bug fix #2284

Compiler/PCU/PCUWrappers.cs

@@ -383,7 +383,7 @@ namespace PascalABCCompiler.PCU
             if (this.base_generic_instance != null && sil != null)
             {
                 var bsil = base_generic_instance.ConvertSymbolInfo(sil);
-                if (orig_generic_or_null == null)  
+                if (orig_generic_or_null == null && name != "op_Implicit")  
                     return bsil;
             }
             foreach (SymbolInfo si in sil)

TestSuite/units/u_generics4.pas

@@ -0,0 +1,14 @@
+unit u_generics4;
+
+type
+  
+  c1<T> = class
+    
+    public static function operator implicit(o: T): c1<T> := nil;
+    
+  end;
+  
+  
+  c2<T1, T2> = class(c1<T2>) end;
+  
+end.

TestSuite/usesunits/use_generics4.pas

@@ -0,0 +1,7 @@
+uses u_generics4; 
+function f1: c1<byte> := new c2<word, byte>;
+
+begin
+  var o := f1;
+  assert(o <> nil);
+end.