libvaladoc: TypeReference: Add missing null checks

diff --git a/src/libvaladoc/api/typereference.vala b/src/libvaladoc/api/typereference.vala
index 8b7428b30a0df0e7fc76627978c555251ec5abe5..e7adfe87ec9694903d4636ff5422c5225b1d2626 100644 (file)
--- a/src/libvaladoc/api/typereference.vala
+++ b/src/libvaladoc/api/typereference.vala
@@ -51,6 +51,10 @@ public class Valadoc.Api.TypeReference : Item {
 
        public bool pass_ownership {
                get {
+                       if (this.vtyperef == null) {
+                               return false;
+                       }
+
                        Vala.CodeNode? node = this.vtyperef.parent_node;
                        if (node == null) {
                                return false;
@@ -69,6 +73,10 @@ public class Valadoc.Api.TypeReference : Item {
 
        public bool is_owned {
                get {
+                       if (this.vtyperef == null) {
+                               return false;
+                       }
+
                        Vala.CodeNode parent = this.vtyperef.parent_node;
 
                        // parameter:
@@ -101,7 +109,7 @@ public class Valadoc.Api.TypeReference : Item {
 
        public bool is_dynamic {
                get {
-                       return this.vtyperef.is_dynamic;
+                       return this.vtyperef != null && this.vtyperef.is_dynamic;
                }
        }
 
@@ -123,14 +131,19 @@ public class Valadoc.Api.TypeReference : Item {
 
        public bool is_nullable {
                get {
-                       return this.vtyperef.nullable
+                       return this.vtyperef != null
+                              && this.vtyperef.nullable
                               && !(this.vtyperef is Vala.GenericType)
                               && !(this.vtyperef is Vala.PointerType);
                }
        }
 
        public string? get_dbus_type_signature () {
-               return Vala.DBusModule.get_type_signature (vtyperef);
+               if (vtyperef != null) {
+                       return Vala.DBusModule.get_type_signature (vtyperef);
+               } else {
+                       return null;
+               }
        }
 
        internal override void resolve_type_references (Tree root) {