Re: [Tinycc-devel] Bug using -g with line directive

[Herman ten Brugge]

On 1/16/23 20:33, Herman ten Brugge wrote:
> On 1/16/23 16:14, Levo D wrote:
> > Using ee3fef2ce2a8c46452ff44b59d5175dc90bf4f4c I compiled and tested 
> > in 3 places using make install before the test
> >
> > 1. Local machine, crashes using gdb 12.1
> > 2. Debian box, works, using 10.1
> > 3. Mac, doesn't work using lldb-1400.0.38.13.
> >
> > Copying the binary I made on the debian box to my local computer 
> > upset gdb 12.1. Using tcc -g -nostdlib (otherwise debian gdb 
> > complains about wrong glibc version) I am able to debug it using gdb 
> > 10.1 on my debian box
> >
> > Should I write a debug report to gdb? The error it gives is 
> > "../../gdb/psymtab.c:1142: internal-error: expand_symtabs_matching: 
> > Assertion `symtab != nullptr' failed."
> I See problem 1 when using stab format. This is deprecated in gcc and 
> probably will be deprecated in gdb. Please use dwarf.
> I just pushed an update for macos. The DW_LNS_set_file dwarf has an 
> offset of 1 on macos.
I used an older gcc to compile the code with -gstabs (gcc 12.2.1 does 
not support stabs anymore) and then gdb also dumps core.

If I use:
gdb --readnow ./a.out -batch -ex 'br a.bolin:5' -ex 'r'

It works with older gcc and tcc.

So it is probably a stabs bug in gdb.