[INFO] updating cached repository steffenhaug/freelist
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/steffenhaug/freelist
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/steffenhaug/freelist" "work/ex/pr-60039-1/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/gh/steffenhaug/freelist"`
[INFO] [stderr] Cloning into 'work/ex/pr-60039-1/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/gh/steffenhaug/freelist'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/steffenhaug/freelist" "work/ex/pr-60039-1/sources/try#99a7498759a22b5684caf798a98b7e90ad9d2443/gh/steffenhaug/freelist"`
[INFO] [stderr] Cloning into 'work/ex/pr-60039-1/sources/try#99a7498759a22b5684caf798a98b7e90ad9d2443/gh/steffenhaug/freelist'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ee8b8506532e043996fb4c8fdd7f15e72f942fef
[INFO] sha for GitHub repo steffenhaug/freelist: ee8b8506532e043996fb4c8fdd7f15e72f942fef
[INFO] validating manifest of steffenhaug/freelist on toolchain master#e305df1846a6d985315917ae0c81b74af8b4e641
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e305df1846a6d985315917ae0c81b74af8b4e641-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of steffenhaug/freelist on toolchain try#99a7498759a22b5684caf798a98b7e90ad9d2443
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+99a7498759a22b5684caf798a98b7e90ad9d2443-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing steffenhaug/freelist
[INFO] finished frobbing steffenhaug/freelist
[INFO] frobbed toml for steffenhaug/freelist written to work/ex/pr-60039-1/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/gh/steffenhaug/freelist/Cargo.toml
[INFO] started frobbing steffenhaug/freelist
[INFO] finished frobbing steffenhaug/freelist
[INFO] frobbed toml for steffenhaug/freelist written to work/ex/pr-60039-1/sources/try#99a7498759a22b5684caf798a98b7e90ad9d2443/gh/steffenhaug/freelist/Cargo.toml
[INFO] crate steffenhaug/freelist already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e305df1846a6d985315917ae0c81b74af8b4e641-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+99a7498759a22b5684caf798a98b7e90ad9d2443-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking steffenhaug/freelist against try#99a7498759a22b5684caf798a98b7e90ad9d2443 for pr-60039-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-60039-1/worker-4/try#99a7498759a22b5684caf798a98b7e90ad9d2443:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-60039-1/sources/try#99a7498759a22b5684caf798a98b7e90ad9d2443/gh/steffenhaug/freelist:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+99a7498759a22b5684caf798a98b7e90ad9d2443-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 29fa7ebd79f0005de3be26cc1f88316a556e1fd8ccb584711232fed5fb560c41
[INFO] running `"docker" "start" "-a" "29fa7ebd79f0005de3be26cc1f88316a556e1fd8ccb584711232fed5fb560c41"`
[INFO] [stderr]     Checking allocators v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Checking serde_json v1.0.33
[INFO] [stderr]     Checking itertools-num v0.1.3
[INFO] [stderr]     Checking criterion-stats v0.3.0
[INFO] [stderr]     Checking regex v1.1.0
[INFO] [stderr]    Compiling serde_derive v1.0.83
[INFO] [stderr]    Compiling failure_derive v0.1.4
[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]     Checking failure v0.1.4
[INFO] [stderr]     Checking criterion-plot v0.2.7
[INFO] [stderr]     Checking handlebars v1.0.5
[INFO] [stderr]     Checking criterion v0.2.7
[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] warning: unused `#[macro_use]` import
[INFO] [stderr]  --> benches/alloc_bench.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #[macro_use]
[INFO] [stderr]   | ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 27.59s
[INFO] running `"docker" "inspect" "29fa7ebd79f0005de3be26cc1f88316a556e1fd8ccb584711232fed5fb560c41"`
[INFO] running `"docker" "rm" "-f" "29fa7ebd79f0005de3be26cc1f88316a556e1fd8ccb584711232fed5fb560c41"`
[INFO] [stdout] 29fa7ebd79f0005de3be26cc1f88316a556e1fd8ccb584711232fed5fb560c41