Fix compilation failures from wrong calls of error specializations

Author: msimacek

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/modules/io/IOModuleBuiltins.java

@@ -231,7 +231,7 @@ protected static Object openText(VirtualFrame frame, Object file, IONodes.IOMode
 
                 /* if not buffering, returns the raw file object */
                 if (buffering == 0) {
-                    invalidunbuf(file, mode, bufferingValue, encoding, errors, newline, closefd, opener, raiseNode);
+                    throw raiseNode.raise(inliningTarget, ValueError, CAN_T_HAVE_UNBUFFERED_TEXT_IO);
                 }
 
                 /* wraps into a buffered file */

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/objects/referencetype/ReferenceTypeBuiltins.java

@@ -211,7 +211,7 @@ PReferenceType refType(Object cls, PythonAbstractNativeObject pythonObject, Obje
                 CApiTransitions.addNativeWeakRef(getContext(), pythonObject);
                 return PFactory.createReferenceType(language, cls, getInstanceShape.execute(cls), pythonObject, actualCallback, getWeakReferenceQueue(inliningTarget, readQueueNode));
             } else {
-                return refType(cls, pythonObject, actualCallback, raiseNode);
+                throw raiseNode.raise(inliningTarget, TypeError, ErrorMessages.CANNOT_CREATE_WEAK_REFERENCE_TO, pythonObject);
             }
         }