51813-error

error: internal compiler error: librustc_mir/transform/elaborate_drops.rs:375: drop of untracked, uninitialized value bb8, place ((*_3).0: core::option::Option<T>) (Parent(Some(mp3)))
   --> libstd/sync/mpsc/spsc_queue.rs:139:13
    |
139 |             (*n).value = Some(t);
    |             ^^^^^^^^^^

thread 'main' panicked at 'Box<Any>', librustc_errors/lib.rs:499:9
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
             at libstd/sys_common/backtrace.rs:59
   2: std::panicking::default_hook::{{closure}}
             at libstd/panicking.rs:211
   3: std::panicking::default_hook
             at libstd/panicking.rs:227
   4: rustc::util::common::panic_hook
             at librustc/util/common.rs:54
   5: std::panicking::rust_panic_with_hook
             at libstd/panicking.rs:515
   6: std::panicking::begin_panic
             at ./libstd/panicking.rs:445
   7: rustc_errors::Handler::span_bug
             at ./<panic macros>:3
   8: rustc::session::opt_span_bug_fmt::{{closure}}
             at ./librustc/session/mod.rs:1291
   9: rustc::ty::context::tls::with_opt::{{closure}}
             at ./librustc/ty/context.rs:1966
  10: rustc::ty::context::tls::with_context_opt
             at ./librustc/ty/context.rs:1903
  11: rustc::ty::context::tls::with_opt
             at ./librustc/ty/context.rs:1966
  12: rustc::session::opt_span_bug_fmt
             at ./librustc/session/mod.rs:1288
  13: rustc::session::span_bug_fmt
             at ./librustc/session/mod.rs:1279
  14: <rustc_mir::transform::elaborate_drops::ElaborateDrops as rustc_mir::transform::MirPass>::run_pass
             at librustc_mir/transform/elaborate_drops.rs:375
             at librustc_mir/transform/elaborate_drops.rs:338
             at librustc_mir/transform/elaborate_drops.rs:61
  15: rustc_mir::transform::optimized_mir::{{closure}}::{{closure}}
             at librustc_mir/transform/mod.rs:171
  16: rustc_mir::transform::optimized_mir::{{closure}}
             at librustc_mir/transform/mod.rs:176
  17: rustc_mir::transform::optimized_mir
             at librustc_mir/transform/mod.rs:231
  18: rustc::ty::maps::__query_compute::optimized_mir
             at librustc/ty/maps/plumbing.rs:773
             at librustc/ty/maps/plumbing.rs:744
  19: rustc::ty::maps::<impl rustc::ty::maps::config::QueryConfig<'tcx> for rustc::ty::maps::queries::optimized_mir<'tcx>>::compute
             at librustc/ty/maps/plumbing.rs:771
  20: rustc::dep_graph::graph::DepGraph::with_task_impl
             at librustc/dep_graph/graph.rs:341
  21: rustc::ty::context::tls::with_related_context
             at librustc/dep_graph/graph.rs:207
             at librustc/ty/maps/plumbing.rs:534
             at librustc/ty/maps/plumbing.rs:204
             at librustc/ty/context.rs:1828
             at librustc/ty/context.rs:1767
             at librustc/ty/context.rs:1827
             at librustc/ty/maps/plumbing.rs:203
             at librustc/ty/context.rs:1928
             at librustc/ty/context.rs:1912
             at librustc/ty/context.rs:1903
             at librustc/ty/context.rs:1912
             at librustc/ty/context.rs:1923
  22: rustc::ty::maps::plumbing::<impl rustc::ty::context::TyCtxt<'a, 'gcx, 'tcx>>::force_query_with_job
             at librustc/ty/maps/plumbing.rs:193
             at librustc/ty/maps/plumbing.rs:527
  23: rustc::ty::maps::plumbing::<impl rustc::ty::context::TyCtxt<'a, 'gcx, 'tcx>>::get_query
             at librustc/ty/maps/plumbing.rs:376
             at librustc/ty/maps/plumbing.rs:603
             at librustc/ty/maps/plumbing.rs:610
  24: rustc::ty::maps::<impl rustc::ty::context::TyCtxt<'a, 'tcx, 'lcx>>::optimized_mir
             at librustc/ty/maps/plumbing.rs:827
             at librustc/ty/maps/plumbing.rs:820
  25: rustc_metadata::encoder::<impl rustc_metadata::isolated_encoder::IsolatedEncoder<'a, 'b, 'tcx>>::encode_optimized_mir
             at librustc_metadata/encoder.rs:995
  26: rustc_metadata::encoder::<impl rustc_metadata::isolated_encoder::IsolatedEncoder<'a, 'b, 'tcx>>::encode_info_for_impl_item
             at librustc_metadata/encoder.rs:970
  27: rustc::ty::context::tls::with_context
             at librustc_metadata/index_builder.rs:129
             at ./librustc/dep_graph/graph.rs:166
             at ./librustc/ty/context.rs:1828
             at ./librustc/ty/context.rs:1767
             at ./librustc/ty/context.rs:1827
             at ./librustc/dep_graph/graph.rs:165
             at ./librustc/ty/context.rs:1912
             at ./librustc/ty/context.rs:1903
             at ./librustc/ty/context.rs:1912
  28: rustc_metadata::encoder::<impl rustc_metadata::index_builder::IndexBuilder<'a, 'b, 'tcx>>::encode_addl_info_for_item
             at ./librustc/dep_graph/graph.rs:159
             at librustc_metadata/index_builder.rs:127
             at librustc_metadata/encoder.rs:1742
  29: rustc::hir::Crate::visit_all_item_likes
             at ./librustc/hir/itemlikevisit.rs:80
             at ./librustc/hir/mod.rs:724
  30: rustc_metadata::encoder::encode_metadata
             at librustc_metadata/encoder.rs:329
             at librustc_metadata/encoder.rs:450
             at librustc_metadata/encoder.rs:1834
  31: rustc_metadata::cstore_impl::<impl rustc::middle::cstore::CrateStore for rustc_metadata::cstore::CStore>::encode_metadata
             at librustc_metadata/cstore_impl.rs:579
  32: rustc::ty::context::TyCtxt::encode_metadata
             at librustc/ty/context.rs:1455
  33: rustc_codegen_llvm::base::write_metadata
             at librustc_codegen_llvm/base.rs:653
  34: rustc::util::common::time
             at librustc_codegen_llvm/base.rs:740
             at ./librustc/util/common.rs:166
             at ./librustc/util/common.rs:160
  35: rustc_codegen_llvm::base::codegen_crate
             at librustc_codegen_llvm/base.rs:739
  36: <rustc_codegen_llvm::LlvmCodegenBackend as rustc_codegen_utils::codegen_backend::CodegenBackend>::codegen_crate
             at librustc_codegen_llvm/lib.rs:204
  37: rustc::util::common::time
             at librustc_driver/driver.rs:1324
             at ./librustc/util/common.rs:166
             at ./librustc/util/common.rs:160
  38: rustc_driver::driver::phase_4_codegen
             at librustc_driver/driver.rs:1324
  39: rustc_driver::driver::compile_input::{{closure}}
             at librustc_driver/driver.rs:325
  40: rustc::ty::context::tls::enter_context
             at librustc_driver/driver.rs:1308
             at ./librustc/ty/context.rs:1860
             at ./librustc/ty/context.rs:1828
             at ./librustc/ty/context.rs:1767
             at ./librustc/ty/context.rs:1827
  41: <std::thread::local::LocalKey<T>>::with
             at ./librustc/ty/context.rs:1859
             at ./librustc/ty/context.rs:1817
             at ./libstd/thread/local.rs:294
             at ./libstd/thread/local.rs:248
             at ./librustc/ty/context.rs:1809
             at ./libstd/thread/local.rs:294
             at ./libstd/thread/local.rs:248
  42: rustc::ty::context::TyCtxt::create_and_enter
             at ./librustc/ty/context.rs:1801
             at ./librustc/ty/context.rs:1839
             at ./librustc/ty/context.rs:1184
  43: rustc_driver::driver::compile_input
             at librustc_driver/driver.rs:1218
             at librustc_driver/driver.rs:284
  44: rustc_driver::run_compiler_with_pool
             at librustc_driver/lib.rs:551
  45: <scoped_tls::ScopedKey<T>>::set
             at librustc_driver/lib.rs:472
             at librustc_driver/driver.rs:73
             at /home/user/.cargo/registry/src/github.com-1ecc6299db9ec823/scoped-tls-0.1.1/src/lib.rs:155
  46: <scoped_tls::ScopedKey<T>>::set
             at librustc_driver/driver.rs:72
             at librustc_driver/lib.rs:471
             at /home/user/.cargo/registry/src/github.com-1ecc6299db9ec823/scoped-tls-0.1.1/src/lib.rs:155
             at ./libsyntax/lib.rs:97
             at /home/user/.cargo/registry/src/github.com-1ecc6299db9ec823/scoped-tls-0.1.1/src/lib.rs:155
  47: syntax::with_globals
             at ./libsyntax/lib.rs:96
  48: <std::panic::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once
             at librustc_driver/lib.rs:462
             at librustc_driver/lib.rs:1699
             at librustc_driver/lib.rs:180
             at librustc_driver/lib.rs:1613
             at ./libstd/panic.rs:308
  49: __rust_maybe_catch_panic
             at libpanic_unwind/lib.rs:105
  50: std::panicking::try
             at ./libstd/panicking.rs:289
  51: rustc_driver::run
             at ./libstd/panic.rs:392
             at librustc_driver/lib.rs:1545
             at librustc_driver/lib.rs:1612
             at librustc_driver/lib.rs:179
  52: rustc_driver::main
             at librustc_driver/lib.rs:1692
  53: std::rt::lang_start::{{closure}}
             at ./libstd/rt.rs:74
  54: std::panicking::try::do_call
             at libstd/rt.rs:59
             at libstd/panicking.rs:310
  55: __rust_maybe_catch_panic
             at libpanic_unwind/lib.rs:105
  56: std::panic::catch_unwind
             at libstd/panicking.rs:289
             at libstd/panic.rs:392
  57: std::rt::lang_start_internal
             at libstd/rt.rs:58
  58: main
  59: __libc_start_main
  60: _start
query stack during panic:
#0 [optimized_mir] processing `<sync::mpsc::spsc_queue::Queue<T, ProducerAddition, ConsumerAddition>>::push`
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 1.28.0-dev running on x86_64-unknown-linux-gnu

note: compiler flags: -Z force-unstable-if-unmarked -C prefer-dynamic -C opt-level=2 -C prefer-dynamic -C debug-assertions=y -C codegen-units=16 -C link-args=-Wl,-rpath,$ORIGIN/../lib --crate-type dylib --crate-type rlib

note: some of the compiler flags provided by cargo are hidden

error: Could not compile `std`.

Caused by:
  process didn't exit successfully: `/home/user/rust/build/bootstrap/debug/rustc --crate-name std libstd/lib.rs --error-format json --crate-type dylib --crate-type rlib --emit=dep-info,link -C prefer-dynamic -C opt-level=2 --cfg feature="alloc_jemalloc" --cfg feature="backtrace" --cfg feature="jemalloc" --cfg feature="panic-unwind" --cfg feature="panic_unwind" -C metadata=1a86a61763c2b34b -C extra-filename=-1a86a61763c2b34b --out-dir /home/user/rust/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps --target x86_64-unknown-linux-gnu -L dependency=/home/user/rust/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps -L dependency=/home/user/rust/build/x86_64-unknown-linux-gnu/stage1-std/release/deps --extern alloc=/home/user/rust/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps/liballoc-057d09441be39ab5.rlib --extern rustc_lsan=/home/user/rust/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps/librustc_lsan-613111e9987dd34b.rlib --extern rustc_tsan=/home/user/rust/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps/librustc_tsan-00347be741ae2593.rlib --extern panic_unwind=/home/user/rust/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps/libpanic_unwind-339c04ae4132d76c.rlib --extern alloc_system=/home/user/rust/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps/liballoc_system-5e948e8e93b206b3.rlib --extern rustc_msan=/home/user/rust/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps/librustc_msan-f42f9ae0d9b3b245.rlib --extern compiler_builtins=/home/user/rust/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps/libcompiler_builtins-371c588c1a3805de.rlib --extern std_unicode=/home/user/rust/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps/libstd_unicode-9cb32559fd090f4f.rlib --extern alloc_jemalloc=/home/user/rust/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps/liballoc_jemalloc-eb1d26a1b5f469f1.rlib --extern rustc_asan=/home/user/rust/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps/librustc_asan-0983f738af9f329b.rlib --extern libc=/home/user/rust/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps/liblibc-8a689bacec06a191.rlib --extern panic_abort=/home/user/rust/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps/libpanic_abort-dbdbba248951650b.rlib --extern unwind=/home/user/rust/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps/libunwind-e8ee297dbe25844d.rlib --extern core=/home/user/rust/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps/libcore-b8b7fb254e56b0ab.rlib -L native=/home/user/rust/build/x86_64-unknown-linux-gnu/native/libbacktrace/ -l static=backtrace -l dl -l rt -l pthread -L native=/home/user/rust/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/build/compiler_builtins-f3f01c545fe8aed7/out -L native=/home/user/rust/build/x86_64-unknown-linux-gnu/native/jemalloc/lib` (exit code: 101)
command did not execute successfully: "/home/user/rust/build/x86_64-unknown-linux-gnu/stage0/bin/cargo" "build" "--target" "x86_64-unknown-linux-gnu" "-j" "16" "--release" "--features" "panic-unwind jemalloc backtrace" "--manifest-path" "/home/user/rust/src/libstd/Cargo.toml" "--message-format" "json"
expected success, got: exit code: 101
thread 'main' panicked at 'cargo must succeed', bootstrap/compile.rs:1091:9
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
             at libstd/sys_common/backtrace.rs:59
   2: std::panicking::default_hook::{{closure}}
             at libstd/panicking.rs:211
   3: std::panicking::default_hook
             at libstd/panicking.rs:227
   4: std::panicking::rust_panic_with_hook
             at libstd/panicking.rs:463
   5: std::panicking::begin_panic
             at /checkout/src/libstd/panicking.rs:397
   6: bootstrap::compile::run_cargo
             at bootstrap/compile.rs:1091
   7: <bootstrap::compile::Std as bootstrap::builder::Step>::run
             at bootstrap/compile.rs:109
   8: bootstrap::builder::Builder::ensure
             at bootstrap/builder.rs:1109
   9: <bootstrap::compile::Test as bootstrap::builder::Step>::run
             at bootstrap/compile.rs:354
  10: bootstrap::builder::Builder::ensure
             at bootstrap/builder.rs:1109
  11: <bootstrap::compile::Rustc as bootstrap::builder::Step>::run
             at bootstrap/compile.rs:470
  12: bootstrap::builder::Builder::ensure
             at bootstrap/builder.rs:1109
  13: <bootstrap::compile::Assemble as bootstrap::builder::Step>::run
             at bootstrap/compile.rs:929
  14: bootstrap::builder::Builder::ensure
             at bootstrap/builder.rs:1109
  15: bootstrap::builder::Builder::compiler
             at bootstrap/builder.rs:569
  16: <bootstrap::compile::Std as bootstrap::builder::Step>::make_run
             at bootstrap/compile.rs:57
  17: bootstrap::builder::StepDescription::maybe_run
             at bootstrap/builder.rs:191
  18: bootstrap::builder::StepDescription::run
             at bootstrap/builder.rs:215
  19: bootstrap::builder::Builder::run_step_descriptions
             at bootstrap/builder.rs:561
  20: bootstrap::builder::Builder::execute_cli
             at bootstrap/builder.rs:551
  21: bootstrap::Build::build
             at bootstrap/lib.rs:450
  22: bootstrap::main
             at bootstrap/bin/main.rs:29
  23: std::rt::lang_start::{{closure}}
             at /checkout/src/libstd/rt.rs:74
  24: std::panicking::try::do_call
             at libstd/rt.rs:59
             at libstd/panicking.rs:310
  25: __rust_maybe_catch_panic
             at libpanic_unwind/lib.rs:105
  26: std::rt::lang_start_internal
             at libstd/panicking.rs:289
             at libstd/panic.rs:374
             at libstd/rt.rs:58
  27: std::rt::lang_start
             at /checkout/src/libstd/rt.rs:74
  28: main
  29: __libc_start_main
  30: _start
failed to run: /home/user/rust/build/bootstrap/debug/bootstrap build
Build completed unsuccessfully in 0:00:13