[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 try#8f81d0bf6baf07b92f1246696722485c4ca0b049 for pr-62008 [INFO] running `"docker" "create" "-v" "/mnt/big/ec2-user/crater/work/local/target-dirs/pr-62008/worker-6/try#8f81d0bf6baf07b92f1246696722485c4ca0b049:/opt/crater/target:rw,Z" "-v" "/mnt/big/ec2-user/crater/work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/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" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "check" "--frozen" "--all" "--all-targets"` [INFO] [stdout] f858b99e85d6eebb8d5034abbff8e308118a59bf9c0e0ff1df5a1e7f617f0c3a [INFO] running `"docker" "start" "-a" "f858b99e85d6eebb8d5034abbff8e308118a59bf9c0e0ff1df5a1e7f617f0c3a"` [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: 0x7f32927991ab - backtrace::backtrace::libunwind::trace::h8758853b907b30fd [INFO] [stderr] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.29/src/backtrace/libunwind.rs:88 [INFO] [stderr] 1: 0x7f32927991ab - backtrace::backtrace::trace_unsynchronized::h979d07d4bfdce29c [INFO] [stderr] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.29/src/backtrace/mod.rs:66 [INFO] [stderr] 2: 0x7f32927991ab - std::sys_common::backtrace::_print::ha749bbdb811617ea [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:47 [INFO] [stderr] 3: 0x7f32927991ab - std::sys_common::backtrace::print::h86a6ff63a904e869 [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:36 [INFO] [stderr] 4: 0x7f32927991ab - std::panicking::default_hook::{{closure}}::h68500b20afb715b9 [INFO] [stderr] at src/libstd/panicking.rs:200 [INFO] [stderr] 5: 0x7f3292798e87 - std::panicking::default_hook::ha801ade4ae33c264 [INFO] [stderr] at src/libstd/panicking.rs:214 [INFO] [stderr] 6: 0x7f328fda34a1 - rustc::util::common::panic_hook::h947d13b3af280c40 [INFO] [stderr] 7: 0x7f3292799a09 - std::panicking::rust_panic_with_hook::hfb51b615c6060100 [INFO] [stderr] at src/libstd/panicking.rs:481 [INFO] [stderr] 8: 0x7f32917021f5 - std::panicking::begin_panic::hd7a6c56f6c573050 [INFO] [stderr] 9: 0x7f329171389d - rustc_borrowck::borrowck::check_loans::CheckLoanCtxt::report_error_if_loans_conflict::hd3b3be88f0f8a671 [INFO] [stderr] 10: 0x7f32916fe45e - rustc_borrowck::dataflow::DataFlowContext::each_bit_on_entry::h8b05d98e728b4110 [INFO] [stderr] 11: 0x7f3291712c70 - ::borrow::h68d1dca51116634f [INFO] [stderr] 12: 0x7f328fd7323b - rustc::middle::expr_use_visitor::ExprUseVisitor::walk_expr::h9501ac9f05747d68 [INFO] [stderr] 13: 0x7f328fd7295d - rustc::middle::expr_use_visitor::ExprUseVisitor::consume_expr::h6ff01015229ee25c [INFO] [stderr] 14: 0x7f328fd73a03 - rustc::middle::expr_use_visitor::ExprUseVisitor::walk_expr::h9501ac9f05747d68 [INFO] [stderr] 15: 0x7f328fd7295d - rustc::middle::expr_use_visitor::ExprUseVisitor::consume_expr::h6ff01015229ee25c [INFO] [stderr] 16: 0x7f328fd74166 - rustc::middle::expr_use_visitor::ExprUseVisitor::walk_expr::h9501ac9f05747d68 [INFO] [stderr] 17: 0x7f328fd7295d - rustc::middle::expr_use_visitor::ExprUseVisitor::consume_expr::h6ff01015229ee25c [INFO] [stderr] 18: 0x7f328fd74206 - rustc::middle::expr_use_visitor::ExprUseVisitor::walk_expr::h9501ac9f05747d68 [INFO] [stderr] 19: 0x7f328fd7295d - rustc::middle::expr_use_visitor::ExprUseVisitor::consume_expr::h6ff01015229ee25c [INFO] [stderr] 20: 0x7f3291713582 - rustc_borrowck::borrowck::check_loans::check_loans::ha0bf631454ae0334 [INFO] [stderr] 21: 0x7f3291720062 - rustc_borrowck::borrowck::borrowck::hedccdfba24ec62c6 [INFO] [stderr] 22: 0x7f3291034e50 - rustc::ty::query::__query_compute::borrowck::h3a3af51cb0b06835 [INFO] [stderr] 23: 0x7f329133902d - rustc::ty::query::::compute::h12cccd7cc54cafd7 [INFO] [stderr] 24: 0x7f32910b263e - rustc::dep_graph::graph::DepGraph::with_task_impl::hada0fda97fa93e2d [INFO] [stderr] 25: 0x7f329137700d - rustc::ty::query::plumbing::::get_query::h71694bc10ae73a43 [INFO] [stderr] 26: 0x7f32910ff0fa - rustc_mir::borrow_check::do_mir_borrowck::hac13427b3fdd968a [INFO] [stderr] 27: 0x7f32913c21bd - rustc::ty::context::GlobalCtxt::enter_local::hc354397da93fcd45 [INFO] [stderr] 28: 0x7f32910fc00a - rustc_mir::borrow_check::mir_borrowck::hbcbc5bd25bc4f283 [INFO] [stderr] 29: 0x7f3291a61b67 - rustc::ty::query::__query_compute::mir_borrowck::hdc81384188bdb8e7 [INFO] [stderr] 30: 0x7f3291a725c5 - rustc::ty::query::::compute::h329bbbdf10d1f099 [INFO] [stderr] 31: 0x7f3291aa4b31 - rustc::dep_graph::graph::DepGraph::with_task_impl::h744ad492161b3aa9 [INFO] [stderr] 32: 0x7f3291a8ec66 - rustc::ty::query::plumbing::::get_query::hf89b8f25b37a7f9a [INFO] [stderr] 33: 0x7f3291a722b3 - rustc::ty::::par_body_owners::habe592454318c3ac [INFO] [stderr] 34: 0x7f3291a2fd5e - rustc::util::common::time::ha6adf8ba693c5aef [INFO] [stderr] 35: 0x7f32919eb072 - rustc_interface::passes::analysis::h0c6f1ecf3f8f71fc [INFO] [stderr] 36: 0x7f3292a5ce46 - rustc::ty::query::__query_compute::analysis::hcc26abdd3b3411e8 [INFO] [stderr] 37: 0x7f3292a5cb99 - rustc::ty::query::::compute::hbe2d4b8b0a4cfe77 [INFO] [stderr] 38: 0x7f3292af1533 - rustc::dep_graph::graph::DepGraph::with_task_impl::heb8f4d85c6d6bb26 [INFO] [stderr] 39: 0x7f3292a626d2 - rustc::ty::query::plumbing::::get_query::hf4781ea9acb6d2d3 [INFO] [stderr] 40: 0x7f3292a639a6 - rustc::ty::context::tls::enter_global::h7947726542a31a11 [INFO] [stderr] 41: 0x7f3292a67f07 - rustc_interface::passes::BoxedGlobalCtxt::access::{{closure}}::h43115e87b6f3f604 [INFO] [stderr] 42: 0x7f3291a3338a - rustc_interface::passes::create_global_ctxt::{{closure}}::hd2f76554d981d6b8 [INFO] [stderr] 43: 0x7f3292a69208 - rustc_interface::interface::run_compiler_in_existing_thread_pool::ha9b2b0bc21d23e40 [INFO] [stderr] 44: 0x7f3292a8b7f2 - std::thread::local::LocalKey::with::h47a8067878e162ff [INFO] [stderr] 45: 0x7f3292a9f4d1 - scoped_tls::ScopedKey::set::h5041b5165d1723b1 [INFO] [stderr] 46: 0x7f3292ab7194 - syntax::with_globals::h192e028c1f479dc5 [INFO] [stderr] 47: 0x7f3292ae22cd - std::sys_common::backtrace::__rust_begin_short_backtrace::h71bdd74d5245be4e [INFO] [stderr] 48: 0x7f32927aa46a - __rust_maybe_catch_panic [INFO] [stderr] at src/libpanic_unwind/lib.rs:82 [INFO] [stderr] 49: 0x7f3292a6ba39 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h4c2445d36252c142 [INFO] [stderr] 50: 0x7f329277ce2f - as core::ops::function::FnOnce>::call_once::h0fdc968c05701c87 [INFO] [stderr] at /rustc/8f81d0bf6baf07b92f1246696722485c4ca0b049/src/liballoc/boxed.rs:746 [INFO] [stderr] 51: 0x7f32927a9150 - as core::ops::function::FnOnce>::call_once::hf843555d9d63ec58 [INFO] [stderr] at /rustc/8f81d0bf6baf07b92f1246696722485c4ca0b049/src/liballoc/boxed.rs:746 [INFO] [stderr] 52: 0x7f32927a9150 - std::sys_common::thread::start_thread::h52ef251f7393550c [INFO] [stderr] at src/libstd/sys_common/thread.rs:13 [INFO] [stderr] 53: 0x7f32927a9150 - std::sys::unix::thread::Thread::new::thread_start::h65da545bff9d2030 [INFO] [stderr] at src/libstd/sys/unix/thread.rs:79 [INFO] [stderr] 54: 0x7f329251b4a4 - start_thread [INFO] [stderr] 55: 0x7f3291e51d0f - __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 (8f81d0bf6 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] warning: build failed, waiting for other jobs to finish... [INFO] [stderr] 0: 0x7f7d03d791ab - backtrace::backtrace::libunwind::trace::h8758853b907b30fd [INFO] [stderr] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.29/src/backtrace/libunwind.rs:88 [INFO] [stderr] 1: 0x7f7d03d791ab - backtrace::backtrace::trace_unsynchronized::h979d07d4bfdce29c [INFO] [stderr] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.29/src/backtrace/mod.rs:66 [INFO] [stderr] 2: 0x7f7d03d791ab - std::sys_common::backtrace::_print::ha749bbdb811617ea [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:47 [INFO] [stderr] 3: 0x7f7d03d791ab - std::sys_common::backtrace::print::h86a6ff63a904e869 [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:36 [INFO] [stderr] 4: 0x7f7d03d791ab - std::panicking::default_hook::{{closure}}::h68500b20afb715b9 [INFO] [stderr] at src/libstd/panicking.rs:200 [INFO] [stderr] 5: 0x7f7d03d78e87 - std::panicking::default_hook::ha801ade4ae33c264 [INFO] [stderr] at src/libstd/panicking.rs:214 [INFO] [stderr] 6: 0x7f7d013834a1 - rustc::util::common::panic_hook::h947d13b3af280c40 [INFO] [stderr] 7: 0x7f7d03d79a09 - std::panicking::rust_panic_with_hook::hfb51b615c6060100 [INFO] [stderr] at src/libstd/panicking.rs:481 [INFO] [stderr] 8: 0x7f7d02ce21f5 - std::panicking::begin_panic::hd7a6c56f6c573050 [INFO] [stderr] 9: 0x7f7d02cf389d - rustc_borrowck::borrowck::check_loans::CheckLoanCtxt::report_error_if_loans_conflict::hd3b3be88f0f8a671 [INFO] [stderr] 10: 0x7f7d02cde45e - rustc_borrowck::dataflow::DataFlowContext::each_bit_on_entry::h8b05d98e728b4110 [INFO] [stderr] 11: 0x7f7d02cf2c70 - ::borrow::h68d1dca51116634f [INFO] [stderr] 12: 0x7f7d0135323b - rustc::middle::expr_use_visitor::ExprUseVisitor::walk_expr::h9501ac9f05747d68 [INFO] [stderr] 13: 0x7f7d0135295d - rustc::middle::expr_use_visitor::ExprUseVisitor::consume_expr::h6ff01015229ee25c [INFO] [stderr] 14: 0x7f7d01353a03 - rustc::middle::expr_use_visitor::ExprUseVisitor::walk_expr::h9501ac9f05747d68 [INFO] [stderr] 15: 0x7f7d0135295d - rustc::middle::expr_use_visitor::ExprUseVisitor::consume_expr::h6ff01015229ee25c [INFO] [stderr] 16: 0x7f7d01354166 - rustc::middle::expr_use_visitor::ExprUseVisitor::walk_expr::h9501ac9f05747d68 [INFO] [stderr] 17: 0x7f7d0135295d - rustc::middle::expr_use_visitor::ExprUseVisitor::consume_expr::h6ff01015229ee25c [INFO] [stderr] 18: 0x7f7d01354206 - rustc::middle::expr_use_visitor::ExprUseVisitor::walk_expr::h9501ac9f05747d68 [INFO] [stderr] 19: 0x7f7d0135295d - rustc::middle::expr_use_visitor::ExprUseVisitor::consume_expr::h6ff01015229ee25c [INFO] [stderr] 20: 0x7f7d02cf3582 - rustc_borrowck::borrowck::check_loans::check_loans::ha0bf631454ae0334 [INFO] [stderr] 21: 0x7f7d02d00062 - rustc_borrowck::borrowck::borrowck::hedccdfba24ec62c6 [INFO] [stderr] 22: 0x7f7d02614e50 - rustc::ty::query::__query_compute::borrowck::h3a3af51cb0b06835 [INFO] [stderr] 23: 0x7f7d0291902d - rustc::ty::query::::compute::h12cccd7cc54cafd7 [INFO] [stderr] 24: 0x7f7d0269263e - rustc::dep_graph::graph::DepGraph::with_task_impl::hada0fda97fa93e2d [INFO] [stderr] 25: 0x7f7d0295700d - rustc::ty::query::plumbing::::get_query::h71694bc10ae73a43 [INFO] [stderr] 26: 0x7f7d026df0fa - rustc_mir::borrow_check::do_mir_borrowck::hac13427b3fdd968a [INFO] [stderr] 27: 0x7f7d029a21bd - rustc::ty::context::GlobalCtxt::enter_local::hc354397da93fcd45 [INFO] [stderr] 28: 0x7f7d026dc00a - rustc_mir::borrow_check::mir_borrowck::hbcbc5bd25bc4f283 [INFO] [stderr] 29: 0x7f7d03041b67 - rustc::ty::query::__query_compute::mir_borrowck::hdc81384188bdb8e7 [INFO] [stderr] 30: 0x7f7d030525c5 - rustc::ty::query::::compute::h329bbbdf10d1f099 [INFO] [stderr] 31: 0x7f7d03084b31 - rustc::dep_graph::graph::DepGraph::with_task_impl::h744ad492161b3aa9 [INFO] [stderr] 32: 0x7f7d0306ec66 - rustc::ty::query::plumbing::::get_query::hf89b8f25b37a7f9a [INFO] [stderr] 33: 0x7f7d030522b3 - rustc::ty::::par_body_owners::habe592454318c3ac [INFO] [stderr] 34: 0x7f7d0300fd5e - rustc::util::common::time::ha6adf8ba693c5aef [INFO] [stderr] 35: 0x7f7d02fcb072 - rustc_interface::passes::analysis::h0c6f1ecf3f8f71fc [INFO] [stderr] 36: 0x7f7d0403ce46 - rustc::ty::query::__query_compute::analysis::hcc26abdd3b3411e8 [INFO] [stderr] 37: 0x7f7d0403cb99 - rustc::ty::query::::compute::hbe2d4b8b0a4cfe77 [INFO] [stderr] 38: 0x7f7d040d1533 - rustc::dep_graph::graph::DepGraph::with_task_impl::heb8f4d85c6d6bb26 [INFO] [stderr] 39: 0x7f7d040426d2 - rustc::ty::query::plumbing::::get_query::hf4781ea9acb6d2d3 [INFO] [stderr] 40: 0x7f7d040439a6 - rustc::ty::context::tls::enter_global::h7947726542a31a11 [INFO] [stderr] 41: 0x7f7d04047f07 - rustc_interface::passes::BoxedGlobalCtxt::access::{{closure}}::h43115e87b6f3f604 [INFO] [stderr] 42: 0x7f7d0301338a - rustc_interface::passes::create_global_ctxt::{{closure}}::hd2f76554d981d6b8 [INFO] [stderr] 43: 0x7f7d04049208 - rustc_interface::interface::run_compiler_in_existing_thread_pool::ha9b2b0bc21d23e40 [INFO] [stderr] 44: 0x7f7d0406b7f2 - std::thread::local::LocalKey::with::h47a8067878e162ff [INFO] [stderr] 45: 0x7f7d0407f4d1 - scoped_tls::ScopedKey::set::h5041b5165d1723b1 [INFO] [stderr] 46: 0x7f7d04097194 - syntax::with_globals::h192e028c1f479dc5 [INFO] [stderr] 47: 0x7f7d040c22cd - std::sys_common::backtrace::__rust_begin_short_backtrace::h71bdd74d5245be4e [INFO] [stderr] 48: 0x7f7d03d8a46a - __rust_maybe_catch_panic [INFO] [stderr] at src/libpanic_unwind/lib.rs:82 [INFO] [stderr] 49: 0x7f7d0404ba39 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h4c2445d36252c142 [INFO] [stderr] 50: 0x7f7d03d5ce2f - as core::ops::function::FnOnce>::call_once::h0fdc968c05701c87 [INFO] [stderr] at /rustc/8f81d0bf6baf07b92f1246696722485c4ca0b049/src/liballoc/boxed.rs:746 [INFO] [stderr] 51: 0x7f7d03d89150 - as core::ops::function::FnOnce>::call_once::hf843555d9d63ec58 [INFO] [stderr] at /rustc/8f81d0bf6baf07b92f1246696722485c4ca0b049/src/liballoc/boxed.rs:746 [INFO] [stderr] 52: 0x7f7d03d89150 - std::sys_common::thread::start_thread::h52ef251f7393550c [INFO] [stderr] at src/libstd/sys_common/thread.rs:13 [INFO] [stderr] 53: 0x7f7d03d89150 - std::sys::unix::thread::Thread::new::thread_start::h65da545bff9d2030 [INFO] [stderr] at src/libstd/sys/unix/thread.rs:79 [INFO] [stderr] 54: 0x7f7d03afb4a4 - start_thread [INFO] [stderr] 55: 0x7f7d03431d0f - __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 (8f81d0bf6 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] [INFO] [stderr] To learn more, run the command again with --verbose. [INFO] running `"docker" "inspect" "f858b99e85d6eebb8d5034abbff8e308118a59bf9c0e0ff1df5a1e7f617f0c3a"` [INFO] running `"docker" "rm" "-f" "f858b99e85d6eebb8d5034abbff8e308118a59bf9c0e0ff1df5a1e7f617f0c3a"` [INFO] [stdout] f858b99e85d6eebb8d5034abbff8e308118a59bf9c0e0ff1df5a1e7f617f0c3a