[INFO] crate fil-sapling-crypto 0.1.1 is already in cache
[INFO] checking fil-sapling-crypto-0.1.1 against master#4ff32c07da9d97e6dc315a4a5c9ffbb797cb27bb for pr-64672
[INFO] extracting crate fil-sapling-crypto 0.1.1 into work/builds/worker-4/source
[INFO] validating manifest of crates.io crate fil-sapling-crypto 0.1.1 on toolchain 4ff32c07da9d97e6dc315a4a5c9ffbb797cb27bb
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+4ff32c07da9d97e6dc315a4a5c9ffbb797cb27bb" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate fil-sapling-crypto 0.1.1
[INFO] finished tweaking crates.io crate fil-sapling-crypto 0.1.1
[INFO] tweaked toml for crates.io crate fil-sapling-crypto 0.1.1 written to work/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate fil-sapling-crypto 0.1.1 already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+4ff32c07da9d97e6dc315a4a5c9ffbb797cb27bb" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/mnt/big/crater/work/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/mnt/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+4ff32c07da9d97e6dc315a4a5c9ffbb797cb27bb" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 377baff8c77cfb7ba6ac2100f5cac68e69f8cf3b6033fb21a53cb29eb54166a6
[INFO] running `"docker" "start" "-a" "377baff8c77cfb7ba6ac2100f5cac68e69f8cf3b6033fb21a53cb29eb54166a6"`
[INFO] [stderr]    Compiling arrayvec v0.4.11
[INFO] [stderr]    Compiling num-bigint v0.2.2
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]    Compiling proc-macro-hack v0.5.8
[INFO] [stderr]     Checking digest v0.8.1
[INFO] [stderr]     Checking rust-crypto v0.2.36
[INFO] [stderr]     Checking crossbeam-epoch v0.7.2
[INFO] [stderr]     Checking blake2b_simd v0.4.1
[INFO] [stderr]     Checking blake2s_simd v0.5.5
[INFO] [stderr]     Checking blake2b_simd v0.5.5
[INFO] [stderr]    Compiling hex-literal-impl v0.2.0
[INFO] [stderr]     Checking crossbeam-deque v0.7.1
[INFO] [stderr]     Checking crossbeam v0.7.2
[INFO] [stderr]     Checking hex-literal v0.2.0
[INFO] [stderr]    Compiling ff_derive v0.3.0
[INFO] [stderr]     Checking ff v0.4.0
[INFO] [stderr]     Checking paired v0.15.0
[INFO] [stderr]     Checking bellperson v0.2.0
[INFO] [stderr]     Checking fil-sapling-crypto v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/circuit/pedersen_hash.rs:214:21
[INFO] [stderr]     |
[INFO] [stderr] 214 |                 let mut input: Vec<bool> = (0..length).map(|_| rng.gen()).collect();
[INFO] [stderr]     |                     ----^^^^^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 35.40s
[INFO] running `"docker" "inspect" "377baff8c77cfb7ba6ac2100f5cac68e69f8cf3b6033fb21a53cb29eb54166a6"`
[INFO] running `"docker" "rm" "-f" "377baff8c77cfb7ba6ac2100f5cac68e69f8cf3b6033fb21a53cb29eb54166a6"`
[INFO] [stdout] 377baff8c77cfb7ba6ac2100f5cac68e69f8cf3b6033fb21a53cb29eb54166a6