[Bug c++/78770] New: error: 'bar' was not declared in this scope. note: suggested alternative: 'bar'

[safinaskar at mail dot ru]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78770

            Bug ID: 78770
           Summary: error: 'bar' was not declared in this scope. note:
                    suggested alternative: 'bar'
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: safinaskar at mail dot ru
  Target Milestone: ---

Consider this code:

struct foo
{
  friend void
  bar (void);

  void baz (void)
  {
    bar ();
  }
};

void
bar (void)
{
}

g++ gives very strange "suggestion":

gcrash.cpp: In member function 'void foo::baz()':
gcrash.cpp:8:5: error: 'bar' was not declared in this scope
     bar ();
     ^~~
gcrash.cpp:8:5: note: suggested alternative: 'bar'
     bar ();
     ^~~
     bar

Error seems to be legit. Problem is in suggestion. g++ suggests to replace
"bar" with "bar". (???)

Command line:
/usr/lib/gcc-snapshot/bin/g++ -std=c++1z -fdiagnostics-color=always -c -o
/dev/null gcrash.cpp

debian gnu/linux stretch amd64 (x86_64). debian package gcc-snapshot
20161124-2. gcc -v:

Using built-in specs.
COLLECT_GCC=/usr/lib/gcc-snapshot/bin/gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc-snapshot/libexec/gcc/x86_64-linux-gnu/7.0.0/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Debian 20161124-2'
--with-bugurl=file:///usr/share/doc/gcc-snapshot/README.Bugs
--enable-languages=c,ada,c++,go,fortran,objc,obj-c++
--prefix=/usr/lib/gcc-snapshot --program-prefix= --enable-shared
--enable-linker-build-id --disable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin --with-system-zlib
--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-checking=yes --build=x86_64-linux-gnu
--host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 7.0.0 20161124 (experimental) [trunk revision 242836] (Debian
20161124-2)