[INFO] updating cached repository sgbasaraner/minart
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/sgbasaraner/minart
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/sgbasaraner/minart" "work/ex/beta-1.37-6/sources/1.36.0/gh/sgbasaraner/minart"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/sgbasaraner/minart'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/sgbasaraner/minart" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/sgbasaraner/minart"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/sgbasaraner/minart'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 97eead494eb838c58d86c2739f05e300e1ce9762
[INFO] sha for GitHub repo sgbasaraner/minart: 97eead494eb838c58d86c2739f05e300e1ce9762
[INFO] validating manifest of sgbasaraner/minart on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of sgbasaraner/minart on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing sgbasaraner/minart
[INFO] finished frobbing sgbasaraner/minart
[INFO] frobbed toml for sgbasaraner/minart written to work/ex/beta-1.37-6/sources/1.36.0/gh/sgbasaraner/minart/Cargo.toml
[INFO] started frobbing sgbasaraner/minart
[INFO] finished frobbing sgbasaraner/minart
[INFO] frobbed toml for sgbasaraner/minart written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/sgbasaraner/minart/Cargo.toml
[INFO] crate sgbasaraner/minart already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing sgbasaraner/minart against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/sgbasaraner/minart:/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-2019-07-23" "build" "--frozen"`
[INFO] [stdout] f31665fedd0e8d1f2ea51f110df15f1833cf5add2832e9542293664f95e42d14
[INFO] running `"docker" "start" "-a" "f31665fedd0e8d1f2ea51f110df15f1833cf5add2832e9542293664f95e42d14"`
[INFO] [stderr]    Compiling crossbeam-epoch v0.3.1
[INFO] [stderr]    Compiling num-integer v0.1.39
[INFO] [stderr]    Compiling syn v0.14.4
[INFO] [stderr]    Compiling num-iter v0.1.37
[INFO] [stderr]    Compiling num-rational v0.1.42
[INFO] [stderr]    Compiling crossbeam-deque v0.2.0
[INFO] [stderr]    Compiling rayon-core v1.4.0
[INFO] [stderr]    Compiling png v0.12.0
[INFO] [stderr]    Compiling rayon v1.0.1
[INFO] [stderr]    Compiling num-derive v0.2.2
[INFO] [stderr]    Compiling jpeg-decoder v0.1.15
[INFO] [stderr]    Compiling image v0.19.0
[INFO] [stderr]    Compiling minart v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:67:13
[INFO] [stderr]    |
[INFO] [stderr] 67 |         let mut output = match File::create(formatted_file_name) {
[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 42.95s
[INFO] running `"docker" "inspect" "f31665fedd0e8d1f2ea51f110df15f1833cf5add2832e9542293664f95e42d14"`
[INFO] running `"docker" "rm" "-f" "f31665fedd0e8d1f2ea51f110df15f1833cf5add2832e9542293664f95e42d14"`
[INFO] [stdout] f31665fedd0e8d1f2ea51f110df15f1833cf5add2832e9542293664f95e42d14
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/sgbasaraner/minart:/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-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] ce4cb8023ace858945a56c4dcd7dfe21bee925866d0ddddba90d5e826398f2e3
[INFO] running `"docker" "start" "-a" "ce4cb8023ace858945a56c4dcd7dfe21bee925866d0ddddba90d5e826398f2e3"`
[INFO] [stderr]    Compiling minart v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:67:13
[INFO] [stderr]    |
[INFO] [stderr] 67 |         let mut output = match File::create(formatted_file_name) {
[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 1.30s
[INFO] running `"docker" "inspect" "ce4cb8023ace858945a56c4dcd7dfe21bee925866d0ddddba90d5e826398f2e3"`
[INFO] running `"docker" "rm" "-f" "ce4cb8023ace858945a56c4dcd7dfe21bee925866d0ddddba90d5e826398f2e3"`
[INFO] [stdout] ce4cb8023ace858945a56c4dcd7dfe21bee925866d0ddddba90d5e826398f2e3
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/sgbasaraner/minart:/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-2019-07-23" "test" "--frozen"`
[INFO] [stdout] 81c103ca5e4361b9249a9939fec04dcec3fe276856f6696d8b9d833f6b4e9734
[INFO] running `"docker" "start" "-a" "81c103ca5e4361b9249a9939fec04dcec3fe276856f6696d8b9d833f6b4e9734"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.10s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/minart-3e5aad5254527870
[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" "81c103ca5e4361b9249a9939fec04dcec3fe276856f6696d8b9d833f6b4e9734"`
[INFO] running `"docker" "rm" "-f" "81c103ca5e4361b9249a9939fec04dcec3fe276856f6696d8b9d833f6b4e9734"`
[INFO] [stdout] 81c103ca5e4361b9249a9939fec04dcec3fe276856f6696d8b9d833f6b4e9734