[INFO] fetching crate clarity-jupyter-kernel 0.4.0...
[INFO] testing clarity-jupyter-kernel-0.4.0 against master#ad85bc524b1ad696e42061ad8338d382dffbdbe5 for pr-146237
[INFO] extracting crate clarity-jupyter-kernel 0.4.0 into /workspace/builds/worker-1-tc1/source
[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-1-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate clarity-jupyter-kernel 0.4.0 on toolchain ad85bc524b1ad696e42061ad8338d382dffbdbe5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate clarity-jupyter-kernel 0.4.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded typenum v1.12.0
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[INFO] [stderr]   Downloaded rustc-demangle v0.1.18
[INFO] [stderr]   Downloaded hex v0.3.2
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[INFO] [stderr]   Downloaded zmq-sys v0.11.0
[INFO] [stderr]   Downloaded clarity-repl v0.3.0
[INFO] [stderr]   Downloaded libsecp256k1 v0.3.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7ee33c7c107531e9822f90b1a62c1916ddb0f9b60176cece08375dde8b6a3d70
[INFO] running `Command { std: "docker" "start" "-a" "7ee33c7c107531e9822f90b1a62c1916ddb0f9b60176cece08375dde8b6a3d70", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7ee33c7c107531e9822f90b1a62c1916ddb0f9b60176cece08375dde8b6a3d70", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7ee33c7c107531e9822f90b1a62c1916ddb0f9b60176cece08375dde8b6a3d70", kill_on_drop: false }`
[INFO] [stdout] 7ee33c7c107531e9822f90b1a62c1916ddb0f9b60176cece08375dde8b6a3d70
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2062cc896d1defc81c0199b47d71ed6f9985f3d6a4e532c7d17a924128d2e4ab
[INFO] running `Command { std: "docker" "start" "-a" "2062cc896d1defc81c0199b47d71ed6f9985f3d6a4e532c7d17a924128d2e4ab", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.85
[INFO] [stderr]    Compiling typenum v1.12.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling cc v1.0.66
[INFO] [stderr]    Compiling syn v1.0.60
[INFO] [stderr]    Compiling error-chain v0.10.0
[INFO] [stderr]    Compiling serde_derive v1.0.123
[INFO] [stderr]    Compiling pkg-config v0.3.19
[INFO] [stderr]    Compiling toml v0.2.1
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling byteorder v1.4.2
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling metadeps v1.1.2
[INFO] [stderr]    Compiling subtle v1.0.0
[INFO] [stderr]    Compiling serde v1.0.123
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling zmq-sys v0.11.0
[INFO] [stderr]    Compiling miniz_oxide v0.4.3
[INFO] [stderr]    Compiling crunchy v0.2.2
[INFO] [stderr]    Compiling quote v1.0.8
[INFO] [stderr]    Compiling nix v0.18.0
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling psm v0.1.12
[INFO] [stderr]    Compiling stacker v0.1.13
[INFO] [stderr]    Compiling adler v0.2.3
[INFO] [stderr]    Compiling serde_json v1.0.61
[INFO] [stderr]    Compiling generic-array v0.12.3
[INFO] [stderr]    Compiling once_cell v1.5.2
[INFO] [stderr]    Compiling gimli v0.23.0
[INFO] [stderr]    Compiling thread_local v1.1.3
[INFO] [stderr]    Compiling aho-corasick v0.7.15
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling digest v0.8.1
[INFO] [stderr]    Compiling block-buffer v0.7.3
[INFO] [stderr]    Compiling crypto-mac v0.7.0
[INFO] [stderr]    Compiling sha2 v0.8.2
[INFO] [stderr]    Compiling utf8parse v0.2.0
[INFO] [stderr]    Compiling hmac v0.7.1
[INFO] [stderr]    Compiling unicode-segmentation v1.7.1
[INFO] [stderr]    Compiling hmac-drbg v0.2.0
[INFO] [stderr]    Compiling arrayref v0.3.6
[INFO] [stderr]    Compiling regex-syntax v0.6.22
[INFO] [stderr]    Compiling rustc-demangle v0.1.18
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling dirs-sys-next v0.1.2
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling dirs-next v1.0.2
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling zmq v0.9.2
[INFO] [stderr]    Compiling subtle v2.4.0
[INFO] [stderr]    Compiling unicode-width v0.1.8
[INFO] [stderr]    Compiling object v0.23.0
[INFO] [stderr]    Compiling itoa v0.4.7
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling keccak v0.1.0
[INFO] [stderr]    Compiling sha3 v0.8.2
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling regex v1.4.3
[INFO] [stderr]    Compiling addr2line v0.14.1
[INFO] [stderr]    Compiling libsecp256k1 v0.3.5
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling time v0.1.43
[INFO] [stderr]    Compiling dirs-sys v0.3.5
[INFO] [stderr]    Compiling ripemd160 v0.8.0
[INFO] [stderr]    Compiling integer-sqrt v0.1.5
[INFO] [stderr]    Compiling ansi_term v0.12.1
[INFO] [stderr]    Compiling pico-args v0.3.4
[INFO] [stderr]    Compiling chrono v0.4.19
[INFO] [stderr]    Compiling dirs v2.0.2
[INFO] [stderr]    Compiling colored v1.9.3
[INFO] [stderr]    Compiling uuid v0.7.4
[INFO] [stderr]    Compiling json v0.11.15
[INFO] [stderr]    Compiling backtrace v0.3.56
[INFO] [stderr]    Compiling rustyline v6.3.0
[INFO] [stderr]    Compiling failure v0.1.8
[INFO] [stderr]    Compiling hex v0.3.2
[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)]` (part of `#[warn(unused)]`) 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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1m 22s
[INFO] running `Command { std: "docker" "inspect" "2062cc896d1defc81c0199b47d71ed6f9985f3d6a4e532c7d17a924128d2e4ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2062cc896d1defc81c0199b47d71ed6f9985f3d6a4e532c7d17a924128d2e4ab", kill_on_drop: false }`
[INFO] [stdout] 2062cc896d1defc81c0199b47d71ed6f9985f3d6a4e532c7d17a924128d2e4ab
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a54c94260972f29c074f4e9031be03342a5b7c7e53c433d4ee102007cb6640f2
[INFO] running `Command { std: "docker" "start" "-a" "a54c94260972f29c074f4e9031be03342a5b7c7e53c433d4ee102007cb6640f2", 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)]` (part of `#[warn(unused)]`) 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] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.69s
[INFO] running `Command { std: "docker" "inspect" "a54c94260972f29c074f4e9031be03342a5b7c7e53c433d4ee102007cb6640f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a54c94260972f29c074f4e9031be03342a5b7c7e53c433d4ee102007cb6640f2", kill_on_drop: false }`
[INFO] [stdout] a54c94260972f29c074f4e9031be03342a5b7c7e53c433d4ee102007cb6640f2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 734a297f2d55cb704ac020c1a9d2bb99959c9d492ed9d29279ee07b7ffa1243e
[INFO] running `Command { std: "docker" "start" "-a" "734a297f2d55cb704ac020c1a9d2bb99959c9d492ed9d29279ee07b7ffa1243e", 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)]` (part of `#[warn(unused)]`) 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 (run `cargo fix --bin "clarity-jupyter-kernel" --tests` to apply 2 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.12s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/clarity_jupyter_kernel-b4b6430be5519128)
[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" "734a297f2d55cb704ac020c1a9d2bb99959c9d492ed9d29279ee07b7ffa1243e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "734a297f2d55cb704ac020c1a9d2bb99959c9d492ed9d29279ee07b7ffa1243e", kill_on_drop: false }`
[INFO] [stdout] 734a297f2d55cb704ac020c1a9d2bb99959c9d492ed9d29279ee07b7ffa1243e