"fc-addr=%p, fc-type=%d, base-length=%zu, "
"stack-size-before=%zu, stack-size-after=%zu",
stack, base_class, base_class->type,
"fc-addr=%p, fc-type=%d, base-length=%zu, "
"stack-size-before=%zu, stack-size-after=%zu",
stack, base_class, base_class->type,