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Description
openedon Mar 16, 2020
As of rustc 1.43.0-nightly (45ebd58 2020-03-15) the Travis CI builds of https://github.com/cloudflare/quiche are failing due to rustc crashing. The crash happens when building the docopt crate, which is a dependency of one of quiche's subcrates.
Unfortunately I wasn't able to reproduce this locally, so I can't try the latest master or try to prepare a minimal reproducer, but I can reproduce this realiably on Travis CI, see e.g.
https://travis-ci.com/github/cloudflare/quiche/jobs/298502269
https://travis-ci.com/github/cloudflare/quiche/jobs/298521787
https://travis-ci.com/github/cloudflare/quiche/jobs/298536148
https://travis-ci.com/github/cloudflare/quiche/jobs/298535326
Could this have something to do with Travis CI specifically?
Code
As per above, I don't have specific code that reproduces this. I can only reproduce when building the docopt crate as part of quiche on Travis CI.
Meta
rustc --version --verbose:
rustc 1.43.0-nightly (45ebd5808 2020-03-15)
Error output
Compiling docopt v1.1.0
Running `rustc --crate-name docopt --edition=2018 /home/travis/.cargo/registry/src/github.com-1ecc6299db9ec823/docopt-1.1.0/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --crate-type lib --emit=dep-info,metadata,link -C debuginfo=2 -C metadata=60637fd07855c546 -C extra-filename=-60637fd07855c546 --out-dir /home/travis/build/cloudflare/quiche/tools/apps/target/debug/deps -L dependency=/home/travis/build/cloudflare/quiche/tools/apps/target/debug/deps --extern lazy_static=/home/travis/build/cloudflare/quiche/tools/apps/target/debug/deps/liblazy_static-9097ff8143d19ca4.rmeta --extern regex=/home/travis/build/cloudflare/quiche/tools/apps/target/debug/deps/libregex-e22dcf23ec571abd.rmeta --extern serde=/home/travis/build/cloudflare/quiche/tools/apps/target/debug/deps/libserde-4039d5b385e0dfe9.rmeta --extern strsim=/home/travis/build/cloudflare/quiche/tools/apps/target/debug/deps/libstrsim-161e6c2eb076d56e.rmeta --cap-lints allow -D warnings`
thread 'rustc' panicked at 'called `Option::unwrap()` on a `None` value', src/librustc/hir/mod.rs:81:37
Backtrace
thread 'rustc' panicked at 'called `Option::unwrap()` on a `None` value', src/librustc/hir/mod.rs:81:37
stack backtrace:
0: backtrace::backtrace::libunwind::trace
at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.44/src/backtrace/libunwind.rs:86
1: backtrace::backtrace::trace_unsynchronized
at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.44/src/backtrace/mod.rs:66
2: std::sys_common::backtrace::_print_fmt
at src/libstd/sys_common/backtrace.rs:78
3: <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt
at src/libstd/sys_common/backtrace.rs:59
4: core::fmt::write
at src/libcore/fmt/mod.rs:1069
5: std::io::Write::write_fmt
at src/libstd/io/mod.rs:1427
6: std::sys_common::backtrace::_print
at src/libstd/sys_common/backtrace.rs:62
7: std::sys_common::backtrace::print
at src/libstd/sys_common/backtrace.rs:49
8: std::panicking::default_hook::{{closure}}
at src/libstd/panicking.rs:198
9: std::panicking::default_hook
at src/libstd/panicking.rs:218
10: rustc_driver::report_ice
11: std::panicking::rust_panic_with_hook
at src/libstd/panicking.rs:513
12: rust_begin_unwind
at src/libstd/panicking.rs:417
13: core::panicking::panic_fmt
at src/libcore/panicking.rs:111
14: core::panicking::panic
at src/libcore/panicking.rs:54
15: core::ops::function::FnOnce::call_once
16: rustc::ty::query::<impl rustc::ty::query::config::QueryAccessors for rustc::ty::query::queries::hir_owner>::compute
17: rustc::dep_graph::graph::DepGraph::with_task_impl
18: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt>::get_query
19: rustc::hir::map::Map::get_entry
20: rustc::hir::map::Map::find
21: rustc_passes::dead::MarkSymbolVisitor::check_def_id
22: rustc_hir::intravisit::walk_item
23: rustc_passes::dead::check_crate
24: rustc_session::utils::<impl rustc_session::session::Session>::time
25: rustc_interface::passes::analysis::{{closure}}::{{closure}}
26: rustc_session::utils::<impl rustc_session::session::Session>::time
27: rustc_interface::passes::analysis
28: rustc::ty::query::__query_compute::analysis
29: rustc::dep_graph::graph::DepGraph::with_task_impl
30: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt>::get_query
31: rustc::ty::context::tls::enter_global
32: rustc_interface::interface::run_compiler_in_existing_thread_pool
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
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Area: The high-level intermediate representation (HIR)Category: This is a bug.Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️Helping to "clean up" bugs with minimal examples and bisectionsHigh priorityRelevant to the compiler team, which will review and decide on the PR/issue.Performance or correctness regression from stable to nightly.