[Bug c++/106341] New: Template argument deduction of template value parameter crashes compiler

[Bug c++/106341] New: Template argument deduction of template value parameter crashes compiler

[lissheidr.spam at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106341

            Bug ID: 106341
           Summary: Template argument deduction of template value
                    parameter crashes compiler
           Product: gcc
           Version: 10.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: lissheidr.spam at gmail dot com
  Target Milestone: ---

Created attachment 53313
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=53313&action=edit
small example that reproduces the bug

Description:
Compiler segfaults when trying to deduce the template arguments of a template
value
parameter with sufficiently complex nesting.

OS: Ubuntu 22.10
Failing compiler versions: 9.5.0-1ubuntu1, 10.4.0-1ubuntu1, 11.1 (x86_64 via
godbolt.org)
Working compiler versions: 11.3.0-4ubuntu1 and up don't seem to segfault
Compiler arguments: -std=c++2a

g++-10 -v:
Using built-in specs.
COLLECT_GCC=g++-10
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/10/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu 10.4.0-1ubuntu1'
--with-bugurl=file:///usr/share/doc/gcc-10/README.Bugs
--enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++,m2 --prefix=/usr
--with-gcc-major-version-only --program-suffix=-10
--program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --enable-bootstrap --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-plugin --enable-default-pie --with-system-zlib
--enable-libphobos-checking=release --with-target-system-zlib=auto
--enable-objc-gc=auto --enable-multiarch --disable-werror --with-arch-32=i686
--with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib
--with-tune=generic --enable-offload-targets=hsa --without-cuda-driver
--enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu
--target=x86_64-linux-gnu --with-build-config=bootstrap-lto-lean
--enable-link-mutex
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 10.4.0 (Ubuntu 10.4.0-1ubuntu1)

[Bug c++/106341] Template argument deduction of template value parameter crashes compiler

[lissheidr.spam at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106341

--- Comment #1 from Liss Heidrich <lissheidr.spam at gmail dot com> ---
Created attachment 53314
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=53314&action=edit
output of gcc-10 when compiling segfault.cpp

[Bug c++/106341] Template argument deduction of template value parameter crashes compiler

[lissheidr.spam at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106341

--- Comment #2 from Liss Heidrich <lissheidr.spam at gmail dot com> ---
Created attachment 53315
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=53315&action=edit
output of gcc-11 when compiling segfault.cpp (from godbolt.org)

[Bug c++/106341] Template argument deduction of template value parameter crashes compiler

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106341

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |marxin at gcc dot gnu.org
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |DUPLICATE

--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed with r12-100-gbcd77b7b9f35bd5b.

*** This bug has been marked as a duplicate of bug 93383 ***