❯ rustc --version rustc 1.33.0-nightly (4c2be9c97 2019-01-22) 

warning: unused import: `std::str::FromStr` --> src/schema.rs:8:5 | 8 | use std::str::FromStr; | ^^^^^^^^^^^^^^^^^ | = note: #[warn(unused_imports)] on by default INFO 2019-01-30T18:23:41Z: rustc::traits::fulfill: selecting trait `Binder(TraitPredicate(<proc_macro2::Ident as std::convert::AsRef<str>>))` at depth 0 yielded Err error: internal compiler error: src/librustc_typeck/check/_match.rs:795: unexpected pattern definition: VariantCtor(DefId(0/1:1359 ~ xmlschemer[e672]::schema[0]::SchemaBody[0]::Group[0]), Fn) thread 'rustc' panicked at 'Box<Any>', src/librustc_errors/lib.rs:589:9 note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace. stack backtrace: 0: std::sys::unix::backtrace::tracing::imp::unwind_backtrace 1: std::sys_common::backtrace::_print 2: std::panicking::default_hook::{{closure}} 3: std::panicking::default_hook 4: rustc::util::common::panic_hook 5: std::panicking::rust_panic_with_hook 6: std::panicking::begin_panic 7: rustc_errors::Handler::bug 8: rustc::util::bug::opt_span_bug_fmt::{{closure}} 9: rustc::ty::context::tls::with_opt::{{closure}} 10: rustc::ty::context::tls::with_context_opt 11: rustc::ty::context::tls::with_opt 12: rustc::util::bug::opt_span_bug_fmt 13: rustc::util::bug::bug_fmt 14: rustc_typeck::check::_match::<impl rustc_typeck::check::FnCtxt<'a, 'gcx, 'tcx>>::check_pat_walk 15: <core::iter::Map<I, F> as core::iter::iterator::Iterator>::fold 16: <alloc::vec::Vec<T> as alloc::vec::SpecExtend<T, I>>::from_iter 17: rustc_typeck::check::_match::<impl rustc_typeck::check::FnCtxt<'a, 'gcx, 'tcx>>::check_match 18: rustc_typeck::check::FnCtxt::check_expr_kind 19: rustc_typeck::check::FnCtxt::check_expr_with_expectation_and_needs 20: rustc_typeck::check::FnCtxt::check_decl_initializer 21: rustc_typeck::check::FnCtxt::check_decl_local 22: rustc_typeck::check::FnCtxt::check_stmt 23: rustc_typeck::check::FnCtxt::check_block_with_expected 24: rustc_typeck::check::FnCtxt::check_expr_kind 25: rustc_typeck::check::FnCtxt::check_expr_with_expectation_and_needs 26: rustc_typeck::check::FnCtxt::check_return_expr 27: rustc_typeck::check::check_fn 28: rustc::ty::context::GlobalCtxt::enter_local 29: rustc_typeck::check::typeck_tables_of 30: rustc::ty::query::<impl rustc::ty::query::config::QueryAccessors<'tcx> for rustc::ty::query::queries::typeck_tables_of<'tcx>>::compute 31: rustc::dep_graph::graph::DepGraph::with_task_impl 32: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt<'a, 'gcx, 'tcx>>::try_get_with 33: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt<'a, 'gcx, 'tcx>>::ensure_query 34: rustc::session::Session::track_errors 35: rustc_typeck::check::typeck_item_bodies 36: rustc::ty::query::__query_compute::typeck_item_bodies 37: rustc::ty::query::<impl rustc::ty::query::config::QueryAccessors<'tcx> for rustc::ty::query::queries::typeck_item_bodies<'tcx>>::compute 38: rustc::dep_graph::graph::DepGraph::with_task_impl 39: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt<'a, 'gcx, 'tcx>>::try_get_with 40: rustc::util::common::time 41: rustc_typeck::check_crate 42: <std::thread::local::LocalKey<T>>::with 43: rustc::ty::context::TyCtxt::create_and_enter 44: rustc_driver::driver::compile_input 45: <scoped_tls::ScopedKey<T>>::set 46: rustc_driver::run_compiler 47: <scoped_tls::ScopedKey<T>>::set query stack during panic: #0 [typeck_tables_of] processing `<schema::SchemaBody as schema::CodeGenerator>::codegen` #1 [typeck_item_bodies] type-checking all item bodies end of query stack error: aborting due to previous error 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 1.33.0-nightly (4c2be9c97 2019-01-22) running on x86_64-apple-darwin note: compiler flags: -C debuginfo=2 -C incremental --crate-type lib note: some of the compiler flags provided by cargo are hidden [2019-01-30T18:23:42Z INFO cargo::core::compiler::job_queue] end: xmlschemer v0.1.0 (/Users/evan/rust/xmlschemer) => Target(lib)/Profile(dev) => Host [2019-01-30T18:23:42Z DEBUG cargo] exit_with_error; err=CliError { error: Some(ProcessError { desc: "process didn\'t exit successfully: `rustc --edition=2018 --crate-name xmlschemer src/lib.rs --color always --crate-type lib --emit=dep-info,link -C debuginfo=2 -C metadata=9bdca844f3332aaa -C extra-filename=-9bdca844f3332aaa --out-dir /Users/evan/rust/xmlschemer/target/debug/deps -C incremental=/Users/evan/rust/xmlschemer/target/debug/incremental -L dependency=/Users/evan/rust/xmlschemer/target/debug/deps --extern clap=/Users/evan/rust/xmlschemer/target/debug/deps/libclap-a23f3ee74267101d.rlib --extern heck=/Users/evan/rust/xmlschemer/target/debug/deps/libheck-563b7994f02e64e3.rlib --extern if_chain=/Users/evan/rust/xmlschemer/target/debug/deps/libif_chain-6aadb789477ede7c.rlib --extern log=/Users/evan/rust/xmlschemer/target/debug/deps/liblog-45ef69e8215812e9.rlib --extern pretty_env_logger=/Users/evan/rust/xmlschemer/target/debug/deps/libpretty_env_logger-37685c937e93e60a.rlib --extern proc_macro2=/Users/evan/rust/xmlschemer/target/debug/deps/libproc_macro2-17e36e282c84be40.rlib --extern quote=/Users/evan/rust/xmlschemer/target/debug/deps/libquote-af4db6a3f849bcbe.rlib --extern rustfmt_nightly=/Users/evan/rust/xmlschemer/target/debug/deps/librustfmt_nightly-5cf5c0282729abd2.rlib --extern serde=/Users/evan/rust/xmlschemer/target/debug/deps/libserde-8e6194039e047282.rlib --extern serde_xml_rs=/Users/evan/rust/xmlschemer/target/debug/deps/libserde_xml_rs-f084d2902482aeaf.rlib --extern serde_derive=/Users/evan/rust/xmlschemer/target/debug/deps/libserde_derive-e37160e203f98c35.dylib --extern syn=/Users/evan/rust/xmlschemer/target/debug/deps/libsyn-2bf5c4461ccaa30c.rlib --extern xml=/Users/evan/rust/xmlschemer/target/debug/deps/libxml-b8b441b14c916eaf.rlib` (exit code: 101)", exit: Some(ExitStatus(ExitStatus(25856))), output: None } stack backtrace: 0: failure::backtrace::internal::InternalBacktrace::new::h474badb9ffce7bc7 (0x103b16f3b) 1: <failure::backtrace::Backtrace as core::default::Default>::default::h45cb1f41e3daf8ec (0x103b17114) 2: cargo::util::process_builder::ProcessBuilder::exec_with_streaming::h921b193535c0e9ef (0x1034fb6f5) 3: <cargo::core::compiler::DefaultExecutor as cargo::core::compiler::Executor>::exec_and_capture_output::hf0dfafb1f405e584 (0x103732873) 4: <F as cargo::core::compiler::job::FnBox<A, R>>::call_box::hd5b96495299b4cd2 (0x103730700) 5: <F as cargo::core::compiler::job::FnBox<A, R>>::call_box::h05bcb4a6b3baee91 (0x103519d99) 6: <F as cargo::core::compiler::job::FnBox<A, R>>::call_box::h05bcb4a6b3baee91 (0x103519d99) 7: cargo::core::compiler::job::Job::run::h61355f8d9cb1d572 (0x103519e6e) 8: crossbeam_utils::thread::ScopedThreadBuilder::spawn::{{closure}}::h8f338d85344a6ba7 (0x10374aed9) 9: std::sys_common::backtrace::__rust_begin_short_backtrace::ha3ba31f6b7a9d297 (0x1034125fd) 10: ___rust_maybe_catch_panic (0x103b3d7fe) 11: <F as alloc::boxed::FnBox<A>>::call_box::hda9b9217608f805a (0x10341c889) 12: std::sys::unix::thread::Thread::new::thread_start::h9fabc538beb0d7ac (0x103b3cdcb) 13: __pthread_body (0x7fff78fc033c) 14: __pthread_start (0x7fff78fc32a6) stack backtrace: 0: failure::backtrace::internal::InternalBacktrace::new::h474badb9ffce7bc7 (0x103b16f3b) 1: <failure::backtrace::Backtrace as core::default::Default>::default::h45cb1f41e3daf8ec (0x103b17114) 2: <F as cargo::core::compiler::job::FnBox<A, R>>::call_box::hd5b96495299b4cd2 (0x1037307a1) 3: <F as cargo::core::compiler::job::FnBox<A, R>>::call_box::h05bcb4a6b3baee91 (0x103519d99) 4: <F as cargo::core::compiler::job::FnBox<A, R>>::call_box::h05bcb4a6b3baee91 (0x103519d99) 5: cargo::core::compiler::job::Job::run::h61355f8d9cb1d572 (0x103519e6e) 6: crossbeam_utils::thread::ScopedThreadBuilder::spawn::{{closure}}::h8f338d85344a6ba7 (0x10374aed9) 7: std::sys_common::backtrace::__rust_begin_short_backtrace::ha3ba31f6b7a9d297 (0x1034125fd) 8: ___rust_maybe_catch_panic (0x103b3d7fe) 9: <F as alloc::boxed::FnBox<A>>::call_box::hda9b9217608f805a (0x10341c889) 10: std::sys::unix::thread::Thread::new::thread_start::h9fabc538beb0d7ac (0x103b3cdcb) 11: __pthread_body (0x7fff78fc033c) 12: __pthread_start (0x7fff78fc32a6)