src/test/ui/lint/reasons-forbidden.rs

   1 #![feature(lint_reasons)]
   2
   3 // If you turn off deduplicate diagnostics (which rustc turns on by default but
   4 // compiletest turns off when it runs ui tests), then the errors are
   5 // (unfortunately) repeated here because the checking is done as we read in the
   6 // errors, and currently that happens two or three different times, depending on
   7 // compiler flags.
   8 //
   9 // The test is much cleaner if we deduplicate, though.
  10
  11 // compile-flags: -Z deduplicate-diagnostics=yes
  12
  13 #![forbid(
  14     unsafe_code,
  15     //~^ NOTE `forbid` level set here
  16     //~| NOTE the lint level is defined here
  17     reason = "our errors & omissions insurance policy doesn't cover unsafe Rust"
  18 )]
  19
  20 use std::ptr;
  21
  22 fn main() {
  23     let a_billion_dollar_mistake = ptr::null();
  24
  25     #[allow(unsafe_code)]
  26     //~^ ERROR allow(unsafe_code) incompatible with previous forbid
  27     //~| NOTE our errors & omissions insurance policy doesn't cover unsafe Rust
  28     //~| NOTE overruled by previous forbid
  29     unsafe {
  30         //~^ ERROR usage of an `unsafe` block
  31         //~| NOTE our errors & omissions insurance policy doesn't cover unsafe Rust
  32         *a_billion_dollar_mistake
  33     }
  34 }