[Bug c++/78564] New: cp-demangle fails to decode Ul+auto/anon

[jengelh at inai dot de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78564

            Bug ID: 78564
           Summary: cp-demangle fails to decode Ul+auto/anon
           Product: gcc
           Version: 6.2.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: jengelh at inai dot de
  Target Milestone: ---

$ g++-6 -std=gnu++14 -c x.cpp
int main(void)
{
        struct NAMED {} f;
        struct {} g;
        struct {} h;
        [](auto &&){}(f);
        [](auto &&, auto &&){}(g, h);
}

{binutils 2.27}
$ nm -C x.o
0000000000000000 t _ZZ4mainENKUlOT_E_clIRZ4mainE5NAMEDEEDaS0_
0000000000000010 t _ZZ4mainENKUlOT_OT0_E0_clIRZ4mainEUt_RZ4mainEUt0_EEDaS0_S2_

$ gcc -v
Using built-in specs.
Reading specs from /usr/lib64/gcc/x86_64-suse-linux/6/defaults.spec
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib64/gcc/x86_64-suse-linux/6/lto-wrapper
Target: x86_64-suse-linux
Configured with: ../configure --prefix=/usr --infodir=/usr/share/info
--mandir=/usr/share/man --libdir=/usr/lib64 --libexecdir=/usr/lib64
--enable-languages=c,c++,objc,fortran,obj-c++,java,ada,go
--enable-offload-targets=hsa --enable-checking=release
--with-gxx-include-dir=/usr/include/c++/6 --enable-ssp --disable-libssp
--disable-libvtv --disable-libcc1 --enable-plugin
--with-bugurl=http://bugs.opensuse.org/ --with-pkgversion='SUSE Linux'
--disable-libgcj --with-slibdir=/lib64 --with-system-zlib --enable-__cxa_atexit
--enable-libstdcxx-allocator=new --disable-libstdcxx-pch
--enable-version-specific-runtime-libs --enable-linker-build-id
--enable-linux-futex --enable-gnu-indirect-function --program-suffix=-6
--without-system-libunwind --enable-multilib --with-arch-32=x86-64
--with-tune=generic --build=x86_64-suse-linux --host=x86_64-suse-linux
Thread model: posix
gcc version 6.2.1 20160830 [gcc-6-branch revision 239856] (SUSE Linux)