[INFO] updating cached repository fuszenecker/TaskStats
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/fuszenecker/TaskStats
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/fuszenecker/TaskStats" "work/ex/beta-1.38-1/sources/1.37.0/gh/fuszenecker/TaskStats"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/fuszenecker/TaskStats'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/fuszenecker/TaskStats" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/fuszenecker/TaskStats"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/fuszenecker/TaskStats'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a8754d3be473dd91b44772fb7dbec73dc7c69a77
[INFO] sha for GitHub repo fuszenecker/TaskStats: a8754d3be473dd91b44772fb7dbec73dc7c69a77
[INFO] validating manifest of fuszenecker/TaskStats 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 fuszenecker/TaskStats 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 fuszenecker/TaskStats
[INFO] finished frobbing fuszenecker/TaskStats
[INFO] frobbed toml for fuszenecker/TaskStats written to work/ex/beta-1.38-1/sources/1.37.0/gh/fuszenecker/TaskStats/Cargo.toml
[INFO] started frobbing fuszenecker/TaskStats
[INFO] finished frobbing fuszenecker/TaskStats
[INFO] frobbed toml for fuszenecker/TaskStats written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/fuszenecker/TaskStats/Cargo.toml
[INFO] crate fuszenecker/TaskStats 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] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing fuszenecker/TaskStats against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/fuszenecker/TaskStats:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] f3d09cd975ca164ce75fa1d9f162a5d7b3a72fd7f22c0257239d40c603ff1c5c
[INFO] running `"docker" "start" "-a" "f3d09cd975ca164ce75fa1d9f162a5d7b3a72fd7f22c0257239d40c603ff1c5c"`
[INFO] [stderr]    Compiling cc v1.0.7
[INFO] [stderr]    Compiling regex v0.2.9
[INFO] [stderr]    Compiling serde v1.0.33
[INFO] [stderr]    Compiling termios v0.2.2
[INFO] [stderr]    Compiling clicolors-control v0.2.0
[INFO] [stderr]    Compiling tokio-executor v0.1.0
[INFO] [stderr]    Compiling itertools v0.7.7
[INFO] [stderr]    Compiling parking_lot_core v0.2.13
[INFO] [stderr]    Compiling mio v0.6.14
[INFO] [stderr]    Compiling crossbeam-epoch v0.4.0
[INFO] [stderr]    Compiling tokio-io v0.1.6
[INFO] [stderr]    Compiling syn v0.12.14
[INFO] [stderr]    Compiling num v0.1.42
[INFO] [stderr]    Compiling parking_lot v0.5.4
[INFO] [stderr]    Compiling crossbeam-deque v0.3.0
[INFO] [stderr]    Compiling tokio-threadpool v0.1.0
[INFO] [stderr]    Compiling tokio-reactor v0.1.0
[INFO] [stderr]    Compiling openssl-sys v0.9.27
[INFO] [stderr]    Compiling openssl v0.9.24
[INFO] [stderr]    Compiling serde_derive_internals v0.21.0
[INFO] [stderr]    Compiling tokio v0.1.3
[INFO] [stderr]    Compiling tokio-core v0.1.15
[INFO] [stderr]    Compiling serde_derive v1.0.33
[INFO] [stderr]    Compiling env_logger v0.5.5
[INFO] [stderr]    Compiling console v0.6.1
[INFO] [stderr]    Compiling tokio-proto v0.1.1
[INFO] [stderr]    Compiling native-tls v0.1.5
[INFO] [stderr]    Compiling tokio-tls v0.1.4
[INFO] [stderr]    Compiling serde_json v1.0.11
[INFO] [stderr]    Compiling chrono v0.4.0
[INFO] [stderr]    Compiling hyper v0.11.22
[INFO] [stderr]    Compiling hyper-tls v0.1.2
[INFO] [stderr]    Compiling restson v0.1.3
[INFO] [stderr]    Compiling taskstats v1.1.1 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/statistics.rs:53:13
[INFO] [stderr]    |
[INFO] [stderr] 53 |         let mut monthly_vec = monthly.get_mut(&group).unwrap();
[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 1m 21s
[INFO] running `"docker" "inspect" "f3d09cd975ca164ce75fa1d9f162a5d7b3a72fd7f22c0257239d40c603ff1c5c"`
[INFO] running `"docker" "rm" "-f" "f3d09cd975ca164ce75fa1d9f162a5d7b3a72fd7f22c0257239d40c603ff1c5c"`
[INFO] [stdout] f3d09cd975ca164ce75fa1d9f162a5d7b3a72fd7f22c0257239d40c603ff1c5c
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/fuszenecker/TaskStats:/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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] fefcf0133076ca0d27956df99a58e2bdb3540522765c06d6ae7b5d3d2e9a3517
[INFO] running `"docker" "start" "-a" "fefcf0133076ca0d27956df99a58e2bdb3540522765c06d6ae7b5d3d2e9a3517"`
[INFO] [stderr]    Compiling taskstats v1.1.1 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/statistics.rs:53:13
[INFO] [stderr]    |
[INFO] [stderr] 53 |         let mut monthly_vec = monthly.get_mut(&group).unwrap();
[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 1.73s
[INFO] running `"docker" "inspect" "fefcf0133076ca0d27956df99a58e2bdb3540522765c06d6ae7b5d3d2e9a3517"`
[INFO] running `"docker" "rm" "-f" "fefcf0133076ca0d27956df99a58e2bdb3540522765c06d6ae7b5d3d2e9a3517"`
[INFO] [stdout] fefcf0133076ca0d27956df99a58e2bdb3540522765c06d6ae7b5d3d2e9a3517
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/fuszenecker/TaskStats:/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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] 5a3a8d157817d93c2bdbd24ed6d74e9797afa774ae9d491d517da676e85e162f
[INFO] running `"docker" "start" "-a" "5a3a8d157817d93c2bdbd24ed6d74e9797afa774ae9d491d517da676e85e162f"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/taskstats-a1342c5203e0f102
[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" "5a3a8d157817d93c2bdbd24ed6d74e9797afa774ae9d491d517da676e85e162f"`
[INFO] running `"docker" "rm" "-f" "5a3a8d157817d93c2bdbd24ed6d74e9797afa774ae9d491d517da676e85e162f"`
[INFO] [stdout] 5a3a8d157817d93c2bdbd24ed6d74e9797afa774ae9d491d517da676e85e162f