[Bug debug/96997] [10/11 Regression] step over in gdb always stops in basic_string(const _CharT* __s, const _Alloc& __a = _Alloc())

[vries at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96997

--- Comment #3 from Tom de Vries <vries at gcc dot gnu.org> ---
-fdump-tree-all-lineno with gcc-9:
...
main ()
{
  struct string D.36200;
  struct allocator D.36199;
  struct string D.36242;
  struct allocator D.36241;
  int D.39843;

  [test.c:7:27] std::allocator<char>::allocator ([test.c:7:27] &D.36199);
  [test.c:7:19] try
    {
      try
        {
          [test.c:7:27] std::__cxx11::basic_string<char>::basic_string
([test.c:7:27] &D.36200, [test.c:7:27] "str1", &D.36199);
          try
            {
              try
                {
                  [test.c:7:40] std::operator<< <char, std::char_traits<char>,
std::allocator<char> > ([test.c:7:40] &cout, [test.c:7:27] &D.36200);
                }
              finally
                {
                  [test.c:7:27] std::__cxx11::basic_string<char>::~basic_string
([test.c:7:27] &D.36200);
                }
            }
          finally
            {
              [test.c:7:27] D.36200 = {CLOBBER};
            }
        }
      finally
        {
          [test.c:7:27] std::allocator<char>::~allocator ([test.c:7:27]
&D.36199);
        }
    }
  finally
    {
      [test.c:7:27] D.36199 = {CLOBBER};
    }
  [test.c:8:27] std::allocator<char>::allocator ([test.c:8:27] &D.36241);
  [test.c:8:19] try
    {
      try
        {
          [test.c:8:27] std::__cxx11::basic_string<char>::basic_string
([test.c:8:27] &D.36242, [test.c:8:27] "str2", &D.36241);
          try
            {
              try
                {
                  [test.c:8:40] std::operator<< <char, std::char_traits<char>,
std::allocator<char> > ([test.c:8:40] &cout, [test.c:8:27] &D.36242);
                }
              finally
                {
                  [test.c:8:27] std::__cxx11::basic_string<char>::~basic_string
([test.c:8:27] &D.36242);
                }
            }
          finally
            {
              [test.c:8:27] D.36242 = {CLOBBER};
            }
        }
      finally
        {
          [test.c:8:27] std::allocator<char>::~allocator ([test.c:8:27]
&D.36241);
        }
    }
  finally
    {
      [test.c:8:27] D.36241 = {CLOBBER};
    }
  [test.c:9:16] D.39843 = 0;
  [test.c:9:16] return D.39843;
  [test.c:10:1] D.39843 = 0;
  [test.c:10:1] return D.39843;
}
...