[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] checking perlindgren/array_list against beta-2020-07-24 for pr-75494-beta
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fperlindgren%2Farray_list" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/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-6/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-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 589b4e608c2b48525eb9e403ebbf699cc5b04bf1148241cedafc298951cd0235
[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" "589b4e608c2b48525eb9e403ebbf699cc5b04bf1148241cedafc298951cd0235", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "589b4e608c2b48525eb9e403ebbf699cc5b04bf1148241cedafc298951cd0235", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "589b4e608c2b48525eb9e403ebbf699cc5b04bf1148241cedafc298951cd0235", kill_on_drop: false }`
[INFO] [stdout] 589b4e608c2b48525eb9e403ebbf699cc5b04bf1148241cedafc298951cd0235
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ef1d7cb665ce7792bb260297dc48894f2187b62f6212909b9e927e7a533dba71
[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" "ef1d7cb665ce7792bb260297dc48894f2187b62f6212909b9e927e7a533dba71", 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()', 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: 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: 5 warnings emitted
[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:     0x7f12d21c18e5 - 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:     0x7f12d21c18e5 - 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:     0x7f12d21c18e5 - std::sys_common::backtrace::_print_fmt::h5e71b67af43fd70d
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:78
[INFO] [stderr]    3:     0x7f12d21c18e5 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hdb4a83d2b61107e5
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:59
[INFO] [stderr]    4:     0x7f12d21fe36c - core::fmt::write::ha20e7262fa3e8a7a
[INFO] [stderr]                                at src/libcore/fmt/mod.rs:1076
[INFO] [stderr]    5:     0x7f12d21b3662 - std::io::Write::write_fmt::h1aebfe8a5a79e36d
[INFO] [stderr]                                at src/libstd/io/mod.rs:1537
[INFO] [stderr]    6:     0x7f12d21c6780 - std::sys_common::backtrace::_print::h9c07314cc66ba539
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:62
[INFO] [stderr]    7:     0x7f12d21c6780 - std::sys_common::backtrace::print::hd1fd65f49a2d8544
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:49
[INFO] [stderr]    8:     0x7f12d21c6780 - std::panicking::default_hook::{{closure}}::h222da46485ab36fc
[INFO] [stderr]                                at src/libstd/panicking.rs:198
[INFO] [stderr]    9:     0x7f12d21c64cc - std::panicking::default_hook::hc5868949d129ed00
[INFO] [stderr]                                at src/libstd/panicking.rs:217
[INFO] [stderr]   10:     0x7f12d2930cd9 - rustc_driver::report_ice::he981df22d5d128c5
[INFO] [stderr]   11:     0x7f12d21c6ef8 - std::panicking::rust_panic_with_hook::h26a6ab8b0993c0c8
[INFO] [stderr]                                at src/libstd/panicking.rs:530
[INFO] [stderr]   12:     0x7f12d3e18bae - std::panicking::begin_panic::h7656aeaae42d94e4
[INFO] [stderr]   13:     0x7f12d3ba311e - rustc_mir::transform::check_consts::qualifs::in_operand::h439609e7c757bccb
[INFO] [stderr]   14:     0x7f12d3cf7ac9 - rustc_mir::transform::promote_consts::Validator::qualif_local::hf6876a8c69e656fd
[INFO] [stderr]   15:     0x7f12d3cf890c - rustc_mir::transform::promote_consts::Validator::validate_local::h1af41e1e02615a88
[INFO] [stderr]   16:     0x7f12d3cf88f1 - rustc_mir::transform::promote_consts::Validator::validate_local::h1af41e1e02615a88
[INFO] [stderr]   17:     0x7f12d3cf860d - rustc_mir::transform::promote_consts::Validator::validate_local::h1af41e1e02615a88
[INFO] [stderr]   18:     0x7f12d3cfd6e5 - rustc_mir::transform::promote_consts::should_suggest_const_in_array_repeat_expressions_attribute::hff37f05dcd471213
[INFO] [stderr]   19:     0x7f12d3b5326f - rustc_mir::borrow_check::type_check::TypeChecker::check_rvalue::hd16f338f37573881
[INFO] [stderr]   20:     0x7f12d3b5546e - rustc_mir::borrow_check::type_check::TypeChecker::typeck_mir::h3fb4cd3b5371d622
[INFO] [stderr]   21:     0x7f12d3b4790d - rustc_mir::borrow_check::type_check::type_check::h62fa8eb96fbdf395
[INFO] [stderr]   22:     0x7f12d3d6724a - rustc_mir::borrow_check::nll::compute_regions::hf65f670f1ed2f3be
[INFO] [stderr]   23:     0x7f12d3b5a211 - rustc_mir::borrow_check::do_mir_borrowck::h894a2758e370f4f1
[INFO] [stderr]   24:     0x7f12d3c91b6b - rustc_infer::infer::InferCtxtBuilder::enter::h61405c7b72c3cb3b
[INFO] [stderr]   25:     0x7f12d3b59671 - rustc_mir::borrow_check::mir_borrowck::h238eff348f2448c1
[INFO] [stderr]   26:     0x7f12d2b25812 - rustc_middle::ty::query::<impl rustc_query_system::query::config::QueryAccessors<rustc_middle::ty::context::TyCtxt> for rustc_middle::ty::query::queries::mir_borrowck>::compute::h16de47dde4bfba43
[INFO] [stderr]   27:     0x7f12d2b81a74 - rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl::hc576d597b3bd6924
[INFO] [stderr]   28:     0x7f12d2ad491c - rustc_data_structures::stack::ensure_sufficient_stack::hd9358b6bb6baa29a
[INFO] [stderr]   29:     0x7f12d2bd84f0 - rustc_query_system::query::plumbing::get_query_impl::hf86dc4920ee58f84
[INFO] [stderr]   30:     0x7f12d2bdd569 - rustc_query_system::query::plumbing::ensure_query_impl::h827a7137f266c40c
[INFO] [stderr]   31:     0x7f12d2b79ff9 - rustc_session::utils::<impl rustc_session::session::Session>::time::h5d840cc245397860
[INFO] [stderr]   32:     0x7f12d2acfe8b - rustc_interface::passes::analysis::ha1db7bcd18539f2d
[INFO] [stderr]   33:     0x7f12d2918cfb - rustc_middle::ty::query::<impl rustc_query_system::query::config::QueryAccessors<rustc_middle::ty::context::TyCtxt> for rustc_middle::ty::query::queries::analysis>::compute::hc042ca4974c324d3
[INFO] [stderr]   34:     0x7f12d298d747 - rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl::hda948752dd73d041
[INFO] [stderr]   35:     0x7f12d28f4070 - rustc_query_system::query::plumbing::get_query_impl::h9ed07dfcd4d7bd8e
[INFO] [stderr]   36:     0x7f12d291959f - rustc_middle::ty::context::tls::enter_global::he852bb9cdfa246ab
[INFO] [stderr]   37:     0x7f12d28eaffa - rustc_interface::queries::<impl rustc_interface::interface::Compiler>::enter::h9bf1a33ef2661623
[INFO] [stderr]   38:     0x7f12d298b4b7 - rustc_span::with_source_map::h8ce64b93fd9acc69
[INFO] [stderr]   39:     0x7f12d28ec216 - rustc_interface::interface::create_compiler_and_run::h91b77216978990f1
[INFO] [stderr]   40:     0x7f12d291684d - scoped_tls::ScopedKey<T>::set::h37e16efb70af8f21
[INFO] [stderr]   41:     0x7f12d293c752 - std::sys_common::backtrace::__rust_begin_short_backtrace::h2917f228238fa734
[INFO] [stderr]   42:     0x7f12d28fa0fe - core::ops::function::FnOnce::call_once{{vtable.shim}}::h782df3fd312ace52
[INFO] [stderr]   43:     0x7f12d21d5cba - <alloc::boxed::Box<F> as core::ops::function::FnOnce<A>>::call_once::h61c24496ae624ac5
[INFO] [stderr]                                at /rustc/6f959902b3103c49ca981fbc01871589c3498489/src/liballoc/boxed.rs:1081
[INFO] [stderr]   44:     0x7f12d21d5cba - <alloc::boxed::Box<F> as core::ops::function::FnOnce<A>>::call_once::h89548957afa14049
[INFO] [stderr]                                at /rustc/6f959902b3103c49ca981fbc01871589c3498489/src/liballoc/boxed.rs:1081
[INFO] [stderr]   45:     0x7f12d21d5cba - std::sys::unix::thread::Thread::new::thread_start::h73903fbbff5b990e
[INFO] [stderr]                                at src/libstd/sys/unix/thread.rs:87
[INFO] [stderr]   46:     0x7f12d2116609 - start_thread
[INFO] [stderr]   47:     0x7f12d202a103 - __clone
[INFO] [stderr]   48:                0x0 - <unknown>
[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" "ef1d7cb665ce7792bb260297dc48894f2187b62f6212909b9e927e7a533dba71", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ef1d7cb665ce7792bb260297dc48894f2187b62f6212909b9e927e7a533dba71", kill_on_drop: false }`
[INFO] [stdout] ef1d7cb665ce7792bb260297dc48894f2187b62f6212909b9e927e7a533dba71
