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May 19th, 2019
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  1. #![allow(unreachable_code)]
  2.  
  3.  
  4. fn main() {
  5. println!("{:?}", {
  6. let a = [1u8, 2, 3]; let b = &a[4..];
  7. });
  8. }
  9.  
  10.  
  11. /* ~~~~=== stderr ===~~~~
  12. Compiling playground v0.0.1 (/playground)
  13. warning: unused variable: `b`
  14. --> src/main.rs:6:34
  15. |
  16. 6 | let a = [1u8, 2, 3]; let b = &a[4..];
  17. | ^ help: consider prefixing with an underscore: `_b`
  18. |
  19. = note: #[warn(unused_variables)] on by default
  20.  
  21. Finished dev [unoptimized + debuginfo] target(s) in 0.69s
  22. Running `target/debug/playground`
  23. thread 'main' panicked at 'slice index starts at 4 but ends at 3', src/libcore/slice/mod.rs:2419:5
  24. note: Run with `RUST_BACKTRACE=1` environment variable to display a backtrace.
  25.  
  26. */
  27.  
  28. /* ~~~~=== stdout ===~~~~
  29.  
  30. */
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