[INFO] updating cached repository https://github.com/steffenhaug/freelist
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ee8b8506532e043996fb4c8fdd7f15e72f942fef
[INFO] testing steffenhaug/freelist against 1.38.0 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsteffenhaug%2Ffreelist" "work/builds/worker-4/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/steffenhaug/freelist on toolchain 1.38.0
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/steffenhaug/freelist
[INFO] finished tweaking git repo https://github.com/steffenhaug/freelist
[INFO] tweaked toml for git repo https://github.com/steffenhaug/freelist written to work/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/steffenhaug/freelist already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "/opt/rustwide/cargo-home/bin/cargo" "+1.38.0" "build" "--frozen"`
[INFO] [stdout] bd73ea2bd8918a686a4ffee88a370376bb87e67de2223599dff843afc3cf37a3
[INFO] running `"docker" "start" "-a" "bd73ea2bd8918a686a4ffee88a370376bb87e67de2223599dff843afc3cf37a3"`
[INFO] [stderr]    Compiling allocators v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused imports: `RefMut`, `Ref`
[INFO] [stderr]  --> src/pile.rs:2:26
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::cell::{RefCell, Ref, RefMut};
[INFO] [stderr]   |                          ^^^  ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fmt`
[INFO] [stderr]  --> src/pile.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::fmt;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `data`
[INFO] [stderr]   --> src/slotmap.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     data:       Vec<Entry<T>>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `slots`
[INFO] [stderr]   --> src/slotmap.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     slots:      Vec<Slot>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `free_data`
[INFO] [stderr]   --> src/slotmap.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     free_data:  Option<usize>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `free_slots`
[INFO] [stderr]   --> src/slotmap.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     free_slots: Option<usize>
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `t`
[INFO] [stderr]   --> src/main.rs:11:9
[INFO] [stderr]    |
[INFO] [stderr] 11 |     let t = fl.remove(x);
[INFO] [stderr]    |         ^ help: consider prefixing with an underscore: `_t`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `u`
[INFO] [stderr]   --> src/main.rs:17:9
[INFO] [stderr]    |
[INFO] [stderr] 17 |     let u = fl.insert(42);
[INFO] [stderr]    |         ^ help: consider prefixing with an underscore: `_u`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `v`
[INFO] [stderr]   --> src/main.rs:18:9
[INFO] [stderr]    |
[INFO] [stderr] 18 |     let v = fl.insert(69);
[INFO] [stderr]    |         ^ help: consider prefixing with an underscore: `_v`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.86s
[INFO] running `"docker" "inspect" "bd73ea2bd8918a686a4ffee88a370376bb87e67de2223599dff843afc3cf37a3"`
[INFO] running `"docker" "rm" "-f" "bd73ea2bd8918a686a4ffee88a370376bb87e67de2223599dff843afc3cf37a3"`
[INFO] [stdout] bd73ea2bd8918a686a4ffee88a370376bb87e67de2223599dff843afc3cf37a3
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "/opt/rustwide/cargo-home/bin/cargo" "+1.38.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] a56921d8e50f190c285ff755a968fd5562ad374723b13a8370f6256515edf062
[INFO] running `"docker" "start" "-a" "a56921d8e50f190c285ff755a968fd5562ad374723b13a8370f6256515edf062"`
[INFO] [stderr]    Compiling failure_derive v0.1.4
[INFO] [stderr]    Compiling serde v1.0.83
[INFO] [stderr]    Compiling pest v1.0.6
[INFO] [stderr]    Compiling itertools v0.7.11
[INFO] [stderr]    Compiling syn v0.15.23
[INFO] [stderr]    Compiling itertools-num v0.1.3
[INFO] [stderr]    Compiling csv-core v0.1.5
[INFO] [stderr]    Compiling criterion-stats v0.3.0
[INFO] [stderr]    Compiling regex v1.1.0
[INFO] [stderr]    Compiling pest_derive v1.0.8
[INFO] [stderr]    Compiling synstructure v0.10.1
[INFO] [stderr]    Compiling serde_derive v1.0.83
[INFO] [stderr]    Compiling failure v0.1.4
[INFO] [stderr]    Compiling criterion-plot v0.2.7
[INFO] [stderr]    Compiling serde_json v1.0.33
[INFO] [stderr]    Compiling csv v1.0.5
[INFO] [stderr]    Compiling handlebars v1.0.5
[INFO] [stderr]    Compiling criterion v0.2.7
[INFO] [stderr]    Compiling allocators v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused imports: `RefMut`, `Ref`
[INFO] [stderr]  --> src/pile.rs:2:26
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::cell::{RefCell, Ref, RefMut};
[INFO] [stderr]   |                          ^^^  ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fmt`
[INFO] [stderr]  --> src/pile.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::fmt;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `t`
[INFO] [stderr]   --> src/main.rs:11:9
[INFO] [stderr]    |
[INFO] [stderr] 11 |     let t = fl.remove(x);
[INFO] [stderr]    |         ^ help: consider prefixing with an underscore: `_t`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `u`
[INFO] [stderr]   --> src/main.rs:17:9
[INFO] [stderr]    |
[INFO] [stderr] 17 |     let u = fl.insert(42);
[INFO] [stderr]    |         ^ help: consider prefixing with an underscore: `_u`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `v`
[INFO] [stderr]   --> src/main.rs:18:9
[INFO] [stderr]    |
[INFO] [stderr] 18 |     let v = fl.insert(69);
[INFO] [stderr]    |         ^ help: consider prefixing with an underscore: `_v`
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `data`
[INFO] [stderr]   --> src/slotmap.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     data:       Vec<Entry<T>>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `slots`
[INFO] [stderr]   --> src/slotmap.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     slots:      Vec<Slot>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `free_data`
[INFO] [stderr]   --> src/slotmap.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     free_data:  Option<usize>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `free_slots`
[INFO] [stderr]   --> src/slotmap.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     free_slots: Option<usize>
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 20.85s
[INFO] running `"docker" "inspect" "a56921d8e50f190c285ff755a968fd5562ad374723b13a8370f6256515edf062"`
[INFO] running `"docker" "rm" "-f" "a56921d8e50f190c285ff755a968fd5562ad374723b13a8370f6256515edf062"`
[INFO] [stdout] a56921d8e50f190c285ff755a968fd5562ad374723b13a8370f6256515edf062
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "/opt/rustwide/cargo-home/bin/cargo" "+1.38.0" "test" "--frozen"`
[INFO] [stdout] 2bcbc001b3004342190c3e35a21e73a5e8cdd230a43740994746cb4bb1120ee3
[INFO] running `"docker" "start" "-a" "2bcbc001b3004342190c3e35a21e73a5e8cdd230a43740994746cb4bb1120ee3"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.29s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/allocators-4ca15e51777796ec
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/executable-31163cdd54b3006c
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests allocators
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "2bcbc001b3004342190c3e35a21e73a5e8cdd230a43740994746cb4bb1120ee3"`
[INFO] running `"docker" "rm" "-f" "2bcbc001b3004342190c3e35a21e73a5e8cdd230a43740994746cb4bb1120ee3"`
[INFO] [stdout] 2bcbc001b3004342190c3e35a21e73a5e8cdd230a43740994746cb4bb1120ee3