[INFO] updating cached repository seb-odessa/btree
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/seb-odessa/btree
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/seb-odessa/btree" "work/ex/pr-61100/sources/master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504/gh/seb-odessa/btree"`
[INFO] [stderr] Cloning into 'work/ex/pr-61100/sources/master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504/gh/seb-odessa/btree'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/seb-odessa/btree" "work/ex/pr-61100/sources/try#58b21121d0b447ceb3f1a655155d802191acf044/gh/seb-odessa/btree"`
[INFO] [stderr] Cloning into 'work/ex/pr-61100/sources/try#58b21121d0b447ceb3f1a655155d802191acf044/gh/seb-odessa/btree'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 144e85bd365c883245ced393f61305181fd9adf1
[INFO] sha for GitHub repo seb-odessa/btree: 144e85bd365c883245ced393f61305181fd9adf1
[INFO] validating manifest of seb-odessa/btree on toolchain master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+8869ee03d7f258e1b76a11c6fbb01b5708a9f504-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of seb-odessa/btree on toolchain try#58b21121d0b447ceb3f1a655155d802191acf044
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+58b21121d0b447ceb3f1a655155d802191acf044-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing seb-odessa/btree
[INFO] finished frobbing seb-odessa/btree
[INFO] frobbed toml for seb-odessa/btree written to work/ex/pr-61100/sources/master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504/gh/seb-odessa/btree/Cargo.toml
[INFO] started frobbing seb-odessa/btree
[INFO] finished frobbing seb-odessa/btree
[INFO] frobbed toml for seb-odessa/btree written to work/ex/pr-61100/sources/try#58b21121d0b447ceb3f1a655155d802191acf044/gh/seb-odessa/btree/Cargo.toml
[INFO] crate seb-odessa/btree already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+8869ee03d7f258e1b76a11c6fbb01b5708a9f504-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+58b21121d0b447ceb3f1a655155d802191acf044-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] checking seb-odessa/btree against master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504 for pr-61100
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-61100/worker-7/master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-61100/sources/master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504/gh/seb-odessa/btree:/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" "+8869ee03d7f258e1b76a11c6fbb01b5708a9f504-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] a7e3b9e0a441ea46f9f95711207edebc62b1d170852f386032561b2d34075d2c
[INFO] running `"docker" "start" "-a" "a7e3b9e0a441ea46f9f95711207edebc62b1d170852f386032561b2d34075d2c"`
[INFO] [stderr]     Checking BTree v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `Formatter`
[INFO] [stderr]  --> src/main.rs:1:25
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::fmt::{Display, Formatter};
[INFO] [stderr]   |                         ^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Formatter`
[INFO] [stderr]  --> src/main.rs:1:25
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::fmt::{Display, Formatter};
[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/main.rs:149:14
[INFO] [stderr]     |
[INFO] [stderr] 149 |         Some(mut node) => node.update("Z".to_string()),
[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: crate `BTree` should have a snake case name
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(non_snake_case)] on by default
[INFO] [stderr]   = help: convert the identifier to snake case: `btree`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:149:14
[INFO] [stderr]     |
[INFO] [stderr] 149 |         Some(mut node) => node.update("Z".to_string()),
[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: crate `BTree` should have a snake case name
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(non_snake_case)] on by default
[INFO] [stderr]   = help: convert the identifier to snake case: `btree`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.45s
[INFO] running `"docker" "inspect" "a7e3b9e0a441ea46f9f95711207edebc62b1d170852f386032561b2d34075d2c"`
[INFO] running `"docker" "rm" "-f" "a7e3b9e0a441ea46f9f95711207edebc62b1d170852f386032561b2d34075d2c"`
[INFO] [stdout] a7e3b9e0a441ea46f9f95711207edebc62b1d170852f386032561b2d34075d2c