GDB from current broken on mips64eb

GDB 7.10.1 from current (20160910) on ERLITE (mips64eb, n32 ABI)
seems broken:

   % cc -g -O0 hello.c && gdb ./a.out
   GNU gdb (GDB) 7.10.1
   (snip)
   Reading symbols from ./a.out...done.
   (gdb) r
   Starting program: /home/rin/a.out
   Hello, World!

Then, it hangs indefinitely. The target process became zombie,
and it cannot be killed even with "kill -9":

   % ps
     PID TTY   STAT    TIME COMMAND
   (snip)
   16416 pts/2 S    0:00.40 gdb ./a.out
   25851 pts/2 DXE+ 0:00.00 (a.out)
   %

Would it be better to send-pr?

Thanks,
Rin