[INFO] cloning repository https://github.com/brainsik/rustbook-ch13-cacher
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/brainsik/rustbook-ch13-cacher" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbrainsik%2Frustbook-ch13-cacher", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbrainsik%2Frustbook-ch13-cacher'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 45a6073f7624e06885d6a0eb0f6568a0c40845da
[INFO] testing brainsik/rustbook-ch13-cacher against beta-2020-07-24 for beta-1.46-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbrainsik%2Frustbook-ch13-cacher" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/brainsik/rustbook-ch13-cacher on toolchain beta-2020-07-24
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/brainsik/rustbook-ch13-cacher
[INFO] finished tweaking git repo https://github.com/brainsik/rustbook-ch13-cacher
[INFO] tweaked toml for git repo https://github.com/brainsik/rustbook-ch13-cacher written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/brainsik/rustbook-ch13-cacher already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b3de060ca244824dca9ad1944a03d31bbd9a8d7a055985c2360782800e924b17
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "b3de060ca244824dca9ad1944a03d31bbd9a8d7a055985c2360782800e924b17", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b3de060ca244824dca9ad1944a03d31bbd9a8d7a055985c2360782800e924b17", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b3de060ca244824dca9ad1944a03d31bbd9a8d7a055985c2360782800e924b17", kill_on_drop: false }`
[INFO] [stdout] b3de060ca244824dca9ad1944a03d31bbd9a8d7a055985c2360782800e924b17
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] d890eb41319d6f7e3f5dc9dbc22e224d6e308939b0e7221c450d0ee1a79664ef
[INFO] running `Command { std: "docker" "start" "-a" "d890eb41319d6f7e3f5dc9dbc22e224d6e308939b0e7221c450d0ee1a79664ef", kill_on_drop: false }`
[INFO] [stderr]    Compiling rustbook-ch13-cacher v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct is never constructed: `Cacher`
[INFO] [stdout]  --> src/lib.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Cacher<T, U, V>
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/lib.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 |     fn new(calculation: T) -> Cacher<T, U, V> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `value`
[INFO] [stdout]   --> src/lib.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 |     fn value(&mut self, arg: U) -> V {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.17s
[INFO] running `Command { std: "docker" "inspect" "d890eb41319d6f7e3f5dc9dbc22e224d6e308939b0e7221c450d0ee1a79664ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d890eb41319d6f7e3f5dc9dbc22e224d6e308939b0e7221c450d0ee1a79664ef", kill_on_drop: false }`
[INFO] [stdout] d890eb41319d6f7e3f5dc9dbc22e224d6e308939b0e7221c450d0ee1a79664ef
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d1c5b2cb4e87200bc5a8b9a91465ce10c5047e5f9e1b72ec5a212b76222f8d5e
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "d1c5b2cb4e87200bc5a8b9a91465ce10c5047e5f9e1b72ec5a212b76222f8d5e", kill_on_drop: false }`
[INFO] [stderr]    Compiling rustbook-ch13-cacher v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct is never constructed: `Cacher`
[INFO] [stdout]  --> src/lib.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Cacher<T, U, V>
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/lib.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 |     fn new(calculation: T) -> Cacher<T, U, V> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `value`
[INFO] [stdout]   --> src/lib.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 |     fn value(&mut self, arg: U) -> V {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.21s
[INFO] running `Command { std: "docker" "inspect" "d1c5b2cb4e87200bc5a8b9a91465ce10c5047e5f9e1b72ec5a212b76222f8d5e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d1c5b2cb4e87200bc5a8b9a91465ce10c5047e5f9e1b72ec5a212b76222f8d5e", kill_on_drop: false }`
[INFO] [stdout] d1c5b2cb4e87200bc5a8b9a91465ce10c5047e5f9e1b72ec5a212b76222f8d5e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "test" "--frozen", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 80a82af13671aebd39c1c16d1037721fae95800a0fd3c02381c15de1397fd3cf
[INFO] running `Command { std: "docker" "start" "-a" "80a82af13671aebd39c1c16d1037721fae95800a0fd3c02381c15de1397fd3cf", kill_on_drop: false }`
[INFO] [stderr] warning: struct is never constructed: `Cacher`
[INFO] [stderr]  --> src/lib.rs:3:8
[INFO] [stderr]   |
[INFO] [stderr] 3 | struct Cacher<T, U, V>
[INFO] [stderr]   |        ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/lib.rs:17:8
[INFO] [stderr]    |
[INFO] [stderr] 17 |     fn new(calculation: T) -> Cacher<T, U, V> {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `value`
[INFO] [stderr]   --> src/lib.rs:24:8
[INFO] [stderr]    |
[INFO] [stderr] 24 |     fn value(&mut self, arg: U) -> V {
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/rustbook_ch13_cacher-cb6ae8964a2b9306
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test tests::call_with_different_values ... ok
[INFO] [stderr]    Doc-tests rustbook-ch13-cacher
[INFO] [stdout] test tests::call_with_different_types ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[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 `Command { std: "docker" "inspect" "80a82af13671aebd39c1c16d1037721fae95800a0fd3c02381c15de1397fd3cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "80a82af13671aebd39c1c16d1037721fae95800a0fd3c02381c15de1397fd3cf", kill_on_drop: false }`
[INFO] [stdout] 80a82af13671aebd39c1c16d1037721fae95800a0fd3c02381c15de1397fd3cf