572d3d9634
Use `panic::set_hook` to print the ICE message This allows custom frontends and backends to override the hook with their own, for example to point people to a different issue tracker. ICE messages are printed in a slightly different order now. Nightly prints: ``` thread 'rustc' panicked at 'called `Option::unwrap()` on a `None` value', src/libcore/option.rs:347:21 note: Run with `RUST_BACKTRACE=1` environment variable to display a backtrace. error: aborting due to 2 previous errors Some errors have detailed explanations: E0277, E0658. For more information about an error, try `rustc --explain E0277`. error: internal compiler error: unexpected panic note: the compiler unexpectedly panicked. this is a bug. note: we would appreciate a bug report: https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md#bug-reports note: rustc 1.36.0-nightly (08bfe1612 2019-05-02) running on x86_64-unknown-linux-gnu ``` After this PR, rustc prints: ``` thread 'rustc' panicked at 'called `Option::unwrap()` on a `None` value', src/libcore/option.rs:347:21 note: Run with `RUST_BACKTRACE=1` environment variable to display a backtrace. error: internal compiler error: unexpected panic note: the compiler unexpectedly panicked. this is a bug. note: we would appreciate a bug report: https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md#bug-reports note: rustc 1.36.0-dev running on x86_64-unknown-linux-gnu error: aborting due to 2 previous errors Some errors have detailed explanations: E0277, E0658. For more information about an error, try `rustc --explain E0277`. ```
The driver crate is effectively the "main" function for the rust
compiler. It orchestrates the compilation process and "knits together"
the code from the other crates within rustc. This crate itself does
not contain any of the "main logic" of the compiler (though it does
have some code related to pretty printing or other minor compiler
options).
For more information about how the driver works, see the rustc guide.