1 // Copyright 2014-2015 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 //! The Rust compiler.
15 //! This API is completely unstable and subject to change.
17 // Do not remove on snapshot creation. Needed for bootstrap. (Issue #22364)
18 #![cfg_attr(stage0, feature(custom_attribute))]
19 #![crate_name = "rustc_driver"]
20 #![unstable(feature = "rustc_private")]
22 #![crate_type = "dylib"]
23 #![crate_type = "rlib"]
24 #![doc(html_logo_url = "http://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png",
25 html_favicon_url = "https://doc.rust-lang.org/favicon.ico",
26 html_root_url = "http://doc.rust-lang.org/nightly/")]
28 #![feature(box_syntax)]
29 #![feature(collections)]
32 #![feature(rustc_diagnostic_macros)]
33 #![feature(rustc_private)]
34 #![feature(staged_api)]
35 #![feature(exit_status)]
36 #![feature(set_stdio)]
41 extern crate graphviz;
44 extern crate rustc_back;
45 extern crate rustc_borrowck;
46 extern crate rustc_lint;
47 extern crate rustc_privacy;
48 extern crate rustc_resolve;
49 extern crate rustc_trans;
50 extern crate rustc_typeck;
51 extern crate serialize;
52 extern crate rustc_llvm as llvm;
53 #[macro_use] extern crate log;
54 #[macro_use] extern crate syntax;
56 pub use syntax::diagnostic;
58 use driver::CompileController;
59 use pretty::{PpMode, UserIdentifiedItem};
61 use rustc_resolve as resolve;
62 use rustc_trans::back::link;
63 use rustc_trans::save;
64 use rustc::session::{config, Session, build_session};
65 use rustc::session::config::{Input, PrintRequest};
66 use rustc::lint::Lint;
69 use rustc::util::common::time;
71 use std::cmp::Ordering::Equal;
73 use std::io::{self, Read, Write};
74 use std::iter::repeat;
75 use std::path::PathBuf;
77 use std::sync::{Arc, Mutex};
80 use rustc::session::early_error;
84 use syntax::diagnostic::Emitter;
85 use syntax::diagnostics;
94 const BUG_REPORT_URL: &'static str =
95 "https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md#bug-reports";
98 pub fn run(args: Vec<String>) -> isize {
99 monitor(move || run_compiler(&args, &mut RustcDefaultCalls));
103 // Parse args and run the compiler. This is the primary entry point for rustc.
104 // See comments on CompilerCalls below for details about the callbacks argument.
105 pub fn run_compiler<'a>(args: &[String],
106 callbacks: &mut CompilerCalls<'a>) {
107 macro_rules! do_or_return {($expr: expr) => {
109 Compilation::Stop => return,
110 Compilation::Continue => {}
114 let matches = match handle_options(args.to_vec()) {
115 Some(matches) => matches,
119 let descriptions = diagnostics_registry();
121 do_or_return!(callbacks.early_callback(&matches, &descriptions));
123 let sopts = config::build_session_options(&matches);
125 let (odir, ofile) = make_output(&matches);
126 let (input, input_file_path) = match make_input(&matches.free) {
127 Some((input, input_file_path)) => callbacks.some_input(input, input_file_path),
128 None => match callbacks.no_input(&matches, &sopts, &odir, &ofile, &descriptions) {
129 Some((input, input_file_path)) => (input, input_file_path),
134 let mut sess = build_session(sopts, input_file_path, descriptions);
135 rustc_lint::register_builtins(&mut sess.lint_store.borrow_mut(), Some(&sess));
136 if sess.unstable_options() {
137 sess.opts.show_span = matches.opt_str("show-span");
139 let cfg = config::build_configuration(&sess);
141 do_or_return!(callbacks.late_callback(&matches, &sess, &input, &odir, &ofile));
143 // It is somewhat unfortunate that this is hardwired in - this is forced by
144 // the fact that pretty_print_input requires the session by value.
145 let pretty = callbacks.parse_pretty(&sess, &matches);
147 Some((ppm, opt_uii)) => {
148 pretty::pretty_print_input(sess, cfg, &input, ppm, opt_uii, ofile);
151 None => {/* continue */ }
154 let plugins = sess.opts.debugging_opts.extra_plugins.clone();
155 let control = callbacks.build_controller(&sess);
156 driver::compile_input(sess, cfg, &input, &odir, &ofile, Some(plugins), control);
159 // Extract output directory and file from matches.
160 fn make_output(matches: &getopts::Matches) -> (Option<PathBuf>, Option<PathBuf>) {
161 let odir = matches.opt_str("out-dir").map(|o| PathBuf::from(&o));
162 let ofile = matches.opt_str("o").map(|o| PathBuf::from(&o));
166 // Extract input (string or file and optional path) from matches.
167 fn make_input(free_matches: &[String]) -> Option<(Input, Option<PathBuf>)> {
168 if free_matches.len() == 1 {
169 let ifile = &free_matches[0][..];
171 let mut src = String::new();
172 io::stdin().read_to_string(&mut src).unwrap();
173 Some((Input::Str(src), None))
175 Some((Input::File(PathBuf::from(ifile)), Some(PathBuf::from(ifile))))
182 // Whether to stop or continue compilation.
183 #[derive(Copy, Clone, Debug, Eq, PartialEq)]
184 pub enum Compilation {
190 pub fn and_then<F: FnOnce() -> Compilation>(self, next: F) -> Compilation {
192 Compilation::Stop => Compilation::Stop,
193 Compilation::Continue => next()
198 // A trait for customising the compilation process. Offers a number of hooks for
199 // executing custom code or customising input.
200 pub trait CompilerCalls<'a> {
201 // Hook for a callback early in the process of handling arguments. This will
202 // be called straight after options have been parsed but before anything
203 // else (e.g., selecting input and output).
204 fn early_callback(&mut self,
206 &diagnostics::registry::Registry)
209 // Hook for a callback late in the process of handling arguments. This will
210 // be called just before actual compilation starts (and before build_controller
211 // is called), after all arguments etc. have been completely handled.
212 fn late_callback(&mut self,
220 // Called after we extract the input from the arguments. Gives the implementer
221 // an opportunity to change the inputs or to add some custom input handling.
222 // The default behaviour is to simply pass through the inputs.
223 fn some_input(&mut self, input: Input, input_path: Option<PathBuf>)
224 -> (Input, Option<PathBuf>) {
228 // Called after we extract the input from the arguments if there is no valid
229 // input. Gives the implementer an opportunity to supply alternate input (by
230 // returning a Some value) or to add custom behaviour for this error such as
231 // emitting error messages. Returning None will cause compilation to stop
233 fn no_input(&mut self,
238 &diagnostics::registry::Registry)
239 -> Option<(Input, Option<PathBuf>)>;
241 // Parse pretty printing information from the arguments. The implementer can
242 // choose to ignore this (the default will return None) which will skip pretty
243 // printing. If you do want to pretty print, it is recommended to use the
244 // implementation of this method from RustcDefaultCalls.
245 // FIXME, this is a terrible bit of API. Parsing of pretty printing stuff
246 // should be done as part of the framework and the implementor should customise
247 // handling of it. However, that is not possible atm because pretty printing
248 // essentially goes off and takes another path through the compiler which
249 // means the session is either moved or not depending on what parse_pretty
250 // returns (we could fix this by cloning, but it's another hack). The proper
251 // solution is to handle pretty printing as if it were a compiler extension,
252 // extending CompileController to make this work (see for example the treatment
253 // of save-analysis in RustcDefaultCalls::build_controller).
254 fn parse_pretty(&mut self,
256 _matches: &getopts::Matches)
257 -> Option<(PpMode, Option<UserIdentifiedItem>)> {
261 // Create a CompilController struct for controlling the behaviour of compilation.
262 fn build_controller(&mut self, &Session) -> CompileController<'a>;
265 // CompilerCalls instance for a regular rustc build.
266 #[derive(Copy, Clone)]
267 pub struct RustcDefaultCalls;
269 impl<'a> CompilerCalls<'a> for RustcDefaultCalls {
270 fn early_callback(&mut self,
271 matches: &getopts::Matches,
272 descriptions: &diagnostics::registry::Registry)
274 match matches.opt_str("explain") {
276 match descriptions.find_description(&code[..]) {
277 Some(ref description) => {
278 // Slice off the leading newline and print.
279 print!("{}", &description[1..]);
282 early_error(&format!("no extended information for {}", code));
285 return Compilation::Stop;
290 return Compilation::Continue;
293 fn no_input(&mut self,
294 matches: &getopts::Matches,
295 sopts: &config::Options,
296 odir: &Option<PathBuf>,
297 ofile: &Option<PathBuf>,
298 descriptions: &diagnostics::registry::Registry)
299 -> Option<(Input, Option<PathBuf>)> {
300 match matches.free.len() {
302 if sopts.describe_lints {
303 let mut ls = lint::LintStore::new();
304 rustc_lint::register_builtins(&mut ls, None);
305 describe_lints(&ls, false);
308 let sess = build_session(sopts.clone(), None, descriptions.clone());
309 rustc_lint::register_builtins(&mut sess.lint_store.borrow_mut(), Some(&sess));
310 let should_stop = RustcDefaultCalls::print_crate_info(&sess, None, odir, ofile);
311 if should_stop == Compilation::Stop {
314 early_error("no input filename given");
316 1 => panic!("make_input should have provided valid inputs"),
317 _ => early_error("multiple input filenames provided")
323 fn parse_pretty(&mut self,
325 matches: &getopts::Matches)
326 -> Option<(PpMode, Option<UserIdentifiedItem>)> {
327 let pretty = if sess.opts.debugging_opts.unstable_options {
328 matches.opt_default("pretty", "normal").map(|a| {
329 // stable pretty-print variants only
330 pretty::parse_pretty(sess, &a, false)
335 if pretty.is_none() && sess.unstable_options() {
336 matches.opt_str("xpretty").map(|a| {
337 // extended with unstable pretty-print variants
338 pretty::parse_pretty(sess, &a, true)
345 fn late_callback(&mut self,
346 matches: &getopts::Matches,
349 odir: &Option<PathBuf>,
350 ofile: &Option<PathBuf>)
352 RustcDefaultCalls::print_crate_info(sess, Some(input), odir, ofile).and_then(
353 || RustcDefaultCalls::list_metadata(sess, matches, input))
356 fn build_controller(&mut self, sess: &Session) -> CompileController<'a> {
357 let mut control = CompileController::basic();
359 if sess.opts.parse_only ||
360 sess.opts.show_span.is_some() ||
361 sess.opts.debugging_opts.ast_json_noexpand {
362 control.after_parse.stop = Compilation::Stop;
365 if sess.opts.no_analysis || sess.opts.debugging_opts.ast_json {
366 control.after_write_deps.stop = Compilation::Stop;
369 if sess.opts.no_trans {
370 control.after_analysis.stop = Compilation::Stop;
373 if !sess.opts.output_types.iter().any(|&i| i == config::OutputTypeExe) {
374 control.after_llvm.stop = Compilation::Stop;
377 if sess.opts.debugging_opts.save_analysis {
378 control.after_analysis.callback = box |state| {
379 time(state.session.time_passes(),
381 state.expanded_crate.unwrap(),
382 |krate| save::process_crate(state.session,
384 state.analysis.unwrap(),
387 control.make_glob_map = resolve::MakeGlobMap::Yes;
394 impl RustcDefaultCalls {
395 pub fn list_metadata(sess: &Session,
396 matches: &getopts::Matches,
399 let r = matches.opt_strs("Z");
400 if r.contains(&("ls".to_string())) {
402 &Input::File(ref ifile) => {
403 let path = &(*ifile);
404 let mut v = Vec::new();
405 metadata::loader::list_file_metadata(&sess.target.target,
408 println!("{}", String::from_utf8(v).unwrap());
411 early_error("cannot list metadata for stdin");
414 return Compilation::Stop;
417 return Compilation::Continue;
421 fn print_crate_info(sess: &Session,
422 input: Option<&Input>,
423 odir: &Option<PathBuf>,
424 ofile: &Option<PathBuf>)
426 if sess.opts.prints.is_empty() {
427 return Compilation::Continue;
430 let attrs = input.map(|input| parse_crate_attrs(sess, input));
431 for req in &sess.opts.prints {
433 PrintRequest::Sysroot => println!("{}", sess.sysroot().display()),
434 PrintRequest::FileNames |
435 PrintRequest::CrateName => {
436 let input = match input {
437 Some(input) => input,
438 None => early_error("no input file provided"),
440 let attrs = attrs.as_ref().unwrap();
441 let t_outputs = driver::build_output_filenames(input,
446 let id = link::find_crate_name(Some(sess),
449 if *req == PrintRequest::CrateName {
453 let crate_types = driver::collect_crate_types(sess, attrs);
454 let metadata = driver::collect_crate_metadata(sess, attrs);
455 *sess.crate_metadata.borrow_mut() = metadata;
456 for &style in &crate_types {
457 let fname = link::filename_for_input(sess,
460 &t_outputs.with_extension(""));
461 println!("{}", fname.file_name().unwrap()
467 return Compilation::Stop;
471 /// Returns a version string such as "0.12.0-dev".
472 pub fn release_str() -> Option<&'static str> {
473 option_env!("CFG_RELEASE")
476 /// Returns the full SHA1 hash of HEAD of the Git repo from which rustc was built.
477 pub fn commit_hash_str() -> Option<&'static str> {
478 option_env!("CFG_VER_HASH")
481 /// Returns the "commit date" of HEAD of the Git repo from which rustc was built as a static string.
482 pub fn commit_date_str() -> Option<&'static str> {
483 option_env!("CFG_VER_DATE")
486 pub fn build_date_str() -> Option<&'static str> {
487 option_env!("CFG_BUILD_DATE")
490 /// Prints version information and returns None on success or an error
491 /// message on panic.
492 pub fn version(binary: &str, matches: &getopts::Matches) {
493 let verbose = matches.opt_present("verbose");
495 println!("{} {}", binary, option_env!("CFG_VERSION").unwrap_or("unknown version"));
497 fn unw(x: Option<&str>) -> &str { x.unwrap_or("unknown") }
498 println!("binary: {}", binary);
499 println!("commit-hash: {}", unw(commit_hash_str()));
500 println!("commit-date: {}", unw(commit_date_str()));
501 println!("build-date: {}", unw(build_date_str()));
502 println!("host: {}", config::host_triple());
503 println!("release: {}", unw(release_str()));
507 fn usage(verbose: bool, include_unstable_options: bool) {
508 let groups = if verbose {
509 config::rustc_optgroups()
511 config::rustc_short_optgroups()
513 let groups : Vec<_> = groups.into_iter()
514 .filter(|x| include_unstable_options || x.is_stable())
517 let message = format!("Usage: rustc [OPTIONS] INPUT");
518 let extra_help = if verbose {
521 "\n --help -v Print the full set of options rustc accepts"
525 -C help Print codegen options
526 -W help Print 'lint' options and default settings
527 -Z help Print internal options for debugging rustc{}\n",
528 getopts::usage(&message, &groups),
532 fn describe_lints(lint_store: &lint::LintStore, loaded_plugins: bool) {
534 Available lint options:
535 -W <foo> Warn about <foo>
538 -F <foo> Forbid <foo> (deny, and deny all overrides)
542 fn sort_lints(lints: Vec<(&'static Lint, bool)>) -> Vec<&'static Lint> {
543 let mut lints: Vec<_> = lints.into_iter().map(|(x, _)| x).collect();
544 lints.sort_by(|x: &&Lint, y: &&Lint| {
545 match x.default_level.cmp(&y.default_level) {
546 // The sort doesn't case-fold but it's doubtful we care.
547 Equal => x.name.cmp(y.name),
554 fn sort_lint_groups(lints: Vec<(&'static str, Vec<lint::LintId>, bool)>)
555 -> Vec<(&'static str, Vec<lint::LintId>)> {
556 let mut lints: Vec<_> = lints.into_iter().map(|(x, y, _)| (x, y)).collect();
557 lints.sort_by(|&(x, _): &(&'static str, Vec<lint::LintId>),
558 &(y, _): &(&'static str, Vec<lint::LintId>)| {
564 let (plugin, builtin): (Vec<_>, _) = lint_store.get_lints()
565 .iter().cloned().partition(|&(_, p)| p);
566 let plugin = sort_lints(plugin);
567 let builtin = sort_lints(builtin);
569 let (plugin_groups, builtin_groups): (Vec<_>, _) = lint_store.get_lint_groups()
570 .iter().cloned().partition(|&(_, _, p)| p);
571 let plugin_groups = sort_lint_groups(plugin_groups);
572 let builtin_groups = sort_lint_groups(builtin_groups);
574 let max_name_len = plugin.iter().chain(builtin.iter())
575 .map(|&s| s.name.chars().count())
577 let padded = |x: &str| {
578 let mut s = repeat(" ").take(max_name_len - x.chars().count())
579 .collect::<String>();
584 println!("Lint checks provided by rustc:\n");
585 println!(" {} {:7.7} {}", padded("name"), "default", "meaning");
586 println!(" {} {:7.7} {}", padded("----"), "-------", "-------");
588 let print_lints = |lints: Vec<&Lint>| {
590 let name = lint.name_lower().replace("_", "-");
591 println!(" {} {:7.7} {}",
592 padded(&name[..]), lint.default_level.as_str(), lint.desc);
597 print_lints(builtin);
601 let max_name_len = plugin_groups.iter().chain(builtin_groups.iter())
602 .map(|&(s, _)| s.chars().count())
604 let padded = |x: &str| {
605 let mut s = repeat(" ").take(max_name_len - x.chars().count())
606 .collect::<String>();
611 println!("Lint groups provided by rustc:\n");
612 println!(" {} {}", padded("name"), "sub-lints");
613 println!(" {} {}", padded("----"), "---------");
615 let print_lint_groups = |lints: Vec<(&'static str, Vec<lint::LintId>)>| {
616 for (name, to) in lints {
617 let name = name.to_lowercase().replace("_", "-");
618 let desc = to.into_iter().map(|x| x.as_str().replace("_", "-"))
619 .collect::<Vec<String>>().connect(", ");
621 padded(&name[..]), desc);
626 print_lint_groups(builtin_groups);
628 match (loaded_plugins, plugin.len(), plugin_groups.len()) {
629 (false, 0, _) | (false, _, 0) => {
630 println!("Compiler plugins can provide additional lints and lint groups. To see a \
631 listing of these, re-run `rustc -W help` with a crate filename.");
633 (false, _, _) => panic!("didn't load lint plugins but got them anyway!"),
634 (true, 0, 0) => println!("This crate does not load any lint plugins or lint groups."),
637 println!("Lint checks provided by plugins loaded by this crate:\n");
641 println!("Lint groups provided by plugins loaded by this crate:\n");
642 print_lint_groups(plugin_groups);
648 fn describe_debug_flags() {
649 println!("\nAvailable debug options:\n");
650 for &(name, _, opt_type_desc, desc) in config::DB_OPTIONS {
651 let (width, extra) = match opt_type_desc {
652 Some(..) => (21, "=val"),
655 println!(" -Z {:>width$}{} -- {}", name.replace("_", "-"),
656 extra, desc, width=width);
660 fn describe_codegen_flags() {
661 println!("\nAvailable codegen options:\n");
662 for &(name, _, opt_type_desc, desc) in config::CG_OPTIONS {
663 let (width, extra) = match opt_type_desc {
664 Some(..) => (21, "=val"),
667 println!(" -C {:>width$}{} -- {}", name.replace("_", "-"),
668 extra, desc, width=width);
672 /// Process command line options. Emits messages as appropriate. If compilation
673 /// should continue, returns a getopts::Matches object parsed from args, otherwise
675 pub fn handle_options(mut args: Vec<String>) -> Option<getopts::Matches> {
676 // Throw away the first argument, the name of the binary
677 let _binary = args.remove(0);
680 // user did not write `-v` nor `-Z unstable-options`, so do not
681 // include that extra information.
686 fn allows_unstable_options(matches: &getopts::Matches) -> bool {
687 let r = matches.opt_strs("Z");
688 r.iter().any(|x| *x == "unstable-options")
691 fn parse_all_options(args: &Vec<String>) -> getopts::Matches {
692 let all_groups : Vec<getopts::OptGroup>
693 = config::rustc_optgroups().into_iter().map(|x|x.opt_group).collect();
694 match getopts::getopts(&args[..], &all_groups) {
696 if !allows_unstable_options(&m) {
697 // If -Z unstable-options was not specified, verify that
698 // no unstable options were present.
699 for opt in config::rustc_optgroups().into_iter().filter(|x| !x.is_stable()) {
700 let opt_name = if !opt.opt_group.long_name.is_empty() {
701 &opt.opt_group.long_name
703 &opt.opt_group.short_name
705 if m.opt_present(opt_name) {
706 early_error(&format!("use of unstable option '{}' requires \
707 -Z unstable-options", opt_name));
713 Err(f) => early_error(&f.to_string())
717 // As a speed optimization, first try to parse the command-line using just
718 // the stable options.
719 let matches = match getopts::getopts(&args[..], &config::optgroups()) {
720 Ok(ref m) if allows_unstable_options(m) => {
721 // If -Z unstable-options was specified, redo parsing with the
722 // unstable options to ensure that unstable options are defined
723 // in the returned getopts::Matches.
724 parse_all_options(&args)
728 // redo option parsing, including unstable options this time,
729 // in anticipation that the mishandled option was one of the
731 parse_all_options(&args)
735 if matches.opt_present("h") || matches.opt_present("help") {
736 usage(matches.opt_present("verbose"), allows_unstable_options(&matches));
740 // Don't handle -W help here, because we might first load plugins.
742 let r = matches.opt_strs("Z");
743 if r.iter().any(|x| *x == "help") {
744 describe_debug_flags();
748 let cg_flags = matches.opt_strs("C");
749 if cg_flags.iter().any(|x| *x == "help") {
750 describe_codegen_flags();
754 if cg_flags.contains(&"passes=list".to_string()) {
755 unsafe { ::llvm::LLVMRustPrintPasses(); }
759 if matches.opt_present("version") {
760 version("rustc", &matches);
767 fn parse_crate_attrs(sess: &Session, input: &Input) ->
768 Vec<ast::Attribute> {
769 let result = match *input {
770 Input::File(ref ifile) => {
771 parse::parse_crate_attrs_from_file(ifile,
775 Input::Str(ref src) => {
776 parse::parse_crate_attrs_from_source_str(
777 driver::anon_src().to_string(),
783 result.into_iter().collect()
786 /// Run a procedure which will detect panics in the compiler and print nicer
787 /// error messages rather than just failing the test.
789 /// The diagnostic emitter yielded to the procedure should be used for reporting
790 /// errors of the compiler.
791 pub fn monitor<F:FnOnce()+Send+'static>(f: F) {
792 const STACK_SIZE: usize = 8 * 1024 * 1024; // 8MB
794 struct Sink(Arc<Mutex<Vec<u8>>>);
795 impl Write for Sink {
796 fn write(&mut self, data: &[u8]) -> io::Result<usize> {
797 Write::write(&mut *self.0.lock().unwrap(), data)
799 fn flush(&mut self) -> io::Result<()> { Ok(()) }
802 let data = Arc::new(Mutex::new(Vec::new()));
803 let err = Sink(data.clone());
805 let mut cfg = thread::Builder::new().name("rustc".to_string());
807 // FIXME: Hacks on hacks. If the env is trying to override the stack size
808 // then *don't* set it explicitly.
809 if env::var_os("RUST_MIN_STACK").is_none() {
810 cfg = cfg.stack_size(STACK_SIZE);
813 match cfg.spawn(move || { io::set_panic(box err); f() }).unwrap().join() {
814 Ok(()) => { /* fallthrough */ }
816 // Thread panicked without emitting a fatal diagnostic
817 if !value.is::<diagnostic::FatalError>() {
818 let mut emitter = diagnostic::EmitterWriter::stderr(diagnostic::Auto, None);
820 // a .span_bug or .bug call has already printed what
821 // it wants to print.
822 if !value.is::<diagnostic::ExplicitBug>() {
831 "the compiler unexpectedly panicked. this is a bug.".to_string(),
832 format!("we would appreciate a bug report: {}",
836 emitter.emit(None, ¬e[..], None, diagnostic::Note)
838 if let None = env::var_os("RUST_BACKTRACE") {
839 emitter.emit(None, "run with `RUST_BACKTRACE=1` for a backtrace",
840 None, diagnostic::Note);
843 println!("{}", str::from_utf8(&data.lock().unwrap()).unwrap());
846 // Panic so the process returns a failure code, but don't pollute the
847 // output with some unnecessary panic messages, we've already
848 // printed everything that we needed to.
849 io::set_panic(box io::sink());
855 pub fn diagnostics_registry() -> diagnostics::registry::Registry {
856 use syntax::diagnostics::registry::Registry;
858 let mut all_errors = Vec::new();
859 all_errors.push_all(&rustc::DIAGNOSTICS);
860 all_errors.push_all(&rustc_typeck::DIAGNOSTICS);
861 all_errors.push_all(&rustc_borrowck::DIAGNOSTICS);
862 all_errors.push_all(&rustc_resolve::DIAGNOSTICS);
864 Registry::new(&*all_errors)
868 let result = run(env::args().collect());
869 std::env::set_exit_status(result as i32);