message: Enable CS type erasure
diff: @@ -379,6 +379,7 @@ void IRInstruction::normalize_registers() {
  ++old_srcs_idx;
  }
  for (size_t args_idx = 0; args_idx < args.size(); ++args_idx) {
  + always_assert(old_srcs_idx < srcs_size());
  set_src(srcs_idx++, src(old_srcs_idx));
  old_srcs_idx += is_wide_type(args.at(args_idx)) ? 2 : 1;
  }
  