[INFO] fetching crate clarity-jupyter-kernel 0.4.0... [INFO] checking clarity-jupyter-kernel-0.4.0 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback [INFO] extracting crate clarity-jupyter-kernel 0.4.0 into /workspace/builds/worker-4-tc1/source [INFO] validating manifest of crates.io crate clarity-jupyter-kernel 0.4.0 on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "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-4-tc1/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: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded once_cell v1.5.2 [INFO] [stderr] Downloaded generic-array v0.12.3 [INFO] [stderr] Downloaded zmq-sys v0.11.0 [INFO] [stderr] Downloaded zmq v0.9.2 [INFO] [stderr] Downloaded json v0.11.15 [INFO] [stderr] Downloaded subtle v2.4.0 [INFO] [stderr] Downloaded pico-args v0.3.4 [INFO] [stderr] Downloaded utf8parse v0.2.0 [INFO] [stderr] Downloaded stacker v0.1.13 [INFO] [stderr] Downloaded backtrace v0.3.56 [INFO] [stderr] Downloaded dirs-next v1.0.2 [INFO] [stderr] Downloaded redox_syscall v0.2.4 [INFO] [stderr] Downloaded rustyline v6.3.0 [INFO] [stderr] Downloaded object v0.23.0 [INFO] [stderr] Downloaded sha3 v0.8.2 [INFO] [stderr] Downloaded clarity-repl v0.3.0 [INFO] [stderr] Downloaded gimli v0.23.0 [INFO] [stderr] Downloaded libc v0.2.85 [INFO] [stderr] Downloaded addr2line v0.14.1 [INFO] [stderr] Downloaded psm v0.1.12 [INFO] [stderr] Downloaded serde_stacker v0.1.4 [INFO] [stderr] Downloaded redox_users v0.3.5 [INFO] [stderr] Downloaded dirs-sys v0.3.5 [INFO] [stderr] Downloaded rustc-demangle v0.1.18 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 6f58342667ba1b43d5ce4cd12e91a244ddc6cb8508d24c35484b7fd74a55d33c [INFO] running `Command { std: "docker" "start" "-a" "6f58342667ba1b43d5ce4cd12e91a244ddc6cb8508d24c35484b7fd74a55d33c", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "6f58342667ba1b43d5ce4cd12e91a244ddc6cb8508d24c35484b7fd74a55d33c", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "6f58342667ba1b43d5ce4cd12e91a244ddc6cb8508d24c35484b7fd74a55d33c", kill_on_drop: false }` [INFO] [stdout] 6f58342667ba1b43d5ce4cd12e91a244ddc6cb8508d24c35484b7fd74a55d33c [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 2f4b4260c633eeb8fe83500d6c8e8e9cd31076121e2cada1c020930ad29ce587 [INFO] running `Command { std: "docker" "start" "-a" "2f4b4260c633eeb8fe83500d6c8e8e9cd31076121e2cada1c020930ad29ce587", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.85 [INFO] [stderr] Compiling typenum v1.12.0 [INFO] [stderr] Compiling autocfg v0.1.7 [INFO] [stderr] Compiling cc v1.0.66 [INFO] [stderr] Compiling syn v1.0.60 [INFO] [stderr] Checking byte-tools v0.3.1 [INFO] [stderr] Compiling quote v1.0.8 [INFO] [stderr] Compiling num-traits v0.2.14 [INFO] [stderr] Checking block-padding v0.1.5 [INFO] [stderr] Checking byteorder v1.4.2 [INFO] [stderr] Compiling pkg-config v0.3.19 [INFO] [stderr] Compiling toml v0.2.1 [INFO] [stderr] Compiling error-chain v0.10.0 [INFO] [stderr] Compiling memchr v2.3.4 [INFO] [stderr] Compiling serde_derive v1.0.123 [INFO] [stderr] Compiling metadeps v1.1.2 [INFO] [stderr] Checking subtle v1.0.0 [INFO] [stderr] Compiling serde v1.0.123 [INFO] [stderr] Checking opaque-debug v0.2.3 [INFO] [stderr] Compiling log v0.4.14 [INFO] [stderr] Compiling zmq-sys v0.11.0 [INFO] [stderr] Compiling rand_pcg v0.1.2 [INFO] [stderr] Compiling psm v0.1.12 [INFO] [stderr] Compiling stacker v0.1.13 [INFO] [stderr] Compiling rand_chacha v0.1.1 [INFO] [stderr] Checking generic-array v0.12.3 [INFO] [stderr] Checking getrandom v0.1.16 [INFO] [stderr] Compiling miniz_oxide v0.4.3 [INFO] [stderr] Compiling crunchy v0.2.2 [INFO] [stderr] Checking ppv-lite86 v0.2.10 [INFO] [stderr] Checking rand_core v0.5.1 [INFO] [stderr] Compiling nix v0.18.0 [INFO] [stderr] Checking digest v0.8.1 [INFO] [stderr] Checking block-buffer v0.7.3 [INFO] [stderr] Checking crypto-mac v0.7.0 [INFO] [stderr] Checking hmac v0.7.1 [INFO] [stderr] Checking dirs-sys-next v0.1.2 [INFO] [stderr] Compiling rand v0.6.5 [INFO] [stderr] Compiling num-integer v0.1.44 [INFO] [stderr] Checking once_cell v1.5.2 [INFO] [stderr] Checking adler v0.2.3 [INFO] [stderr] Compiling serde_json v1.0.61 [INFO] [stderr] Checking rand_chacha v0.2.2 [INFO] [stderr] Checking fake-simd v0.1.2 [INFO] [stderr] Checking gimli v0.23.0 [INFO] [stderr] Checking thread_local v1.1.3 [INFO] [stderr] Checking sha2 v0.8.2 [INFO] [stderr] Checking rand v0.7.3 [INFO] [stderr] Checking dirs-next v1.0.2 [INFO] [stderr] Checking hmac-drbg v0.2.0 [INFO] [stderr] Checking rand_os v0.1.3 [INFO] [stderr] Checking aho-corasick v0.7.15 [INFO] [stderr] Checking rustc-demangle v0.1.18 [INFO] [stderr] Checking object v0.23.0 [INFO] [stderr] Checking unicode-segmentation v1.7.1 [INFO] [stderr] Checking utf8parse v0.2.0 [INFO] [stderr] Checking subtle v2.4.0 [INFO] [stderr] Checking arrayref v0.3.6 [INFO] [stderr] Checking regex-syntax v0.6.22 [INFO] [stderr] Compiling zmq v0.9.2 [INFO] [stderr] Checking keccak v0.1.0 [INFO] [stderr] Checking itoa v0.4.7 [INFO] [stderr] Checking sha3 v0.8.2 [INFO] [stderr] Checking libsecp256k1 v0.3.5 [INFO] [stderr] Checking ripemd160 v0.8.0 [INFO] [stderr] Checking addr2line v0.14.1 [INFO] [stderr] Checking integer-sqrt v0.1.5 [INFO] [stderr] Checking dirs-sys v0.3.5 [INFO] [stderr] Checking time v0.1.43 [INFO] [stderr] Checking atty v0.2.14 [INFO] [stderr] Checking pico-args v0.3.4 [INFO] [stderr] Checking colored v1.9.3 [INFO] [stderr] Checking dirs v2.0.2 [INFO] [stderr] Checking uuid v0.7.4 [INFO] [stderr] Checking chrono v0.4.19 [INFO] [stderr] Checking hex v0.3.2 [INFO] [stderr] Checking backtrace v0.3.56 [INFO] [stderr] Checking json v0.11.15 [INFO] [stderr] Checking regex v1.4.3 [INFO] [stderr] Checking failure v0.1.8 [INFO] [stderr] Checking rustyline v6.3.0 [INFO] [stderr] Checking serde_stacker v0.1.4 [INFO] [stderr] Checking clarity-repl v0.3.0 [INFO] [stderr] Checking 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: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: 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] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 11.21s [INFO] running `Command { std: "docker" "inspect" "2f4b4260c633eeb8fe83500d6c8e8e9cd31076121e2cada1c020930ad29ce587", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "2f4b4260c633eeb8fe83500d6c8e8e9cd31076121e2cada1c020930ad29ce587", kill_on_drop: false }` [INFO] [stdout] 2f4b4260c633eeb8fe83500d6c8e8e9cd31076121e2cada1c020930ad29ce587