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.