Merge pull request #9604 from adrian-prantl/131871602

Add missing nullptr check

Author: adrian-prantl

lldb/source/Plugins/TypeSystem/Swift/TypeSystemSwiftTypeRef.cpp

@@ -3193,6 +3193,8 @@ lldb::Encoding TypeSystemSwiftTypeRef::GetEncoding(opaque_compiler_type_t type,
     using namespace swift::Demangle;
     Demangler dem;
     auto *node = DemangleCanonicalType(dem, type);
+    if (!node)
+      return lldb::eEncodingInvalid;
     auto kind = node->getKind();
 
     if (kind == Node::Kind::BuiltinTypeName) {