Fix typedef through a parameterized sub-interface (#7943 repair) (#8124) (#8128)

src/V3Param.cpp

@@ -2771,6 +2771,8 @@ class ParamVisitor final : public VNVisitor {
             const auto itm = workQueue.cbegin();
             AstNodeModule* const modp = itm->second;
             workQueue.erase(itm);
+            // Starting a new module, so what was learned about the last one no longer holds.
+            v3Global.rootp()->clearContainingModules();
 
             // Process once; note user2 will be cleared on specialization, so we will do the
             // specialized module if needed
@@ -3829,6 +3831,8 @@ void V3Param::param(AstNetlist* rootp) {
 
     if (dumpTreeEitherLevel() >= 9) V3LinkDotIfaceCapture::dumpEntries("before V3Param");
     { ParamTop{rootp}; }
+    // The memo is only good while parameterizing, and the tree moves after.
+    rootp->clearContainingModules();
     V3LinkDotIfaceCapture::purgeStaleRefs();
     if (dumpTreeEitherLevel() >= 9) V3LinkDotIfaceCapture::dumpEntries("after V3Param");