- do not delete the namespaces when removing compiler symbols. They still get referenced by some types and must remain until the engine shuts down.

src/dobjtype.cpp

@@ -267,6 +267,7 @@ void PClass::StaticShutdown ()
 	{
 		p.PendingWeapon = nullptr;
 	}
+	Namespaces.ReleaseSymbols();
 
 	// This must be done in two steps because the native classes are not ordered by inheritance,
 	// so all meta data must be gone before deleting the actual class objects.
@@ -275,7 +276,6 @@ void PClass::StaticShutdown ()
 	// Unless something went wrong, anything left here should be class and type objects only, which do not own any scripts.
 	bShutdown = true;
 	TypeTable.Clear();
-	Namespaces.ReleaseSymbols();
 	ClassDataAllocator.FreeAllBlocks();
 	AllClasses.Clear();
 	PClassActor::AllActorClasses.Clear();

src/scripting/symbols.cpp

@@ -512,13 +512,16 @@ PNamespace *FNamespaceManager::NewNamespace(int filenum)
 
 //==========================================================================
 //
-//
+// Deallocate the entire namespace manager.
 //
 //==========================================================================
 
 void FNamespaceManager::ReleaseSymbols()
 {
-	RemoveSymbols();
+	for (auto ns : AllNamespaces)
+	{
+		delete ns;
+	}
 	GlobalNamespace = nullptr;
 	AllNamespaces.Clear();
 }
@@ -537,7 +540,7 @@ int FNamespaceManager::RemoveSymbols()
 	for (auto ns : AllNamespaces)
 	{
 		count += ns->Symbols.Symbols.CountUsed();
-		delete ns;
+		ns->Symbols.ReleaseSymbols();
 	}
 	return count;
 }
@@ -550,7 +553,6 @@ int FNamespaceManager::RemoveSymbols()
 
 void RemoveUnusedSymbols()
 {
-	// Global symbols are not needed anymore after running the compiler.
 	int count = Namespaces.RemoveSymbols();
 
 	// We do not need any non-field and non-function symbols in structs and classes anymore.