vala: check for null parent symbol

diff --git a/vala/valadelegatetype.vala b/vala/valadelegatetype.vala
index 704f98c8b4b375d00119148482ea030fa2d1aeab..11ba57f002ec363f1541136056457d4fe7bd3231 100644 (file)
--- a/vala/valadelegatetype.vala
+++ b/vala/valadelegatetype.vala
@@ -51,7 +51,7 @@ public class Vala.DelegateType : DataType {
                // logic temporarily duplicated from DataType class
 
                Symbol global_symbol = delegate_symbol;
-               while (global_symbol.parent_symbol.name != null) {
+               while (global_symbol.parent_symbol != null && global_symbol.parent_symbol.name != null) {
                        global_symbol = global_symbol.parent_symbol;
                }