std.debug.Dwarf.SelfUnwinder: skip caching rules for unsupported registers

For unwinding purposes, we don't care about unsupported registers. Yet because
we added these rules to the cache entry, we'd later try to evaluate them and
thus fail the unwind attempt for no good reason. They'd also take up cache rule
slots that would be better spent on actually relevant registers.

Note that any attempt to read unsupported registers during unwinding will still
fail the unwind attempt as expected.

0 files changed, 0 insertions, 0 deletions