[INFO] cloning repository https://github.com/provotum/crypto-rs
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/provotum/crypto-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fprovotum%2Fcrypto-rs"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fprovotum%2Fcrypto-rs'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 3f284c3e6f3e3412a44d3cea11cd6487862c0d9f
[INFO] checking provotum/crypto-rs against master#2748a9fd93dd1a00a4521f4f16de5befbf77f6cd for pr-62262-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fprovotum%2Fcrypto-rs" "/workspace/builds/worker-8/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/provotum/crypto-rs on toolchain 2748a9fd93dd1a00a4521f4f16de5befbf77f6cd
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/provotum/crypto-rs
[INFO] finished tweaking git repo https://github.com/provotum/crypto-rs
[INFO] tweaked toml for git repo https://github.com/provotum/crypto-rs written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/provotum/crypto-rs already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "MAP_USER_ID=0" "-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" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] a32a3c33b8c6ca59355c8fc459d35d67b8727921725ef0e60a1f75c93916cb90
[INFO] running `"docker" "start" "-a" "a32a3c33b8c6ca59355c8fc459d35d67b8727921725ef0e60a1f75c93916cb90"`
[INFO] [stderr]    Compiling num-traits v0.2.5
[INFO] [stderr]    Compiling num-bigint v0.2.0
[INFO] [stderr]    Compiling num-complex v0.2.0
[INFO] [stderr]    Compiling num-rational v0.2.1
[INFO] [stderr]     Checking rand v0.5.5
[INFO] [stderr]    Compiling proc-macro2 v0.4.19
[INFO] [stderr]    Compiling quote v0.6.8
[INFO] [stderr]    Compiling syn v0.15.6
[INFO] [stderr]     Checking num-integer v0.1.39
[INFO] [stderr]     Checking num-iter v0.1.37
[INFO] [stderr]     Checking num v0.2.0
[INFO] [stderr]    Compiling serde_derive v1.0.79
[INFO] [stderr]     Checking crypto-rs v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/el_gamal/membership_proof.rs:55:17
[INFO] [stderr]    |
[INFO] [stderr] 55 |             let mut y: ModInt;
[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] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/el_gamal/membership_proof.rs:56:17
[INFO] [stderr]    |
[INFO] [stderr] 56 |             let mut z: ModInt;
[INFO] [stderr]    |                 ----^
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/el_gamal/membership_proof.rs:55:17
[INFO] [stderr]    |
[INFO] [stderr] 55 |             let mut y: ModInt;
[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] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/el_gamal/membership_proof.rs:56:17
[INFO] [stderr]    |
[INFO] [stderr] 56 |             let mut z: ModInt;
[INFO] [stderr]    |                 ----^
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused arithmetic operation that must be used
[INFO] [stderr]    --> src/arithmetic/mod_int.rs:610:9
[INFO] [stderr]     |
[INFO] [stderr] 610 |         one / zero;
[INFO] [stderr]     |         ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused arithmetic operation that must be used
[INFO] [stderr]    --> src/arithmetic/mod_int.rs:625:9
[INFO] [stderr]     |
[INFO] [stderr] 625 |         one / zero;
[INFO] [stderr]     |         ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 35.42s
[INFO] running `"docker" "inspect" "a32a3c33b8c6ca59355c8fc459d35d67b8727921725ef0e60a1f75c93916cb90"`
[INFO] running `"docker" "rm" "-f" "a32a3c33b8c6ca59355c8fc459d35d67b8727921725ef0e60a1f75c93916cb90"`
[INFO] [stdout] a32a3c33b8c6ca59355c8fc459d35d67b8727921725ef0e60a1f75c93916cb90