[INFO] fetching crate free-list 0.2.0...
[INFO] extracting crate free-list 0.2.0 into work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/reg/free-list/0.2.0
[INFO] extracting crate free-list 0.2.0 into work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/reg/free-list/0.2.0
[INFO] validating manifest of free-list-0.2.0 on toolchain master#a850a426491e14186af2250549bf41256b5938d2
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+a850a426491e14186af2250549bf41256b5938d2-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of free-list-0.2.0 on toolchain try#06a150c7d11500b41499224f165e9de1de096768
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+06a150c7d11500b41499224f165e9de1de096768-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing free-list-0.2.0
[INFO] finished frobbing free-list-0.2.0
[INFO] frobbed toml for free-list-0.2.0 written to work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/reg/free-list/0.2.0/Cargo.toml
[INFO] started frobbing free-list-0.2.0
[INFO] finished frobbing free-list-0.2.0
[INFO] frobbed toml for free-list-0.2.0 written to work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/reg/free-list/0.2.0/Cargo.toml
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+a850a426491e14186af2250549bf41256b5938d2-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+06a150c7d11500b41499224f165e9de1de096768-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+a850a426491e14186af2250549bf41256b5938d2-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+06a150c7d11500b41499224f165e9de1de096768-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking free-list-0.2.0 against master#a850a426491e14186af2250549bf41256b5938d2 for pr-60162
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-60162/worker-4/master#a850a426491e14186af2250549bf41256b5938d2:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/reg/free-list/0.2.0:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/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" "+a850a426491e14186af2250549bf41256b5938d2-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 25012338d4a955d0b5e73ec6445d2c0892e6bdd7c4e580c901b2a6f501350d32
[INFO] running `"docker" "start" "-a" "25012338d4a955d0b5e73ec6445d2c0892e6bdd7c4e580c901b2a6f501350d32"`
[INFO] [stderr]     Checking free-list v0.2.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/list/mod.rs:35:13
[INFO] [stderr]    |
[INFO] [stderr] 35 |         let mut node_pool = Vec::with_capacity(initial_capacity);
[INFO] [stderr]    |             ----^^^^^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `empty`
[INFO] [stderr]   --> src/list/mod.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 |     pub fn empty(next: FreeListId) -> FreeListNode<T> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `a`
[INFO] [stderr]   --> src/list/tests.rs:38:10
[INFO] [stderr]    |
[INFO] [stderr] 38 |     let (a, b, c) = (list.allocate(0), list.allocate(0), list.allocate(0));
[INFO] [stderr]    |          ^ help: consider prefixing with an underscore: `_a`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `c`
[INFO] [stderr]   --> src/list/tests.rs:38:16
[INFO] [stderr]    |
[INFO] [stderr] 38 |     let (a, b, c) = (list.allocate(0), list.allocate(0), list.allocate(0));
[INFO] [stderr]    |                ^ help: consider prefixing with an underscore: `_c`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/list/mod.rs:35:13
[INFO] [stderr]    |
[INFO] [stderr] 35 |         let mut node_pool = Vec::with_capacity(initial_capacity);
[INFO] [stderr]    |             ----^^^^^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `empty`
[INFO] [stderr]   --> src/list/mod.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 |     pub fn empty(next: FreeListId) -> FreeListNode<T> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Rng`
[INFO] [stderr]  --> benches/locality.rs:9:12
[INFO] [stderr]   |
[INFO] [stderr] 9 | use rand::{Rng, XorShiftRng};
[INFO] [stderr]   |            ^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> benches/locality.rs:64:13
[INFO] [stderr]    |
[INFO] [stderr] 64 |         for i in 0..NON_CONTIGUOUS_BLOCK_SIZE {
[INFO] [stderr]    |             ^ help: consider prefixing with an underscore: `_i`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.99s
[INFO] running `"docker" "inspect" "25012338d4a955d0b5e73ec6445d2c0892e6bdd7c4e580c901b2a6f501350d32"`
[INFO] running `"docker" "rm" "-f" "25012338d4a955d0b5e73ec6445d2c0892e6bdd7c4e580c901b2a6f501350d32"`
[INFO] [stdout] 25012338d4a955d0b5e73ec6445d2c0892e6bdd7c4e580c901b2a6f501350d32