[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-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/ruggeri/rust_learning"` [INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/ruggeri/rust_learning'... [INFO] [stderr] done. [INFO] running `"git" "clone" "work/cache/sources/gh/ruggeri/rust_learning" "work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/ruggeri/rust_learning"` [INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/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#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1 [INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] validating manifest of ruggeri/rust_learning on toolchain try#8f81d0bf6baf07b92f1246696722485c4ca0b049 [INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-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-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/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-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/ruggeri/rust_learning/Cargo.toml [INFO] crate ruggeri/rust_learning already has a lockfile, it will not be regenerated [INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] checking ruggeri/rust_learning against master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1 for pr-62008 [INFO] running `"docker" "create" "-v" "/mnt/big/ec2-user/crater/work/local/target-dirs/pr-62008/worker-6/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1:/opt/crater/target:rw,Z" "-v" "/mnt/big/ec2-user/crater/work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/ruggeri/rust_learning:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/ec2-user/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/ec2-user/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" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "check" "--frozen" "--all" "--all-targets"` [INFO] [stdout] 82f3af1dff8f9ecc3f733b6c02b18237da8f4e73179ff9079e7aa8d8a1deed0c [INFO] running `"docker" "start" "-a" "82f3af1dff8f9ecc3f733b6c02b18237da8f4e73179ff9079e7aa8d8a1deed0c"` [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: 0x7fea27edb1bb - backtrace::backtrace::libunwind::trace::h3eb7dec79b0cb248 [INFO] [stderr] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.29/src/backtrace/libunwind.rs:88 [INFO] [stderr] 1: 0x7fea27edb1bb - backtrace::backtrace::trace_unsynchronized::h828522acfd8fecfd [INFO] [stderr] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.29/src/backtrace/mod.rs:66 [INFO] [stderr] 2: 0x7fea27edb1bb - std::sys_common::backtrace::_print::ha50329dede3e270e [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:47 [INFO] [stderr] 3: 0x7fea27edb1bb - std::sys_common::backtrace::print::ha6d7f96740481555 [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:36 [INFO] [stderr] 4: 0x7fea27edb1bb - std::panicking::default_hook::{{closure}}::h48c4812e51e499b0 [INFO] [stderr] at src/libstd/panicking.rs:200 [INFO] [stderr] 5: 0x7fea27edae97 - std::panicking::default_hook::h5d25d0fa83093442 [INFO] [stderr] at src/libstd/panicking.rs:214 [INFO] [stderr] 6: 0x7fea254e3ba1 - rustc::util::common::panic_hook::hb560d8eeda623d6b [INFO] [stderr] 7: 0x7fea27edba19 - std::panicking::rust_panic_with_hook::h1babb2b4ac73106c [INFO] [stderr] at src/libstd/panicking.rs:481 [INFO] [stderr] 8: 0x7fea26e43d55 - std::panicking::begin_panic::h8b8542fd12a72d18 [INFO] [stderr] 9: 0x7fea26e5549d - rustc_borrowck::borrowck::check_loans::CheckLoanCtxt::report_error_if_loans_conflict::h24ff21c37ed666d0 [INFO] [stderr] 10: 0x7fea26e40abe - rustc_borrowck::dataflow::DataFlowContext::each_bit_on_entry::hd1206efbbc05c337 [INFO] [stderr] 11: 0x7fea26e54870 - ::borrow::h33a2af37b8227f9a [INFO] [stderr] 12: 0x7fea254b397b - rustc::middle::expr_use_visitor::ExprUseVisitor::walk_expr::h9b0f7c32ea7aebad [INFO] [stderr] 13: 0x7fea254b309d - rustc::middle::expr_use_visitor::ExprUseVisitor::consume_expr::hc51524c6175a4556 [INFO] [stderr] 14: 0x7fea254b4143 - rustc::middle::expr_use_visitor::ExprUseVisitor::walk_expr::h9b0f7c32ea7aebad [INFO] [stderr] 15: 0x7fea254b309d - rustc::middle::expr_use_visitor::ExprUseVisitor::consume_expr::hc51524c6175a4556 [INFO] [stderr] 16: 0x7fea254b48a6 - rustc::middle::expr_use_visitor::ExprUseVisitor::walk_expr::h9b0f7c32ea7aebad [INFO] [stderr] 17: 0x7fea254b309d - rustc::middle::expr_use_visitor::ExprUseVisitor::consume_expr::hc51524c6175a4556 [INFO] [stderr] 18: 0x7fea254b4946 - rustc::middle::expr_use_visitor::ExprUseVisitor::walk_expr::h9b0f7c32ea7aebad [INFO] [stderr] 19: 0x7fea254b309d - rustc::middle::expr_use_visitor::ExprUseVisitor::consume_expr::hc51524c6175a4556 [INFO] [stderr] 20: 0x7fea26e55182 - rustc_borrowck::borrowck::check_loans::check_loans::h53a101e2e07d258b [INFO] [stderr] 21: 0x7fea26e61fe2 - rustc_borrowck::borrowck::borrowck::hd12f574b4fbf9c68 [INFO] [stderr] 22: 0x7fea26776840 - rustc::ty::query::__query_compute::borrowck::hfa5fdd7d961e625a [INFO] [stderr] 23: 0x7fea26a7b2cd - rustc::ty::query::::compute::h3877d26e6b2017df [INFO] [stderr] 24: 0x7fea267e66fe - rustc::dep_graph::graph::DepGraph::with_task_impl::h1172530971fa218a [INFO] [stderr] 25: 0x7fea26aee1bd - rustc::ty::query::plumbing::::get_query::hd48b017080d95f07 [INFO] [stderr] 26: 0x7fea26840aea - rustc_mir::borrow_check::do_mir_borrowck::h237de118f4b1341d [INFO] [stderr] 27: 0x7fea26b038dd - rustc::ty::context::GlobalCtxt::enter_local::h3018849cf4540ba7 [INFO] [stderr] 28: 0x7fea2683d9fa - rustc_mir::borrow_check::mir_borrowck::hb2089efd67da24ea [INFO] [stderr] 29: 0x7fea271a3b47 - rustc::ty::query::__query_compute::mir_borrowck::h25a921693b22bd06 [INFO] [stderr] 30: 0x7fea271b4695 - rustc::ty::query::::compute::h0e77b0ecf8272fc0 [INFO] [stderr] 31: 0x7fea271e7f71 - rustc::dep_graph::graph::DepGraph::with_task_impl::hdd69d187536ce455 [INFO] [stderr] 32: 0x7fea271ca676 - rustc::ty::query::plumbing::::get_query::h82e22d26bf23b2a3 [INFO] [stderr] 33: 0x7fea271b4383 - rustc::ty::::par_body_owners::hb0bc009f581135a8 [INFO] [stderr] 34: 0x7fea2716fd1e - rustc::util::common::time::h1d17db531917c9bd [INFO] [stderr] 35: 0x7fea2712c1b2 - rustc_interface::passes::analysis::h868b726353841c87 [INFO] [stderr] 36: 0x7fea28230be6 - rustc::ty::query::__query_compute::analysis::h3e510fc04371ee92 [INFO] [stderr] 37: 0x7fea2819f339 - rustc::ty::query::::compute::h5ca4b9f106abce4e [INFO] [stderr] 38: 0x7fea282332e3 - rustc::dep_graph::graph::DepGraph::with_task_impl::h4496a0ed7e3ab841 [INFO] [stderr] 39: 0x7fea281a4ba2 - rustc::ty::query::plumbing::::get_query::hfb799b8e684a884e [INFO] [stderr] 40: 0x7fea281a60f6 - rustc::ty::context::tls::enter_global::heda02a983177742f [INFO] [stderr] 41: 0x7fea281aa437 - rustc_interface::passes::BoxedGlobalCtxt::access::{{closure}}::heca8a67585f24237 [INFO] [stderr] 42: 0x7fea2717438a - rustc_interface::passes::create_global_ctxt::{{closure}}::h2810e2420fa1b1a3 [INFO] [stderr] 43: 0x7fea281abf18 - rustc_interface::interface::run_compiler_in_existing_thread_pool::hc192e5878094cb7b [INFO] [stderr] 44: 0x7fea281cdfe2 - std::thread::local::LocalKey::with::ha6b763b1b8495c09 [INFO] [stderr] 45: 0x7fea281e1a71 - scoped_tls::ScopedKey::set::h2c46bd2717f81c2d [INFO] [stderr] 46: 0x7fea281f9ee4 - syntax::with_globals::ha98e5221ba233b36 [INFO] [stderr] 47: 0x7fea2819ae1d - std::sys_common::backtrace::__rust_begin_short_backtrace::h67729b658689cfad [INFO] [stderr] 48: 0x7fea27eec47a - __rust_maybe_catch_panic [INFO] [stderr] at src/libpanic_unwind/lib.rs:82 [INFO] [stderr] 49: 0x7fea281adf09 - core::ops::function::FnOnce::call_once{{vtable.shim}}::ha3fdeeedabb34b72 [INFO] [stderr] 50: 0x7fea27ebee3f - as core::ops::function::FnOnce>::call_once::h9a647863bd3e20b6 [INFO] [stderr] at /rustc/848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/src/liballoc/boxed.rs:746 [INFO] [stderr] 51: 0x7fea27eeb160 - as core::ops::function::FnOnce>::call_once::hf5782bf1cb98f21e [INFO] [stderr] at /rustc/848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/src/liballoc/boxed.rs:746 [INFO] [stderr] 52: 0x7fea27eeb160 - std::sys_common::thread::start_thread::he4156f3e5b9bd092 [INFO] [stderr] at src/libstd/sys_common/thread.rs:13 [INFO] [stderr] 53: 0x7fea27eeb160 - std::sys::unix::thread::Thread::new::thread_start::hd671df18312135fd [INFO] [stderr] at src/libstd/sys/unix/thread.rs:79 [INFO] [stderr] 54: 0x7fea27c5d4a4 - start_thread [INFO] [stderr] 55: 0x7fea27593d0f - __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 (848e0a23f 2019-07-02) 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] warning: build failed, waiting for other jobs to finish... [INFO] [stderr] 0: 0x7f0313de91bb - backtrace::backtrace::libunwind::trace::h3eb7dec79b0cb248 [INFO] [stderr] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.29/src/backtrace/libunwind.rs:88 [INFO] [stderr] 1: 0x7f0313de91bb - backtrace::backtrace::trace_unsynchronized::h828522acfd8fecfd [INFO] [stderr] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.29/src/backtrace/mod.rs:66 [INFO] [stderr] 2: 0x7f0313de91bb - std::sys_common::backtrace::_print::ha50329dede3e270e [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:47 [INFO] [stderr] 3: 0x7f0313de91bb - std::sys_common::backtrace::print::ha6d7f96740481555 [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:36 [INFO] [stderr] 4: 0x7f0313de91bb - std::panicking::default_hook::{{closure}}::h48c4812e51e499b0 [INFO] [stderr] at src/libstd/panicking.rs:200 [INFO] [stderr] 5: 0x7f0313de8e97 - std::panicking::default_hook::h5d25d0fa83093442 [INFO] [stderr] at src/libstd/panicking.rs:214 [INFO] [stderr] 6: 0x7f03113f1ba1 - rustc::util::common::panic_hook::hb560d8eeda623d6b [INFO] [stderr] 7: 0x7f0313de9a19 - std::panicking::rust_panic_with_hook::h1babb2b4ac73106c [INFO] [stderr] at src/libstd/panicking.rs:481 [INFO] [stderr] 8: 0x7f0312d51d55 - std::panicking::begin_panic::h8b8542fd12a72d18 [INFO] [stderr] 9: 0x7f0312d6349d - rustc_borrowck::borrowck::check_loans::CheckLoanCtxt::report_error_if_loans_conflict::h24ff21c37ed666d0 [INFO] [stderr] 10: 0x7f0312d4eabe - rustc_borrowck::dataflow::DataFlowContext::each_bit_on_entry::hd1206efbbc05c337 [INFO] [stderr] 11: 0x7f0312d62870 - ::borrow::h33a2af37b8227f9a [INFO] [stderr] 12: 0x7f03113c197b - rustc::middle::expr_use_visitor::ExprUseVisitor::walk_expr::h9b0f7c32ea7aebad [INFO] [stderr] 13: 0x7f03113c109d - rustc::middle::expr_use_visitor::ExprUseVisitor::consume_expr::hc51524c6175a4556 [INFO] [stderr] 14: 0x7f03113c2143 - rustc::middle::expr_use_visitor::ExprUseVisitor::walk_expr::h9b0f7c32ea7aebad [INFO] [stderr] 15: 0x7f03113c109d - rustc::middle::expr_use_visitor::ExprUseVisitor::consume_expr::hc51524c6175a4556 [INFO] [stderr] 16: 0x7f03113c28a6 - rustc::middle::expr_use_visitor::ExprUseVisitor::walk_expr::h9b0f7c32ea7aebad [INFO] [stderr] 17: 0x7f03113c109d - rustc::middle::expr_use_visitor::ExprUseVisitor::consume_expr::hc51524c6175a4556 [INFO] [stderr] 18: 0x7f03113c2946 - rustc::middle::expr_use_visitor::ExprUseVisitor::walk_expr::h9b0f7c32ea7aebad [INFO] [stderr] 19: 0x7f03113c109d - rustc::middle::expr_use_visitor::ExprUseVisitor::consume_expr::hc51524c6175a4556 [INFO] [stderr] 20: 0x7f0312d63182 - rustc_borrowck::borrowck::check_loans::check_loans::h53a101e2e07d258b [INFO] [stderr] 21: 0x7f0312d6ffe2 - rustc_borrowck::borrowck::borrowck::hd12f574b4fbf9c68 [INFO] [stderr] 22: 0x7f0312684840 - rustc::ty::query::__query_compute::borrowck::hfa5fdd7d961e625a [INFO] [stderr] 23: 0x7f03129892cd - rustc::ty::query::::compute::h3877d26e6b2017df [INFO] [stderr] 24: 0x7f03126f46fe - rustc::dep_graph::graph::DepGraph::with_task_impl::h1172530971fa218a [INFO] [stderr] 25: 0x7f03129fc1bd - rustc::ty::query::plumbing::::get_query::hd48b017080d95f07 [INFO] [stderr] 26: 0x7f031274eaea - rustc_mir::borrow_check::do_mir_borrowck::h237de118f4b1341d [INFO] [stderr] 27: 0x7f0312a118dd - rustc::ty::context::GlobalCtxt::enter_local::h3018849cf4540ba7 [INFO] [stderr] 28: 0x7f031274b9fa - rustc_mir::borrow_check::mir_borrowck::hb2089efd67da24ea [INFO] [stderr] 29: 0x7f03130b1b47 - rustc::ty::query::__query_compute::mir_borrowck::h25a921693b22bd06 [INFO] [stderr] 30: 0x7f03130c2695 - rustc::ty::query::::compute::h0e77b0ecf8272fc0 [INFO] [stderr] 31: 0x7f03130f5f71 - rustc::dep_graph::graph::DepGraph::with_task_impl::hdd69d187536ce455 [INFO] [stderr] 32: 0x7f03130d8676 - rustc::ty::query::plumbing::::get_query::h82e22d26bf23b2a3 [INFO] [stderr] 33: 0x7f03130c2383 - rustc::ty::::par_body_owners::hb0bc009f581135a8 [INFO] [stderr] 34: 0x7f031307dd1e - rustc::util::common::time::h1d17db531917c9bd [INFO] [stderr] 35: 0x7f031303a1b2 - rustc_interface::passes::analysis::h868b726353841c87 [INFO] [stderr] 36: 0x7f031413ebe6 - rustc::ty::query::__query_compute::analysis::h3e510fc04371ee92 [INFO] [stderr] 37: 0x7f03140ad339 - rustc::ty::query::::compute::h5ca4b9f106abce4e [INFO] [stderr] 38: 0x7f03141412e3 - rustc::dep_graph::graph::DepGraph::with_task_impl::h4496a0ed7e3ab841 [INFO] [stderr] 39: 0x7f03140b2ba2 - rustc::ty::query::plumbing::::get_query::hfb799b8e684a884e [INFO] [stderr] 40: 0x7f03140b40f6 - rustc::ty::context::tls::enter_global::heda02a983177742f [INFO] [stderr] 41: 0x7f03140b8437 - rustc_interface::passes::BoxedGlobalCtxt::access::{{closure}}::heca8a67585f24237 [INFO] [stderr] 42: 0x7f031308238a - rustc_interface::passes::create_global_ctxt::{{closure}}::h2810e2420fa1b1a3 [INFO] [stderr] 43: 0x7f03140b9f18 - rustc_interface::interface::run_compiler_in_existing_thread_pool::hc192e5878094cb7b [INFO] [stderr] 44: 0x7f03140dbfe2 - std::thread::local::LocalKey::with::ha6b763b1b8495c09 [INFO] [stderr] 45: 0x7f03140efa71 - scoped_tls::ScopedKey::set::h2c46bd2717f81c2d [INFO] [stderr] 46: 0x7f0314107ee4 - syntax::with_globals::ha98e5221ba233b36 [INFO] [stderr] 47: 0x7f03140a8e1d - std::sys_common::backtrace::__rust_begin_short_backtrace::h67729b658689cfad [INFO] [stderr] 48: 0x7f0313dfa47a - __rust_maybe_catch_panic [INFO] [stderr] at src/libpanic_unwind/lib.rs:82 [INFO] [stderr] 49: 0x7f03140bbf09 - core::ops::function::FnOnce::call_once{{vtable.shim}}::ha3fdeeedabb34b72 [INFO] [stderr] 50: 0x7f0313dcce3f - as core::ops::function::FnOnce>::call_once::h9a647863bd3e20b6 [INFO] [stderr] at /rustc/848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/src/liballoc/boxed.rs:746 [INFO] [stderr] 51: 0x7f0313df9160 - as core::ops::function::FnOnce>::call_once::hf5782bf1cb98f21e [INFO] [stderr] at /rustc/848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/src/liballoc/boxed.rs:746 [INFO] [stderr] 52: 0x7f0313df9160 - std::sys_common::thread::start_thread::he4156f3e5b9bd092 [INFO] [stderr] at src/libstd/sys_common/thread.rs:13 [INFO] [stderr] 53: 0x7f0313df9160 - std::sys::unix::thread::Thread::new::thread_start::hd671df18312135fd [INFO] [stderr] at src/libstd/sys/unix/thread.rs:79 [INFO] [stderr] 54: 0x7f0313b6b4a4 - start_thread [INFO] [stderr] 55: 0x7f03134a1d0f - __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 (848e0a23f 2019-07-02) 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] [INFO] [stderr] To learn more, run the command again with --verbose. [INFO] running `"docker" "inspect" "82f3af1dff8f9ecc3f733b6c02b18237da8f4e73179ff9079e7aa8d8a1deed0c"` [INFO] running `"docker" "rm" "-f" "82f3af1dff8f9ecc3f733b6c02b18237da8f4e73179ff9079e7aa8d8a1deed0c"` [INFO] [stdout] 82f3af1dff8f9ecc3f733b6c02b18237da8f4e73179ff9079e7aa8d8a1deed0c