bug fix #748

CodeCompletion/SymTable.cs

@@ -369,6 +369,8 @@ namespace CodeCompletion
         {
             if (ts is TypeSynonim)
                 return GetExtensionMethods((ts as TypeSynonim).actType);
+            if (ts.original_type != null)
+                return GetExtensionMethods(ts.original_type);
             List<ProcScope> lst = new List<ProcScope>();
             List<ProcScope> meths = null;
             TypeScope tmp_ts = ts;

TestSuite/intellisense_tests/extensionmethods6.pas

@@ -0,0 +1,8 @@
+type t1<T> = class end;
+
+procedure p1(self:t1<T>); extensionmethod := exit;
+
+begin
+  var a := new t1<byte>;
+  a.p1{@(расширение) procedure t1<T>.p1();@};
+end.