[INFO] crate thincollections 0.5.3 is already in cache
[INFO] extracting crate thincollections 0.5.3 into work/ex/pr-57745/sources/master#f613dc138b4012cf3d2eb40718fbcc7cf0a34039/reg/thincollections/0.5.3
[INFO] extracting crate thincollections 0.5.3 into work/ex/pr-57745/sources/try#29640c57b5f92febba0e40c50cb863c9a7ede51d/reg/thincollections/0.5.3
[INFO] validating manifest of thincollections-0.5.3 on toolchain master#f613dc138b4012cf3d2eb40718fbcc7cf0a34039
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+f613dc138b4012cf3d2eb40718fbcc7cf0a34039-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of thincollections-0.5.3 on toolchain try#29640c57b5f92febba0e40c50cb863c9a7ede51d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+29640c57b5f92febba0e40c50cb863c9a7ede51d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing thincollections-0.5.3
[INFO] finished frobbing thincollections-0.5.3
[INFO] frobbed toml for thincollections-0.5.3 written to work/ex/pr-57745/sources/master#f613dc138b4012cf3d2eb40718fbcc7cf0a34039/reg/thincollections/0.5.3/Cargo.toml
[INFO] started frobbing thincollections-0.5.3
[INFO] finished frobbing thincollections-0.5.3
[INFO] frobbed toml for thincollections-0.5.3 written to work/ex/pr-57745/sources/try#29640c57b5f92febba0e40c50cb863c9a7ede51d/reg/thincollections/0.5.3/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+f613dc138b4012cf3d2eb40718fbcc7cf0a34039-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+29640c57b5f92febba0e40c50cb863c9a7ede51d-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+f613dc138b4012cf3d2eb40718fbcc7cf0a34039-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+29640c57b5f92febba0e40c50cb863c9a7ede51d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking thincollections-0.5.3 against try#29640c57b5f92febba0e40c50cb863c9a7ede51d for pr-57745
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57745/worker-0/try#29640c57b5f92febba0e40c50cb863c9a7ede51d:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57745/sources/try#29640c57b5f92febba0e40c50cb863c9a7ede51d/reg/thincollections/0.5.3:/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" "+29640c57b5f92febba0e40c50cb863c9a7ede51d-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] f2bcaf7a58616224963d5d15283cdc15575cc0d539fe6a8daa0060b556996a47
[INFO] running `"docker" "start" "-a" "f2bcaf7a58616224963d5d15283cdc15575cc0d539fe6a8daa0060b556996a47"`
[INFO] [stderr]     Checking thincollections v0.5.3 (/opt/crater/workdir)
[INFO] [stderr]     Checking xoshiro v0.0.4
[INFO] [stderr]     Checking num-bigint v0.2.2
[INFO] [stderr]     Checking num-rational v0.2.1
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]     --> src/thin_vec.rs:1244:29
[INFO] [stderr]      |
[INFO] [stderr] 1244 |     pub fn into_boxed_slice(mut self) -> Box<[T]> {
[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]     Checking num v0.2.0
[INFO] [stderr] warning: unused import: `super::ThinSentinel`
[INFO] [stderr]     --> src/thin_map.rs:2135:9
[INFO] [stderr]      |
[INFO] [stderr] 2135 |     use super::ThinSentinel;
[INFO] [stderr]      |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]     --> src/thin_vec.rs:1244:29
[INFO] [stderr]      |
[INFO] [stderr] 1244 |     pub fn into_boxed_slice(mut self) -> Box<[T]> {
[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]     Finished dev [unoptimized + debuginfo] target(s) in 7.60s
[INFO] running `"docker" "inspect" "f2bcaf7a58616224963d5d15283cdc15575cc0d539fe6a8daa0060b556996a47"`
[INFO] running `"docker" "rm" "-f" "f2bcaf7a58616224963d5d15283cdc15575cc0d539fe6a8daa0060b556996a47"`
[INFO] [stdout] f2bcaf7a58616224963d5d15283cdc15575cc0d539fe6a8daa0060b556996a47