OpenBSD Intel32bit native exception failure

[rmottola]

Native exceptions on OpenBSD Intel 32bit do not work.
Even without unwind lib, I have this:

On OpenBSD 7.3 with GCC 11.2, I get this stacktrace that shows breackage inside gcc unwind itself:

#0  thrkill () at /tmp/-:3
#1  0x0ca714f0 in _libc_raise (s=6) at /usr/src/lib/libc/gen/raise.c:37
#2  0x0ca947e6 in _libc_abort () at /usr/src/lib/libc/stdlib/abort.c:51
#3  0x09dabcd5 in uw_init_context_1 (
    context=<error reading variable: dwarf2_find_location_expression: Corrupted DWARF expression.>, 
    context@entry=0xcf7dc970, 
    outer_cfa=<error reading variable: dwarf2_find_location_expression: Corrupted DWARF expression.>, 
    outer_cfa@entry=0xcf7dcb50, 
    outer_ra=<error reading variable: dwarf2_find_location_expression: Corrupted DWARF expression.>)
    at /pobj/gcc-11.2.0/gcc-11.2.0/libgcc/unwind-pe.h:88
#4  0x09dab7ff in _Unwind_RaiseException (exc=0x57803940) at /pobj/gcc-11.2.0/gcc-11.2.0/libgcc/unwind-dw2.c:1381
#5  0x09da9120 in objc_exception_throw (exception=0x749ff990) at /pobj/gcc-11.2.0/gcc-11.2.0/libobjc/exception.c:515
#6  0x006f579e in -[NSException raise] (self=0x749ff990, _cmd=0x20437c90 <_OBJC_SELECTOR_TABLE+272>)
    at NSException.m:1615
#7  0x006f4918 in +[NSException raise:format:arguments:] (self=0x20437e40 <_OBJC_Class_NSException>, 
    _cmd=0x20437c78 <_OBJC_SELECTOR_TABLE+248>, name=0x3521b6b4 <_OBJC_INSTANCE_7.8>, 
    format=0x3521b714 <_OBJC_INSTANCE_15.0>, argList=0xcf7dcc40 "\212\300!\025\060") at NSException.m:1494
#8  0x006f5425 in +[NSException raise:format:] (self=0x20437e40 <_OBJC_Class_NSException>, 
    _cmd=0x3521b838 <_OBJC_SELECTOR_TABLE+152>, name=0x3521b6b4 <_OBJC_INSTANCE_7.8>, 
    format=0x3521b714 <_OBJC_INSTANCE_15.0>) at NSException.m:1403
#9  0x1522b596 in gnustep_base_user_main () at basic.m:48
#10 0x00789882 in main (argc=1, argv=0xcf7dcd94, env=0xcf7dcd9c) at NSProcessInfo.m:1867
#11 0x1521eb05 in _start ()