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