[INFO] updating cached repository Zengor/chat_np1
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Zengor/chat_np1
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Zengor/chat_np1" "work/ex/beta-1.37-6/sources/1.36.0/gh/Zengor/chat_np1"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/Zengor/chat_np1'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Zengor/chat_np1" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/Zengor/chat_np1"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/Zengor/chat_np1'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 74c8d54daffea6d844cea979c4e61f916ecd9954
[INFO] sha for GitHub repo Zengor/chat_np1: 74c8d54daffea6d844cea979c4e61f916ecd9954
[INFO] validating manifest of Zengor/chat_np1 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 Zengor/chat_np1 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 Zengor/chat_np1
[INFO] finished frobbing Zengor/chat_np1
[INFO] frobbed toml for Zengor/chat_np1 written to work/ex/beta-1.37-6/sources/1.36.0/gh/Zengor/chat_np1/Cargo.toml
[INFO] started frobbing Zengor/chat_np1
[INFO] finished frobbing Zengor/chat_np1
[INFO] frobbed toml for Zengor/chat_np1 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/Zengor/chat_np1/Cargo.toml
[INFO] crate Zengor/chat_np1 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] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing Zengor/chat_np1 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-3/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/Zengor/chat_np1:/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] 125eae9f8bba9779eec48ae56caa0e758cd470b932436bec10a14f86482d4e91
[INFO] running `"docker" "start" "-a" "125eae9f8bba9779eec48ae56caa0e758cd470b932436bec10a14f86482d4e91"`
[INFO] [stderr]    Compiling chat_np1 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/chatserver.rs:115:13
[INFO] [stderr]     |
[INFO] [stderr] 115 |         let mut group = match groups.get_mut(&group_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] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/chatserver.rs:136:13
[INFO] [stderr]     |
[INFO] [stderr] 136 |         let mut group = match groups.get_mut(&chat_name) {
[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/chatserver.rs:197:13
[INFO] [stderr]     |
[INFO] [stderr] 197 |         let mut group = groups.get_mut(&chat_name).unwrap();
[INFO] [stderr]     |             ----^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.17s
[INFO] running `"docker" "inspect" "125eae9f8bba9779eec48ae56caa0e758cd470b932436bec10a14f86482d4e91"`
[INFO] running `"docker" "rm" "-f" "125eae9f8bba9779eec48ae56caa0e758cd470b932436bec10a14f86482d4e91"`
[INFO] [stdout] 125eae9f8bba9779eec48ae56caa0e758cd470b932436bec10a14f86482d4e91
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/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/Zengor/chat_np1:/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] 0349b7c14b7351e48af5e8b057f776ec653d4a22797c2caafc05f374e17d25e2
[INFO] running `"docker" "start" "-a" "0349b7c14b7351e48af5e8b057f776ec653d4a22797c2caafc05f374e17d25e2"`
[INFO] [stderr]    Compiling chat_np1 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/chatserver.rs:115:13
[INFO] [stderr]     |
[INFO] [stderr] 115 |         let mut group = match groups.get_mut(&group_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] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/chatserver.rs:136:13
[INFO] [stderr]     |
[INFO] [stderr] 136 |         let mut group = match groups.get_mut(&chat_name) {
[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/chatserver.rs:197:13
[INFO] [stderr]     |
[INFO] [stderr] 197 |         let mut group = groups.get_mut(&chat_name).unwrap();
[INFO] [stderr]     |             ----^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.36s
[INFO] running `"docker" "inspect" "0349b7c14b7351e48af5e8b057f776ec653d4a22797c2caafc05f374e17d25e2"`
[INFO] running `"docker" "rm" "-f" "0349b7c14b7351e48af5e8b057f776ec653d4a22797c2caafc05f374e17d25e2"`
[INFO] [stdout] 0349b7c14b7351e48af5e8b057f776ec653d4a22797c2caafc05f374e17d25e2
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/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/Zengor/chat_np1:/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] 87d33438886118ef7a3ebd98eccb91ddd233353d725bcbd3ca4f1b05bdbd82c0
[INFO] running `"docker" "start" "-a" "87d33438886118ef7a3ebd98eccb91ddd233353d725bcbd3ca4f1b05bdbd82c0"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/chat_np1-f64a39aceb081b9f
[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/client-d9ce5dd5441a9ebd
[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-b857f449656d56fe
[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]    Doc-tests chat_np1
[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" "87d33438886118ef7a3ebd98eccb91ddd233353d725bcbd3ca4f1b05bdbd82c0"`
[INFO] running `"docker" "rm" "-f" "87d33438886118ef7a3ebd98eccb91ddd233353d725bcbd3ca4f1b05bdbd82c0"`
[INFO] [stdout] 87d33438886118ef7a3ebd98eccb91ddd233353d725bcbd3ca4f1b05bdbd82c0