in one of two ways.
Either send electronic mail to:

         bug-make@gnu.org

or use our Web-based project management tool, at:

         http://savannah.gnu.org/projects/make/


So I'm reporting it here rather than over there.

[Bug c++/107327] internal compiler error: in tsubst_pack_expansion, at cp/pt.c:12930

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107327

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
   Last reconfirmed|                            |2022-10-20
          Component|libgcc                      |c++
             Status|UNCONFIRMED                 |WAITING

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Please attach preprocessed source and maybe try GCC 10.4 which contains many
bugfixes.

[Bug c++/107327] internal compiler error: in tsubst_pack_expansion, at cp/pt.c:12930

[kaploceh at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107327

--- Comment #3 from Carlos E <kaploceh at gmail dot com> ---
(In reply to Richard Biener from comment #2)
> Please attach preprocessed source and maybe try GCC 10.4 which contains many
> bugfixes.

I downloaded GCC 10.4 and it's compiling now. Will try it out. Thanks.

When you say to attach a preprocessed source, what would be the most accepted
command that I should be running which can reliably show whatever was
preprocessed?   

Is it g++ with an -E option? Are other options relevant? Or GNU Make -d ?

[Bug c++/107327] internal compiler error: in tsubst_pack_expansion, at cp/pt.c:12930

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107327

--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
> When you say to attach a preprocessed source, what would be the most
> accepted command that I should be running which can reliably show whatever
> was preprocessed?   

Just append -E to the existing command line arguments, that would be fine.

[Bug c++/107327] internal compiler error: in tsubst_pack_expansion, at cp/pt.c:12930

[kaploceh at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107327

--- Comment #5 from Carlos E <kaploceh at gmail dot com> ---
Created attachment 53743
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=53743&action=edit
internal compiler error: in tsubst_pack_expansion

[Bug c++/107327] internal compiler error: in tsubst_pack_expansion, at cp/pt.c:12930

[kaploceh at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107327

--- Comment #6 from Carlos E <kaploceh at gmail dot com> ---
(In reply to Martin Liška from comment #4)
> > When you say to attach a preprocessed source, what would be the most
> > accepted command that I should be running which can reliably show whatever
> > was preprocessed?   
> 
> Just append -E to the existing command line arguments, that would be fine.

done. I can also attach if necessary the whole file generated by GNU Make -d 

Still compiling gcc 10.4. It'll have to be postponed.

[Bug c++/107327] internal compiler error: in tsubst_pack_expansion, at cp/pt.c:12930

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107327

--- Comment #7 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Carlos E from comment #6)
> (In reply to Martin Liška from comment #4)
> > > When you say to attach a preprocessed source, what would be the most
> > > accepted command that I should be running which can reliably show whatever
> > > was preprocessed?   
> > 
> > Just append -E to the existing command line arguments, that would be fine.
> 
> done.

We need what was likely printed to stdout, or saved to a .o file.

See what's the pre-processed source file:
echo '#include <stdio.h>' | gcc -x c - -E

[Bug c++/107327] internal compiler error: in tsubst_pack_expansion, at cp/pt.c:12930

[kaploceh at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107327

--- Comment #8 from Carlos E <kaploceh at gmail dot com> ---
Created attachment 53762
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=53762&action=edit
preprocessed file

[Bug c++/107327] internal compiler error: in tsubst_pack_expansion, at cp/pt.c:12930

[kaploceh at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107327

--- Comment #9 from Carlos E <kaploceh at gmail dot com> ---
(In reply to Martin Liška from comment #7)
> (In reply to Carlos E from comment #6)
> > (In reply to Martin Liška from comment #4)
> > > > When you say to attach a preprocessed source, what would be the most
> > > > accepted command that I should be running which can reliably show whatever
> > > > was preprocessed?   
> > > 
> > > Just append -E to the existing command line arguments, that would be fine.
> > 
> > done.
> 
> We need what was likely printed to stdout, or saved to a .o file.
> 
> See what's the pre-processed source file:
> echo '#include <stdio.h>' | gcc -x c - -E

thank you Martin. 

It did compile as Richard suggested with 10.4 

Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/local/libexec/gcc/x86_64-pc-linux-gnu/10.4.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ./configure --with-mpc-lib= --disable-multilib
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 10.4.0 (GCC) 

the preprocessed file was after installing 10.4.
I can revert to 10.2

[Bug c++/107327] internal compiler error: in tsubst_pack_expansion, at cp/pt.c:12930

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107327

--- Comment #10 from Martin Liška <marxin at gcc dot gnu.org> ---
Can't reproduce the ICE with any GCC release I have:

gcc-bisect.py 'g++  -O3 -pedantic -std=c++2a -g -Wall -Wextra
-Wno-unused-parameter -Wno-sign-compare -Wno-address -Wno-init-list-lifetime  
pr107327.ii -c'
Releases
  10.1.0 (6e6e3f144a33ae50)(07 May 2020 10:50): [took: 0.02 s] result: OK
  10.2.0 (ee5c3db6c5b2c333)(23 Jul 2020 06:35): [took: 0.01 s] result: OK
  10.3.0 (f00b5710a30f22ef)(08 Apr 2021 11:56): [took: 0.01 s] result: OK
  10.4.0 (7ff47281ce4f3699)(28 Jun 2022 08:37): [took: 0.02 s] result: OK
  11.1.0 (50bc9185c2821350)(27 Apr 2021 11:39): [took: 0.02 s] result: OK
  11.2.0 (7ca388565af176bd)(28 Jul 2021 06:55): [took: 0.02 s] result: OK
  11.3.0 (2d280e7eafc086e9)(21 Apr 2022 07:59): [took: 0.02 s] result: OK
  12.1.0 (1ea978e3066ac565)(06 May 2022 07:07): [took: 0.02 s] result: OK
  12.2.0 (2ee5e4300186a92a)(19 Aug 2022 08:10): [took: 0.02 s] result: OK
  13.0 (6bfea64164c3f198)(24 Oct 2022 10:31): [took: 0.02 s] result: OK

[Bug c++/107327] internal compiler error: in tsubst_pack_expansion, at cp/pt.c:12930

[kaploceh at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107327

--- Comment #11 from Carlos E <kaploceh at gmail dot com> ---
Created attachment 53829
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=53829&action=edit
preprocessed file on 10.2

preprocessed with echo '#include <stdio.h>' | gcc -x c - -E

[Bug c++/107327] internal compiler error: in tsubst_pack_expansion, at cp/pt.c:12930

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107327

--- Comment #12 from Martin Liška <marxin at gcc dot gnu.org> ---
Can't reproduce :/