Fix crash when demangling certain names

Fixes #6261

1 files changed, 8 insertions, 3 deletions

diff --git a/demangler/gnu3/demangle_gnu3.cpp b/demangler/gnu3/demangle_gnu3.cpp
index 26dc99fe..bd96b3f7 100644
--- a/demangler/gnu3/demangle_gnu3.cpp
+++ b/demangler/gnu3/demangle_gnu3.cpp
@@ -88,9 +88,14 @@ static void ExtendTypeName(TypeBuilder& type, const string& extend)
 		qn.back() += extend;
 	else
 		qn.push_back(extend);
-	type.SetNamedTypeReference(
-		NamedTypeReference::GenerateAutoDemangledTypeReference(type.GetNamedTypeReference()->GetTypeReferenceClass(), qn)
-	);
+
+	// This type might not be an NTR (Vector35/binaryninja-api#6261)
+	if (type.GetClass() == NamedTypeReferenceClass)
+	{
+		type.SetNamedTypeReference(
+			NamedTypeReference::GenerateAutoDemangledTypeReference(type.GetNamedTypeReference()->GetTypeReferenceClass(), qn)
+		);
+	}
 }