[INFO] fetching crate loopers-engine 0.1.2...
[INFO] checking loopers-engine-0.1.2 against master#db1fb85cff63ad5fffe435e17128f99f9e1d970c for pr-89056
[INFO] extracting crate loopers-engine 0.1.2 into /workspace/builds/worker-41/source
[INFO] validating manifest of crates.io crate loopers-engine 0.1.2 on toolchain db1fb85cff63ad5fffe435e17128f99f9e1d970c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate loopers-engine 0.1.2
[INFO] finished tweaking crates.io crate loopers-engine 0.1.2
[INFO] tweaked toml for crates.io crate loopers-engine 0.1.2 written to /workspace/builds/worker-41/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-41/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-41/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2343738dac9dc308d22554e49dc0f48945c7aeb2de1dc2c6a859fdf1456ca935
[INFO] running `Command { std: "docker" "start" "-a" "2343738dac9dc308d22554e49dc0f48945c7aeb2de1dc2c6a859fdf1456ca935", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2343738dac9dc308d22554e49dc0f48945c7aeb2de1dc2c6a859fdf1456ca935", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2343738dac9dc308d22554e49dc0f48945c7aeb2de1dc2c6a859fdf1456ca935", kill_on_drop: false }`
[INFO] [stdout] 2343738dac9dc308d22554e49dc0f48945c7aeb2de1dc2c6a859fdf1456ca935
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-41/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-41/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3dc2961b944cecbe07b975a2948363e799a541b35406a68178cfd145541b778e
[INFO] running `Command { std: "docker" "start" "-a" "3dc2961b944cecbe07b975a2948363e799a541b35406a68178cfd145541b778e", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.76
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]     Checking itoa v0.4.8
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]     Checking remove_dir_all v0.5.3
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]    Compiling convert_case v0.4.0
[INFO] [stderr]     Checking plotters-backend v0.3.2
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]     Checking quick-error v1.2.3
[INFO] [stderr]     Checking arrayvec v0.5.2
[INFO] [stderr]     Checking fnv v1.0.7
[INFO] [stderr]     Checking half v1.7.1
[INFO] [stderr]     Checking bit-vec v0.6.3
[INFO] [stderr]     Checking hound v3.4.0
[INFO] [stderr]     Checking oorandom v11.1.3
[INFO] [stderr]     Checking futures v0.1.31
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]     Checking itertools v0.10.1
[INFO] [stderr]     Checking wait-timeout v0.2.0
[INFO] [stderr]     Checking dirs-sys v0.3.6
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking dirs v2.0.2
[INFO] [stderr]     Checking plotters-svg v0.3.1
[INFO] [stderr]     Checking walkdir v2.3.2
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking bit-set v0.5.2
[INFO] [stderr]     Checking criterion-plot v0.4.4
[INFO] [stderr]     Checking crossbeam-channel v0.4.4
[INFO] [stderr]     Checking crossbeam-queue v0.2.3
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking tempfile v3.2.0
[INFO] [stderr]     Checking fern v0.6.0
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking plotters v0.3.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand_xorshift v0.2.0
[INFO] [stderr]     Checking rusty-fork v0.3.0
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking proptest v0.10.1
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling derive_more v0.99.16
[INFO] [stderr]     Checking bstr v0.2.17
[INFO] [stderr]     Checking serde_json v1.0.68
[INFO] [stderr]     Checking serde_cbor v0.11.2
[INFO] [stderr]     Checking toml v0.5.8
[INFO] [stderr]     Checking csv v1.1.6
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking loopers-common v0.1.2
[INFO] [stderr]     Checking criterion v0.3.5
[INFO] [stderr]     Checking loopers-engine v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/lib.rs:494:10
[INFO] [stdout]     |
[INFO] [stdout] 494 |         };
[INFO] [stdout]     |          ^ help: remove this semicolon
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/lib.rs:494:10
[INFO] [stdout]     |
[INFO] [stdout] 494 |         };
[INFO] [stdout]     |          ^ help: remove this semicolon
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 36.97s
[INFO] running `Command { std: "docker" "inspect" "3dc2961b944cecbe07b975a2948363e799a541b35406a68178cfd145541b778e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3dc2961b944cecbe07b975a2948363e799a541b35406a68178cfd145541b778e", kill_on_drop: false }`
[INFO] [stdout] 3dc2961b944cecbe07b975a2948363e799a541b35406a68178cfd145541b778e