src/librustdoc/core.rs

   1 use rustc_lint;
   2 use rustc_driver::{self, driver, target_features, abort_on_err};
   3 use rustc::session::{self, config};
   4 use rustc::hir::def_id::{DefId, DefIndex, DefIndexAddressSpace, CrateNum, LOCAL_CRATE};
   5 use rustc::hir::def::Def;
   6 use rustc::hir::{self, HirVec};
   7 use rustc::middle::cstore::CrateStore;
   8 use rustc::middle::privacy::AccessLevels;
   9 use rustc::ty::{self, TyCtxt, AllArenas};
  10 use rustc::hir::map as hir_map;
  11 use rustc::lint::{self, LintPass};
  12 use rustc::session::config::ErrorOutputType;
  13 use rustc::util::nodemap::{FxHashMap, FxHashSet};
  14 use rustc_resolve as resolve;
  15 use rustc_metadata::creader::CrateLoader;
  16 use rustc_metadata::cstore::CStore;
  17 use rustc_target::spec::TargetTriple;
  18
  19 use syntax::ast::{self, Ident, NodeId};
  20 use syntax::source_map;
  21 use syntax::feature_gate::UnstableFeatures;
  22 use syntax::json::JsonEmitter;
  23 use syntax::ptr::P;
  24 use syntax::symbol::keywords;
  25 use syntax_pos::DUMMY_SP;
  26 use errors::{self, FatalError};
  27 use errors::emitter::{Emitter, EmitterWriter};
  28 use parking_lot::ReentrantMutex;
  29
  30 use std::cell::RefCell;
  31 use std::mem;
  32 use rustc_data_structures::sync::{self, Lrc};
  33 use std::rc::Rc;
  34 use std::sync::Arc;
  35
  36 use visit_ast::RustdocVisitor;
  37 use config::{Options as RustdocOptions, RenderOptions};
  38 use clean;
  39 use clean::{get_path_for_type, Clean, MAX_DEF_ID, AttributesExt};
  40 use html::render::RenderInfo;
  41 use passes;
  42
  43 pub use rustc::session::config::{Input, Options, CodegenOptions};
  44 pub use rustc::session::search_paths::SearchPath;
  45
  46 pub type ExternalPaths = FxHashMap<DefId, (Vec<String>, clean::TypeKind)>;
  47
  48 pub struct DocContext<'a, 'tcx: 'a, 'rcx: 'a> {
  49     pub tcx: TyCtxt<'a, 'tcx, 'tcx>,
  50     pub resolver: &'a RefCell<resolve::Resolver<'rcx>>,
  51     /// The stack of module NodeIds up till this point
  52     pub crate_name: Option<String>,
  53     pub cstore: Rc<CStore>,
  54     // Note that external items for which `doc(hidden)` applies to are shown as
  55     // non-reachable while local items aren't. This is because we're reusing
  56     // the access levels from crateanalysis.
  57     /// Later on moved into `html::render::CACHE_KEY`
  58     pub renderinfo: RefCell<RenderInfo>,
  59     /// Later on moved through `clean::Crate` into `html::render::CACHE_KEY`
  60     pub external_traits: Arc<ReentrantMutex<RefCell<FxHashMap<DefId, clean::Trait>>>>,
  61     /// Used while populating `external_traits` to ensure we don't process the same trait twice at
  62     /// the same time.
  63     pub active_extern_traits: RefCell<Vec<DefId>>,
  64     // The current set of type and lifetime substitutions,
  65     // for expanding type aliases at the HIR level:
  66
  67     /// Table type parameter definition -> substituted type
  68     pub ty_substs: RefCell<FxHashMap<Def, clean::Type>>,
  69     /// Table node id of lifetime parameter definition -> substituted lifetime
  70     pub lt_substs: RefCell<FxHashMap<DefId, clean::Lifetime>>,
  71     /// Table DefId of `impl Trait` in argument position -> bounds
  72     pub impl_trait_bounds: RefCell<FxHashMap<DefId, Vec<clean::GenericBound>>>,
  73     pub send_trait: Option<DefId>,
  74     pub fake_def_ids: RefCell<FxHashMap<CrateNum, DefId>>,
  75     pub all_fake_def_ids: RefCell<FxHashSet<DefId>>,
  76     /// Maps (type_id, trait_id) -> auto trait impl
  77     pub generated_synthetics: RefCell<FxHashSet<(DefId, DefId)>>,
  78     pub all_traits: Vec<DefId>,
  79 }
  80
  81 impl<'a, 'tcx, 'rcx> DocContext<'a, 'tcx, 'rcx> {
  82     pub fn sess(&self) -> &session::Session {
  83         &self.tcx.sess
  84     }
  85
  86     /// Call the closure with the given parameters set as
  87     /// the substitutions for a type alias' RHS.
  88     pub fn enter_alias<F, R>(&self,
  89                              ty_substs: FxHashMap<Def, clean::Type>,
  90                              lt_substs: FxHashMap<DefId, clean::Lifetime>,
  91                              f: F) -> R
  92     where F: FnOnce() -> R {
  93         let (old_tys, old_lts) =
  94             (mem::replace(&mut *self.ty_substs.borrow_mut(), ty_substs),
  95              mem::replace(&mut *self.lt_substs.borrow_mut(), lt_substs));
  96         let r = f();
  97         *self.ty_substs.borrow_mut() = old_tys;
  98         *self.lt_substs.borrow_mut() = old_lts;
  99         r
 100     }
 101
 102     // This is an ugly hack, but it's the simplest way to handle synthetic impls without greatly
 103     // refactoring either librustdoc or librustc. In particular, allowing new DefIds to be
 104     // registered after the AST is constructed would require storing the defid mapping in a
 105     // RefCell, decreasing the performance for normal compilation for very little gain.
 106     //
 107     // Instead, we construct 'fake' def ids, which start immediately after the last DefId in
 108     // DefIndexAddressSpace::Low. In the Debug impl for clean::Item, we explicitly check for fake
 109     // def ids, as we'll end up with a panic if we use the DefId Debug impl for fake DefIds
 110     pub fn next_def_id(&self, crate_num: CrateNum) -> DefId {
 111         let start_def_id = {
 112             let next_id = if crate_num == LOCAL_CRATE {
 113                 self.tcx
 114                     .hir()
 115                     .definitions()
 116                     .def_path_table()
 117                     .next_id(DefIndexAddressSpace::Low)
 118             } else {
 119                 self.cstore
 120                     .def_path_table(crate_num)
 121                     .next_id(DefIndexAddressSpace::Low)
 122             };
 123
 124             DefId {
 125                 krate: crate_num,
 126                 index: next_id,
 127             }
 128         };
 129
 130         let mut fake_ids = self.fake_def_ids.borrow_mut();
 131
 132         let def_id = fake_ids.entry(crate_num).or_insert(start_def_id).clone();
 133         fake_ids.insert(
 134             crate_num,
 135             DefId {
 136                 krate: crate_num,
 137                 index: DefIndex::from_array_index(
 138                     def_id.index.as_array_index() + 1,
 139                     def_id.index.address_space(),
 140                 ),
 141             },
 142         );
 143
 144         MAX_DEF_ID.with(|m| {
 145             m.borrow_mut()
 146                 .entry(def_id.krate.clone())
 147                 .or_insert(start_def_id);
 148         });
 149
 150         self.all_fake_def_ids.borrow_mut().insert(def_id);
 151
 152         def_id.clone()
 153     }
 154
 155     /// Like the function of the same name on the HIR map, but skips calling it on fake DefIds.
 156     /// (This avoids a slice-index-out-of-bounds panic.)
 157     pub fn as_local_node_id(&self, def_id: DefId) -> Option<NodeId> {
 158         if self.all_fake_def_ids.borrow().contains(&def_id) {
 159             None
 160         } else {
 161             self.tcx.hir().as_local_node_id(def_id)
 162         }
 163     }
 164
 165     pub fn get_real_ty<F>(&self,
 166                           def_id: DefId,
 167                           def_ctor: &F,
 168                           real_name: &Option<Ident>,
 169                           generics: &ty::Generics,
 170     ) -> hir::Ty
 171     where F: Fn(DefId) -> Def {
 172         let path = get_path_for_type(self.tcx, def_id, def_ctor);
 173         let mut segments = path.segments.into_vec();
 174         let last = segments.pop().expect("segments were empty");
 175
 176         segments.push(hir::PathSegment::new(
 177             real_name.unwrap_or(last.ident),
 178             None,
 179             None,
 180             self.generics_to_path_params(generics.clone()),
 181             false,
 182         ));
 183
 184         let new_path = hir::Path {
 185             span: path.span,
 186             def: path.def,
 187             segments: HirVec::from_vec(segments),
 188         };
 189
 190         hir::Ty {
 191             id: ast::DUMMY_NODE_ID,
 192             node: hir::TyKind::Path(hir::QPath::Resolved(None, P(new_path))),
 193             span: DUMMY_SP,
 194             hir_id: hir::DUMMY_HIR_ID,
 195         }
 196     }
 197
 198     pub fn generics_to_path_params(&self, generics: ty::Generics) -> hir::GenericArgs {
 199         let mut args = vec![];
 200
 201         for param in generics.params.iter() {
 202             match param.kind {
 203                 ty::GenericParamDefKind::Lifetime => {
 204                     let name = if param.name == "" {
 205                         hir::ParamName::Plain(keywords::StaticLifetime.ident())
 206                     } else {
 207                         hir::ParamName::Plain(ast::Ident::from_interned_str(param.name))
 208                     };
 209
 210                     args.push(hir::GenericArg::Lifetime(hir::Lifetime {
 211                         id: ast::DUMMY_NODE_ID,
 212                         span: DUMMY_SP,
 213                         name: hir::LifetimeName::Param(name),
 214                     }));
 215                 }
 216                 ty::GenericParamDefKind::Type {..} => {
 217                     args.push(hir::GenericArg::Type(self.ty_param_to_ty(param.clone())));
 218                 }
 219             }
 220         }
 221
 222         hir::GenericArgs {
 223             args: HirVec::from_vec(args),
 224             bindings: HirVec::new(),
 225             parenthesized: false,
 226         }
 227     }
 228
 229     pub fn ty_param_to_ty(&self, param: ty::GenericParamDef) -> hir::Ty {
 230         debug!("ty_param_to_ty({:?}) {:?}", param, param.def_id);
 231         hir::Ty {
 232             id: ast::DUMMY_NODE_ID,
 233             node: hir::TyKind::Path(hir::QPath::Resolved(
 234                 None,
 235                 P(hir::Path {
 236                     span: DUMMY_SP,
 237                     def: Def::TyParam(param.def_id),
 238                     segments: HirVec::from_vec(vec![
 239                         hir::PathSegment::from_ident(Ident::from_interned_str(param.name))
 240                     ]),
 241                 }),
 242             )),
 243             span: DUMMY_SP,
 244             hir_id: hir::DUMMY_HIR_ID,
 245         }
 246     }
 247 }
 248
 249 pub trait DocAccessLevels {
 250     fn is_doc_reachable(&self, did: DefId) -> bool;
 251 }
 252
 253 impl DocAccessLevels for AccessLevels<DefId> {
 254     fn is_doc_reachable(&self, did: DefId) -> bool {
 255         self.is_public(did)
 256     }
 257 }
 258
 259 /// Creates a new diagnostic `Handler` that can be used to emit warnings and errors.
 260 ///
 261 /// If the given `error_format` is `ErrorOutputType::Json` and no `SourceMap` is given, a new one
 262 /// will be created for the handler.
 263 pub fn new_handler(error_format: ErrorOutputType,
 264                    source_map: Option<Lrc<source_map::SourceMap>>,
 265                    treat_err_as_bug: bool,
 266                    ui_testing: bool,
 267 ) -> errors::Handler {
 268     // rustdoc doesn't override (or allow to override) anything from this that is relevant here, so
 269     // stick to the defaults
 270     let sessopts = Options::default();
 271     let emitter: Box<dyn Emitter + sync::Send> = match error_format {
 272         ErrorOutputType::HumanReadable(color_config) => Box::new(
 273             EmitterWriter::stderr(
 274                 color_config,
 275                 source_map.map(|cm| cm as _),
 276                 false,
 277                 sessopts.debugging_opts.teach,
 278             ).ui_testing(ui_testing)
 279         ),
 280         ErrorOutputType::Json(pretty) => {
 281             let source_map = source_map.unwrap_or_else(
 282                 || Lrc::new(source_map::SourceMap::new(sessopts.file_path_mapping())));
 283             Box::new(
 284                 JsonEmitter::stderr(
 285                     None,
 286                     source_map,
 287                     pretty,
 288                 ).ui_testing(ui_testing)
 289             )
 290         },
 291         ErrorOutputType::Short(color_config) => Box::new(
 292             EmitterWriter::stderr(
 293                 color_config,
 294                 source_map.map(|cm| cm as _),
 295                 true,
 296                 false)
 297         ),
 298     };
 299
 300     errors::Handler::with_emitter_and_flags(
 301         emitter,
 302         errors::HandlerFlags {
 303             can_emit_warnings: true,
 304             treat_err_as_bug,
 305             report_delayed_bugs: false,
 306             external_macro_backtrace: false,
 307             ..Default::default()
 308         },
 309     )
 310 }
 311
 312 pub fn run_core(options: RustdocOptions) -> (clean::Crate, RenderInfo, RenderOptions, Vec<String>) {
 313     // Parse, resolve, and typecheck the given crate.
 314
 315     let RustdocOptions {
 316         input,
 317         crate_name,
 318         error_format,
 319         libs,
 320         externs,
 321         cfgs,
 322         codegen_options,
 323         debugging_options,
 324         target,
 325         edition,
 326         maybe_sysroot,
 327         lint_opts,
 328         describe_lints,
 329         lint_cap,
 330         mut default_passes,
 331         mut manual_passes,
 332         display_warnings,
 333         render_options,
 334         ..
 335     } = options;
 336
 337     let cpath = Some(input.clone());
 338     let input = Input::File(input);
 339
 340     let intra_link_resolution_failure_name = lint::builtin::INTRA_DOC_LINK_RESOLUTION_FAILURE.name;
 341     let warnings_lint_name = lint::builtin::WARNINGS.name;
 342     let missing_docs = rustc_lint::builtin::MISSING_DOCS.name;
 343     let missing_doc_example = rustc_lint::builtin::MISSING_DOC_CODE_EXAMPLES.name;
 344     let private_doc_tests = rustc_lint::builtin::PRIVATE_DOC_TESTS.name;
 345
 346     // In addition to those specific lints, we also need to whitelist those given through
 347     // command line, otherwise they'll get ignored and we don't want that.
 348     let mut whitelisted_lints = vec![warnings_lint_name.to_owned(),
 349                                      intra_link_resolution_failure_name.to_owned(),
 350                                      missing_docs.to_owned(),
 351                                      missing_doc_example.to_owned(),
 352                                      private_doc_tests.to_owned()];
 353
 354     whitelisted_lints.extend(lint_opts.iter().map(|(lint, _)| lint).cloned());
 355
 356     let lints = lint::builtin::HardwiredLints.get_lints()
 357                     .into_iter()
 358                     .chain(rustc_lint::SoftLints.get_lints().into_iter())
 359                     .filter_map(|lint| {
 360                         if lint.name == warnings_lint_name ||
 361                            lint.name == intra_link_resolution_failure_name {
 362                             None
 363                         } else {
 364                             Some((lint.name_lower(), lint::Allow))
 365                         }
 366                     })
 367                     .chain(lint_opts.into_iter())
 368                     .collect::<Vec<_>>();
 369
 370     let host_triple = TargetTriple::from_triple(config::host_triple());
 371     // plays with error output here!
 372     let sessopts = config::Options {
 373         maybe_sysroot,
 374         search_paths: libs,
 375         crate_types: vec![config::CrateType::Rlib],
 376         lint_opts: if !display_warnings {
 377             lints
 378         } else {
 379             vec![]
 380         },
 381         lint_cap: Some(lint_cap.unwrap_or_else(|| lint::Forbid)),
 382         cg: codegen_options,
 383         externs,
 384         target_triple: target.unwrap_or(host_triple),
 385         // Ensure that rustdoc works even if rustc is feature-staged
 386         unstable_features: UnstableFeatures::Allow,
 387         actually_rustdoc: true,
 388         debugging_opts: debugging_options.clone(),
 389         error_format,
 390         edition,
 391         describe_lints,
 392         ..Options::default()
 393     };
 394     driver::spawn_thread_pool(sessopts, move |sessopts| {
 395         let source_map = Lrc::new(source_map::SourceMap::new(sessopts.file_path_mapping()));
 396         let diagnostic_handler = new_handler(error_format,
 397                                              Some(source_map.clone()),
 398                                              debugging_options.treat_err_as_bug,
 399                                              debugging_options.ui_testing);
 400
 401         let mut sess = session::build_session_(
 402             sessopts, cpath, diagnostic_handler, source_map,
 403         );
 404
 405         lint::builtin::HardwiredLints.get_lints()
 406                                      .into_iter()
 407                                      .chain(rustc_lint::SoftLints.get_lints().into_iter())
 408                                      .filter_map(|lint| {
 409                                          // We don't want to whitelist *all* lints so let's
 410                                          // ignore those ones.
 411                                          if whitelisted_lints.iter().any(|l| &lint.name == l) {
 412                                              None
 413                                          } else {
 414                                              Some(lint)
 415                                          }
 416                                      })
 417                                      .for_each(|l| {
 418                                          sess.driver_lint_caps.insert(lint::LintId::of(l),
 419                                                                       lint::Allow);
 420                                      });
 421
 422         let codegen_backend = rustc_driver::get_codegen_backend(&sess);
 423         let cstore = Rc::new(CStore::new(codegen_backend.metadata_loader()));
 424         rustc_lint::register_builtins(&mut sess.lint_store.borrow_mut(), Some(&sess));
 425
 426         let mut cfg = config::build_configuration(&sess, config::parse_cfgspecs(cfgs));
 427         target_features::add_configuration(&mut cfg, &sess, &*codegen_backend);
 428         sess.parse_sess.config = cfg;
 429
 430         let control = &driver::CompileController::basic();
 431
 432         let krate = match driver::phase_1_parse_input(control, &sess, &input) {
 433             Ok(krate) => krate,
 434             Err(mut e) => {
 435                 e.emit();
 436                 FatalError.raise();
 437             }
 438         };
 439
 440         let name = match crate_name {
 441             Some(ref crate_name) => crate_name.clone(),
 442             None => ::rustc_codegen_utils::link::find_crate_name(Some(&sess), &krate.attrs, &input),
 443         };
 444
 445         let mut crate_loader = CrateLoader::new(&sess, &cstore, &name);
 446
 447         let resolver_arenas = resolve::Resolver::arenas();
 448         let result = driver::phase_2_configure_and_expand_inner(&sess,
 449                                                         &cstore,
 450                                                         krate,
 451                                                         None,
 452                                                         &name,
 453                                                         None,
 454                                                         resolve::MakeGlobMap::No,
 455                                                         &resolver_arenas,
 456                                                         &mut crate_loader,
 457                                                         |_| Ok(()));
 458         let driver::InnerExpansionResult {
 459             mut hir_forest,
 460             resolver,
 461             ..
 462         } = abort_on_err(result, &sess);
 463
 464         // We need to hold on to the complete resolver, so we clone everything
 465         // for the analysis passes to use. Suboptimal, but necessary in the
 466         // current architecture.
 467         let defs = resolver.definitions.clone();
 468         let resolutions = ty::Resolutions {
 469             freevars: resolver.freevars.clone(),
 470             export_map: resolver.export_map.clone(),
 471             trait_map: resolver.trait_map.clone(),
 472             maybe_unused_trait_imports: resolver.maybe_unused_trait_imports.clone(),
 473             maybe_unused_extern_crates: resolver.maybe_unused_extern_crates.clone(),
 474             extern_prelude: resolver.extern_prelude.iter().map(|(ident, entry)| {
 475                 (ident.name, entry.introduced_by_item)
 476             }).collect(),
 477         };
 478         let analysis = ty::CrateAnalysis {
 479             glob_map: if resolver.make_glob_map { Some(resolver.glob_map.clone()) } else { None },
 480         };
 481
 482         let mut arenas = AllArenas::new();
 483         let hir_map = hir_map::map_crate(&sess, &*cstore, &mut hir_forest, &defs);
 484         let output_filenames = driver::build_output_filenames(&input,
 485                                                             &None,
 486                                                             &None,
 487                                                             &[],
 488                                                             &sess);
 489
 490         let resolver = RefCell::new(resolver);
 491         abort_on_err(driver::phase_3_run_analysis_passes(&*codegen_backend,
 492                                                         control,
 493                                                         &sess,
 494                                                         &*cstore,
 495                                                         hir_map,
 496                                                         analysis,
 497                                                         resolutions,
 498                                                         &mut arenas,
 499                                                         &name,
 500                                                         &output_filenames,
 501                                                         |tcx, _, _, result| {
 502             if result.is_err() {
 503                 sess.fatal("Compilation failed, aborting rustdoc");
 504             }
 505
 506             let access_levels = tcx.privacy_access_levels(LOCAL_CRATE);
 507
 508             // Convert from a NodeId set to a DefId set since we don't always have easy access
 509             // to the map from defid -> nodeid
 510             let access_levels = AccessLevels {
 511                 map: access_levels.map.iter()
 512                                     .map(|(&k, &v)| (tcx.hir().local_def_id(k), v))
 513                                     .collect()
 514             };
 515
 516             let send_trait = if crate_name == Some("core".to_string()) {
 517                 clean::path_to_def_local(&tcx, &["marker", "Send"])
 518             } else {
 519                 clean::path_to_def(&tcx, &["core", "marker", "Send"])
 520             };
 521
 522             let mut renderinfo = RenderInfo::default();
 523             renderinfo.access_levels = access_levels;
 524
 525             let ctxt = DocContext {
 526                 tcx,
 527                 resolver: &resolver,
 528                 crate_name,
 529                 cstore: cstore.clone(),
 530                 external_traits: Default::default(),
 531                 active_extern_traits: Default::default(),
 532                 renderinfo: RefCell::new(renderinfo),
 533                 ty_substs: Default::default(),
 534                 lt_substs: Default::default(),
 535                 impl_trait_bounds: Default::default(),
 536                 send_trait: send_trait,
 537                 fake_def_ids: Default::default(),
 538                 all_fake_def_ids: Default::default(),
 539                 generated_synthetics: Default::default(),
 540                 all_traits: tcx.all_traits(LOCAL_CRATE).to_vec(),
 541             };
 542             debug!("crate: {:?}", tcx.hir().krate());
 543
 544             let mut krate = {
 545                 let mut v = RustdocVisitor::new(&ctxt);
 546                 v.visit(tcx.hir().krate());
 547                 v.clean(&ctxt)
 548             };
 549
 550             fn report_deprecated_attr(name: &str, diag: &errors::Handler) {
 551                 let mut msg = diag.struct_warn(&format!("the `#![doc({})]` attribute is \
 552                                                          considered deprecated", name));
 553                 msg.warn("please see https://github.com/rust-lang/rust/issues/44136");
 554
 555                 if name == "no_default_passes" {
 556                     msg.help("you may want to use `#![doc(document_private_items)]`");
 557                 }
 558
 559                 msg.emit();
 560             }
 561
 562             // Process all of the crate attributes, extracting plugin metadata along
 563             // with the passes which we are supposed to run.
 564             for attr in krate.module.as_ref().unwrap().attrs.lists("doc") {
 565                 let diag = ctxt.sess().diagnostic();
 566
 567                 let name = attr.name().map(|s| s.as_str());
 568                 let name = name.as_ref().map(|s| &s[..]);
 569                 if attr.is_word() {
 570                     if name == Some("no_default_passes") {
 571                         report_deprecated_attr("no_default_passes", diag);
 572                         if default_passes == passes::DefaultPassOption::Default {
 573                             default_passes = passes::DefaultPassOption::None;
 574                         }
 575                     }
 576                 } else if let Some(value) = attr.value_str() {
 577                     let sink = match name {
 578                         Some("passes") => {
 579                             report_deprecated_attr("passes = \"...\"", diag);
 580                             &mut manual_passes
 581                         },
 582                         Some("plugins") => {
 583                             report_deprecated_attr("plugins = \"...\"", diag);
 584                             eprintln!("WARNING: #![doc(plugins = \"...\")] no longer functions; \
 585                                       see CVE-2018-1000622");
 586                             continue
 587                         },
 588                         _ => continue,
 589                     };
 590                     for p in value.as_str().split_whitespace() {
 591                         sink.push(p.to_string());
 592                     }
 593                 }
 594
 595                 if attr.is_word() && name == Some("document_private_items") {
 596                     if default_passes == passes::DefaultPassOption::Default {
 597                         default_passes = passes::DefaultPassOption::Private;
 598                     }
 599                 }
 600             }
 601
 602             let mut passes: Vec<String> =
 603                 passes::defaults(default_passes).iter().map(|p| p.to_string()).collect();
 604             passes.extend(manual_passes);
 605
 606             for pass in &passes {
 607                 // the "unknown pass" error will be reported when late passes are run
 608                 if let Some(pass) = passes::find_pass(pass).and_then(|p| p.early_fn()) {
 609                     krate = pass(krate, &ctxt);
 610                 }
 611             }
 612
 613             ctxt.sess().abort_if_errors();
 614
 615             (krate, ctxt.renderinfo.into_inner(), render_options, passes)
 616         }), &sess)
 617     })
 618 }