[INFO] fetching crate jupyterm 0.1.0... [INFO] checking jupyterm-0.1.0 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback [INFO] extracting crate jupyterm 0.1.0 into /workspace/builds/worker-1-tc1/source [INFO] validating manifest of crates.io crate jupyterm 0.1.0 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 jupyterm 0.1.0 [INFO] finished tweaking crates.io crate jupyterm 0.1.0 [INFO] tweaked toml for crates.io crate jupyterm 0.1.0 written to /workspace/builds/worker-1-tc1/source/Cargo.toml [INFO] crate crates.io crate jupyterm 0.1.0 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] Updating crates.io index [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded sha2 v0.9.1 [INFO] [stderr] Downloaded zmq v0.9.2 [INFO] [stderr] Downloaded inventory-impl v0.1.9 [INFO] [stderr] Downloaded pyo3cls v0.12.3 [INFO] [stderr] Downloaded toml v0.2.1 [INFO] [stderr] Downloaded indoc-impl v0.3.6 [INFO] [stderr] Downloaded subtle v2.3.0 [INFO] [stderr] Downloaded inventory v0.1.9 [INFO] [stderr] Downloaded pyo3 v0.12.3 [INFO] [stderr] Downloaded indoc v0.3.6 [INFO] [stderr] Downloaded pyo3-derive-backend v0.12.3 [INFO] [stderr] Downloaded ctor v0.1.16 [INFO] [stderr] Downloaded ghost v0.1.2 [INFO] [stderr] Downloaded lock_api v0.4.1 [INFO] [stderr] Downloaded cloudabi v0.1.0 [INFO] [stderr] Downloaded smallvec v1.4.2 [INFO] [stderr] Downloaded parking_lot_core v0.8.0 [INFO] [stderr] Downloaded parking_lot v0.11.0 [INFO] [stderr] Downloaded instant v0.1.8 [INFO] [stderr] Downloaded metadeps v1.1.2 [INFO] [stderr] Downloaded zmq-sys v0.11.0 [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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 191a48d0c6cede933077ab1be4e1fd63ffaa340de53b252e75630162f83f146b [INFO] running `Command { std: "docker" "start" "-a" "191a48d0c6cede933077ab1be4e1fd63ffaa340de53b252e75630162f83f146b", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "191a48d0c6cede933077ab1be4e1fd63ffaa340de53b252e75630162f83f146b", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "191a48d0c6cede933077ab1be4e1fd63ffaa340de53b252e75630162f83f146b", kill_on_drop: false }` [INFO] [stdout] 191a48d0c6cede933077ab1be4e1fd63ffaa340de53b252e75630162f83f146b [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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 003a958c2cfe7ea86065aeff0690bae88520ac7bbfc9d419f9bea715a5e1574f [INFO] running `Command { std: "docker" "start" "-a" "003a958c2cfe7ea86065aeff0690bae88520ac7bbfc9d419f9bea715a5e1574f", kill_on_drop: false }` [INFO] [stderr] Compiling syn v1.0.48 [INFO] [stderr] Compiling typenum v1.12.0 [INFO] [stderr] Compiling libc v0.2.80 [INFO] [stderr] Compiling toml v0.2.1 [INFO] [stderr] Compiling error-chain v0.10.0 [INFO] [stderr] Compiling proc-macro-hack v0.5.18 [INFO] [stderr] Compiling inventory v0.1.9 [INFO] [stderr] Compiling serde v1.0.117 [INFO] [stderr] Compiling generic-array v0.14.4 [INFO] [stderr] Checking instant v0.1.8 [INFO] [stderr] Checking smallvec v1.4.2 [INFO] [stderr] Compiling unindent v0.1.7 [INFO] [stderr] Compiling quote v1.0.7 [INFO] [stderr] Checking lock_api v0.4.1 [INFO] [stderr] Compiling zmq v0.9.2 [INFO] [stderr] Checking subtle v2.3.0 [INFO] [stderr] Compiling serde_json v1.0.59 [INFO] [stderr] Compiling pyo3 v0.12.3 [INFO] [stderr] Checking opaque-debug v0.3.0 [INFO] [stderr] Checking itoa v0.4.6 [INFO] [stderr] Checking cpuid-bool v0.1.2 [INFO] [stderr] Compiling metadeps v1.1.2 [INFO] [stderr] Compiling zmq-sys v0.11.0 [INFO] [stderr] Compiling paste-impl v0.1.18 [INFO] [stderr] Checking parking_lot_core v0.8.0 [INFO] [stderr] Checking parking_lot v0.11.0 [INFO] [stderr] Checking paste v0.1.18 [INFO] [stderr] Checking digest v0.9.0 [INFO] [stderr] Checking block-buffer v0.9.0 [INFO] [stderr] Checking crypto-mac v0.10.0 [INFO] [stderr] Checking sha2 v0.9.1 [INFO] [stderr] Checking hmac v0.10.1 [INFO] [stderr] Compiling pyo3-derive-backend v0.12.3 [INFO] [stderr] Compiling ghost v0.1.2 [INFO] [stderr] Compiling indoc-impl v0.3.6 [INFO] [stderr] Compiling inventory-impl v0.1.9 [INFO] [stderr] Compiling ctor v0.1.16 [INFO] [stderr] Checking indoc v0.3.6 [INFO] [stderr] Compiling pyo3cls v0.12.3 [INFO] [stderr] Checking jupyterm v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: the item `zmq` is imported redundantly [INFO] [stdout] --> src/main.rs:8:5 [INFO] [stdout] | [INFO] [stdout] 8 | use zmq; [INFO] [stdout] | ^^^ the item `zmq` is already defined by prelude [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the item `zmq` is imported redundantly [INFO] [stdout] --> src/main.rs:8:5 [INFO] [stdout] | [INFO] [stdout] 8 | use zmq; [INFO] [stdout] | ^^^ the item `zmq` is already defined by prelude [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:14:9 [INFO] [stdout] | [INFO] [stdout] 14 | let mut channel: zmq::Socket; [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/main.rs:14:9 [INFO] [stdout] | [INFO] [stdout] 14 | let mut channel: zmq::Socket; [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: value assigned to `execution_state` is never read [INFO] [stdout] --> src/main.rs:222:13 [INFO] [stdout] | [INFO] [stdout] 222 | let mut execution_state = "idle"; [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] = note: `#[warn(unused_assignments)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `execution_state` is never read [INFO] [stdout] --> src/main.rs:222:13 [INFO] [stdout] | [INFO] [stdout] 222 | let mut execution_state = "idle"; [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] = note: `#[warn(unused_assignments)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `print_type_of` is never used [INFO] [stdout] --> src/main.rs:48:4 [INFO] [stdout] | [INFO] [stdout] 48 | fn print_type_of(_: &T) { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `key` is never read [INFO] [stdout] --> src/main.rs:53:5 [INFO] [stdout] | [INFO] [stdout] 52 | struct Session { [INFO] [stdout] | ------- field in this struct [INFO] [stdout] 53 | key: Value, [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `print_type_of` is never used [INFO] [stdout] --> src/main.rs:48:4 [INFO] [stdout] | [INFO] [stdout] 48 | fn print_type_of(_: &T) { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `key` is never read [INFO] [stdout] --> src/main.rs:53:5 [INFO] [stdout] | [INFO] [stdout] 52 | struct Session { [INFO] [stdout] | ------- field in this struct [INFO] [stdout] 53 | key: Value, [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 5 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 5 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.35s [INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: pyo3 v0.12.3, pyo3-derive-backend v0.12.3 [INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 2` [INFO] running `Command { std: "docker" "inspect" "003a958c2cfe7ea86065aeff0690bae88520ac7bbfc9d419f9bea715a5e1574f", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "003a958c2cfe7ea86065aeff0690bae88520ac7bbfc9d419f9bea715a5e1574f", kill_on_drop: false }` [INFO] [stdout] 003a958c2cfe7ea86065aeff0690bae88520ac7bbfc9d419f9bea715a5e1574f