[INFO] updating cached repository knknkn1162/rust_server_test
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/knknkn1162/rust_server_test
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/knknkn1162/rust_server_test" "work/ex/beta-1.38-1/sources/1.37.0/gh/knknkn1162/rust_server_test"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/knknkn1162/rust_server_test'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/knknkn1162/rust_server_test" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/knknkn1162/rust_server_test"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/knknkn1162/rust_server_test'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 08eb0ad0f81838ed253bb2870c88af01c51a104d
[INFO] sha for GitHub repo knknkn1162/rust_server_test: 08eb0ad0f81838ed253bb2870c88af01c51a104d
[INFO] validating manifest of knknkn1162/rust_server_test 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 knknkn1162/rust_server_test 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 knknkn1162/rust_server_test
[INFO] finished frobbing knknkn1162/rust_server_test
[INFO] frobbed toml for knknkn1162/rust_server_test written to work/ex/beta-1.38-1/sources/1.37.0/gh/knknkn1162/rust_server_test/Cargo.toml
[INFO] started frobbing knknkn1162/rust_server_test
[INFO] finished frobbing knknkn1162/rust_server_test
[INFO] frobbed toml for knknkn1162/rust_server_test written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/knknkn1162/rust_server_test/Cargo.toml
[INFO] crate knknkn1162/rust_server_test 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing knknkn1162/rust_server_test 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/knknkn1162/rust_server_test:/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] 8351c3bfbc08a9784bd91de20dca5bab7e81077314e004ddb0bb995f702cedf1
[INFO] running `"docker" "start" "-a" "8351c3bfbc08a9784bd91de20dca5bab7e81077314e004ddb0bb995f702cedf1"`
[INFO] [stderr]    Compiling tokio-io v0.1.4
[INFO] [stderr]    Compiling thread_local v0.3.4
[INFO] [stderr]    Compiling regex v0.2.2
[INFO] [stderr]    Compiling tokio-core v0.1.10
[INFO] [stderr]    Compiling tokio-proto v0.1.1
[INFO] [stderr]    Compiling env_logger v0.4.3
[INFO] [stderr]    Compiling simple_line v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `Future`
[INFO] [stderr]   --> src/main.rs:16:23
[INFO] [stderr]    |
[INFO] [stderr] 16 | use futures::{future, Future};
[INFO] [stderr]    |                       ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:151:9
[INFO] [stderr]     |
[INFO] [stderr] 151 |     let mut server = TcpServer::new(Http, addr);
[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 12.11s
[INFO] running `"docker" "inspect" "8351c3bfbc08a9784bd91de20dca5bab7e81077314e004ddb0bb995f702cedf1"`
[INFO] running `"docker" "rm" "-f" "8351c3bfbc08a9784bd91de20dca5bab7e81077314e004ddb0bb995f702cedf1"`
[INFO] [stdout] 8351c3bfbc08a9784bd91de20dca5bab7e81077314e004ddb0bb995f702cedf1
[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/knknkn1162/rust_server_test:/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] d004ad7cd4138f8c33fa9036b6f0f32b61b303fac568c98d970884d81728b809
[INFO] running `"docker" "start" "-a" "d004ad7cd4138f8c33fa9036b6f0f32b61b303fac568c98d970884d81728b809"`
[INFO] [stderr]    Compiling simple_line v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `Future`
[INFO] [stderr]   --> src/main.rs:16:23
[INFO] [stderr]    |
[INFO] [stderr] 16 | use futures::{future, Future};
[INFO] [stderr]    |                       ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:151:9
[INFO] [stderr]     |
[INFO] [stderr] 151 |     let mut server = TcpServer::new(Http, addr);
[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 0.72s
[INFO] running `"docker" "inspect" "d004ad7cd4138f8c33fa9036b6f0f32b61b303fac568c98d970884d81728b809"`
[INFO] running `"docker" "rm" "-f" "d004ad7cd4138f8c33fa9036b6f0f32b61b303fac568c98d970884d81728b809"`
[INFO] [stdout] d004ad7cd4138f8c33fa9036b6f0f32b61b303fac568c98d970884d81728b809
[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/knknkn1162/rust_server_test:/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] b21bdca7c997576b4c87c5765d1a13bf08920254a24c44291e88749c7490e9d6
[INFO] running `"docker" "start" "-a" "b21bdca7c997576b4c87c5765d1a13bf08920254a24c44291e88749c7490e9d6"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/simple_line-b40ad4354da35e9a
[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" "b21bdca7c997576b4c87c5765d1a13bf08920254a24c44291e88749c7490e9d6"`
[INFO] running `"docker" "rm" "-f" "b21bdca7c997576b4c87c5765d1a13bf08920254a24c44291e88749c7490e9d6"`
[INFO] [stdout] b21bdca7c997576b4c87c5765d1a13bf08920254a24c44291e88749c7490e9d6