[INFO] updating cached repository ruggeri/rust_learning [INFO] running `"git" "fetch" "--all"` [INFO] [stdout] Fetching origin [INFO] [stderr] From git://github.com/ruggeri/rust_learning [INFO] [stderr] * branch HEAD -> FETCH_HEAD [INFO] running `"git" "clone" "work/cache/sources/gh/ruggeri/rust_learning" "work/ex/pr-62181/sources/master#6ea4036cd20a4b1ab1d56e555108c21735ff6946/gh/ruggeri/rust_learning"` [INFO] [stderr] Cloning into 'work/ex/pr-62181/sources/master#6ea4036cd20a4b1ab1d56e555108c21735ff6946/gh/ruggeri/rust_learning'... [INFO] [stderr] done. [INFO] running `"git" "clone" "work/cache/sources/gh/ruggeri/rust_learning" "work/ex/pr-62181/sources/try#003a7b6b5753e8509fdfe7949d4f0873ba71e4fc/gh/ruggeri/rust_learning"` [INFO] [stderr] Cloning into 'work/ex/pr-62181/sources/try#003a7b6b5753e8509fdfe7949d4f0873ba71e4fc/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#6ea4036cd20a4b1ab1d56e555108c21735ff6946 [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+6ea4036cd20a4b1ab1d56e555108c21735ff6946-alt" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] validating manifest of ruggeri/rust_learning on toolchain try#003a7b6b5753e8509fdfe7949d4f0873ba71e4fc [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+003a7b6b5753e8509fdfe7949d4f0873ba71e4fc-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-62181/sources/master#6ea4036cd20a4b1ab1d56e555108c21735ff6946/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-62181/sources/try#003a7b6b5753e8509fdfe7949d4f0873ba71e4fc/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" "+6ea4036cd20a4b1ab1d56e555108c21735ff6946-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+003a7b6b5753e8509fdfe7949d4f0873ba71e4fc-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] checking ruggeri/rust_learning against master#6ea4036cd20a4b1ab1d56e555108c21735ff6946 for pr-62181 [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62181/worker-4/master#6ea4036cd20a4b1ab1d56e555108c21735ff6946:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62181/sources/master#6ea4036cd20a4b1ab1d56e555108c21735ff6946/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" "+6ea4036cd20a4b1ab1d56e555108c21735ff6946-alt" "check" "--frozen" "--all" "--all-targets"` [INFO] [stdout] 38e9437b9cc030a15b6abbd6e675b125b02f6466767ce4c2bdf12af5f102d137 [INFO] running `"docker" "start" "-a" "38e9437b9cc030a15b6abbd6e675b125b02f6466767ce4c2bdf12af5f102d137"` [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: 0x7fae8a1591ab - backtrace::backtrace::libunwind::trace::h399a7a5a1c92b2d8 [INFO] [stderr] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.29/src/backtrace/libunwind.rs:88 [INFO] [stderr] 1: 0x7fae8a1591ab - backtrace::backtrace::trace_unsynchronized::h76e29b9231dd0873 [INFO] [stderr] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.29/src/backtrace/mod.rs:66 [INFO] [stderr] 2: 0x7fae8a1591ab - std::sys_common::backtrace::_print::hb092bf553e068953 [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:47 [INFO] [stderr] 3: 0x7fae8a1591ab - std::sys_common::backtrace::print::h3407b08071f3f520 [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:36 [INFO] [stderr] 4: 0x7fae8a1591ab - std::panicking::default_hook::{{closure}}::hc3b8cf51c83ab26e [INFO] [stderr] at src/libstd/panicking.rs:200 [INFO] [stderr] 5: 0x7fae8a158e87 - std::panicking::default_hook::h54ef93848f2476c8 [INFO] [stderr] at src/libstd/panicking.rs:214 [INFO] [stderr] 6: 0x7fae8776a0c1 - rustc::util::common::panic_hook::h194fb5071b311c71 [INFO] [stderr] 7: 0x7fae8a159a09 - std::panicking::rust_panic_with_hook::hf0df85aa51810823 [INFO] [stderr] at src/libstd/panicking.rs:481 [INFO] [stderr] 8: 0x7fae890c2235 - std::panicking::begin_panic::hb1265f0c5a0b3535 [INFO] [stderr] 9: 0x7fae890d395d - rustc_borrowck::borrowck::check_loans::CheckLoanCtxt::report_error_if_loans_conflict::h2865dce0a4e1be35 [INFO] [stderr] 10: 0x7fae890bedae - rustc_borrowck::dataflow::DataFlowContext::each_bit_on_entry::he2441c4384c3274d [INFO] [stderr] 11: 0x7fae890d2d30 - ::borrow::h5f571e40162122cd [INFO] [stderr] 12: 0x7fae87739b9b - rustc::middle::expr_use_visitor::ExprUseVisitor::walk_expr::hc2ba83414e92f166 [INFO] [stderr] 13: 0x7fae877392bd - rustc::middle::expr_use_visitor::ExprUseVisitor::consume_expr::h7f3d7168d67e1c81 [INFO] [stderr] 14: 0x7fae8773a363 - rustc::middle::expr_use_visitor::ExprUseVisitor::walk_expr::hc2ba83414e92f166 [INFO] [stderr] 15: 0x7fae877392bd - rustc::middle::expr_use_visitor::ExprUseVisitor::consume_expr::h7f3d7168d67e1c81 [INFO] [stderr] 16: 0x7fae8773aac6 - rustc::middle::expr_use_visitor::ExprUseVisitor::walk_expr::hc2ba83414e92f166 [INFO] [stderr] 17: 0x7fae877392bd - rustc::middle::expr_use_visitor::ExprUseVisitor::consume_expr::h7f3d7168d67e1c81 [INFO] [stderr] 18: 0x7fae8773ab66 - rustc::middle::expr_use_visitor::ExprUseVisitor::walk_expr::hc2ba83414e92f166 [INFO] [stderr] 19: 0x7fae877392bd - rustc::middle::expr_use_visitor::ExprUseVisitor::consume_expr::h7f3d7168d67e1c81 [INFO] [stderr] 20: 0x7fae890d3642 - rustc_borrowck::borrowck::check_loans::check_loans::h591254103db43e32 [INFO] [stderr] 21: 0x7fae890dff32 - rustc_borrowck::borrowck::borrowck::h86ad57616ea2f582 [INFO] [stderr] 22: 0x7fae889cb000 - rustc::ty::query::__query_compute::borrowck::h76f743c63cfa7451 [INFO] [stderr] 23: 0x7fae88cf7bbd - rustc::ty::query::::compute::hf065524f1c547162 [INFO] [stderr] 24: 0x7fae88a2972e - rustc::dep_graph::graph::DepGraph::with_task_impl::hc0c424aa6dc3d9b2 [INFO] [stderr] 0: 0x7fa6187741ab - backtrace::backtrace::libunwind::trace::h399a7a5a1c92b2d8 [INFO] [stderr] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.29/src/backtrace/libunwind.rs:88 [INFO] [stderr] 25: 0x7fae88d4b56d - rustc::ty::query::plumbing::::get_query::h8cb911c450710924 [INFO] [stderr] 1: 0x7fa6187741ab - backtrace::backtrace::trace_unsynchronized::h76e29b9231dd0873 [INFO] [stderr] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.29/src/backtrace/mod.rs:66 [INFO] [stderr] 26: 0x7fae88a4952a - rustc_mir::borrow_check::do_mir_borrowck::hc894e6eba3f83a7c [INFO] [stderr] 2: 0x7fa6187741ab - std::sys_common::backtrace::_print::hb092bf553e068953 [INFO] [stderr] 27: 0x7fae88d810ed - rustc::ty::context::GlobalCtxt::enter_local::hf9f69d29c4055f16 [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:47 [INFO] [stderr] 3: 0x7fa6187741ab - std::sys_common::backtrace::print::h3407b08071f3f520 [INFO] [stderr] 28: 0x7fae88a463fa - rustc_mir::borrow_check::mir_borrowck::h93050cfdd0a264f2 [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:36 [INFO] [stderr] 4: 0x7fa6187741ab - std::panicking::default_hook::{{closure}}::hc3b8cf51c83ab26e [INFO] [stderr] at src/libstd/panicking.rs:200 [INFO] [stderr] 29: 0x7fae89421d07 - rustc::ty::query::__query_compute::mir_borrowck::h830780424da58ec1 [INFO] [stderr] 5: 0x7fa618773e87 - std::panicking::default_hook::h54ef93848f2476c8 [INFO] [stderr] at src/libstd/panicking.rs:214 [INFO] [stderr] 6: 0x7fa615d850c1 - rustc::util::common::panic_hook::h194fb5071b311c71 [INFO] [stderr] 7: 0x7fa618774a09 - std::panicking::rust_panic_with_hook::hf0df85aa51810823 [INFO] [stderr] 30: 0x7fae89432785 - rustc::ty::query::::compute::hdf2da5be37c5047b [INFO] [stderr] at src/libstd/panicking.rs:481 [INFO] [stderr] 8: 0x7fa6176dd235 - std::panicking::begin_panic::hb1265f0c5a0b3535 [INFO] [stderr] 31: 0x7fae894666e1 - rustc::dep_graph::graph::DepGraph::with_task_impl::hd6f4142b421d05ff [INFO] [stderr] 9: 0x7fa6176ee95d - rustc_borrowck::borrowck::check_loans::CheckLoanCtxt::report_error_if_loans_conflict::h2865dce0a4e1be35 [INFO] [stderr] 10: 0x7fa6176d9dae - rustc_borrowck::dataflow::DataFlowContext::each_bit_on_entry::he2441c4384c3274d [INFO] [stderr] 32: 0x7fae894431a6 - rustc::ty::query::plumbing::::get_query::h52220c361e423399 [INFO] [stderr] 11: 0x7fa6176edd30 - ::borrow::h5f571e40162122cd [INFO] [stderr] 12: 0x7fa615d54b9b - rustc::middle::expr_use_visitor::ExprUseVisitor::walk_expr::hc2ba83414e92f166 [INFO] [stderr] 13: 0x7fa615d542bd - rustc::middle::expr_use_visitor::ExprUseVisitor::consume_expr::h7f3d7168d67e1c81 [INFO] [stderr] 33: 0x7fae89432603 - rustc::ty::::par_body_owners::hb5e79eabfa825ff0 [INFO] [stderr] 14: 0x7fa615d55363 - rustc::middle::expr_use_visitor::ExprUseVisitor::walk_expr::hc2ba83414e92f166 [INFO] [stderr] 34: 0x7fae893edd6e - rustc::util::common::time::h0f328cba457b3570 [INFO] [stderr] 15: 0x7fa615d542bd - rustc::middle::expr_use_visitor::ExprUseVisitor::consume_expr::h7f3d7168d67e1c81 [INFO] [stderr] 16: 0x7fa615d55ac6 - rustc::middle::expr_use_visitor::ExprUseVisitor::walk_expr::hc2ba83414e92f166 [INFO] [stderr] 35: 0x7fae893ab082 - rustc_interface::passes::analysis::h8acb988c7d0c5080 [INFO] [stderr] 17: 0x7fa615d542bd - rustc::middle::expr_use_visitor::ExprUseVisitor::consume_expr::h7f3d7168d67e1c81 [INFO] [stderr] 18: 0x7fa615d55b66 - rustc::middle::expr_use_visitor::ExprUseVisitor::walk_expr::hc2ba83414e92f166 [INFO] [stderr] 36: 0x7fae8a4adc16 - rustc::ty::query::__query_compute::analysis::h770387705118ded8 [INFO] [stderr] 19: 0x7fa615d542bd - rustc::middle::expr_use_visitor::ExprUseVisitor::consume_expr::h7f3d7168d67e1c81 [INFO] [stderr] 20: 0x7fa6176ee642 - rustc_borrowck::borrowck::check_loans::check_loans::h591254103db43e32 [INFO] [stderr] 21: 0x7fa6176faf32 - rustc_borrowck::borrowck::borrowck::h86ad57616ea2f582 [INFO] [stderr] 22: 0x7fa616fe6000 - rustc::ty::query::__query_compute::borrowck::h76f743c63cfa7451 [INFO] [stderr] 37: 0x7fae8a41cf19 - rustc::ty::query::::compute::hb3e250ee6970116c [INFO] [stderr] 23: 0x7fa617312bbd - rustc::ty::query::::compute::hf065524f1c547162 [INFO] [stderr] 38: 0x7fae8a4b09a3 - rustc::dep_graph::graph::DepGraph::with_task_impl::hd0ec7d96977fb8ca [INFO] [stderr] 24: 0x7fa61704472e - rustc::dep_graph::graph::DepGraph::with_task_impl::hc0c424aa6dc3d9b2 [INFO] [stderr] 25: 0x7fa61736656d - rustc::ty::query::plumbing::::get_query::h8cb911c450710924 [INFO] [stderr] 26: 0x7fa61706452a - rustc_mir::borrow_check::do_mir_borrowck::hc894e6eba3f83a7c [INFO] [stderr] 39: 0x7fae8a422782 - rustc::ty::query::plumbing::::get_query::hc5d07149c8fab904 [INFO] [stderr] 27: 0x7fa61739c0ed - rustc::ty::context::GlobalCtxt::enter_local::hf9f69d29c4055f16 [INFO] [stderr] 28: 0x7fa6170613fa - rustc_mir::borrow_check::mir_borrowck::h93050cfdd0a264f2 [INFO] [stderr] 29: 0x7fa617a3cd07 - rustc::ty::query::__query_compute::mir_borrowck::h830780424da58ec1 [INFO] [stderr] 40: 0x7fae8a423cd6 - rustc::ty::context::tls::enter_global::hc8d9e907987d8ce7 [INFO] [stderr] 30: 0x7fa617a4d785 - rustc::ty::query::::compute::hdf2da5be37c5047b [INFO] [stderr] 31: 0x7fa617a816e1 - rustc::dep_graph::graph::DepGraph::with_task_impl::hd6f4142b421d05ff [INFO] [stderr] 32: 0x7fa617a5e1a6 - rustc::ty::query::plumbing::::get_query::h52220c361e423399 [INFO] [stderr] 33: 0x7fa617a4d603 - rustc::ty::::par_body_owners::hb5e79eabfa825ff0 [INFO] [stderr] 34: 0x7fa617a08d6e - rustc::util::common::time::h0f328cba457b3570 [INFO] [stderr] 35: 0x7fa6179c6082 - rustc_interface::passes::analysis::h8acb988c7d0c5080 [INFO] [stderr] 36: 0x7fa618ac8c16 - rustc::ty::query::__query_compute::analysis::h770387705118ded8 [INFO] [stderr] 41: 0x7fae8a4280a7 - rustc_interface::passes::BoxedGlobalCtxt::access::{{closure}}::hd3e5f998f55da488 [INFO] [stderr] 37: 0x7fa618a37f19 - rustc::ty::query::::compute::hb3e250ee6970116c [INFO] [stderr] 38: 0x7fa618acb9a3 - rustc::dep_graph::graph::DepGraph::with_task_impl::hd0ec7d96977fb8ca [INFO] [stderr] 39: 0x7fa618a3d782 - rustc::ty::query::plumbing::::get_query::hc5d07149c8fab904 [INFO] [stderr] 40: 0x7fa618a3ecd6 - rustc::ty::context::tls::enter_global::hc8d9e907987d8ce7 [INFO] [stderr] 41: 0x7fa618a430a7 - rustc_interface::passes::BoxedGlobalCtxt::access::{{closure}}::hd3e5f998f55da488 [INFO] [stderr] 42: 0x7fa617a0e14a - rustc_interface::passes::create_global_ctxt::{{closure}}::h797bf9fc55e3ee73 [INFO] [stderr] 42: 0x7fae893f314a - rustc_interface::passes::create_global_ctxt::{{closure}}::h797bf9fc55e3ee73 [INFO] [stderr] 43: 0x7fa618a442d8 - rustc_interface::interface::run_compiler_in_existing_thread_pool::h4ac22a0a102e417c [INFO] [stderr] 44: 0x7fa618a668b2 - std::thread::local::LocalKey::with::h543695e243311344 [INFO] [stderr] 45: 0x7fa618a7a461 - scoped_tls::ScopedKey::set::h4bd214c321f814f8 [INFO] [stderr] 46: 0x7fa618a92514 - syntax::with_globals::h4d6f58262f16b8c3 [INFO] [stderr] 43: 0x7fae8a4292d8 - rustc_interface::interface::run_compiler_in_existing_thread_pool::h4ac22a0a102e417c [INFO] [stderr] 47: 0x7fa618a3392d - std::sys_common::backtrace::__rust_begin_short_backtrace::h14e77dc8103b84f5 [INFO] [stderr] 44: 0x7fae8a44b8b2 - std::thread::local::LocalKey::with::h543695e243311344 [INFO] [stderr] 48: 0x7fa61878546a - __rust_maybe_catch_panic [INFO] [stderr] 45: 0x7fae8a45f461 - scoped_tls::ScopedKey::set::h4bd214c321f814f8 [INFO] [stderr] at src/libpanic_unwind/lib.rs:82 [INFO] [stderr] 46: 0x7fae8a477514 - syntax::with_globals::h4d6f58262f16b8c3 [INFO] [stderr] 47: 0x7fae8a41892d - std::sys_common::backtrace::__rust_begin_short_backtrace::h14e77dc8103b84f5 [INFO] [stderr] 48: 0x7fae8a16a46a - __rust_maybe_catch_panic [INFO] [stderr] at src/libpanic_unwind/lib.rs:82 [INFO] [stderr] 49: 0x7fae8a42bcc9 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h6a67656f070da2e4 [INFO] [stderr] 50: 0x7fae8a13ce2f - as core::ops::function::FnOnce>::call_once::hc926cb8f1ffb1576 [INFO] [stderr] at /rustc/6ea4036cd20a4b1ab1d56e555108c21735ff6946/src/liballoc/boxed.rs:746 [INFO] [stderr] 51: 0x7fae8a169150 - as core::ops::function::FnOnce>::call_once::hd9ed45398eaa9431 [INFO] [stderr] at /rustc/6ea4036cd20a4b1ab1d56e555108c21735ff6946/src/liballoc/boxed.rs:746 [INFO] [stderr] 52: 0x7fae8a169150 - std::sys_common::thread::start_thread::h941484ed108e0d6a [INFO] [stderr] at src/libstd/sys_common/thread.rs:13 [INFO] [stderr] 53: 0x7fae8a169150 - std::sys::unix::thread::Thread::new::thread_start::h3f8b7446259f25db [INFO] [stderr] at src/libstd/sys/unix/thread.rs:79 [INFO] [stderr] 54: 0x7fae89edb4a4 - start_thread [INFO] [stderr] 55: 0x7fae89811d0f - __clone [INFO] [stderr] 56: 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] 49: 0x7fa618a46cc9 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h6a67656f070da2e4 [INFO] [stderr] 50: 0x7fa618757e2f - as core::ops::function::FnOnce>::call_once::hc926cb8f1ffb1576 [INFO] [stderr] at /rustc/6ea4036cd20a4b1ab1d56e555108c21735ff6946/src/liballoc/boxed.rs:746 [INFO] [stderr] 51: 0x7fa618784150 - as core::ops::function::FnOnce>::call_once::hd9ed45398eaa9431 [INFO] [stderr] at /rustc/6ea4036cd20a4b1ab1d56e555108c21735ff6946/src/liballoc/boxed.rs:746 [INFO] [stderr] 52: 0x7fa618784150 - std::sys_common::thread::start_thread::h941484ed108e0d6a [INFO] [stderr] at src/libstd/sys_common/thread.rs:13 [INFO] [stderr] 53: 0x7fa618784150 - std::sys::unix::thread::Thread::new::thread_start::h3f8b7446259f25db [INFO] [stderr] at src/libstd/sys/unix/thread.rs:79 [INFO] [stderr] 54: 0x7fa6184f64a4 - start_thread [INFO] [stderr] 55: 0x7fa617e2cd0f - __clone [INFO] [stderr] 56: 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 (6ea4036cd 2019-07-01) 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 (6ea4036cd 2019-07-01) 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" "38e9437b9cc030a15b6abbd6e675b125b02f6466767ce4c2bdf12af5f102d137"` [INFO] running `"docker" "rm" "-f" "38e9437b9cc030a15b6abbd6e675b125b02f6466767ce4c2bdf12af5f102d137"` [INFO] [stdout] 38e9437b9cc030a15b6abbd6e675b125b02f6466767ce4c2bdf12af5f102d137