[Bug debug/113977] New: debug info for alignment of structure is unspecified

["tsqurt at outlook dot com" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113977

            Bug ID: 113977
           Summary: debug info for alignment of structure is unspecified
           Product: gcc
           Version: 13.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: debug
          Assignee: unassigned at gcc dot gnu.org
          Reporter: tsqurt at outlook dot com
  Target Milestone: ---

Created attachment 57454
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=57454&action=edit
src.c

GCC does not generate complete debug information for my C code when generating
debug information. The alignment requirement for my structures is 1, but the
debugger believes their alignment requirement is 8 (which is likely inherited
from the default structure alignment requirement on the platform). 
I'm using the AMD64 instruction set, and the operating system is Ubuntu 20.04.6
LTS on Windows Subsystem for Linux.

To reproduce this issue, follow these steps with the attached code:

gcc src.c -gdwarf-5 -o a.out && gdb a.out
(gdb) b 13
Breakpoint 1 at 0x1170: file src.c, line 13.
(gdb) run
Starting program: a.out 

Breakpoint 1, main () at src.c:13
13        return 0;
(gdb) expr z[0]._[0] = 1
(gdb) expr y[0]._[0] = 1
(gdb) expr x[0]._[0] = 1
gdb command line:1:1: error: alignment of array elements is greater than
element size
Compilation failed.
(gdb) 

GDB reports that the alignment requirement for these structures is 8, but it is
1.