[INFO] fetching crate zfec-rs 0.1.0...
[INFO] checking zfec-rs-0.1.0 against try#c659ee110de67e82444e4b6c8407c1a9af9c2cf6 for pr-145608-1
[INFO] extracting crate zfec-rs 0.1.0 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate zfec-rs 0.1.0
[INFO] finished tweaking crates.io crate zfec-rs 0.1.0
[INFO] tweaked toml for crates.io crate zfec-rs 0.1.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate zfec-rs 0.1.0 on toolchain c659ee110de67e82444e4b6c8407c1a9af9c2cf6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 14 packages to latest compatible versions
[INFO] [stderr]       Adding rand v0.8.5 (available: v0.9.2)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d1cc22f5f4fe03a6add387b69af139821c76181d34fd2ec4d0c58d32f9d860a5
[INFO] running `Command { std: "docker" "start" "-a" "d1cc22f5f4fe03a6add387b69af139821c76181d34fd2ec4d0c58d32f9d860a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d1cc22f5f4fe03a6add387b69af139821c76181d34fd2ec4d0c58d32f9d860a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d1cc22f5f4fe03a6add387b69af139821c76181d34fd2ec4d0c58d32f9d860a5", kill_on_drop: false }`
[INFO] [stdout] d1cc22f5f4fe03a6add387b69af139821c76181d34fd2ec4d0c58d32f9d860a5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b0e9ab1b246ffd572b869523f016600565f85fd2a30aef9d48d3555b71fcb8cb
[INFO] running `Command { std: "docker" "start" "-a" "b0e9ab1b246ffd572b869523f016600565f85fd2a30aef9d48d3555b71fcb8cb", kill_on_drop: false }`
[INFO] [stderr]     Checking zfec-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `thread_rng`
[INFO] [stdout]   --> src/tests.rs:18:12
[INFO] [stdout]    |
[INFO] [stdout] 18 | use rand::{thread_rng, Rng};
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `collections::BTreeMap`, `fs`, `io::prelude::*`, and `time`
[INFO] [stdout]   --> src/tests.rs:19:11
[INFO] [stdout]    |
[INFO] [stdout] 19 | use std::{collections::BTreeMap, fs, io::prelude::*, time};
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^^^^^^^  ^^  ^^^^^^^^^^^^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/tests.rs:54:9
[INFO] [stdout]    |
[INFO] [stdout] 54 |     let mut fec = Fec::new(k, m).unwrap();
[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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.41s
[INFO] running `Command { std: "docker" "inspect" "b0e9ab1b246ffd572b869523f016600565f85fd2a30aef9d48d3555b71fcb8cb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b0e9ab1b246ffd572b869523f016600565f85fd2a30aef9d48d3555b71fcb8cb", kill_on_drop: false }`
[INFO] [stdout] b0e9ab1b246ffd572b869523f016600565f85fd2a30aef9d48d3555b71fcb8cb