[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 #4 from Tom de Vries <vries at gcc dot gnu.org> ---
-fdump-tree-all-lineno with gcc-10:
...
main ()
{
  struct string D.37010;
  struct allocator D.37009;
  struct string D.37052;
  struct allocator D.37051;
  int D.40670;

  [test.c:7:40] std::allocator<char>::allocator ([test.c:7:40] &D.37009);
  [test.c:7:19] try
    {
      try
        {
          [test.c:7:40] std::__cxx11::basic_string<char>::basic_string
([test.c:7:40] &D.37010
, [test.c:7:40] "str1", [/usr/include/c++/10/bits/basic_string.h:525:59]
&D.37009);
          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.37010);
                }
              finally
                {
                  [test.c:7:27] std::__cxx11::basic_string<char>::~basic_string
([test.c:7:27]
 &D.37010);
                }
            }
          finally
            {
              [test.c:7:27] D.37010 = {CLOBBER};
            }
        }
      finally
        {
          [/usr/include/c++/10/bits/basic_string.h:525:59]
std::allocator<char>::~allocator ([
/usr/include/c++/10/bits/basic_string.h:525:59] &D.37009);
        }
    }
  finally
    {
      [/usr/include/c++/10/bits/basic_string.h:525:59] D.37009 = {CLOBBER};
    }
  [test.c:8:40] std::allocator<char>::allocator ([test.c:8:40] &D.37051);
  [test.c:8:19] try
    {
      try
        {
          [test.c:8:40] std::__cxx11::basic_string<char>::basic_string
([test.c:8:40] &D.37052
, [test.c:8:40] "str2", [/usr/include/c++/10/bits/basic_string.h:525:59]
&D.37051);
          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.37052);
                }
              finally
                {
                  [test.c:8:27] std::__cxx11::basic_string<char>::~basic_string
([test.c:8:27]
 &D.37052);
                }
            }
          finally
            {
              [test.c:8:27] D.37052 = {CLOBBER};
            }
        }
      finally
        {
          [/usr/include/c++/10/bits/basic_string.h:525:59]
std::allocator<char>::~allocator ([
/usr/include/c++/10/bits/basic_string.h:525:59] &D.37051);
        }
    }
  finally
    {
      [/usr/include/c++/10/bits/basic_string.h:525:59] D.37051 = {CLOBBER};
    }
  [test.c:9:16] D.40670 = 0;
  [test.c:9:16] return D.40670;
  [test.c:10:1] D.40670 = 0;
  [test.c:10:1] return D.40670;
}
...