[INFO] updating cached repository miyamofigo/lzw
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/miyamofigo/lzw
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/miyamofigo/lzw" "work/ex/beta-1.37-6/sources/1.36.0/gh/miyamofigo/lzw"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/miyamofigo/lzw'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/miyamofigo/lzw" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/miyamofigo/lzw"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/miyamofigo/lzw'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 642a2cff98782747c679ee100d7b4b4146ebe2f3
[INFO] sha for GitHub repo miyamofigo/lzw: 642a2cff98782747c679ee100d7b4b4146ebe2f3
[INFO] validating manifest of miyamofigo/lzw 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 miyamofigo/lzw 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 miyamofigo/lzw
[INFO] finished frobbing miyamofigo/lzw
[INFO] frobbed toml for miyamofigo/lzw written to work/ex/beta-1.37-6/sources/1.36.0/gh/miyamofigo/lzw/Cargo.toml
[INFO] started frobbing miyamofigo/lzw
[INFO] finished frobbing miyamofigo/lzw
[INFO] frobbed toml for miyamofigo/lzw written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/miyamofigo/lzw/Cargo.toml
[INFO] crate miyamofigo/lzw 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing miyamofigo/lzw 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-2/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/miyamofigo/lzw:/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] b94d812f4580e97c11e2be2d2989fd1f672e738b8b22ea96ee566845d9e2b123
[INFO] running `"docker" "start" "-a" "b94d812f4580e97c11e2be2d2989fd1f672e738b8b22ea96ee566845d9e2b123"`
[INFO] [stderr]    Compiling lzw v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:74:13
[INFO] [stderr]    |
[INFO] [stderr] 74 |         let mut entry: 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: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:115:9
[INFO] [stderr]     |
[INFO] [stderr] 115 |     let mut comp = compress("hello world");
[INFO] [stderr]     |         ----^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:119:9
[INFO] [stderr]     |
[INFO] [stderr] 119 |     let mut comp2 = compress("hello worldhello world");
[INFO] [stderr]     |         ----^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.15s
[INFO] running `"docker" "inspect" "b94d812f4580e97c11e2be2d2989fd1f672e738b8b22ea96ee566845d9e2b123"`
[INFO] running `"docker" "rm" "-f" "b94d812f4580e97c11e2be2d2989fd1f672e738b8b22ea96ee566845d9e2b123"`
[INFO] [stdout] b94d812f4580e97c11e2be2d2989fd1f672e738b8b22ea96ee566845d9e2b123
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/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/miyamofigo/lzw:/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] 61a05e1ea186b883d25f2302f22df0b117f55a9c2da56c0c29738f81c2af26d0
[INFO] running `"docker" "start" "-a" "61a05e1ea186b883d25f2302f22df0b117f55a9c2da56c0c29738f81c2af26d0"`
[INFO] [stderr]    Compiling lzw v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:74:13
[INFO] [stderr]    |
[INFO] [stderr] 74 |         let mut entry: 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: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:115:9
[INFO] [stderr]     |
[INFO] [stderr] 115 |     let mut comp = compress("hello world");
[INFO] [stderr]     |         ----^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:119:9
[INFO] [stderr]     |
[INFO] [stderr] 119 |     let mut comp2 = compress("hello worldhello world");
[INFO] [stderr]     |         ----^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.86s
[INFO] running `"docker" "inspect" "61a05e1ea186b883d25f2302f22df0b117f55a9c2da56c0c29738f81c2af26d0"`
[INFO] running `"docker" "rm" "-f" "61a05e1ea186b883d25f2302f22df0b117f55a9c2da56c0c29738f81c2af26d0"`
[INFO] [stdout] 61a05e1ea186b883d25f2302f22df0b117f55a9c2da56c0c29738f81c2af26d0
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/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/miyamofigo/lzw:/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] 0088500362cdad0008fce06260fe6edae37f8f55bda510e042f4e410181da3d9
[INFO] running `"docker" "start" "-a" "0088500362cdad0008fce06260fe6edae37f8f55bda510e042f4e410181da3d9"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/lzw-6fa6ca87f40d0f2c
[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" "0088500362cdad0008fce06260fe6edae37f8f55bda510e042f4e410181da3d9"`
[INFO] running `"docker" "rm" "-f" "0088500362cdad0008fce06260fe6edae37f8f55bda510e042f4e410181da3d9"`
[INFO] [stdout] 0088500362cdad0008fce06260fe6edae37f8f55bda510e042f4e410181da3d9