Bug 1732593

Description of problem:

"clang++ -g main.cc" does not emit debugging information for certain types such as std::string.

Version-Release number of selected component (if applicable):

clang-8.0.0-1.fc30.x86_64

How reproducible:

Always

Steps to Reproduce:
1. std::string my_string{"foo"}
2. Set a breakpoint in lldb past the string declaration
3. In LLDB: "frame var --raw my_string"

Actual results:

(std::string) my_string = {}

Expected results:

(std::string) my_string = {
  _M_dataplus = {
    _M_p = 0x00007fffffffd618
  }
  _M_string_length = 3
   = {
    _M_local_buf = {
      [0] = 'f'
      [1] = 'o'
      [2] = 'o'
      [3] = '\0'
      [4] = '\0'
      [5] = '\0'
      [6] = '\0'
      [7] = '\0'
      [8] = '\x10'
      [9] = '\xd7'
      [10] = '\xff'
      [11] = '\xff'
      [12] = '\xff'
      [13] = '\x7f'
      [14] = '\0'
      [15] = '\0'
    }
    _M_allocated_capacity = 7303014
  }
}


Additional info:

Debug information is produced as expected on Ubuntu 19.04 with "clang++ -g main.cc".

Debug information is included if built with "clang++ -g -fno-limit-debug-info main.cc".  I believe "-g" should include debug information though.