[INFO] cloning repository ruggeri/rust_learning [INFO] running `"git" "clone" "--bare" "git://github.com/ruggeri/rust_learning.git" "work/cache/sources/gh/ruggeri/rust_learning"` [INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/ruggeri/rust_learning'... [INFO] running `"git" "clone" "work/cache/sources/gh/ruggeri/rust_learning" "work/ex/pr-61874/sources/master#9f06855064ed06a50c496577b21ca50f92a2e67d/gh/ruggeri/rust_learning"` [INFO] [stderr] Cloning into 'work/ex/pr-61874/sources/master#9f06855064ed06a50c496577b21ca50f92a2e67d/gh/ruggeri/rust_learning'... [INFO] [stderr] done. [INFO] running `"git" "clone" "work/cache/sources/gh/ruggeri/rust_learning" "work/ex/pr-61874/sources/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df/gh/ruggeri/rust_learning"` [INFO] [stderr] Cloning into 'work/ex/pr-61874/sources/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df/gh/ruggeri/rust_learning'... [INFO] [stderr] done. [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] 6564c9e695a39cf690d74e0eb370d542f146007c [INFO] sha for GitHub repo ruggeri/rust_learning: 6564c9e695a39cf690d74e0eb370d542f146007c [INFO] validating manifest of ruggeri/rust_learning on toolchain master#9f06855064ed06a50c496577b21ca50f92a2e67d [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+9f06855064ed06a50c496577b21ca50f92a2e67d-alt" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] validating manifest of ruggeri/rust_learning on toolchain try#d3301713b54af69ca9de941a8c6b0d8287dbd6df [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+d3301713b54af69ca9de941a8c6b0d8287dbd6df-alt" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] started frobbing ruggeri/rust_learning [INFO] finished frobbing ruggeri/rust_learning [INFO] frobbed toml for ruggeri/rust_learning written to work/ex/pr-61874/sources/master#9f06855064ed06a50c496577b21ca50f92a2e67d/gh/ruggeri/rust_learning/Cargo.toml [INFO] started frobbing ruggeri/rust_learning [INFO] finished frobbing ruggeri/rust_learning [INFO] frobbed toml for ruggeri/rust_learning written to work/ex/pr-61874/sources/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df/gh/ruggeri/rust_learning/Cargo.toml [INFO] crate ruggeri/rust_learning already has a lockfile, it will not be regenerated [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+9f06855064ed06a50c496577b21ca50f92a2e67d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+d3301713b54af69ca9de941a8c6b0d8287dbd6df-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] checking ruggeri/rust_learning against try#d3301713b54af69ca9de941a8c6b0d8287dbd6df for pr-61874 [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61874/worker-2/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61874/sources/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df/gh/ruggeri/rust_learning:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+d3301713b54af69ca9de941a8c6b0d8287dbd6df-alt" "check" "--frozen" "--all" "--all-targets"` [INFO] [stdout] b856c2f612561e146efffb04cbf198dc9dfe15ac21368a582031d44702efc696 [INFO] running `"docker" "start" "-a" "b856c2f612561e146efffb04cbf198dc9dfe15ac21368a582031d44702efc696"` [INFO] [stderr] Checking rust_learning v0.1.0 (/opt/crater/workdir) [INFO] [stderr] thread 'rustc' panicked at 'assertion failed: self.bccx.region_scope_tree.scopes_intersect(old_loan.kill_scope, [INFO] [stderr] new_loan.kill_scope)', src/librustc_borrowck/borrowck/check_loans.rs:493:9 [INFO] [stderr] stack backtrace: [INFO] [stderr] thread 'rustc' panicked at 'assertion failed: self.bccx.region_scope_tree.scopes_intersect(old_loan.kill_scope, [INFO] [stderr] new_loan.kill_scope)', src/librustc_borrowck/borrowck/check_loans.rs:493:9 [INFO] [stderr] stack backtrace: [INFO] [stderr] 0: 0x7f141052c09b - backtrace::backtrace::libunwind::trace::h00e2f01ca6755a19 [INFO] [stderr] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.29/src/backtrace/libunwind.rs:88 [INFO] [stderr] 1: 0x7f141052c09b - backtrace::backtrace::trace_unsynchronized::hc2e55f9123c24578 [INFO] [stderr] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.29/src/backtrace/mod.rs:66 [INFO] [stderr] 2: 0x7f141052c09b - std::sys_common::backtrace::_print::h878d975ca669e1b4 [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:47 [INFO] [stderr] 3: 0x7f141052c09b - std::sys_common::backtrace::print::h1b2f6b4885b021f3 [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:36 [INFO] [stderr] 4: 0x7f141052c09b - std::panicking::default_hook::{{closure}}::he9ab19abef5c787f [INFO] [stderr] at src/libstd/panicking.rs:198 [INFO] [stderr] 5: 0x7f141052bd9c - std::panicking::default_hook::h9b73316e8577c3fa [INFO] [stderr] at src/libstd/panicking.rs:212 [INFO] [stderr] 6: 0x7f140dad8811 - rustc::util::common::panic_hook::h510943dce36e90b4 [INFO] [stderr] 7: 0x7f141052c8f9 - std::panicking::rust_panic_with_hook::he062866264d328c5 [INFO] [stderr] at src/libstd/panicking.rs:479 [INFO] [stderr] 0: 0x7fea2411a09b - backtrace::backtrace::libunwind::trace::h00e2f01ca6755a19 [INFO] [stderr] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.29/src/backtrace/libunwind.rs:88 [INFO] [stderr] 8: 0x7f140f4c8505 - std::panicking::begin_panic::hff7daf9346bdd1d2 [INFO] [stderr] 9: 0x7f140f49761d - rustc_borrowck::borrowck::check_loans::CheckLoanCtxt::report_error_if_loans_conflict::h62fa09379f59350b [INFO] [stderr] 10: 0x7f140f477a4e - rustc_borrowck::dataflow::DataFlowContext::each_bit_on_entry::h484085c7aaf7b65a [INFO] [stderr] 11: 0x7f140f4969f0 - ::borrow::h162532207988a7a7 [INFO] [stderr] 12: 0x7f140daaed70 - rustc::middle::expr_use_visitor::ExprUseVisitor::walk_expr::hd540f6524ae9e46e [INFO] [stderr] 13: 0x7f140daae82d - rustc::middle::expr_use_visitor::ExprUseVisitor::consume_expr::haf3fdf735df88da6 [INFO] [stderr] 14: 0x7f140daaf446 - rustc::middle::expr_use_visitor::ExprUseVisitor::walk_expr::hd540f6524ae9e46e [INFO] [stderr] 15: 0x7f140daae82d - rustc::middle::expr_use_visitor::ExprUseVisitor::consume_expr::haf3fdf735df88da6 [INFO] [stderr] 16: 0x7f140daaffab - rustc::middle::expr_use_visitor::ExprUseVisitor::walk_expr::hd540f6524ae9e46e [INFO] [stderr] 17: 0x7f140daae82d - rustc::middle::expr_use_visitor::ExprUseVisitor::consume_expr::haf3fdf735df88da6 [INFO] [stderr] 18: 0x7f140dab02b6 - rustc::middle::expr_use_visitor::ExprUseVisitor::walk_expr::hd540f6524ae9e46e [INFO] [stderr] 19: 0x7f140daae82d - rustc::middle::expr_use_visitor::ExprUseVisitor::consume_expr::haf3fdf735df88da6 [INFO] [stderr] 20: 0x7f140f497302 - rustc_borrowck::borrowck::check_loans::check_loans::hb997fc6e0bf43125 [INFO] [stderr] 21: 0x7f140f49e8d2 - rustc_borrowck::borrowck::borrowck::h53d8589928d089ef [INFO] [stderr] 1: 0x7fea2411a09b - backtrace::backtrace::trace_unsynchronized::hc2e55f9123c24578 [INFO] [stderr] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.29/src/backtrace/mod.rs:66 [INFO] [stderr] 2: 0x7fea2411a09b - std::sys_common::backtrace::_print::h878d975ca669e1b4 [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:47 [INFO] [stderr] 3: 0x7fea2411a09b - std::sys_common::backtrace::print::h1b2f6b4885b021f3 [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:36 [INFO] [stderr] 4: 0x7fea2411a09b - std::panicking::default_hook::{{closure}}::he9ab19abef5c787f [INFO] [stderr] at src/libstd/panicking.rs:198 [INFO] [stderr] 5: 0x7fea24119d9c - std::panicking::default_hook::h9b73316e8577c3fa [INFO] [stderr] at src/libstd/panicking.rs:212 [INFO] [stderr] 6: 0x7fea216c6811 - rustc::util::common::panic_hook::h510943dce36e90b4 [INFO] [stderr] 7: 0x7fea2411a8f9 - std::panicking::rust_panic_with_hook::he062866264d328c5 [INFO] [stderr] at src/libstd/panicking.rs:479 [INFO] [stderr] 8: 0x7fea230b6505 - std::panicking::begin_panic::hff7daf9346bdd1d2 [INFO] [stderr] 9: 0x7fea2308561d - rustc_borrowck::borrowck::check_loans::CheckLoanCtxt::report_error_if_loans_conflict::h62fa09379f59350b [INFO] [stderr] 10: 0x7fea23065a4e - rustc_borrowck::dataflow::DataFlowContext::each_bit_on_entry::h484085c7aaf7b65a [INFO] [stderr] 11: 0x7fea230849f0 - ::borrow::h162532207988a7a7 [INFO] [stderr] 12: 0x7fea2169cd70 - rustc::middle::expr_use_visitor::ExprUseVisitor::walk_expr::hd540f6524ae9e46e [INFO] [stderr] 13: 0x7fea2169c82d - rustc::middle::expr_use_visitor::ExprUseVisitor::consume_expr::haf3fdf735df88da6 [INFO] [stderr] 14: 0x7fea2169d446 - rustc::middle::expr_use_visitor::ExprUseVisitor::walk_expr::hd540f6524ae9e46e [INFO] [stderr] 15: 0x7fea2169c82d - rustc::middle::expr_use_visitor::ExprUseVisitor::consume_expr::haf3fdf735df88da6 [INFO] [stderr] 16: 0x7fea2169dfab - rustc::middle::expr_use_visitor::ExprUseVisitor::walk_expr::hd540f6524ae9e46e [INFO] [stderr] 17: 0x7fea2169c82d - rustc::middle::expr_use_visitor::ExprUseVisitor::consume_expr::haf3fdf735df88da6 [INFO] [stderr] 18: 0x7fea2169e2b6 - rustc::middle::expr_use_visitor::ExprUseVisitor::walk_expr::hd540f6524ae9e46e [INFO] [stderr] 19: 0x7fea2169c82d - rustc::middle::expr_use_visitor::ExprUseVisitor::consume_expr::haf3fdf735df88da6 [INFO] [stderr] 20: 0x7fea23085302 - rustc_borrowck::borrowck::check_loans::check_loans::hb997fc6e0bf43125 [INFO] [stderr] 21: 0x7fea2308c8d2 - rustc_borrowck::borrowck::borrowck::h53d8589928d089ef [INFO] [stderr] 22: 0x7f140ed76160 - rustc::ty::query::__query_compute::borrowck::haf7caf9d8cf2b0c6 [INFO] [stderr] 22: 0x7fea22964160 - rustc::ty::query::__query_compute::borrowck::haf7caf9d8cf2b0c6 [INFO] [stderr] 23: 0x7f140f09140d - rustc::ty::query::::compute::hf07071258f7e872e [INFO] [stderr] 24: 0x7f140ee04157 - rustc::dep_graph::graph::DepGraph::with_task_impl::h5f622357af169115 [INFO] [stderr] 25: 0x7f140f0c6eb5 - rustc::ty::query::plumbing::::get_query::h566647378d7c429f [INFO] [stderr] 26: 0x7f140ed996ad - rustc_mir::borrow_check::do_mir_borrowck::h884795928dca760f [INFO] [stderr] 27: 0x7f140f11bbb6 - rustc::ty::context::GlobalCtxt::enter_local::h24434ddbedeb2bd7 [INFO] [stderr] 28: 0x7f140ed953ba - rustc_mir::borrow_check::mir_borrowck::h340cbb12ec855792 [INFO] [stderr] 29: 0x7f140f825fc7 - rustc::ty::query::__query_compute::mir_borrowck::h2877ab5719b6d4de [INFO] [stderr] 30: 0x7f140f7e4e05 - rustc::ty::query::::compute::h0b8194857fcb0b90 [INFO] [stderr] 31: 0x7f140f81522c - rustc::dep_graph::graph::DepGraph::with_task_impl::h45c035986992265f [INFO] [stderr] 32: 0x7f140f7f9210 - rustc::ty::query::plumbing::::get_query::hb949ab5220029663 [INFO] [stderr] 33: 0x7f140f7e4af3 - rustc::ty::::par_body_owners::h0b936dfcfc9bf99d [INFO] [stderr] 34: 0x7f140f7b7508 - rustc::util::common::time::h4f9d7db6d102abc7 [INFO] [stderr] 35: 0x7f140f763482 - rustc_interface::passes::analysis::h4aaedabbb25d9a14 [INFO] [stderr] 36: 0x7f141088a756 - rustc::ty::query::__query_compute::analysis::hbb77ed6acb0de582 [INFO] [stderr] 37: 0x7f14107f6896 - rustc::dep_graph::graph::DepGraph::with_task_impl::h09f0fa54c19fa4ef [INFO] [stderr] 38: 0x7f14107f335c - rustc::ty::query::plumbing::::get_query::hb296b222742ed4c3 [INFO] [stderr] 39: 0x7f14107ffe66 - rustc::ty::context::tls::enter_global::h7c96e8fac898a718 [INFO] [stderr] 40: 0x7f141081ecd7 - rustc_interface::passes::BoxedGlobalCtxt::access::{{closure}}::h831db333239beb37 [INFO] [stderr] 41: 0x7f140f7c0955 - rustc_interface::passes::create_global_ctxt::{{closure}}::h9bbc41b62957b1e8 [INFO] [stderr] 42: 0x7f14108212da - rustc_interface::interface::run_compiler_in_existing_thread_pool::hff485ea1ac0471f7 [INFO] [stderr] 43: 0x7f14108907f6 - std::thread::local::LocalKey::with::h54be1934d4c013b3 [INFO] [stderr] 44: 0x7f141082ac25 - scoped_tls::ScopedKey::set::hcc2cdd6d7ab50f6e [INFO] [stderr] 45: 0x7f141085ca44 - syntax::with_globals::h0eb15fc28e6de47d [INFO] [stderr] 46: 0x7f141087b3dd - std::sys_common::backtrace::__rust_begin_short_backtrace::h8a5284324a16e3bb [INFO] [stderr] 47: 0x7f141053d7ea - __rust_maybe_catch_panic [INFO] [stderr] at src/libpanic_unwind/lib.rs:82 [INFO] [stderr] 48: 0x7f14108081b9 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h5bf2d6344c691517 [INFO] [stderr] 23: 0x7fea22c7f40d - rustc::ty::query::::compute::hf07071258f7e872e [INFO] [stderr] 24: 0x7fea229f2157 - rustc::dep_graph::graph::DepGraph::with_task_impl::h5f622357af169115 [INFO] [stderr] 49: 0x7f141050fdff - as core::ops::function::FnOnce>::call_once::h149530e323826845 [INFO] [stderr] at /rustc/d3301713b54af69ca9de941a8c6b0d8287dbd6df/src/liballoc/boxed.rs:746 [INFO] [stderr] 50: 0x7f141053c4c0 - as core::ops::function::FnOnce>::call_once::haa8a36b58b32537a [INFO] [stderr] at /rustc/d3301713b54af69ca9de941a8c6b0d8287dbd6df/src/liballoc/boxed.rs:746 [INFO] [stderr] 51: 0x7f141053c4c0 - std::sys_common::thread::start_thread::h73daaee3fc09b45f [INFO] [stderr] at src/libstd/sys_common/thread.rs:13 [INFO] [stderr] 52: 0x7f141053c4c0 - std::sys::unix::thread::Thread::new::thread_start::h78817f5e126bf45b [INFO] [stderr] at src/libstd/sys/unix/thread.rs:79 [INFO] [stderr] 25: 0x7fea22cb4eb5 - rustc::ty::query::plumbing::::get_query::h566647378d7c429f [INFO] [stderr] 53: 0x7f14102ae4a4 - start_thread [INFO] [stderr] 26: 0x7fea229876ad - rustc_mir::borrow_check::do_mir_borrowck::h884795928dca760f [INFO] [stderr] 54: 0x7f140fbe4d0f - __clone [INFO] [stderr] 27: 0x7fea22d09bb6 - rustc::ty::context::GlobalCtxt::enter_local::h24434ddbedeb2bd7 [INFO] [stderr] 55: 0x0 - [INFO] [stderr] query stack during panic: [INFO] [stderr] 28: 0x7fea229833ba - rustc_mir::borrow_check::mir_borrowck::h340cbb12ec855792 [INFO] [stderr] #0 [borrowck] processing `bst::bst::BST::::find_mut` [INFO] [stderr] #1 [mir_borrowck] processing `bst::bst::BST::::find_mut` [INFO] [stderr] 29: 0x7fea23413fc7 - rustc::ty::query::__query_compute::mir_borrowck::h2877ab5719b6d4de [INFO] [stderr] #2 [analysis] running analysis passes on this crate [INFO] [stderr] end of query stack [INFO] [stderr] 30: 0x7fea233d2e05 - rustc::ty::query::::compute::h0b8194857fcb0b90 [INFO] [stderr] 31: 0x7fea2340322c - rustc::dep_graph::graph::DepGraph::with_task_impl::h45c035986992265f [INFO] [stderr] 32: 0x7fea233e7210 - rustc::ty::query::plumbing::::get_query::hb949ab5220029663 [INFO] [stderr] 33: 0x7fea233d2af3 - rustc::ty::::par_body_owners::h0b936dfcfc9bf99d [INFO] [stderr] 34: 0x7fea233a5508 - rustc::util::common::time::h4f9d7db6d102abc7 [INFO] [stderr] 35: 0x7fea23351482 - rustc_interface::passes::analysis::h4aaedabbb25d9a14 [INFO] [stderr] 36: 0x7fea24478756 - rustc::ty::query::__query_compute::analysis::hbb77ed6acb0de582 [INFO] [stderr] 37: 0x7fea243e4896 - rustc::dep_graph::graph::DepGraph::with_task_impl::h09f0fa54c19fa4ef [INFO] [stderr] 38: 0x7fea243e135c - rustc::ty::query::plumbing::::get_query::hb296b222742ed4c3 [INFO] [stderr] 39: 0x7fea243ede66 - rustc::ty::context::tls::enter_global::h7c96e8fac898a718 [INFO] [stderr] 40: 0x7fea2440ccd7 - rustc_interface::passes::BoxedGlobalCtxt::access::{{closure}}::h831db333239beb37 [INFO] [stderr] 41: 0x7fea233ae955 - rustc_interface::passes::create_global_ctxt::{{closure}}::h9bbc41b62957b1e8 [INFO] [stderr] 42: 0x7fea2440f2da - rustc_interface::interface::run_compiler_in_existing_thread_pool::hff485ea1ac0471f7 [INFO] [stderr] 43: 0x7fea2447e7f6 - std::thread::local::LocalKey::with::h54be1934d4c013b3 [INFO] [stderr] 44: 0x7fea24418c25 - scoped_tls::ScopedKey::set::hcc2cdd6d7ab50f6e [INFO] [stderr] 45: 0x7fea2444aa44 - syntax::with_globals::h0eb15fc28e6de47d [INFO] [stderr] 46: 0x7fea244693dd - std::sys_common::backtrace::__rust_begin_short_backtrace::h8a5284324a16e3bb [INFO] [stderr] 47: 0x7fea2412b7ea - __rust_maybe_catch_panic [INFO] [stderr] at src/libpanic_unwind/lib.rs:82 [INFO] [stderr] 48: 0x7fea243f61b9 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h5bf2d6344c691517 [INFO] [stderr] 49: 0x7fea240fddff - as core::ops::function::FnOnce>::call_once::h149530e323826845 [INFO] [stderr] at /rustc/d3301713b54af69ca9de941a8c6b0d8287dbd6df/src/liballoc/boxed.rs:746 [INFO] [stderr] 50: 0x7fea2412a4c0 - as core::ops::function::FnOnce>::call_once::haa8a36b58b32537a [INFO] [stderr] at /rustc/d3301713b54af69ca9de941a8c6b0d8287dbd6df/src/liballoc/boxed.rs:746 [INFO] [stderr] 51: 0x7fea2412a4c0 - std::sys_common::thread::start_thread::h73daaee3fc09b45f [INFO] [stderr] at src/libstd/sys_common/thread.rs:13 [INFO] [stderr] 52: 0x7fea2412a4c0 - std::sys::unix::thread::Thread::new::thread_start::h78817f5e126bf45b [INFO] [stderr] at src/libstd/sys/unix/thread.rs:79 [INFO] [stderr] 53: 0x7fea23e9c4a4 - start_thread [INFO] [stderr] 54: 0x7fea237d2d0f - __clone [INFO] [stderr] 55: 0x0 - [INFO] [stderr] query stack during panic: [INFO] [stderr] #0 [borrowck] processing `bst::bst::BST::::find_mut` [INFO] [stderr] #1 [mir_borrowck] processing `bst::bst::BST::::find_mut` [INFO] [stderr] #2 [analysis] running analysis passes on this crate [INFO] [stderr] end of query stack [INFO] [stderr] [INFO] [stderr] error: internal compiler error: unexpected panic [INFO] [stderr] [INFO] [stderr] note: the compiler unexpectedly panicked. this is a bug. [INFO] [stderr] [INFO] [stderr] note: we would appreciate a bug report: https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md#bug-reports [INFO] [stderr] [INFO] [stderr] note: rustc 1.37.0-nightly (d3301713b 2019-06-15) running on x86_64-unknown-linux-gnu [INFO] [stderr] [INFO] [stderr] note: compiler flags: -C debuginfo=2 [INFO] [stderr] [INFO] [stderr] note: some of the compiler flags provided by cargo are hidden [INFO] [stderr] [INFO] [stderr] [INFO] [stderr] error: internal compiler error: unexpected panic [INFO] [stderr] [INFO] [stderr] note: the compiler unexpectedly panicked. this is a bug. [INFO] [stderr] [INFO] [stderr] note: we would appreciate a bug report: https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md#bug-reports [INFO] [stderr] [INFO] [stderr] note: rustc 1.37.0-nightly (d3301713b 2019-06-15) running on x86_64-unknown-linux-gnu [INFO] [stderr] [INFO] [stderr] note: compiler flags: -C debuginfo=2 --crate-type lib [INFO] [stderr] [INFO] [stderr] note: some of the compiler flags provided by cargo are hidden [INFO] [stderr] [INFO] [stderr] error: Could not compile `rust_learning`. [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stderr] error: Could not compile `rust_learning`. [INFO] [stderr] [INFO] [stderr] To learn more, run the command again with --verbose. [INFO] running `"docker" "inspect" "b856c2f612561e146efffb04cbf198dc9dfe15ac21368a582031d44702efc696"` [INFO] running `"docker" "rm" "-f" "b856c2f612561e146efffb04cbf198dc9dfe15ac21368a582031d44702efc696"` [INFO] [stdout] b856c2f612561e146efffb04cbf198dc9dfe15ac21368a582031d44702efc696