[INFO] fetching crate clarity-jupyter-kernel 0.4.0...
[INFO] testing clarity-jupyter-kernel-0.4.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate clarity-jupyter-kernel 0.4.0 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate clarity-jupyter-kernel 0.4.0 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate clarity-jupyter-kernel 0.4.0
[INFO] finished tweaking crates.io crate clarity-jupyter-kernel 0.4.0
[INFO] tweaked toml for crates.io crate clarity-jupyter-kernel 0.4.0 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate crates.io crate clarity-jupyter-kernel 0.4.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 49e97afe055049b4c879fc6c4acc36980eb431d858761c7450e0bd7300739c05
[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" "49e97afe055049b4c879fc6c4acc36980eb431d858761c7450e0bd7300739c05", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "49e97afe055049b4c879fc6c4acc36980eb431d858761c7450e0bd7300739c05", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "49e97afe055049b4c879fc6c4acc36980eb431d858761c7450e0bd7300739c05", kill_on_drop: false }`
[INFO] [stdout] 49e97afe055049b4c879fc6c4acc36980eb431d858761c7450e0bd7300739c05
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4e5a08a03bc7d26b9ff32559b05310107187f89fa71f6392b9ee681412ff9cbc
[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" "4e5a08a03bc7d26b9ff32559b05310107187f89fa71f6392b9ee681412ff9cbc", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.85
[INFO] [stderr]    Compiling syn v1.0.60
[INFO] [stderr]    Compiling toml v0.2.1
[INFO] [stderr]    Compiling error-chain v0.10.0
[INFO] [stderr]    Compiling serde v1.0.123
[INFO] [stderr]    Compiling subtle v1.0.0
[INFO] [stderr]    Compiling crunchy v0.2.2
[INFO] [stderr]    Compiling serde_json v1.0.61
[INFO] [stderr]    Compiling gimli v0.23.0
[INFO] [stderr]    Compiling rustc-demangle v0.1.18
[INFO] [stderr]    Compiling zmq v0.9.2
[INFO] [stderr]    Compiling subtle v2.4.0
[INFO] [stderr]    Compiling object v0.23.0
[INFO] [stderr]    Compiling hex v0.3.2
[INFO] [stderr]    Compiling json v0.11.15
[INFO] [stderr]    Compiling psm v0.1.12
[INFO] [stderr]    Compiling miniz_oxide v0.4.3
[INFO] [stderr]    Compiling stacker v0.1.13
[INFO] [stderr]    Compiling crypto-mac v0.7.0
[INFO] [stderr]    Compiling metadeps v1.1.2
[INFO] [stderr]    Compiling hmac v0.7.1
[INFO] [stderr]    Compiling hmac-drbg v0.2.0
[INFO] [stderr]    Compiling zmq-sys v0.11.0
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling dirs-sys-next v0.1.2
[INFO] [stderr]    Compiling nix v0.18.0
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling dirs-sys v0.3.5
[INFO] [stderr]    Compiling time v0.1.43
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling colored v1.9.3
[INFO] [stderr]    Compiling dirs v2.0.2
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling dirs-next v1.0.2
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling chrono v0.4.19
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling addr2line v0.14.1
[INFO] [stderr]    Compiling backtrace v0.3.56
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling serde_derive v1.0.123
[INFO] [stderr]    Compiling uuid v0.7.4
[INFO] [stderr]    Compiling failure v0.1.8
[INFO] [stderr]    Compiling libsecp256k1 v0.3.5
[INFO] [stderr]    Compiling rustyline v6.3.0
[INFO] [stderr]    Compiling serde_stacker v0.1.4
[INFO] [stderr]    Compiling clarity-repl v0.3.0
[INFO] [stderr]    Compiling clarity-jupyter-kernel v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/jupyter/core.rs:81:14
[INFO] [stdout]    |
[INFO] [stdout] 81 |         let (mut context, outputs) = CommandContext::new()?;
[INFO] [stdout]    |              ----^^^^^^^
[INFO] [stdout]    |              |
[INFO] [stdout]    |              help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/jupyter/core.rs:138:9
[INFO] [stdout]     |
[INFO] [stdout] 138 |         mut context: CommandContext,
[INFO] [stdout]     |         ----^^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 09s
[INFO] running `Command { std: "docker" "inspect" "4e5a08a03bc7d26b9ff32559b05310107187f89fa71f6392b9ee681412ff9cbc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4e5a08a03bc7d26b9ff32559b05310107187f89fa71f6392b9ee681412ff9cbc", kill_on_drop: false }`
[INFO] [stdout] 4e5a08a03bc7d26b9ff32559b05310107187f89fa71f6392b9ee681412ff9cbc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 50e45a0170fd2c860bdb7969a1d412c121ebcb17a7c75eaa944d444d97c0b2da
[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" "50e45a0170fd2c860bdb7969a1d412c121ebcb17a7c75eaa944d444d97c0b2da", kill_on_drop: false }`
[INFO] [stderr]    Compiling clarity-jupyter-kernel v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/jupyter/core.rs:81:14
[INFO] [stdout]    |
[INFO] [stdout] 81 |         let (mut context, outputs) = CommandContext::new()?;
[INFO] [stdout]    |              ----^^^^^^^
[INFO] [stdout]    |              |
[INFO] [stdout]    |              help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/jupyter/core.rs:138:9
[INFO] [stdout]     |
[INFO] [stdout] 138 |         mut context: CommandContext,
[INFO] [stdout]     |         ----^^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.47s
[INFO] running `Command { std: "docker" "inspect" "50e45a0170fd2c860bdb7969a1d412c121ebcb17a7c75eaa944d444d97c0b2da", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "50e45a0170fd2c860bdb7969a1d412c121ebcb17a7c75eaa944d444d97c0b2da", kill_on_drop: false }`
[INFO] [stdout] 50e45a0170fd2c860bdb7969a1d412c121ebcb17a7c75eaa944d444d97c0b2da
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "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] d8ae65083a2cc178970715858ff685c3038c94351fde92facf93736e84ebe948
[INFO] running `Command { std: "docker" "start" "-a" "d8ae65083a2cc178970715858ff685c3038c94351fde92facf93736e84ebe948", kill_on_drop: false }`
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/jupyter/core.rs:81:14
[INFO] [stderr]    |
[INFO] [stderr] 81 |         let (mut context, outputs) = CommandContext::new()?;
[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/jupyter/core.rs:138:9
[INFO] [stderr]     |
[INFO] [stderr] 138 |         mut context: CommandContext,
[INFO] [stderr]     |         ----^^^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: `clarity-jupyter-kernel` (bin "clarity-jupyter-kernel" test) generated 2 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.09s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/clarity_jupyter_kernel-42333f7749f1d1f9)
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "d8ae65083a2cc178970715858ff685c3038c94351fde92facf93736e84ebe948", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d8ae65083a2cc178970715858ff685c3038c94351fde92facf93736e84ebe948", kill_on_drop: false }`
[INFO] [stdout] d8ae65083a2cc178970715858ff685c3038c94351fde92facf93736e84ebe948