| // https://github.com/rust-lang/rust/issues/36023 |
| //@ run-pass |
| #![allow(unused_variables)] |
| use std::ops::Deref; |
| |
| fn main() { |
| if env_var("FOOBAR").as_ref().map(Deref::deref).ok() == Some("yes") { |
| panic!() |
| } |
| |
| let env_home: Result<String, ()> = Ok("foo-bar-baz".to_string()); |
| let env_home = env_home.as_ref().map(Deref::deref).ok(); |
| |
| if env_home == Some("") { panic!() } |
| } |
| |
| #[inline(never)] |
| fn env_var(s: &str) -> Result<String, VarError> { |
| Err(VarError::NotPresent) |
| } |
| |
| pub enum VarError { |
| NotPresent, |
| NotUnicode(String), |
| } |
