Closed
Description
Apparently, desugar_doc tries to call strip_doc_comment_decoration to convert to "desugar" a comment that was not "sugared" in the first place.
Test case:
This bug is not triggered if the comment is moved to the crate top-level (rather than a module), or when running rustdoc on a.rs directly
a.rs
pub mod a { #![doc = "Test"] }b.rs
extern crate a;Build commands and output:
$ rustc --crate-type lib a.rs
$ RUST_BACKTRACE=1 rustdoc b.rs -L .
task '<unnamed>' failed at 'not a doc-comment: Test', /home/rustbuild/src/rust-buildbot/slave/nightly-linux/build/src/libsyntax/ast_util.rs:784
stack backtrace:
1: 0x7f698a7645f0 - rt::backtrace::imp::write::h196d0788fd5af7e2J7p
2: 0x7f698a7678f0 - failure::on_fail::h19a8129d7de62dbfYsq
3: 0x7f698f60b3f0 - unwind::begin_unwind_inner::h7290ff1071e375d5VTd
4: 0x7f698f60b070 - unwind::begin_unwind_fmt::hf1eab6137b01c57f4Qd
5: 0x7f698b2f4bc0 - parse::lexer::comments::strip_doc_comment_decoration::h52bebd21516a3103KnF
6: 0x7f698b2f4560 - attr::Attribute.AttributeMethods::desugar_doc::h7a442bdc81fe475ah5z
7: 0x7f698fbbb160 - clean::ast..Attribute.Clean<Attribute>::clean::hd76d78f14d0f290auLb
8: 0x7f698fbbafa0 - clean::inline::load_attrs::closure.$x22closure$x22$LP$20267$RP$
9: 0x7f698fbb97b0 - clean::inline::load_attrs::closure.$x22closure$x22$LP$20195$RP$
10: 0x7f698e764110 - metadata::decoder::get_item_attrs::h77c4d1d788ecba74Ucs
11: 0x7f698e34c5e0 - metadata::csearch::get_item_attrs::hb646accdef04951coju
12: 0x7f698fbdad10 - clean::cstore..crate_metadata.Clean<ExternalCrate>::clean::closure.$x22closure$x22$LP$22274$RP$
13: 0x7f698e75a480 - metadata::decoder::each_child_of_item_or_crate::closure.$x22closure$x22$LP$132187$RP$
14: 0x7f698af4acf0 - ebml::reader::tagged_docs::h21531a795db2c3e7Bif
15: 0x7f698e75a160 - metadata::decoder::each_child_of_item_or_crate::h1c9197ded6464680IFr
16: 0x7f698e75bf00 - metadata::decoder::each_top_level_item_of_crate::hfac63c9cf5ae2ee3PNr
17: 0x7f698e20db70 - metadata::csearch::each_top_level_item_of_crate::hc7c15deef877aab6Nau
18: 0x7f698fbd7cf0 - clean::cstore..crate_metadata.Clean<ExternalCrate>::clean::heb2e784f535b3f79YMa
19: 0x7f698fbd7a50 - clean::visit_ast..RustdocVisitor<'a>.Clean<Crate>::clean::closure.$x22closure$x22$LP$22227$RP$
20: 0x7f698e164a20 - metadata::cstore::CStore::iter_crate_data::h3d5af457708f90c8TUt
21: 0x7f698fbd6870 - clean::visit_ast..RustdocVisitor<'a>.Clean<Crate>::clean::h70c51df18eff4f69HEa
22: 0x7f698fc27190 - core::run_core::hebd872ca8878a181wJh
23: 0x7f698fcf7250 - rust_input::closure.$x22closure$x22$LP$29353$RP$
24: 0x7f698fcee460 - task::TaskBuilder<S>::try_future::closure.$x22closure$x22$LP$29159$RP$
25: 0x7f698f95d750 - task::spawn_opts::closure.$x22closure$x22$LP$8216$RP$
26: 0x7f698f6622c0 - rust_try
27: 0x7f698f6086d0 - unwind::try::hc5b79cf0d453a48a0Hd
28: 0x7f698f608430 - task::Task::run::h573b47a3c64dd74bQSc
29: 0x7f698f95d540 - task::spawn_opts::closure.$x22closure$x22$LP$8162$RP$
30: 0x7f698f60a4a0 - thread::thread_start::hcb4d88eeb2fea24bUfd
31: 0x7f698a208060 - start_thread
32: 0x7f698f2e0489 - __clone
33: 0x0 - <unknown>
task '<main>' failed at 'called `Result::unwrap()` on an `Err` value: Box<core::any::Any:Send>', /home/rustbuild/src/rust-buildbot/slave/nightly-linux/build/src/libcore/result.rs:548
stack backtrace:
1: 0x7f698a7645f0 - rt::backtrace::imp::write::h196d0788fd5af7e2J7p
2: 0x7f698a7678f0 - failure::on_fail::h19a8129d7de62dbfYsq
3: 0x7f698f60b3f0 - unwind::begin_unwind_inner::h7290ff1071e375d5VTd
4: 0x7f698f60b070 - unwind::begin_unwind_fmt::hf1eab6137b01c57f4Qd
5: 0x7f698f60b030 - rust_begin_unwind
6: 0x7f698f64ead0 - failure::begin_unwind::h39adb6de70d2239e5Wj
7: 0x7f698fcdd810 - rust_input::h265dda0f703d2e9cxxt
8: 0x7f698fcd24b0 - main_args::h70b9b0a493223a01o7s
9: 0x7f698fcd2390 - main::h5520cb0cd7bfd3c851s
10: 0x7f698f95de50 - start::closure.$x22closure$x22$LP$8280$RP$
11: 0x7f698f6622c0 - rust_try
12: 0x7f698f6086d0 - unwind::try::hc5b79cf0d453a48a0Hd
13: 0x7f698f608430 - task::Task::run::h573b47a3c64dd74bQSc
14: 0x7f698f95db00 - start::h9f770763fd166b762ke
15: 0x7f698f95da70 - lang_start::hcbacf09ceac44709mke
16: 0x7f698f216f10 - __libc_start_main
17: 0x0 - <unknown>