[INFO] fetching crate jagged_array 0.2.4...
[INFO] checking jagged_array-0.2.4 against master#119d2a1a98fe87d4ae6cabf12134a0ef2fb95851 for pr-75180
[INFO] extracting crate jagged_array 0.2.4 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate jagged_array 0.2.4 on toolchain 119d2a1a98fe87d4ae6cabf12134a0ef2fb95851
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+119d2a1a98fe87d4ae6cabf12134a0ef2fb95851" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate jagged_array 0.2.4
[INFO] finished tweaking crates.io crate jagged_array 0.2.4
[INFO] tweaked toml for crates.io crate jagged_array 0.2.4 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+119d2a1a98fe87d4ae6cabf12134a0ef2fb95851" "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" "+119d2a1a98fe87d4ae6cabf12134a0ef2fb95851" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+119d2a1a98fe87d4ae6cabf12134a0ef2fb95851" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2eb40f4b7da91ac0be8afa23e025fe58fb47f5de5a61f95993e0e382d24ef1f9
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "2eb40f4b7da91ac0be8afa23e025fe58fb47f5de5a61f95993e0e382d24ef1f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2eb40f4b7da91ac0be8afa23e025fe58fb47f5de5a61f95993e0e382d24ef1f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2eb40f4b7da91ac0be8afa23e025fe58fb47f5de5a61f95993e0e382d24ef1f9", kill_on_drop: false }`
[INFO] [stdout] 2eb40f4b7da91ac0be8afa23e025fe58fb47f5de5a61f95993e0e382d24ef1f9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+119d2a1a98fe87d4ae6cabf12134a0ef2fb95851" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] dcfadcd18826d925f2d550015284a670f0c2db73ebf2f4974e75ba57e8864e7a
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "dcfadcd18826d925f2d550015284a670f0c2db73ebf2f4974e75ba57e8864e7a", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.115
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling serde_json v1.0.57
[INFO] [stderr]     Checking try_opt v0.1.1
[INFO] [stderr]     Checking streaming-iterator v0.1.5
[INFO] [stderr]     Checking itoa v0.4.6
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking jagged_array v0.2.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::iter::FromIterator`
[INFO] [stdout]  --> benches/jagged2.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::iter::FromIterator;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `XorShiftRng`
[INFO] [stdout]   --> benches/jagged2.rs:10:17
[INFO] [stdout]    |
[INFO] [stdout] 10 | use rand::{Rng, XorShiftRng};
[INFO] [stdout]    |                 ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> benches/jagged2.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |         (0..(4*i % 300))
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 13.38s
[INFO] running `Command { std: "docker" "inspect" "dcfadcd18826d925f2d550015284a670f0c2db73ebf2f4974e75ba57e8864e7a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dcfadcd18826d925f2d550015284a670f0c2db73ebf2f4974e75ba57e8864e7a", kill_on_drop: false }`
[INFO] [stdout] dcfadcd18826d925f2d550015284a670f0c2db73ebf2f4974e75ba57e8864e7a