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-rw-r--r--passes/cmds/design.cc5
1 files changed, 4 insertions, 1 deletions
diff --git a/passes/cmds/design.cc b/passes/cmds/design.cc
index 169f7cc4a..168d38563 100644
--- a/passes/cmds/design.cc
+++ b/passes/cmds/design.cc
@@ -118,6 +118,9 @@ struct DesignPass : public Pass {
std::string save_name, load_name, as_name, delete_name;
std::vector<RTLIL::Module*> copy_src_modules;
+ if (!design)
+ log_cmd_error("No default design.\n");
+
size_t argidx;
for (argidx = 1; argidx < args.size(); argidx++)
{
@@ -280,7 +283,7 @@ struct DesignPass : public Pass {
done[mod->name] = prefix;
}
- while (!queue.empty())
+ while (!queue.empty() && copy_from_design)
{
pool<Module*> old_queue;
old_queue.swap(queue);