[INFO] cloning repository https://github.com/perlindgren/array_list [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/perlindgren/array_list" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fperlindgren%2Farray_list", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fperlindgren%2Farray_list'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 968b3d2e58566fdad8e28f94f8565f2495200922 [INFO] testing perlindgren/array_list against beta-2020-07-24 for beta-1.46-1 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fperlindgren%2Farray_list" "/workspace/builds/worker-4/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/perlindgren/array_list on toolchain beta-2020-07-24 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/perlindgren/array_list [INFO] finished tweaking git repo https://github.com/perlindgren/array_list [INFO] tweaked toml for git repo https://github.com/perlindgren/array_list written to /workspace/builds/worker-4/source/Cargo.toml [INFO] crate git repo https://github.com/perlindgren/array_list already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 93c15219abd5da80521ffa55d0da40e62727f2e0b26811ef66f51f72fb97df0f [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "93c15219abd5da80521ffa55d0da40e62727f2e0b26811ef66f51f72fb97df0f", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "93c15219abd5da80521ffa55d0da40e62727f2e0b26811ef66f51f72fb97df0f", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "93c15219abd5da80521ffa55d0da40e62727f2e0b26811ef66f51f72fb97df0f", kill_on_drop: false }` [INFO] [stdout] 93c15219abd5da80521ffa55d0da40e62727f2e0b26811ef66f51f72fb97df0f [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 7b9b1a6a39a4ae179203ca2e4a86c51c346d245550ca6d5663b07df9abce58bb [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "7b9b1a6a39a4ae179203ca2e4a86c51c346d245550ca6d5663b07df9abce58bb", kill_on_drop: false }` [INFO] [stderr] Compiling array_list v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: associated function is never used: `free` [INFO] [stdout] --> src/main.rs:48:8 [INFO] [stdout] | [INFO] [stdout] 48 | fn free(&mut self, i: u8) { [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `push` [INFO] [stdout] --> src/main.rs:78:8 [INFO] [stdout] | [INFO] [stdout] 78 | fn push(&mut self, v: T) { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `pop` [INFO] [stdout] --> src/main.rs:92:8 [INFO] [stdout] | [INFO] [stdout] 92 | fn pop(&mut self) -> T { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `std::result::Result` that must be used [INFO] [stdout] --> src/main.rs:115:9 [INFO] [stdout] | [INFO] [stdout] 115 | write!(f, "List :"); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `std::result::Result` that must be used [INFO] [stdout] --> src/main.rs:118:13 [INFO] [stdout] | [INFO] [stdout] 118 | write!(f, "{:?}, ", self.nodes[i as usize].data); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 5 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 0.91s [INFO] running `Command { std: "docker" "inspect" "7b9b1a6a39a4ae179203ca2e4a86c51c346d245550ca6d5663b07df9abce58bb", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "7b9b1a6a39a4ae179203ca2e4a86c51c346d245550ca6d5663b07df9abce58bb", kill_on_drop: false }` [INFO] [stdout] 7b9b1a6a39a4ae179203ca2e4a86c51c346d245550ca6d5663b07df9abce58bb [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 227998a145b3d9b0f1c9ffe6d88a8715469845db8016a2007852df79c1de6bd6 [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "227998a145b3d9b0f1c9ffe6d88a8715469845db8016a2007852df79c1de6bd6", kill_on_drop: false }` [INFO] [stderr] Compiling array_list v0.1.0 (/opt/rustwide/workdir) [INFO] [stderr] thread 'rustc' panicked at 'assertion failed: promoted.is_none()', src/librustc_mir/transform/check_consts/qualifs.rs:248:9 [INFO] [stderr] stack backtrace: [INFO] [stdout] warning: associated function is never used: `free` [INFO] [stdout] --> src/main.rs:48:8 [INFO] [stdout] | [INFO] [stdout] 48 | fn free(&mut self, i: u8) { [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `push` [INFO] [stdout] --> src/main.rs:78:8 [INFO] [stdout] | [INFO] [stdout] 78 | fn push(&mut self, v: T) { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `pop` [INFO] [stdout] --> src/main.rs:92:8 [INFO] [stdout] | [INFO] [stdout] 92 | fn pop(&mut self) -> T { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `std::result::Result` that must be used [INFO] [stdout] --> src/main.rs:115:9 [INFO] [stdout] | [INFO] [stdout] 115 | write!(f, "List :"); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `std::result::Result` that must be used [INFO] [stdout] --> src/main.rs:118:13 [INFO] [stdout] | [INFO] [stdout] 118 | write!(f, "{:?}, ", self.nodes[i as usize].data); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 5 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] 0: 0x7fae7c66e8e5 - backtrace::backtrace::libunwind::trace::h5e2646fa3eddf2ea [INFO] [stderr] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/libunwind.rs:86 [INFO] [stderr] 1: 0x7fae7c66e8e5 - backtrace::backtrace::trace_unsynchronized::hb95dd7f77ce47877 [INFO] [stderr] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/mod.rs:66 [INFO] [stderr] 2: 0x7fae7c66e8e5 - std::sys_common::backtrace::_print_fmt::h5e71b67af43fd70d [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:78 [INFO] [stderr] 3: 0x7fae7c66e8e5 - ::fmt::hdb4a83d2b61107e5 [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:59 [INFO] [stderr] 4: 0x7fae7c6ab36c - core::fmt::write::ha20e7262fa3e8a7a [INFO] [stderr] at src/libcore/fmt/mod.rs:1076 [INFO] [stderr] 5: 0x7fae7c660662 - std::io::Write::write_fmt::h1aebfe8a5a79e36d [INFO] [stderr] at src/libstd/io/mod.rs:1537 [INFO] [stderr] 6: 0x7fae7c673780 - std::sys_common::backtrace::_print::h9c07314cc66ba539 [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:62 [INFO] [stderr] 7: 0x7fae7c673780 - std::sys_common::backtrace::print::hd1fd65f49a2d8544 [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:49 [INFO] [stderr] 8: 0x7fae7c673780 - std::panicking::default_hook::{{closure}}::h222da46485ab36fc [INFO] [stderr] at src/libstd/panicking.rs:198 [INFO] [stderr] 9: 0x7fae7c6734cc - std::panicking::default_hook::hc5868949d129ed00 [INFO] [stderr] at src/libstd/panicking.rs:217 [INFO] [stderr] 10: 0x7fae7cdddcd9 - rustc_driver::report_ice::he981df22d5d128c5 [INFO] [stderr] 11: 0x7fae7c673ef8 - std::panicking::rust_panic_with_hook::h26a6ab8b0993c0c8 [INFO] [stderr] at src/libstd/panicking.rs:530 [INFO] [stderr] 12: 0x7fae7e2c5bae - std::panicking::begin_panic::h7656aeaae42d94e4 [INFO] [stderr] 13: 0x7fae7e05011e - rustc_mir::transform::check_consts::qualifs::in_operand::h439609e7c757bccb [INFO] [stderr] 14: 0x7fae7e1a4ac9 - rustc_mir::transform::promote_consts::Validator::qualif_local::hf6876a8c69e656fd [INFO] [stderr] 15: 0x7fae7e1a590c - rustc_mir::transform::promote_consts::Validator::validate_local::h1af41e1e02615a88 [INFO] [stderr] 16: 0x7fae7e1a58f1 - rustc_mir::transform::promote_consts::Validator::validate_local::h1af41e1e02615a88 [INFO] [stderr] 17: 0x7fae7e1a560d - rustc_mir::transform::promote_consts::Validator::validate_local::h1af41e1e02615a88 [INFO] [stderr] 18: 0x7fae7e1aa6e5 - rustc_mir::transform::promote_consts::should_suggest_const_in_array_repeat_expressions_attribute::hff37f05dcd471213 [INFO] [stderr] 19: 0x7fae7e00026f - rustc_mir::borrow_check::type_check::TypeChecker::check_rvalue::hd16f338f37573881 [INFO] [stderr] 20: 0x7fae7e00246e - rustc_mir::borrow_check::type_check::TypeChecker::typeck_mir::h3fb4cd3b5371d622 [INFO] [stderr] 21: 0x7fae7dff490d - rustc_mir::borrow_check::type_check::type_check::h62fa8eb96fbdf395 [INFO] [stderr] 22: 0x7fae7e21424a - rustc_mir::borrow_check::nll::compute_regions::hf65f670f1ed2f3be [INFO] [stderr] 23: 0x7fae7e007211 - rustc_mir::borrow_check::do_mir_borrowck::h894a2758e370f4f1 [INFO] [stderr] 24: 0x7fae7e13eb6b - rustc_infer::infer::InferCtxtBuilder::enter::h61405c7b72c3cb3b [INFO] [stderr] 25: 0x7fae7e006671 - rustc_mir::borrow_check::mir_borrowck::h238eff348f2448c1 [INFO] [stderr] 26: 0x7fae7cfd2812 - rustc_middle::ty::query:: for rustc_middle::ty::query::queries::mir_borrowck>::compute::h16de47dde4bfba43 [INFO] [stderr] 27: 0x7fae7d02ea74 - rustc_query_system::dep_graph::graph::DepGraph::with_task_impl::hc576d597b3bd6924 [INFO] [stderr] 28: 0x7fae7cf8191c - rustc_data_structures::stack::ensure_sufficient_stack::hd9358b6bb6baa29a [INFO] [stderr] 29: 0x7fae7d0854f0 - rustc_query_system::query::plumbing::get_query_impl::hf86dc4920ee58f84 [INFO] [stderr] 30: 0x7fae7d08a569 - rustc_query_system::query::plumbing::ensure_query_impl::h827a7137f266c40c [INFO] [stderr] 31: 0x7fae7d026ff9 - rustc_session::utils::::time::h5d840cc245397860 [INFO] [stderr] 32: 0x7fae7cf7ce8b - rustc_interface::passes::analysis::ha1db7bcd18539f2d [INFO] [stderr] 33: 0x7fae7cdc5cfb - rustc_middle::ty::query:: for rustc_middle::ty::query::queries::analysis>::compute::hc042ca4974c324d3 [INFO] [stderr] 34: 0x7fae7ce3a747 - rustc_query_system::dep_graph::graph::DepGraph::with_task_impl::hda948752dd73d041 [INFO] [stderr] 35: 0x7fae7cda1070 - rustc_query_system::query::plumbing::get_query_impl::h9ed07dfcd4d7bd8e [INFO] [stderr] 36: 0x7fae7cdc659f - rustc_middle::ty::context::tls::enter_global::he852bb9cdfa246ab [INFO] [stderr] 37: 0x7fae7cd97ffa - rustc_interface::queries::::enter::h9bf1a33ef2661623 [INFO] [stderr] 38: 0x7fae7ce384b7 - rustc_span::with_source_map::h8ce64b93fd9acc69 [INFO] [stderr] 39: 0x7fae7cd99216 - rustc_interface::interface::create_compiler_and_run::h91b77216978990f1 [INFO] [stderr] 40: 0x7fae7cdc384d - scoped_tls::ScopedKey::set::h37e16efb70af8f21 [INFO] [stderr] 41: 0x7fae7cde9752 - std::sys_common::backtrace::__rust_begin_short_backtrace::h2917f228238fa734 [INFO] [stderr] 42: 0x7fae7cda70fe - core::ops::function::FnOnce::call_once{{vtable.shim}}::h782df3fd312ace52 [INFO] [stderr] 43: 0x7fae7c682cba - as core::ops::function::FnOnce>::call_once::h61c24496ae624ac5 [INFO] [stderr] at /rustc/6f959902b3103c49ca981fbc01871589c3498489/src/liballoc/boxed.rs:1081 [INFO] [stderr] 44: 0x7fae7c682cba - as core::ops::function::FnOnce>::call_once::h89548957afa14049 [INFO] [stderr] at /rustc/6f959902b3103c49ca981fbc01871589c3498489/src/liballoc/boxed.rs:1081 [INFO] [stderr] 45: 0x7fae7c682cba - std::sys::unix::thread::Thread::new::thread_start::h73903fbbff5b990e [INFO] [stderr] at src/libstd/sys/unix/thread.rs:87 [INFO] [stderr] 46: 0x7fae7c5c3609 - start_thread [INFO] [stderr] 47: 0x7fae7c4d7103 - __clone [INFO] [stderr] 48: 0x0 - [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 1.46.0-beta.2 (6f959902b 2020-07-23) running on x86_64-unknown-linux-gnu [INFO] [stderr] [INFO] [stderr] note: compiler flags: -C embed-bitcode=no -C debuginfo=2 --crate-type bin [INFO] [stderr] [INFO] [stderr] note: some of the compiler flags provided by cargo are hidden [INFO] [stderr] [INFO] [stderr] query stack during panic: [INFO] [stderr] #0 [mir_borrowck] borrow-checking `A` [INFO] [stderr] #1 [analysis] running analysis passes on this crate [INFO] [stderr] end of query stack [INFO] [stderr] error: could not compile `array_list`. [INFO] [stderr] [INFO] [stderr] To learn more, run the command again with --verbose. [INFO] running `Command { std: "docker" "inspect" "227998a145b3d9b0f1c9ffe6d88a8715469845db8016a2007852df79c1de6bd6", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "227998a145b3d9b0f1c9ffe6d88a8715469845db8016a2007852df79c1de6bd6", kill_on_drop: false }` [INFO] [stdout] 227998a145b3d9b0f1c9ffe6d88a8715469845db8016a2007852df79c1de6bd6