KT_FAIL
KT_FAIL(ctx, "this is a fail result");
KT_FAIL(ctx, "mp size %u != %u", msgdsize(mp), len);
KT_FAIL(ctx, "mp[%02X] %08X != %08X", (i - fail_len),
KT_FAIL(ctx, "fewer packets returned than expected");
KT_FAIL(ctx, "more packets returned than expected");
KT_FAIL(ctx,
KT_FAIL(ctx,