[INFO] cloning repository https://github.com/provotum/crypto-rs
[INFO] running `Command { std: "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", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fprovotum%2Fcrypto-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3f284c3e6f3e3412a44d3cea11cd6487862c0d9f
[INFO] checking provotum/crypto-rs against beta for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fprovotum%2Fcrypto-rs" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/provotum/crypto-rs on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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-4/source/Cargo.toml
[INFO] crate git repo https://github.com/provotum/crypto-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 7c5a4bab756bdc1a544d8801a2c6e70cccdc31a2f803c737f47ddd2cce768294
[INFO] running `Command { std: "docker" "start" "-a" "7c5a4bab756bdc1a544d8801a2c6e70cccdc31a2f803c737f47ddd2cce768294", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7c5a4bab756bdc1a544d8801a2c6e70cccdc31a2f803c737f47ddd2cce768294", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7c5a4bab756bdc1a544d8801a2c6e70cccdc31a2f803c737f47ddd2cce768294", kill_on_drop: false }`
[INFO] [stdout] 7c5a4bab756bdc1a544d8801a2c6e70cccdc31a2f803c737f47ddd2cce768294
[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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 33a3c8895169ddb203892dcd49d971c1d34f5b6a5db06b067b3cdadfc5776bc4
[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" "33a3c8895169ddb203892dcd49d971c1d34f5b6a5db06b067b3cdadfc5776bc4", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.5
[INFO] [stderr]    Compiling serde v1.0.79
[INFO] [stderr]    Compiling num-integer v0.1.39
[INFO] [stderr]     Checking rand_core v0.2.1
[INFO] [stderr]    Compiling typenum v1.10.0
[INFO] [stderr]    Compiling proc-macro2 v0.4.19
[INFO] [stderr]     Checking libc v0.2.42
[INFO] [stderr]    Compiling num-bigint v0.2.0
[INFO] [stderr]    Compiling num-iter v0.1.37
[INFO] [stderr]    Compiling num-rational v0.2.1
[INFO] [stderr]    Compiling ryu v0.2.6
[INFO] [stderr]    Compiling num-complex v0.2.0
[INFO] [stderr]     Checking byte-tools v0.2.0
[INFO] [stderr]     Checking arrayref v0.3.5
[INFO] [stderr]     Checking fake-simd v0.1.2
[INFO] [stderr]     Checking itoa v0.4.3
[INFO] [stderr]     Checking block-buffer v0.3.3
[INFO] [stderr]     Checking rand v0.5.5
[INFO] [stderr]    Compiling quote v0.6.8
[INFO] [stderr]    Compiling syn v0.15.6
[INFO] [stderr]     Checking generic-array v0.9.0
[INFO] [stderr]     Checking digest v0.7.5
[INFO] [stderr]     Checking sha2 v0.7.1
[INFO] [stderr]    Compiling serde_derive v1.0.79
[INFO] [stderr]     Checking serde_json v1.0.31
[INFO] [stderr]     Checking num v0.2.0
[INFO] [stderr]     Checking crypto-rs v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/el_gamal/membership_proof.rs:55:17
[INFO] [stdout]    |
[INFO] [stdout] 55 |             let mut y: ModInt;
[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] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/el_gamal/membership_proof.rs:56:17
[INFO] [stdout]    |
[INFO] [stdout] 56 |             let mut z: ModInt;
[INFO] [stdout]    |                 ----^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/el_gamal/membership_proof.rs:55:17
[INFO] [stdout]    |
[INFO] [stdout] 55 |             let mut y: ModInt;
[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] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/el_gamal/membership_proof.rs:56:17
[INFO] [stdout]    |
[INFO] [stdout] 56 |             let mut z: ModInt;
[INFO] [stdout]    |                 ----^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused arithmetic operation that must be used
[INFO] [stdout]    --> src/arithmetic/mod_int.rs:610:9
[INFO] [stdout]     |
[INFO] [stdout] 610 |         one / zero;
[INFO] [stdout]     |         ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused arithmetic operation that must be used
[INFO] [stdout]    --> src/arithmetic/mod_int.rs:625:9
[INFO] [stdout]     |
[INFO] [stdout] 625 |         one / zero;
[INFO] [stdout]     |         ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 44.44s
[INFO] running `Command { std: "docker" "inspect" "33a3c8895169ddb203892dcd49d971c1d34f5b6a5db06b067b3cdadfc5776bc4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "33a3c8895169ddb203892dcd49d971c1d34f5b6a5db06b067b3cdadfc5776bc4", kill_on_drop: false }`
[INFO] [stdout] 33a3c8895169ddb203892dcd49d971c1d34f5b6a5db06b067b3cdadfc5776bc4