[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] eea9e09cb47cdf327fbb6344d11a8c710b5a0149 [INFO] checking perlindgren/array_list against master#39b841dfe36f90a7cd111e7f0c55f32594f6e578 for pr-77035 [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 39b841dfe36f90a7cd111e7f0c55f32594f6e578 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+39b841dfe36f90a7cd111e7f0c55f32594f6e578" "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" "+39b841dfe36f90a7cd111e7f0c55f32594f6e578" "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" "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" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+39b841dfe36f90a7cd111e7f0c55f32594f6e578" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] d9fb98fedef261db68e5c06982f63d7fe668c0f1d4bf638da98b26be53b9d1f7 [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" "d9fb98fedef261db68e5c06982f63d7fe668c0f1d4bf638da98b26be53b9d1f7", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "d9fb98fedef261db68e5c06982f63d7fe668c0f1d4bf638da98b26be53b9d1f7", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "d9fb98fedef261db68e5c06982f63d7fe668c0f1d4bf638da98b26be53b9d1f7", kill_on_drop: false }` [INFO] [stdout] d9fb98fedef261db68e5c06982f63d7fe668c0f1d4bf638da98b26be53b9d1f7 [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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+39b841dfe36f90a7cd111e7f0c55f32594f6e578" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 03472eb13175e704ef8cff4613d5622b77e686dde87304e8d081554950f98b60 [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" "03472eb13175e704ef8cff4613d5622b77e686dde87304e8d081554950f98b60", kill_on_drop: false }` [INFO] [stderr] Checking array_list v0.1.0 (/opt/rustwide/workdir) [INFO] [stderr] thread 'rustc' panicked at 'assertion failed: promoted.is_none()', compiler/rustc_mir/src/transform/check_consts/qualifs.rs:254:9 [INFO] [stderr] stack backtrace: [INFO] [stdout] warning: associated function is never used: `free` [INFO] [stdout] --> src/main.rs:50:8 [INFO] [stdout] | [INFO] [stdout] 50 | 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:82:8 [INFO] [stdout] | [INFO] [stdout] 82 | 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:98:8 [INFO] [stdout] | [INFO] [stdout] 98 | fn pop(&mut self) -> T { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] 0: 0x7fb2288906b7 - std::backtrace_rs::backtrace::libunwind::trace::h746c3e9529d524bc [INFO] [stderr] at /rustc/39b841dfe36f90a7cd111e7f0c55f32594f6e578/library/std/src/../../backtrace/src/backtrace/libunwind.rs:90:5 [INFO] [stderr] 1: 0x7fb2288906b7 - std::backtrace_rs::backtrace::trace_unsynchronized::h86340908ff889faa [INFO] [stderr] at /rustc/39b841dfe36f90a7cd111e7f0c55f32594f6e578/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5 [INFO] [stderr] 2: 0x7fb2288906b7 - std::sys_common::backtrace::_print_fmt::h43f85f9b18230404 [INFO] [stderr] at /rustc/39b841dfe36f90a7cd111e7f0c55f32594f6e578/library/std/src/sys_common/backtrace.rs:67:5 [INFO] [stderr] 3: 0x7fb2288906b7 - ::fmt::hc132ae1a5b5aa7cd [INFO] [stderr] at /rustc/39b841dfe36f90a7cd111e7f0c55f32594f6e578/library/std/src/sys_common/backtrace.rs:46:22 [INFO] [stderr] 4: 0x7fb2289045ac - core::fmt::write::hdf023a0036d2a25f [INFO] [stderr] at /rustc/39b841dfe36f90a7cd111e7f0c55f32594f6e578/library/core/src/fmt/mod.rs:1078:17 [INFO] [stderr] 5: 0x7fb2288826a2 - std::io::Write::write_fmt::h8580846154bcb66a [INFO] [stderr] at /rustc/39b841dfe36f90a7cd111e7f0c55f32594f6e578/library/std/src/io/mod.rs:1519:15 [INFO] [stderr] 6: 0x7fb2288943b5 - std::sys_common::backtrace::_print::h7ee55fed88d107a3 [INFO] [stderr] at /rustc/39b841dfe36f90a7cd111e7f0c55f32594f6e578/library/std/src/sys_common/backtrace.rs:49:5 [INFO] [stderr] 7: 0x7fb2288943b5 - std::sys_common::backtrace::print::h54a7d3e52a524177 [INFO] [stderr] at /rustc/39b841dfe36f90a7cd111e7f0c55f32594f6e578/library/std/src/sys_common/backtrace.rs:36:9 [INFO] [stderr] 8: 0x7fb2288943b5 - std::panicking::default_hook::{{closure}}::h60921e857bf55a40 [INFO] [stderr] at /rustc/39b841dfe36f90a7cd111e7f0c55f32594f6e578/library/std/src/panicking.rs:208:50 [INFO] [stderr] 9: 0x7fb228893f0a - std::panicking::default_hook::hf0f9afb1017317fc [INFO] [stderr] at /rustc/39b841dfe36f90a7cd111e7f0c55f32594f6e578/library/std/src/panicking.rs:225:9 [INFO] [stdout] warning: unused `std::result::Result` that must be used [INFO] [stdout] --> src/main.rs:121:9 [INFO] [stdout] | [INFO] [stdout] 121 | 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: associated function is never used: `free` [INFO] [stdout] --> src/main.rs:50:8 [INFO] [stdout] | [INFO] [stdout] 50 | 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:82:8 [INFO] [stdout] | [INFO] [stdout] 82 | 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:98:8 [INFO] [stdout] | [INFO] [stdout] 98 | 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:124:13 [INFO] [stdout] | [INFO] [stdout] 124 | 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] 10: 0x7fb22914c638 - rustc_driver::report_ice::hff78d76a39ffbb86 [INFO] [stderr] 11: 0x7fb228894cb6 - std::panicking::rust_panic_with_hook::h8d66bf42b407aaea [INFO] [stderr] at /rustc/39b841dfe36f90a7cd111e7f0c55f32594f6e578/library/std/src/panicking.rs:595:17 [INFO] [stderr] 12: 0x7fb2288947a7 - std::panicking::begin_panic_handler::{{closure}}::hde71edcd925d0c5e [INFO] [stderr] at /rustc/39b841dfe36f90a7cd111e7f0c55f32594f6e578/library/std/src/panicking.rs:495:13 [INFO] [stderr] 13: 0x7fb228890b7c - std::sys_common::backtrace::__rust_end_short_backtrace::h8a3c7d6cea578919 [INFO] [stderr] at /rustc/39b841dfe36f90a7cd111e7f0c55f32594f6e578/library/std/src/sys_common/backtrace.rs:141:18 [INFO] [stderr] 14: 0x7fb228894739 - rust_begin_unwind [INFO] [stderr] at /rustc/39b841dfe36f90a7cd111e7f0c55f32594f6e578/library/std/src/panicking.rs:493:5 [INFO] [stderr] 15: 0x7fb2289009c1 - core::panicking::panic_fmt::h20225113c4a2f8fd [INFO] [stderr] at /rustc/39b841dfe36f90a7cd111e7f0c55f32594f6e578/library/core/src/panicking.rs:92:14 [INFO] [stderr] 16: 0x7fb22890090d - core::panicking::panic::h35b77276aa4b0c12 [INFO] [stderr] at /rustc/39b841dfe36f90a7cd111e7f0c55f32594f6e578/library/core/src/panicking.rs:50:5 [INFO] [stderr] 17: 0x7fb22a6aefc1 - rustc_mir::transform::check_consts::qualifs::in_operand::hcb716a78a097cdff [INFO] [stderr] 18: 0x7fb22a528c39 - rustc_mir::transform::promote_consts::Validator::qualif_local::h92146139f0a6a7b4 [INFO] [stderr] 19: 0x7fb22a529be4 - rustc_mir::transform::promote_consts::Validator::validate_local::h973a4116bbbe4667 [INFO] [stderr] 20: 0x7fb22a529bd0 - rustc_mir::transform::promote_consts::Validator::validate_local::h973a4116bbbe4667 [INFO] [stderr] 21: 0x7fb22a529984 - rustc_mir::transform::promote_consts::Validator::validate_local::h973a4116bbbe4667 [INFO] [stderr] 22: 0x7fb22a52ee75 - rustc_mir::transform::promote_consts::should_suggest_const_in_array_repeat_expressions_attribute::hd1855d2e9eed4330 [INFO] [stderr] 23: 0x7fb22a56509f - rustc_mir::borrow_check::type_check::TypeChecker::check_rvalue::h15c1cd8f500520f0 [INFO] [stderr] 24: 0x7fb22a568315 - rustc_mir::borrow_check::type_check::TypeChecker::typeck_mir::h3fa30b3c7d19766c [INFO] [stderr] 25: 0x7fb22a55b51a - rustc_mir::borrow_check::type_check::type_check::hf23dfdbc23915bfd [INFO] [stderr] 26: 0x7fb22a8a0c7a - rustc_mir::borrow_check::nll::compute_regions::h6724526dd9a6570d [INFO] [stderr] 27: 0x7fb22aa41ca1 - rustc_mir::borrow_check::do_mir_borrowck::h3d752c9d0437bc32 [INFO] [stderr] 28: 0x7fb22a4da736 - rustc_infer::infer::InferCtxtBuilder::enter::hf3ed00b836abf33a [INFO] [stderr] 29: 0x7fb22aa40edb - rustc_mir::borrow_check::mir_borrowck::h8fcfde9d3bc3965f [INFO] [stderr] 30: 0x7fb22aa14147 - core::ops::function::FnOnce::call_once::hda8d7f4d3e0163df [INFO] [stderr] 31: 0x7fb22939109e - rustc_middle::ty::query:: for rustc_middle::ty::query::queries::mir_borrowck>::compute::h6c5455464ebb9737 [INFO] [stderr] 32: 0x7fb22934ac00 - rustc_query_system::dep_graph::graph::DepGraph::with_task_impl::h5c4a029b2aaaad43 [INFO] [stderr] 33: 0x7fb22939234b - rustc_data_structures::stack::ensure_sufficient_stack::h0ec271e889f1b221 [INFO] [stderr] 34: 0x7fb22932dbb7 - rustc_query_system::query::plumbing::get_query_impl::h780e1793a19b633f [INFO] [stderr] 35: 0x7fb22933e549 - rustc_query_system::query::plumbing::ensure_query_impl::hac52838f4bbe8a0d [INFO] [stderr] 36: 0x7fb229368339 - rustc_session::utils::::time::h1b0e95cbe477ae94 [INFO] [stderr] 37: 0x7fb2293ad8b2 - rustc_interface::passes::analysis::h34f9b972d8af6f3d [INFO] [stderr] 38: 0x7fb2291b779b - rustc_middle::ty::query:: for rustc_middle::ty::query::queries::analysis>::compute::h95ff81a8a73eaff3 [INFO] [stderr] 39: 0x7fb229194f06 - rustc_query_system::dep_graph::graph::DepGraph::with_eval_always_task::h05a5aa3f40ff3b2d [INFO] [stderr] 40: 0x7fb2291a8836 - rustc_data_structures::stack::ensure_sufficient_stack::h371083fbc17898bc [INFO] [stderr] 41: 0x7fb229136a05 - rustc_query_system::query::plumbing::get_query_impl::hcc63ca689fa3c69b [INFO] [stderr] 42: 0x7fb2291bc46f - rustc_interface::passes::QueryContext::enter::h2071e0a8631ee0e4 [INFO] [stderr] 43: 0x7fb2290f4c05 - rustc_interface::queries::::enter::hd899306a06575d0c [INFO] [stderr] 44: 0x7fb2291759f7 - rustc_span::with_source_map::ha4e07ff263d0dc1d [INFO] [stderr] 45: 0x7fb2290f5dfb - rustc_interface::interface::create_compiler_and_run::h1d6d732867d1f489 [INFO] [stderr] 46: 0x7fb2291a2e40 - scoped_tls::ScopedKey::set::h39c0aa543118d3f3 [INFO] [stderr] 47: 0x7fb2291a9446 - std::sys_common::backtrace::__rust_begin_short_backtrace::h1e5aa72fb9cd6d86 [INFO] [stderr] 48: 0x7fb2290fdcba - core::ops::function::FnOnce::call_once{{vtable.shim}}::hc793837e985b77ce [INFO] [stderr] 49: 0x7fb2288a46ea - as core::ops::function::FnOnce>::call_once::hea1090dbdcecbf5a [INFO] [stderr] at /rustc/39b841dfe36f90a7cd111e7f0c55f32594f6e578/library/alloc/src/boxed.rs:1328:9 [INFO] [stderr] 50: 0x7fb2288a46ea - as core::ops::function::FnOnce>::call_once::h8d5723d3912bd325 [INFO] [stderr] at /rustc/39b841dfe36f90a7cd111e7f0c55f32594f6e578/library/alloc/src/boxed.rs:1328:9 [INFO] [stderr] 51: 0x7fb2288a46ea - std::sys::unix::thread::Thread::new::thread_start::hc17a425ca2995724 [INFO] [stderr] at /rustc/39b841dfe36f90a7cd111e7f0c55f32594f6e578/library/std/src/sys/unix/thread.rs:71:17 [INFO] [stderr] 52: 0x7fb2287ba609 - start_thread [INFO] [stderr] 53: 0x7fb2286ce293 - clone [INFO] [stderr] 54: 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/issues/new?labels=C-bug%2C+I-ICE%2C+T-compiler&template=ice.md [INFO] [stderr] [INFO] [stderr] note: rustc 1.50.0-nightly (39b841dfe 2020-12-10) 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] [stdout] warning: unused `std::result::Result` that must be used [INFO] [stdout] --> src/main.rs:121:9 [INFO] [stdout] | [INFO] [stdout] 121 | 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:124:13 [INFO] [stdout] | [INFO] [stdout] 124 | 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] [stderr] #0 [mir_borrowck] borrow-checking `A` [INFO] [stderr] #1 [analysis] running analysis passes on this crate [INFO] [stderr] end of query stack [INFO] [stdout] warning: 5 warnings emitted [INFO] [stdout] [INFO] [stdout] [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" "03472eb13175e704ef8cff4613d5622b77e686dde87304e8d081554950f98b60", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "03472eb13175e704ef8cff4613d5622b77e686dde87304e8d081554950f98b60", kill_on_drop: false }` [INFO] [stdout] 03472eb13175e704ef8cff4613d5622b77e686dde87304e8d081554950f98b60