gdb error on openbsd

(gdb) x/i 0x7c00
0x7c00: mov    $0xd88e07c0,%eax
(gdb) set architecture i8086
The target architecture is assumed to be i8086
(gdb) x/i 0x7c00
0x7c00: mov    $0x7c0,%ax
(gdb)
0x7c03: mov    %ax,%ds
(gdb)
0x7c05: mov    $0x7e0,%ax
(gdb) s
/usr/src/gnu/usr.bin/binutils/gdb/regcache.c:609: internal-error: void regcache_raw_read(struct regcache *, int, void *): Assertion `regcache == current_regcache' failed.
A problem internal to GDB has been detected,
further debugging may prove unreliable.
Quit this debugging session? (y or n)