[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-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/ruggeri/rust_learning"` [INFO] [stderr] Cloning into 'work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/ruggeri/rust_learning'... [INFO] [stderr] done. [INFO] running `"git" "clone" "work/cache/sources/gh/ruggeri/rust_learning" "work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/gh/ruggeri/rust_learning"` [INFO] [stderr] Cloning into 'work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/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#5f9c0448dde167128d668da4555879f64e56af1d [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] validating manifest of ruggeri/rust_learning on toolchain try#8ec8125bea94852768b56958f05da47666c21ab0 [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-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-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/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-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/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" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] checking ruggeri/rust_learning against try#8ec8125bea94852768b56958f05da47666c21ab0 for pr-62133 [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62133/worker-0/try#8ec8125bea94852768b56958f05da47666c21ab0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/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" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "check" "--frozen" "--all" "--all-targets"` [INFO] [stdout] f52c57782589a627a67f76a7ff1889f6b239bbdedf10b9e4994b033c1e35669d [INFO] running `"docker" "start" "-a" "f52c57782589a627a67f76a7ff1889f6b239bbdedf10b9e4994b033c1e35669d"` [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: 0x7f826a7e518b - backtrace::backtrace::libunwind::trace::h65f453dfe0027df1 [INFO] [stderr] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.29/src/backtrace/libunwind.rs:88 [INFO] [stderr] 1: 0x7f826a7e518b - backtrace::backtrace::trace_unsynchronized::hcf757005c6accfed [INFO] [stderr] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.29/src/backtrace/mod.rs:66 [INFO] [stderr] 2: 0x7f826a7e518b - std::sys_common::backtrace::_print::h3230a9d2592a2eba [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:47 [INFO] [stderr] 3: 0x7f826a7e518b - std::sys_common::backtrace::print::h19f579688627ee7e [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:36 [INFO] [stderr] 4: 0x7f826a7e518b - std::panicking::default_hook::{{closure}}::h472b43365b331815 [INFO] [stderr] at src/libstd/panicking.rs:198 [INFO] [stderr] 5: 0x7f826a7e4e67 - std::panicking::default_hook::h0857821e5ff5a369 [INFO] [stderr] at src/libstd/panicking.rs:212 [INFO] [stderr] 6: 0x7f8267d486f1 - rustc::util::common::panic_hook::h44f6613220ffd67b [INFO] [stderr] 7: 0x7f826a7e59e9 - std::panicking::rust_panic_with_hook::ha9d31dc2aa8d852d [INFO] [stderr] at src/libstd/panicking.rs:479 [INFO] [stderr] 8: 0x7f8269786415 - std::panicking::begin_panic::h67b3d70ae47611fe [INFO] [stderr] 9: 0x7f82697559dd - rustc_borrowck::borrowck::check_loans::CheckLoanCtxt::report_error_if_loans_conflict::h5a0e2b99881a4567 [INFO] [stderr] 10: 0x7f8269735a3e - rustc_borrowck::dataflow::DataFlowContext::each_bit_on_entry::h0b642984b141b301 [INFO] [stderr] 11: 0x7f8269754dc0 - ::borrow::h4ffbe3dacd2d4f47 [INFO] [stderr] 12: 0x7f8267d18f5a - rustc::middle::expr_use_visitor::ExprUseVisitor::walk_expr::hb5104145c10ba3c6 [INFO] [stderr] 13: 0x7f8267d189fd - rustc::middle::expr_use_visitor::ExprUseVisitor::consume_expr::ha00364cbd20e5456 [INFO] [stderr] 14: 0x7f8267d195a1 - rustc::middle::expr_use_visitor::ExprUseVisitor::walk_expr::hb5104145c10ba3c6 [INFO] [stderr] 15: 0x7f8267d189fd - rustc::middle::expr_use_visitor::ExprUseVisitor::consume_expr::ha00364cbd20e5456 [INFO] [stderr] 16: 0x7f8267d19f64 - rustc::middle::expr_use_visitor::ExprUseVisitor::walk_expr::hb5104145c10ba3c6 [INFO] [stderr] 17: 0x7f8267d189fd - rustc::middle::expr_use_visitor::ExprUseVisitor::consume_expr::ha00364cbd20e5456 [INFO] [stderr] 18: 0x7f8267d1a293 - rustc::middle::expr_use_visitor::ExprUseVisitor::walk_expr::hb5104145c10ba3c6 [INFO] [stderr] 19: 0x7f8267d189fd - rustc::middle::expr_use_visitor::ExprUseVisitor::consume_expr::ha00364cbd20e5456 [INFO] [stderr] 20: 0x7f82697556c2 - rustc_borrowck::borrowck::check_loans::check_loans::ha70fe9462e1be7b3 [INFO] [stderr] 21: 0x7f826975c922 - rustc_borrowck::borrowck::borrowck::hf7b9b37d8e107642 [INFO] [stderr] 22: 0x7f8268fd2660 - rustc::ty::query::__query_compute::borrowck::hdc5873584a6a765a [INFO] [stderr] 23: 0x7f826935052d - rustc::ty::query::::compute::hb8103e2031b5419d [INFO] [stderr] 24: 0x7f8269084a6e - rustc::dep_graph::graph::DepGraph::with_task_impl::he6d168c1d06bd3d6 [INFO] [stderr] 25: 0x7f826937f222 - rustc::ty::query::plumbing::::get_query::h640c13f6412c9a25 [INFO] [stderr] 26: 0x7f82690a099a - rustc_mir::borrow_check::do_mir_borrowck::hcc41dede2a234c28 [INFO] [stderr] 27: 0x7f82693dc26d - rustc::ty::context::GlobalCtxt::enter_local::hd3de487aff8f49cb [INFO] [stderr] 28: 0x7f826909d87a - rustc_mir::borrow_check::mir_borrowck::h23cb2b868678d87f [INFO] [stderr] 29: 0x7f8269ae0287 - rustc::ty::query::__query_compute::mir_borrowck::hdb060021836e92f4 [INFO] [stderr] 30: 0x7f8269a9fde5 - rustc::ty::query::::compute::h725277bfbcb4d139 [INFO] [stderr] 31: 0x7f8269ad0d31 - rustc::dep_graph::graph::DepGraph::with_task_impl::h6abb51fc1a78a1a5 [INFO] [stderr] 32: 0x7f8269ab52b7 - rustc::ty::query::plumbing::::get_query::h94a3def75d40aff6 [INFO] [stderr] 33: 0x7f8269a9fc63 - rustc::ty::::par_body_owners::hf89d44418f0ac08e [INFO] [stderr] 34: 0x7f8269a7405e - rustc::util::common::time::h8ae77dfab4271264 [INFO] [stderr] 35: 0x7f8269a208a2 - rustc_interface::passes::analysis::h840c89c178b5ebec [INFO] [stderr] 36: 0x7f826ab39196 - rustc::ty::query::__query_compute::analysis::h4a5741a641332847 [INFO] [stderr] 37: 0x7f826ab4b046 - rustc::dep_graph::graph::DepGraph::with_task_impl::hf428121c32590a21 [INFO] [stderr] 38: 0x7f826ab47080 - rustc::ty::query::plumbing::::get_query::hb1f409c5ec319027 [INFO] [stderr] 39: 0x7f826aaaad36 - rustc::ty::context::tls::enter_global::h5577f27a7b4722d8 [INFO] [stderr] 40: 0x7f826aacc8d7 - rustc_interface::passes::BoxedGlobalCtxt::access::{{closure}}::hbdf2d324129bc7e7 [INFO] [stderr] 41: 0x7f8269a7c01a - rustc_interface::passes::create_global_ctxt::{{closure}}::h838d78ddaee55abd [INFO] [stderr] 42: 0x7f826aace4b8 - rustc_interface::interface::run_compiler_in_existing_thread_pool::h9ea8157e1d76eceb [INFO] [stderr] 43: 0x7f826aae7532 - std::thread::local::LocalKey::with::h7992bf0f86ec5b9f [INFO] [stderr] 44: 0x7f826aad6bb1 - scoped_tls::ScopedKey::set::h5edcb9702bad03a4 [INFO] [stderr] 45: 0x7f826ab0b7f4 - syntax::with_globals::h70c8fbd82e32e264 [INFO] [stderr] 46: 0x7f826ab29d5d - std::sys_common::backtrace::__rust_begin_short_backtrace::h4cd18cca372e746d [INFO] [stderr] 47: 0x7f826a7f644a - __rust_maybe_catch_panic [INFO] [stderr] at src/libpanic_unwind/lib.rs:82 [INFO] [stderr] 48: 0x7f826aab3f39 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h232f4d7650a29949 [INFO] [stderr] 49: 0x7f826a7c8e3f - as core::ops::function::FnOnce>::call_once::h6027cda637163e29 [INFO] [stderr] at /rustc/8ec8125bea94852768b56958f05da47666c21ab0/src/liballoc/boxed.rs:746 [INFO] [stderr] 50: 0x7f826a7f5130 - as core::ops::function::FnOnce>::call_once::h88414c633ccf349b [INFO] [stderr] at /rustc/8ec8125bea94852768b56958f05da47666c21ab0/src/liballoc/boxed.rs:746 [INFO] [stderr] 51: 0x7f826a7f5130 - std::sys_common::thread::start_thread::h29182470b6ce6639 [INFO] [stderr] at src/libstd/sys_common/thread.rs:13 [INFO] [stderr] 52: 0x7f826a7f5130 - std::sys::unix::thread::Thread::new::thread_start::had2013a81613ef8d [INFO] [stderr] at src/libstd/sys/unix/thread.rs:79 [INFO] [stderr] 53: 0x7f826a5674a4 - start_thread [INFO] [stderr] 54: 0x7f8269e9dd0f - __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 (8ec8125be 2019-06-25) 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] 0: 0x7f024674518b - backtrace::backtrace::libunwind::trace::h65f453dfe0027df1 [INFO] [stderr] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.29/src/backtrace/libunwind.rs:88 [INFO] [stderr] 1: 0x7f024674518b - backtrace::backtrace::trace_unsynchronized::hcf757005c6accfed [INFO] [stderr] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.29/src/backtrace/mod.rs:66 [INFO] [stderr] 2: 0x7f024674518b - std::sys_common::backtrace::_print::h3230a9d2592a2eba [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:47 [INFO] [stderr] 3: 0x7f024674518b - std::sys_common::backtrace::print::h19f579688627ee7e [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:36 [INFO] [stderr] 4: 0x7f024674518b - std::panicking::default_hook::{{closure}}::h472b43365b331815 [INFO] [stderr] at src/libstd/panicking.rs:198 [INFO] [stderr] 5: 0x7f0246744e67 - std::panicking::default_hook::h0857821e5ff5a369 [INFO] [stderr] at src/libstd/panicking.rs:212 [INFO] [stderr] 6: 0x7f0243ca86f1 - rustc::util::common::panic_hook::h44f6613220ffd67b [INFO] [stderr] 7: 0x7f02467459e9 - std::panicking::rust_panic_with_hook::ha9d31dc2aa8d852d [INFO] [stderr] at src/libstd/panicking.rs:479 [INFO] [stderr] 8: 0x7f02456e6415 - std::panicking::begin_panic::h67b3d70ae47611fe [INFO] [stderr] 9: 0x7f02456b59dd - rustc_borrowck::borrowck::check_loans::CheckLoanCtxt::report_error_if_loans_conflict::h5a0e2b99881a4567 [INFO] [stderr] 10: 0x7f0245695a3e - rustc_borrowck::dataflow::DataFlowContext::each_bit_on_entry::h0b642984b141b301 [INFO] [stderr] 11: 0x7f02456b4dc0 - ::borrow::h4ffbe3dacd2d4f47 [INFO] [stderr] 12: 0x7f0243c78f5a - rustc::middle::expr_use_visitor::ExprUseVisitor::walk_expr::hb5104145c10ba3c6 [INFO] [stderr] 13: 0x7f0243c789fd - rustc::middle::expr_use_visitor::ExprUseVisitor::consume_expr::ha00364cbd20e5456 [INFO] [stderr] 14: 0x7f0243c795a1 - rustc::middle::expr_use_visitor::ExprUseVisitor::walk_expr::hb5104145c10ba3c6 [INFO] [stderr] 15: 0x7f0243c789fd - rustc::middle::expr_use_visitor::ExprUseVisitor::consume_expr::ha00364cbd20e5456 [INFO] [stderr] 16: 0x7f0243c79f64 - rustc::middle::expr_use_visitor::ExprUseVisitor::walk_expr::hb5104145c10ba3c6 [INFO] [stderr] 17: 0x7f0243c789fd - rustc::middle::expr_use_visitor::ExprUseVisitor::consume_expr::ha00364cbd20e5456 [INFO] [stderr] 18: 0x7f0243c7a293 - rustc::middle::expr_use_visitor::ExprUseVisitor::walk_expr::hb5104145c10ba3c6 [INFO] [stderr] 19: 0x7f0243c789fd - rustc::middle::expr_use_visitor::ExprUseVisitor::consume_expr::ha00364cbd20e5456 [INFO] [stderr] 20: 0x7f02456b56c2 - rustc_borrowck::borrowck::check_loans::check_loans::ha70fe9462e1be7b3 [INFO] [stderr] 21: 0x7f02456bc922 - rustc_borrowck::borrowck::borrowck::hf7b9b37d8e107642 [INFO] [stderr] 22: 0x7f0244f32660 - rustc::ty::query::__query_compute::borrowck::hdc5873584a6a765a [INFO] [stderr] 23: 0x7f02452b052d - rustc::ty::query::::compute::hb8103e2031b5419d [INFO] [stderr] 24: 0x7f0244fe4a6e - rustc::dep_graph::graph::DepGraph::with_task_impl::he6d168c1d06bd3d6 [INFO] [stderr] 25: 0x7f02452df222 - rustc::ty::query::plumbing::::get_query::h640c13f6412c9a25 [INFO] [stderr] 26: 0x7f024500099a - rustc_mir::borrow_check::do_mir_borrowck::hcc41dede2a234c28 [INFO] [stderr] 27: 0x7f024533c26d - rustc::ty::context::GlobalCtxt::enter_local::hd3de487aff8f49cb [INFO] [stderr] 28: 0x7f0244ffd87a - rustc_mir::borrow_check::mir_borrowck::h23cb2b868678d87f [INFO] [stderr] 29: 0x7f0245a40287 - rustc::ty::query::__query_compute::mir_borrowck::hdb060021836e92f4 [INFO] [stderr] 30: 0x7f02459ffde5 - rustc::ty::query::::compute::h725277bfbcb4d139 [INFO] [stderr] 31: 0x7f0245a30d31 - rustc::dep_graph::graph::DepGraph::with_task_impl::h6abb51fc1a78a1a5 [INFO] [stderr] 32: 0x7f0245a152b7 - rustc::ty::query::plumbing::::get_query::h94a3def75d40aff6 [INFO] [stderr] 33: 0x7f02459ffc63 - rustc::ty::::par_body_owners::hf89d44418f0ac08e [INFO] [stderr] 34: 0x7f02459d405e - rustc::util::common::time::h8ae77dfab4271264 [INFO] [stderr] 35: 0x7f02459808a2 - rustc_interface::passes::analysis::h840c89c178b5ebec [INFO] [stderr] 36: 0x7f0246a99196 - rustc::ty::query::__query_compute::analysis::h4a5741a641332847 [INFO] [stderr] 37: 0x7f0246aab046 - rustc::dep_graph::graph::DepGraph::with_task_impl::hf428121c32590a21 [INFO] [stderr] 38: 0x7f0246aa7080 - rustc::ty::query::plumbing::::get_query::hb1f409c5ec319027 [INFO] [stderr] 39: 0x7f0246a0ad36 - rustc::ty::context::tls::enter_global::h5577f27a7b4722d8 [INFO] [stderr] 40: 0x7f0246a2c8d7 - rustc_interface::passes::BoxedGlobalCtxt::access::{{closure}}::hbdf2d324129bc7e7 [INFO] [stderr] 41: 0x7f02459dc01a - rustc_interface::passes::create_global_ctxt::{{closure}}::h838d78ddaee55abd [INFO] [stderr] 42: 0x7f0246a2e4b8 - rustc_interface::interface::run_compiler_in_existing_thread_pool::h9ea8157e1d76eceb [INFO] [stderr] 43: 0x7f0246a47532 - std::thread::local::LocalKey::with::h7992bf0f86ec5b9f [INFO] [stderr] 44: 0x7f0246a36bb1 - scoped_tls::ScopedKey::set::h5edcb9702bad03a4 [INFO] [stderr] 45: 0x7f0246a6b7f4 - syntax::with_globals::h70c8fbd82e32e264 [INFO] [stderr] 46: 0x7f0246a89d5d - std::sys_common::backtrace::__rust_begin_short_backtrace::h4cd18cca372e746d [INFO] [stderr] 47: 0x7f024675644a - __rust_maybe_catch_panic [INFO] [stderr] at src/libpanic_unwind/lib.rs:82 [INFO] [stderr] 48: 0x7f0246a13f39 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h232f4d7650a29949 [INFO] [stderr] 49: 0x7f0246728e3f - as core::ops::function::FnOnce>::call_once::h6027cda637163e29 [INFO] [stderr] at /rustc/8ec8125bea94852768b56958f05da47666c21ab0/src/liballoc/boxed.rs:746 [INFO] [stderr] 50: 0x7f0246755130 - as core::ops::function::FnOnce>::call_once::h88414c633ccf349b [INFO] [stderr] at /rustc/8ec8125bea94852768b56958f05da47666c21ab0/src/liballoc/boxed.rs:746 [INFO] [stderr] 51: 0x7f0246755130 - std::sys_common::thread::start_thread::h29182470b6ce6639 [INFO] [stderr] at src/libstd/sys_common/thread.rs:13 [INFO] [stderr] 52: 0x7f0246755130 - std::sys::unix::thread::Thread::new::thread_start::had2013a81613ef8d [INFO] [stderr] at src/libstd/sys/unix/thread.rs:79 [INFO] [stderr] 53: 0x7f02464c74a4 - start_thread [INFO] [stderr] 54: 0x7f0245dfdd0f - __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 (8ec8125be 2019-06-25) 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] error: Could not compile `rust_learning`. [INFO] [stderr] [INFO] [stderr] To learn more, run the command again with --verbose. [INFO] running `"docker" "inspect" "f52c57782589a627a67f76a7ff1889f6b239bbdedf10b9e4994b033c1e35669d"` [INFO] running `"docker" "rm" "-f" "f52c57782589a627a67f76a7ff1889f6b239bbdedf10b9e4994b033c1e35669d"` [INFO] [stdout] f52c57782589a627a67f76a7ff1889f6b239bbdedf10b9e4994b033c1e35669d