Fork channel

Create a new channel as a copy of main.

Rename channel

Rename main to:

Delete channel

Delete main? This cannot be undone.

warning-mapping-1.c
// Check that -w has higher priority than -Werror.
// RUN: %clang_cc1 -verify -Wsign-compare -Werror -w %s
// expected-no-diagnostics

int f0(int x, unsigned y) {
  return x < y;
}