rustdoc panics on openssl

[o01eg]

When I trying to document project I gets ICE in rustdoc:

 Documenting openssl v0.9.24
thread 'rustc' panicked at 'Unexpected type DefId(14/0:31 ~ libc[ad41]::c_int[0])', librustdoc/clean/auto_trait.rs:29:18
stack backtrace:
   0: std::sys::unix::backtrace::tracing::imp::unwind_backtrace
             at libstd/sys/unix/backtrace/tracing/gcc_s.rs:49
   1: std::sys_common::backtrace::_print
             at libstd/sys_common/backtrace.rs:71
   2: std::panicking::default_hook::{{closure}}
             at libstd/sys_common/backtrace.rs:59
             at libstd/panicking.rs:206
   3: std::panicking::default_hook
             at libstd/panicking.rs:222
   4: std::panicking::rust_panic_with_hook
             at libstd/panicking.rs:400
   5: std::panicking::begin_panic_fmt
             at libstd/panicking.rs:347
   6: rustdoc::clean::get_auto_traits_with_def_id
             at librustdoc/clean/auto_trait.rs:29
             at librustdoc/clean/mod.rs:3372
   7: rustdoc::clean::inline::build_impls
             at librustdoc/clean/inline.rs:246
   8: rustdoc::clean::build_deref_target_impls
             at librustdoc/clean/mod.rs:3431
   9: <rustdoc::doctree::Impl as rustdoc::clean::Clean<alloc::vec::Vec<rustdoc::clean::Item>>>::clean
             at librustdoc/clean/mod.rs:3384
  10: <rustdoc::doctree::Module as rustdoc::clean::Clean<rustdoc::clean::Item>>::clean
             at librustdoc/clean/mod.rs:541
             at /checkout/src/libcore/ops/function.rs:271
             at /checkout/src/libcore/option.rs:404
             at /checkout/src/libcore/iter/mod.rs:2448
             at /checkout/src/liballoc/vec.rs:1906
             at /checkout/src/liballoc/vec.rs:1803
             at /checkout/src/liballoc/vec.rs:1767
             at librustdoc/clean/mod.rs:541
  11: <alloc::vec::Vec<T> as alloc::vec::SpecExtend<T, I>>::spec_extend
             at librustdoc/clean/mod.rs:536
             at /checkout/src/libcore/ops/function.rs:271
             at /checkout/src/libcore/option.rs:404
             at /checkout/src/libcore/iter/mod.rs:1311
             at /checkout/src/liballoc/vec.rs:1829
  12: <rustdoc::doctree::Module as rustdoc::clean::Clean<rustdoc::clean::Item>>::clean
             at /checkout/src/liballoc/vec.rs:1767
             at librustdoc/clean/mod.rs:536
  13: <rustdoc::visit_ast::RustdocVisitor<'a, 'tcx, 'rcx> as rustdoc::clean::Clean<rustdoc::clean::Crate>>::clean
             at librustdoc/clean/mod.rs:166
  14: rustdoc::core::run_core::{{closure}}
             at librustdoc/core.rs:270
  15: rustc::ty::context::TyCtxt::create_and_enter
             at /checkout/src/librustc_driver/driver.rs:1094
             at /checkout/src/librustc/ty/context.rs:1573
             at /checkout/src/libstd/thread/local.rs:377
             at /checkout/src/libstd/thread/local.rs:288
             at /checkout/src/librustc/ty/context.rs:1570
             at /checkout/src/librustc/ty/context.rs:1557
             at /checkout/src/libstd/thread/local.rs:377
             at /checkout/src/libstd/thread/local.rs:288
             at /checkout/src/librustc/ty/context.rs:1554
             at /checkout/src/librustc/ty/context.rs:1197
  16: rustdoc::core::run_core
             at /checkout/src/librustc_driver/driver.rs:1007
             at librustdoc/core.rs:217

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 1.26.0-dev (b0a8620ed 2018-02-24) running on x86_64-unknown-linux-gnu

error: Could not document `openssl`.

Compiler version:

$ rustc --verbose --version
rustc 1.26.0-dev (b0a8620ed 2018-02-24)
binary: rustc
commit-hash: b0a8620ed639d5085d7e1cca3626681a6e4e328e
commit-date: 2018-02-24
host: x86_64-unknown-linux-gnu
release: 1.26.0-dev
LLVM version: 6.0

Compilation finishes without issues.

[pietroalbini]

Reproduced this with openssl version 0.9.24 (doesn't reproduce on the latest version) on nightly: beta or stable are not affected. Also updated the issue description with the full stack trace.

If this can be relevant, beta and stable are reporting a bunch of pullmark warnings, and this error:

error: unknown start of token: `
  --> <stdin>:12:2
   |
12 | [`BIGNUM`]: https://wiki.openssl.org/index.php/Manual:Bn_internal(3)
   |  ^
   |
help: unicode character '`' (Grave Accent) looks like ''' (Single Quote), but it's not
  --> <stdin>:12:2
   |
12 | [`BIGNUM`]: https://wiki.openssl.org/index.php/Manual:Bn_internal(3)
   |  ^

[GuillaumeGomez]

I think it's the same issue than #48463.

[frewsxcv]

confirmed this is fixed in the latest nightly

---

reproducing the issue with nightly-2018-02-23:

rustc 1.26.0-nightly (063deba92 2018-02-23)
binary: rustc
commit-hash: 063deba92e44809125a433ca6e6c1ad0993313bf
commit-date: 2018-02-23
host: x86_64-apple-darwin
release: 1.26.0-nightly
LLVM version: 6.0

 Documenting openssl v0.9.4 (file:///Users/corey/dev/rust-openssl/openssl)
thread 'rustc' panicked at 'Unexpected type DefId(12/0:31 ~ libc[93ed]::c_int[0])', librustdoc/clean/auto_trait.rs:29:18
note: Run with `RUST_BACKTRACE=1` for 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 1.26.0-nightly (063deba92 2018-02-23) running on x86_64-apple-darwin

error: Could not document `openssl`.

Caused by:
  process didn't exit successfully: `rustdoc --crate-name openssl openssl/src/lib.rs -o /Users/corey/dev/rust-openssl/target/doc -L dependency=/Users/corey/dev/rust-openssl/target/debug/deps --extern openssl_sys=/Users/corey/dev/rust-openssl/target/debug/deps/libopenssl_sys-fc712bbb2e091aa2.rlib --extern bitflags=/Users/corey/dev/rust-openssl/target/debug/deps/libbitflags-c3841cf086926ed6.rlib --extern lazy_static=/Users/corey/dev/rust-openssl/target/debug/deps/liblazy_static-27d6f4600a73ac55.rlib --extern libc=/Users/corey/dev/rust-openssl/target/debug/deps/liblibc-c4a029400d8b931b.rlib --cfg ossl110 --cfg osslconf="OPENSSL_NO_MD2" --cfg osslconf="OPENSSL_NO_RC5" --cfg osslconf="OPENSSL_THREADS" --cfg osslconf="OPENSSL_NO_ASAN" --cfg osslconf="OPENSSL_NO_CRYPTO_MDEBUG" --cfg osslconf="OPENSSL_NO_CRYPTO_MDEBUG_BACKTRACE" --cfg osslconf="OPENSSL_NO_EGD" --cfg osslconf="OPENSSL_NO_FUZZ_AFL" --cfg osslconf="OPENSSL_NO_FUZZ_LIBFUZZER" --cfg osslconf="OPENSSL_NO_HEARTBEATS" --cfg osslconf="OPENSSL_NO_MSAN" --cfg osslconf="OPENSSL_NO_SCTP" --cfg osslconf="OPENSSL_NO_SSL_TRACE" --cfg osslconf="OPENSSL_NO_SSL3" --cfg osslconf="OPENSSL_NO_SSL3_METHOD" --cfg osslconf="OPENSSL_NO_UBSAN" --cfg osslconf="OPENSSL_NO_UNIT_TEST" --cfg osslconf="OPENSSL_NO_WEAK_SSL_CIPHERS" --cfg osslconf="OPENSSL_NO_AFALGENG" --cfg osslconf="OPENSSL_CPUID_OBJ"` (exit code: 101)

---

confirming the issue is fixed with nightly-2018-03-25:

rustc 1.26.0-nightly (482a913fb 2018-03-25)
binary: rustc
commit-hash: 482a913fb337855072a53c0d602cd19947f45285
commit-date: 2018-03-25
host: x86_64-apple-darwin
release: 1.26.0-nightly
LLVM version: 6.0

 Documenting openssl v0.9.4 (file:///Users/corey/dev/rust-openssl/openssl)
    Finished dev [unoptimized + debuginfo] target(s) in 16.60 secs