[INFO] fetching crate arc_ast 0.4.2...
[INFO] checking arc_ast-0.4.2 against try#07fecb9cf34c4979a772ba38c99d6d9144768413 for pr-87710
[INFO] extracting crate arc_ast 0.4.2 into /workspace/builds/worker-82/source
[INFO] validating manifest of crates.io crate arc_ast 0.4.2 on toolchain 07fecb9cf34c4979a772ba38c99d6d9144768413
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+07fecb9cf34c4979a772ba38c99d6d9144768413" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate arc_ast 0.4.2
[INFO] finished tweaking crates.io crate arc_ast 0.4.2
[INFO] tweaked toml for crates.io crate arc_ast 0.4.2 written to /workspace/builds/worker-82/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+07fecb9cf34c4979a772ba38c99d6d9144768413" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+07fecb9cf34c4979a772ba38c99d6d9144768413" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-82/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-82/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+07fecb9cf34c4979a772ba38c99d6d9144768413" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 553831ebbdb038b4f6f0bcd4c46a0c1c83ec2c783c21f233928308c7fbd7a745
[INFO] running `Command { std: "docker" "start" "-a" "553831ebbdb038b4f6f0bcd4c46a0c1c83ec2c783c21f233928308c7fbd7a745", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "553831ebbdb038b4f6f0bcd4c46a0c1c83ec2c783c21f233928308c7fbd7a745", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "553831ebbdb038b4f6f0bcd4c46a0c1c83ec2c783c21f233928308c7fbd7a745", kill_on_drop: false }`
[INFO] [stdout] 553831ebbdb038b4f6f0bcd4c46a0c1c83ec2c783c21f233928308c7fbd7a745
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-82/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-82/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+07fecb9cf34c4979a772ba38c99d6d9144768413" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9196bfb7872938f40dd0127f5cd82804006f2548eb7f44cd935f056645d5a488
[INFO] running `Command { std: "docker" "start" "-a" "9196bfb7872938f40dd0127f5cd82804006f2548eb7f44cd935f056645d5a488", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling serde_json v1.0.66
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]     Checking yaml-rust v0.4.5
[INFO] [stderr]     Checking serde v1.0.129
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-bigint v0.3.2
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling num-rational v0.3.2
[INFO] [stderr]     Checking num-complex v0.3.1
[INFO] [stderr]     Checking bigdecimal v0.2.0
[INFO] [stderr]     Checking num v0.3.1
[INFO] [stderr]     Checking toml v0.5.8
[INFO] [stderr]     Checking arc_ast v0.4.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `crate::utils::parse_format`
[INFO] [stdout]  --> src/ast/statements/mod.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::utils::parse_format;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::utils::parse_format`
[INFO] [stdout]  --> src/ast/statements/mod.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::utils::parse_format;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 11.91s
[INFO] running `Command { std: "docker" "inspect" "9196bfb7872938f40dd0127f5cd82804006f2548eb7f44cd935f056645d5a488", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9196bfb7872938f40dd0127f5cd82804006f2548eb7f44cd935f056645d5a488", kill_on_drop: false }`
[INFO] [stdout] 9196bfb7872938f40dd0127f5cd82804006f2548eb7f44cd935f056645d5a488