cuda-gdb unable to inspect registers

hi - my cuda-gdb is unable to inspect registers for some reason

eg. i have something like:

tid = threadIdx;

and I break right after the line, and then I try to inspect/print it, i just get a very large number like 67500 or something

I can inspect arrays, threadIdx.x, values passed into kernel arguments fine, but not values declared/defined within a kernel function.

any ideas?