[INFO] cloning repository https://github.com/ChainSafe/rust-bls-derivation
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ChainSafe/rust-bls-derivation" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FChainSafe%2Frust-bls-derivation", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FChainSafe%2Frust-bls-derivation'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9d956de1136034bb5c0252aefb23acc3232258d0
[INFO] checking ChainSafe/rust-bls-derivation against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FChainSafe%2Frust-bls-derivation" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ChainSafe/rust-bls-derivation on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ChainSafe/rust-bls-derivation
[INFO] finished tweaking git repo https://github.com/ChainSafe/rust-bls-derivation
[INFO] tweaked toml for git repo https://github.com/ChainSafe/rust-bls-derivation written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 21 packages
[INFO] [stderr]       Adding hex v0.3.2 (latest: v0.4.3)
[INFO] [stderr]       Adding num-bigint v0.2.6 (latest: v0.4.4)
[INFO] [stderr]       Adding rand v0.3.23 (latest: v0.8.5)
[INFO] [stderr]       Adding rand v0.4.6 (latest: v0.8.5)
[INFO] [stderr]       Adding rand_core v0.3.1 (latest: v0.6.4)
[INFO] [stderr]       Adding rand_core v0.4.2 (latest: v0.6.4)
[INFO] [stderr]       Adding rdrand v0.4.0 (latest: v0.8.3)
[INFO] [stderr]       Adding time v0.1.45 (latest: v0.3.34)
[INFO] [stderr]       Adding wasi v0.10.0+wasi-snapshot-preview1 (latest: v0.13.0+wasi-0.2.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 178c5e2d5707254958c66c8065ede8f7668888add8ad197923469d3f6cb0d91b
[INFO] running `Command { std: "docker" "start" "-a" "178c5e2d5707254958c66c8065ede8f7668888add8ad197923469d3f6cb0d91b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "178c5e2d5707254958c66c8065ede8f7668888add8ad197923469d3f6cb0d91b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "178c5e2d5707254958c66c8065ede8f7668888add8ad197923469d3f6cb0d91b", kill_on_drop: false }`
[INFO] [stdout] 178c5e2d5707254958c66c8065ede8f7668888add8ad197923469d3f6cb0d91b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6dc181fa80a8cfe4133ca3b9f95932d92935536167c7f3a85c0d410fd3230609
[INFO] running `Command { std: "docker" "start" "-a" "6dc181fa80a8cfe4133ca3b9f95932d92935536167c7f3a85c0d410fd3230609", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]    Compiling gcc v0.3.55
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]     Checking rustc-serialize v0.3.25
[INFO] [stderr]     Checking hex v0.3.2
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]    Compiling rust-crypto v0.2.36
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking num-integer v0.1.46
[INFO] [stderr]     Checking bls_key_derivation v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `BigUint` is imported redundantly
[INFO] [stdout]    --> src/key_derivation.rs:111:9
[INFO] [stdout]     |
[INFO] [stdout] 111 |     use super::bigint::BigUint;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 112 |     use super::*;
[INFO] [stdout]     |         -------- the item `BigUint` is already imported here
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `hex` is imported redundantly
[INFO] [stdout]    --> src/key_derivation.rs:113:9
[INFO] [stdout]     |
[INFO] [stdout] 113 |     use hex;
[INFO] [stdout]     |         ^^^ the item `hex` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `FromPrimitive` is imported redundantly
[INFO] [stdout]    --> src/key_derivation.rs:114:22
[INFO] [stdout]     |
[INFO] [stdout] 112 |     use super::*;
[INFO] [stdout]     |         -------- the item `FromPrimitive` is already imported here
[INFO] [stdout] 113 |     use hex;
[INFO] [stdout] 114 |     use num_traits::{FromPrimitive, Num};
[INFO] [stdout]     |                      ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Num` is imported redundantly
[INFO] [stdout]    --> src/key_derivation.rs:114:37
[INFO] [stdout]     |
[INFO] [stdout] 112 |     use super::*;
[INFO] [stdout]     |         -------- the item `Num` is already imported here
[INFO] [stdout] 113 |     use hex;
[INFO] [stdout] 114 |     use num_traits::{FromPrimitive, Num};
[INFO] [stdout]     |                                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.31s
[INFO] running `Command { std: "docker" "inspect" "6dc181fa80a8cfe4133ca3b9f95932d92935536167c7f3a85c0d410fd3230609", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6dc181fa80a8cfe4133ca3b9f95932d92935536167c7f3a85c0d410fd3230609", kill_on_drop: false }`
[INFO] [stdout] 6dc181fa80a8cfe4133ca3b9f95932d92935536167c7f3a85c0d410fd3230609