[INFO] updating cached repository LegitBaboulinet/rust-cheatsheet
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/LegitBaboulinet/rust-cheatsheet
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/LegitBaboulinet/rust-cheatsheet" "work/ex/beta-1.38-1/sources/1.37.0/gh/LegitBaboulinet/rust-cheatsheet"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/LegitBaboulinet/rust-cheatsheet'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/LegitBaboulinet/rust-cheatsheet" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/LegitBaboulinet/rust-cheatsheet"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/LegitBaboulinet/rust-cheatsheet'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 86a181851a96f4c915c28b0d44b5125e7873e3f4
[INFO] sha for GitHub repo LegitBaboulinet/rust-cheatsheet: 86a181851a96f4c915c28b0d44b5125e7873e3f4
[INFO] validating manifest of LegitBaboulinet/rust-cheatsheet on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of LegitBaboulinet/rust-cheatsheet on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing LegitBaboulinet/rust-cheatsheet
[INFO] finished frobbing LegitBaboulinet/rust-cheatsheet
[INFO] frobbed toml for LegitBaboulinet/rust-cheatsheet written to work/ex/beta-1.38-1/sources/1.37.0/gh/LegitBaboulinet/rust-cheatsheet/Cargo.toml
[INFO] started frobbing LegitBaboulinet/rust-cheatsheet
[INFO] finished frobbing LegitBaboulinet/rust-cheatsheet
[INFO] frobbed toml for LegitBaboulinet/rust-cheatsheet written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/LegitBaboulinet/rust-cheatsheet/Cargo.toml
[INFO] crate LegitBaboulinet/rust-cheatsheet already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/LegitBaboulinet/rust-cheatsheet/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing LegitBaboulinet/rust-cheatsheet against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/LegitBaboulinet/rust-cheatsheet:/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=warn" "-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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 6ab4c4431421478ca54f9bcf0dfdad731d6698cfb609a6f0497ee939952482c7
[INFO] running `"docker" "start" "-a" "6ab4c4431421478ca54f9bcf0dfdad731d6698cfb609a6f0497ee939952482c7"`
[INFO] [stderr]    Compiling rust-cheatsheet v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/structs.rs:48:9
[INFO] [stderr]    |
[INFO] [stderr] 48 |     let mut p = Person::new("John", "Doe");
[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 0.73s
[INFO] running `"docker" "inspect" "6ab4c4431421478ca54f9bcf0dfdad731d6698cfb609a6f0497ee939952482c7"`
[INFO] running `"docker" "rm" "-f" "6ab4c4431421478ca54f9bcf0dfdad731d6698cfb609a6f0497ee939952482c7"`
[INFO] [stdout] 6ab4c4431421478ca54f9bcf0dfdad731d6698cfb609a6f0497ee939952482c7
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/LegitBaboulinet/rust-cheatsheet:/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=warn" "-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" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] b2030b301d2f648be518a047f328142f020bce9a585dd800503f7d8e9f30846e
[INFO] running `"docker" "start" "-a" "b2030b301d2f648be518a047f328142f020bce9a585dd800503f7d8e9f30846e"`
[INFO] [stderr]    Compiling rust-cheatsheet v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/structs.rs:48:9
[INFO] [stderr]    |
[INFO] [stderr] 48 |     let mut p = Person::new("John", "Doe");
[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 0.84s
[INFO] running `"docker" "inspect" "b2030b301d2f648be518a047f328142f020bce9a585dd800503f7d8e9f30846e"`
[INFO] running `"docker" "rm" "-f" "b2030b301d2f648be518a047f328142f020bce9a585dd800503f7d8e9f30846e"`
[INFO] [stdout] b2030b301d2f648be518a047f328142f020bce9a585dd800503f7d8e9f30846e
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/LegitBaboulinet/rust-cheatsheet:/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=warn" "-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" "+beta-2019-08-13" "test" "--frozen"`
[INFO] [stdout] 5ab51308554dfbf271df3654a18c9c01972e57ba5950c3e42dac7a0b6566a8d8
[INFO] running `"docker" "start" "-a" "5ab51308554dfbf271df3654a18c9c01972e57ba5950c3e42dac7a0b6566a8d8"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.84s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rust_cheatsheet-2a03cebfa065fe6d
[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" "5ab51308554dfbf271df3654a18c9c01972e57ba5950c3e42dac7a0b6566a8d8"`
[INFO] running `"docker" "rm" "-f" "5ab51308554dfbf271df3654a18c9c01972e57ba5950c3e42dac7a0b6566a8d8"`
[INFO] [stdout] 5ab51308554dfbf271df3654a18c9c01972e57ba5950c3e42dac7a0b6566a8d8