[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#b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18 for pr-79470 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fperlindgren%2Farray_list" "/workspace/builds/worker-2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/perlindgren/array_list on toolchain b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "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-2/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" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] [stdout] e43e62d3958ffffc55fb74826b729bf3a50b556f351dce0d72786391aadcaa61 [INFO] running `Command { std: "docker" "start" "-a" "e43e62d3958ffffc55fb74826b729bf3a50b556f351dce0d72786391aadcaa61", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "e43e62d3958ffffc55fb74826b729bf3a50b556f351dce0d72786391aadcaa61", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "e43e62d3958ffffc55fb74826b729bf3a50b556f351dce0d72786391aadcaa61", kill_on_drop: false }` [INFO] [stdout] e43e62d3958ffffc55fb74826b729bf3a50b556f351dce0d72786391aadcaa61 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 532be6711203da025656d524e06aa89c527df0a0d7dd12b0fa121aef374d618c [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" "532be6711203da025656d524e06aa89c527df0a0d7dd12b0fa121aef374d618c", 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] [stderr] 0: 0x7f6376ca1e00 - std::backtrace_rs::backtrace::libunwind::trace::h746c3e9529d524bc [INFO] [stderr] at /rustc/b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18/library/std/src/../../backtrace/src/backtrace/libunwind.rs:90:5 [INFO] [stderr] 1: 0x7f6376ca1e00 - std::backtrace_rs::backtrace::trace_unsynchronized::h86340908ff889faa [INFO] [stderr] at /rustc/b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5 [INFO] [stderr] 2: 0x7f6376ca1e00 - std::sys_common::backtrace::_print_fmt::h43f85f9b18230404 [INFO] [stderr] at /rustc/b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18/library/std/src/sys_common/backtrace.rs:67:5 [INFO] [stderr] 3: 0x7f6376ca1e00 - ::fmt::hc132ae1a5b5aa7cd [INFO] [stderr] at /rustc/b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18/library/std/src/sys_common/backtrace.rs:46:22 [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: 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] 4: 0x7f6376d14b9c - core::fmt::write::hdf023a0036d2a25f [INFO] [stderr] at /rustc/b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18/library/core/src/fmt/mod.rs:1078:17 [INFO] [stderr] 5: 0x7f6376c93972 - std::io::Write::write_fmt::h8580846154bcb66a [INFO] [stderr] at /rustc/b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18/library/std/src/io/mod.rs:1519:15 [INFO] [stderr] 6: 0x7f6376ca5a65 - std::sys_common::backtrace::_print::h7ee55fed88d107a3 [INFO] [stderr] at /rustc/b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18/library/std/src/sys_common/backtrace.rs:49:5 [INFO] [stderr] 7: 0x7f6376ca5a65 - std::sys_common::backtrace::print::h54a7d3e52a524177 [INFO] [stderr] at /rustc/b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18/library/std/src/sys_common/backtrace.rs:36:9 [INFO] [stderr] 8: 0x7f6376ca5a65 - std::panicking::default_hook::{{closure}}::h60921e857bf55a40 [INFO] [stderr] at /rustc/b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18/library/std/src/panicking.rs:208:50 [INFO] [stderr] 9: 0x7f6376ca55ba - std::panicking::default_hook::hf0f9afb1017317fc [INFO] [stderr] at /rustc/b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18/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: 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] [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] [stdout] warning: 5 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] 10: 0x7f6377537428 - rustc_driver::report_ice::ha25ae86a5858acc3 [INFO] [stderr] 11: 0x7f6376ca6366 - std::panicking::rust_panic_with_hook::h8d66bf42b407aaea [INFO] [stderr] at /rustc/b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18/library/std/src/panicking.rs:595:17 [INFO] [stderr] 12: 0x7f6376ca5e57 - std::panicking::begin_panic_handler::{{closure}}::hde71edcd925d0c5e [INFO] [stderr] at /rustc/b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18/library/std/src/panicking.rs:495:13 [INFO] [stderr] 13: 0x7f6376ca22bc - std::sys_common::backtrace::__rust_end_short_backtrace::h8a3c7d6cea578919 [INFO] [stderr] at /rustc/b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18/library/std/src/sys_common/backtrace.rs:141:18 [INFO] [stderr] 14: 0x7f6376ca5de9 - rust_begin_unwind [INFO] [stderr] at /rustc/b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18/library/std/src/panicking.rs:493:5 [INFO] [stderr] 15: 0x7f6376d10fb1 - core::panicking::panic_fmt::h20225113c4a2f8fd [INFO] [stderr] at /rustc/b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18/library/core/src/panicking.rs:92:14 [INFO] [stderr] 16: 0x7f6376d10efd - core::panicking::panic::h35b77276aa4b0c12 [INFO] [stderr] at /rustc/b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18/library/core/src/panicking.rs:50:5 [INFO] [stderr] 17: 0x7f6378a928fb - rustc_mir::transform::check_consts::qualifs::in_operand::hcb716a78a097cdff [INFO] [stderr] 18: 0x7f6378907f39 - rustc_mir::transform::promote_consts::Validator::qualif_local::h92146139f0a6a7b4 [INFO] [stderr] 19: 0x7f6378908fab - rustc_mir::transform::promote_consts::Validator::validate_local::h973a4116bbbe4667 [INFO] [stderr] 20: 0x7f6378908f90 - rustc_mir::transform::promote_consts::Validator::validate_local::h973a4116bbbe4667 [INFO] [stderr] 21: 0x7f6378908c67 - rustc_mir::transform::promote_consts::Validator::validate_local::h973a4116bbbe4667 [INFO] [stderr] 22: 0x7f637890e275 - rustc_mir::transform::promote_consts::should_suggest_const_in_array_repeat_expressions_attribute::hd1855d2e9eed4330 [INFO] [stderr] 23: 0x7f6378962cbd - rustc_mir::borrow_check::type_check::TypeChecker::check_rvalue::h15c1cd8f500520f0 [INFO] [stderr] 24: 0x7f6378966830 - rustc_mir::borrow_check::type_check::TypeChecker::typeck_mir::h3fa30b3c7d19766c [INFO] [stderr] 25: 0x7f63789593e1 - rustc_mir::borrow_check::type_check::type_check::hf23dfdbc23915bfd [INFO] [stderr] 26: 0x7f6378cdd83f - rustc_mir::borrow_check::nll::compute_regions::h6724526dd9a6570d [INFO] [stderr] 27: 0x7f6378e1ce45 - rustc_mir::borrow_check::do_mir_borrowck::h3d752c9d0437bc32 [INFO] [stderr] 28: 0x7f63788bbfa6 - rustc_infer::infer::InferCtxtBuilder::enter::hf3ed00b836abf33a [INFO] [stderr] 29: 0x7f6378e1c059 - rustc_mir::borrow_check::mir_borrowck::h8fcfde9d3bc3965f [INFO] [stderr] 30: 0x7f6378dee845 - core::ops::function::FnOnce::call_once::hda8d7f4d3e0163df [INFO] [stderr] 31: 0x7f637778492e - rustc_middle::ty::query:: for rustc_middle::ty::query::queries::mir_borrowck>::compute::hd320f4ca41a47c0c [INFO] [stderr] 32: 0x7f63777438e0 - rustc_query_system::dep_graph::graph::DepGraph::with_task_impl::hbff93ce2cea26122 [INFO] [stderr] 33: 0x7f6377787bfb - rustc_data_structures::stack::ensure_sufficient_stack::he17b7629a75337fd [INFO] [stderr] 34: 0x7f63777205a4 - rustc_query_system::query::plumbing::get_query_impl::hc38aca5d51d5691a [INFO] [stderr] 35: 0x7f6377728719 - rustc_query_system::query::plumbing::ensure_query_impl::h474c3afdd9b59c6e [INFO] [stderr] 36: 0x7f6377761999 - rustc_session::utils::::time::hd10f52cc7be7a8fd [INFO] [stderr] 37: 0x7f6377795542 - rustc_interface::passes::analysis::h342855b4d8ce9897 [INFO] [stderr] 38: 0x7f63774f3f2b - rustc_middle::ty::query:: for rustc_middle::ty::query::queries::analysis>::compute::h95ff81a8a73eaff3 [INFO] [stderr] 39: 0x7f6377584c06 - rustc_query_system::dep_graph::graph::DepGraph::with_eval_always_task::h71fd6f4f43205659 [INFO] [stderr] 40: 0x7f6377593ee6 - rustc_data_structures::stack::ensure_sufficient_stack::h426420634e295fa0 [INFO] [stderr] 41: 0x7f6377521b44 - rustc_query_system::query::plumbing::get_query_impl::h59cb47161047ab66 [INFO] [stderr] 42: 0x7f63774f65fb - rustc_interface::passes::QueryContext::enter::heace2ac35bf577de [INFO] [stderr] 43: 0x7f6377591a65 - rustc_interface::queries::::enter::hcfd2504bb4e8d292 [INFO] [stderr] 44: 0x7f637755fd37 - rustc_span::with_source_map::hdf17fa3a4d8fe35b [INFO] [stderr] 45: 0x7f637758de8c - scoped_tls::ScopedKey::set::h5dca480b178bbfab [INFO] [stderr] 46: 0x7f6377594fa5 - std::sys_common::backtrace::__rust_begin_short_backtrace::ha4cbf96baa7e4912 [INFO] [stderr] 47: 0x7f63774fdb4a - core::ops::function::FnOnce::call_once{{vtable.shim}}::he2d69591c700ddc8 [INFO] [stderr] 48: 0x7f6376cb562a - as core::ops::function::FnOnce>::call_once::hea1090dbdcecbf5a [INFO] [stderr] at /rustc/b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18/library/alloc/src/boxed.rs:1327:9 [INFO] [stderr] 49: 0x7f6376cb562a - as core::ops::function::FnOnce>::call_once::h8d5723d3912bd325 [INFO] [stderr] at /rustc/b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18/library/alloc/src/boxed.rs:1327:9 [INFO] [stderr] 50: 0x7f6376cb562a - std::sys::unix::thread::Thread::new::thread_start::hc17a425ca2995724 [INFO] [stderr] at /rustc/b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18/library/std/src/sys/unix/thread.rs:71:17 [INFO] [stderr] 51: 0x7f6376bcd609 - start_thread [INFO] [stderr] 52: 0x7f6376ae1293 - clone [INFO] [stderr] 53: 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 (b7ebc6b0c 2020-11-30) 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" "532be6711203da025656d524e06aa89c527df0a0d7dd12b0fa121aef374d618c", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "532be6711203da025656d524e06aa89c527df0a0d7dd12b0fa121aef374d618c", kill_on_drop: false }` [INFO] [stdout] 532be6711203da025656d524e06aa89c527df0a0d7dd12b0fa121aef374d618c