[INFO] fetching crate evcxr_jupyter 0.16.0...
[INFO] checking evcxr_jupyter-0.16.0 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate evcxr_jupyter 0.16.0 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate evcxr_jupyter 0.16.0 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 evcxr_jupyter 0.16.0
[INFO] finished tweaking crates.io crate evcxr_jupyter 0.16.0
[INFO] tweaked toml for crates.io crate evcxr_jupyter 0.16.0 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate crates.io crate evcxr_jupyter 0.16.0 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]  Downloading crates ...
[INFO] [stderr]   Downloaded mimalloc v0.1.38
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[INFO] [stderr]   Downloaded evcxr v0.16.0
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 30cc3f3b00ef13b16eca3fb217b1cc216ff623eb5dafd809deb1fac98b796e74
[INFO] running `Command { std: "docker" "start" "-a" "30cc3f3b00ef13b16eca3fb217b1cc216ff623eb5dafd809deb1fac98b796e74", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "30cc3f3b00ef13b16eca3fb217b1cc216ff623eb5dafd809deb1fac98b796e74", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "30cc3f3b00ef13b16eca3fb217b1cc216ff623eb5dafd809deb1fac98b796e74", kill_on_drop: false }`
[INFO] [stdout] 30cc3f3b00ef13b16eca3fb217b1cc216ff623eb5dafd809deb1fac98b796e74
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] a74a7ce552f27c5ebf847d423af818a02eaf2b324f196a5d93c90d9eab12c996
[INFO] running `Command { std: "docker" "start" "-a" "a74a7ce552f27c5ebf847d423af818a02eaf2b324f196a5d93c90d9eab12c996", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
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[INFO] [stderr]     Checking chalk-recursive v0.93.0
[INFO] [stderr]    Compiling evcxr v0.16.0
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[INFO] [stderr]     Checking cargo_metadata v0.15.4
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[INFO] [stderr]     Checking toml v0.8.0
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[INFO] [stderr]     Checking ra_ap_hir_expand v0.0.181
[INFO] [stderr]     Checking ra_ap_hir_def v0.0.181
[INFO] [stderr]     Checking ra_ap_hir_ty v0.0.181
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[INFO] [stderr]     Checking ra_ap_ide_completion v0.0.181
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[INFO] [stderr]     Checking ra_ap_ide v0.0.181
[INFO] [stderr]     Checking evcxr_jupyter v0.16.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `json` is imported redundantly
[INFO] [stdout]   --> src/jupyter_message.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 17 | use json::{self};
[INFO] [stdout]    |            ^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/main.rs:14:1
[INFO] [stdout]    |
[INFO] [stdout] 14 | extern crate json;
[INFO] [stdout]    | ------------------ the item `json` is already imported here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `std` is imported redundantly
[INFO] [stdout]   --> src/jupyter_message.rs:19:11
[INFO] [stdout]    |
[INFO] [stdout] 19 | use std::{self};
[INFO] [stdout]    |           ^^^^ the item `std` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `json` is imported redundantly
[INFO] [stdout]   --> src/jupyter_message.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 17 | use json::{self};
[INFO] [stdout]    |            ^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/main.rs:14:1
[INFO] [stdout]    |
[INFO] [stdout] 14 | extern crate json;
[INFO] [stdout]    | ------------------ the item `json` is already imported here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `std` is imported redundantly
[INFO] [stdout]   --> src/jupyter_message.rs:19:11
[INFO] [stdout]    |
[INFO] [stdout] 19 | use std::{self};
[INFO] [stdout]    |           ^^^^ the item `std` is already defined by prelude
[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 45.61s
[INFO] running `Command { std: "docker" "inspect" "a74a7ce552f27c5ebf847d423af818a02eaf2b324f196a5d93c90d9eab12c996", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a74a7ce552f27c5ebf847d423af818a02eaf2b324f196a5d93c90d9eab12c996", kill_on_drop: false }`
[INFO] [stdout] a74a7ce552f27c5ebf847d423af818a02eaf2b324f196a5d93c90d9eab12c996