src/test/mir-opt/retain-never-const.rs

   1 // Regression test for #66975 - ensure that we don't keep unevaluated
   2 // `!`-typed constants until codegen.
   3
   4 // Force generation of optimized mir for functions that do not reach codegen.
   5 // compile-flags: --emit mir,link
   6
   7 #![feature(const_panic)]
   8 #![feature(never_type)]
   9 #![warn(const_err)]
  10
  11 struct PrintName<T>(T);
  12
  13 impl<T> PrintName<T> {
  14     const VOID: ! = panic!();
  15 }
  16
  17 // EMIT_MIR rustc.no_codegen.PreCodegen.after.mir
  18 fn no_codegen<T>() {
  19     let _ = PrintName::<T>::VOID;
  20 }
  21
  22 fn main() {}