Create a new channel as a copy of main.
Rename main to:
Delete main? This cannot be undone.
// RUN: %clang_cc1 -verify -fopenmp -fopenmp-version=50 -frecovery-ast %s void foo(int i) { #pragma omp target update from(i) device(undef()) // expected-error {{use of undeclared identifier 'undef'}} }