[INFO] updating cached repository Elrohil44/Chat
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Elrohil44/Chat
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Elrohil44/Chat" "work/ex/beta-1.37-6/sources/1.36.0/gh/Elrohil44/Chat"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/Elrohil44/Chat'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Elrohil44/Chat" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/Elrohil44/Chat"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/Elrohil44/Chat'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 3530bf8acef7cc2c527da831b0fd2f1a0ecbb88d
[INFO] sha for GitHub repo Elrohil44/Chat: 3530bf8acef7cc2c527da831b0fd2f1a0ecbb88d
[INFO] validating manifest of Elrohil44/Chat 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 Elrohil44/Chat 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 Elrohil44/Chat
[INFO] finished frobbing Elrohil44/Chat
[INFO] frobbed toml for Elrohil44/Chat written to work/ex/beta-1.37-6/sources/1.36.0/gh/Elrohil44/Chat/Cargo.toml
[INFO] started frobbing Elrohil44/Chat
[INFO] finished frobbing Elrohil44/Chat
[INFO] frobbed toml for Elrohil44/Chat written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/Elrohil44/Chat/Cargo.toml
[INFO] crate Elrohil44/Chat 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 Elrohil44/Chat 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-1/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/Elrohil44/Chat:/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] dabccf50bdf34bf9a9df92c1d8eabd3fe56d031f3d5f37dd7a54ea54c8fcd3c4
[INFO] running `"docker" "start" "-a" "dabccf50bdf34bf9a9df92c1d8eabd3fe56d031f3d5f37dd7a54ea54c8fcd3c4"`
[INFO] [stderr]    Compiling threadpool v1.7.1
[INFO] [stderr]    Compiling chat v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/bin/server.rs:89:37
[INFO] [stderr]    |
[INFO] [stderr] 89 |                                 let mut clients_locked = clients.lock().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 3.55s
[INFO] running `"docker" "inspect" "dabccf50bdf34bf9a9df92c1d8eabd3fe56d031f3d5f37dd7a54ea54c8fcd3c4"`
[INFO] running `"docker" "rm" "-f" "dabccf50bdf34bf9a9df92c1d8eabd3fe56d031f3d5f37dd7a54ea54c8fcd3c4"`
[INFO] [stdout] dabccf50bdf34bf9a9df92c1d8eabd3fe56d031f3d5f37dd7a54ea54c8fcd3c4
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/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/Elrohil44/Chat:/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] 90f680e2daa5201a007dc000766ad9b0c7073bbf4617ba1aae559a386501bd38
[INFO] running `"docker" "start" "-a" "90f680e2daa5201a007dc000766ad9b0c7073bbf4617ba1aae559a386501bd38"`
[INFO] [stderr]    Compiling chat v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/bin/server.rs:89:37
[INFO] [stderr]    |
[INFO] [stderr] 89 |                                 let mut clients_locked = clients.lock().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 1.24s
[INFO] running `"docker" "inspect" "90f680e2daa5201a007dc000766ad9b0c7073bbf4617ba1aae559a386501bd38"`
[INFO] running `"docker" "rm" "-f" "90f680e2daa5201a007dc000766ad9b0c7073bbf4617ba1aae559a386501bd38"`
[INFO] [stdout] 90f680e2daa5201a007dc000766ad9b0c7073bbf4617ba1aae559a386501bd38
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/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/Elrohil44/Chat:/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] 45bbe5d1fd03a41885b785eabaf57a0a2bc1de08259829b4039b6476f49199f8
[INFO] running `"docker" "start" "-a" "45bbe5d1fd03a41885b785eabaf57a0a2bc1de08259829b4039b6476f49199f8"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/chat-5a70b8a0f4de6805
[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] [stderr]      Running /opt/crater/target/debug/deps/server-f4cf902c249fb52a
[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" "45bbe5d1fd03a41885b785eabaf57a0a2bc1de08259829b4039b6476f49199f8"`
[INFO] running `"docker" "rm" "-f" "45bbe5d1fd03a41885b785eabaf57a0a2bc1de08259829b4039b6476f49199f8"`
[INFO] [stdout] 45bbe5d1fd03a41885b785eabaf57a0a2bc1de08259829b4039b6476f49199f8