[INFO] cloning repository https://github.com/Manta-Network/manta-errors
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Manta-Network/manta-errors" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FManta-Network%2Fmanta-errors", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FManta-Network%2Fmanta-errors'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 201b4e70577fa282474ceee2008e4e24ba790e21
[INFO] checking Manta-Network/manta-errors against try#ddfd70ee3c3748e597b32f416b0d15a4f6e37685 for pr-87050
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FManta-Network%2Fmanta-errors" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Manta-Network/manta-errors on toolchain ddfd70ee3c3748e597b32f416b0d15a4f6e37685
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Manta-Network/manta-errors
[INFO] finished tweaking git repo https://github.com/Manta-Network/manta-errors
[INFO] tweaked toml for git repo https://github.com/Manta-Network/manta-errors written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/Manta-Network/manta-errors already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ark-ff-macros v0.2.0
[INFO] [stderr]   Downloaded ark-relations v0.2.0
[INFO] [stderr]   Downloaded ark-ec v0.2.0
[INFO] [stderr]   Downloaded ark-snark v0.2.0
[INFO] [stderr]   Downloaded ark-crypto-primitives v0.2.0
[INFO] [stderr]   Downloaded ark-ff v0.2.0
[INFO] [stderr]   Downloaded ark-r1cs-std v0.2.0
[INFO] [stderr]   Downloaded ark-serialize-derive v0.2.0
[INFO] [stderr]   Downloaded ark-ff-asm v0.2.0
[INFO] [stderr]   Downloaded ark-nonnative-field v0.2.0
[INFO] [stderr]   Downloaded ark-serialize v0.2.0
[INFO] [stderr]   Downloaded displaydoc v0.2.1
[INFO] [stderr]   Downloaded ark-std v0.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ad5c478fc3c1ccf54ca9352f60788bb57703c0460c72a669102925e472a32241
[INFO] running `Command { std: "docker" "start" "-a" "ad5c478fc3c1ccf54ca9352f60788bb57703c0460c72a669102925e472a32241", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ad5c478fc3c1ccf54ca9352f60788bb57703c0460c72a669102925e472a32241", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ad5c478fc3c1ccf54ca9352f60788bb57703c0460c72a669102925e472a32241", kill_on_drop: false }`
[INFO] [stdout] ad5c478fc3c1ccf54ca9352f60788bb57703c0460c72a669102925e472a32241
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c5b1dd7ca1c2c429670277f3df374cd024494463ae90d81989dbe779b3e33583
[INFO] running `Command { std: "docker" "start" "-a" "c5b1dd7ca1c2c429670277f3df374cd024494463ae90d81989dbe779b3e33583", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.27
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.72
[INFO] [stderr]    Compiling ucd-trie v0.1.3
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]     Checking tracing-core v0.1.18
[INFO] [stderr]     Checking subtle v2.4.0
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-bigint v0.4.0
[INFO] [stderr]    Compiling pest v2.1.3
[INFO] [stderr]    Compiling generic-array v0.14.4
[INFO] [stderr]     Checking rand_xorshift v0.2.0
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking digest v0.9.0
[INFO] [stderr]     Checking crypto-mac v0.8.0
[INFO] [stderr]     Checking blake2 v0.9.1
[INFO] [stderr]     Checking ark-std v0.2.0
[INFO] [stderr]    Compiling semver-parser v0.10.2
[INFO] [stderr]    Compiling semver v0.11.0
[INFO] [stderr]    Compiling rustc_version v0.3.3
[INFO] [stderr]    Compiling ark-ff v0.2.0
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]    Compiling ark-serialize-derive v0.2.0
[INFO] [stderr]    Compiling zeroize_derive v1.1.0
[INFO] [stderr]    Compiling ark-ff-asm v0.2.0
[INFO] [stderr]    Compiling derivative v2.2.0
[INFO] [stderr]    Compiling ark-ff-macros v0.2.0
[INFO] [stderr]    Compiling tracing-attributes v0.1.15
[INFO] [stderr]    Compiling displaydoc v0.2.1
[INFO] [stderr]     Checking ark-serialize v0.2.0
[INFO] [stderr]     Checking zeroize v1.3.0
[INFO] [stderr]     Checking tracing v0.1.26
[INFO] [stderr]     Checking ark-relations v0.2.0
[INFO] [stderr]     Checking ark-ec v0.2.0
[INFO] [stderr]     Checking ark-snark v0.2.0
[INFO] [stderr]     Checking ark-r1cs-std v0.2.0
[INFO] [stderr]     Checking ark-nonnative-field v0.2.0
[INFO] [stderr]     Checking ark-crypto-primitives v0.2.0
[INFO] [stderr]     Checking manta-error v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `ErrorKind`
[INFO] [stdout]   --> src/lib.rs:21:37
[INFO] [stdout]    |
[INFO] [stdout] 21 | use ark_std::io::{Error as IoError, ErrorKind};
[INFO] [stdout]    |                                     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 56.17s
[INFO] running `Command { std: "docker" "inspect" "c5b1dd7ca1c2c429670277f3df374cd024494463ae90d81989dbe779b3e33583", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c5b1dd7ca1c2c429670277f3df374cd024494463ae90d81989dbe779b3e33583", kill_on_drop: false }`
[INFO] [stdout] c5b1dd7ca1c2c429670277f3df374cd024494463ae90d81989dbe779b3e33583