[INFO] updating cached repository https://github.com/Floppy/ruby-version-badger
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/mnt/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] adf7943d2fc2382ba04c7b07c4a48a6bbffe538a
[INFO] checking Floppy/ruby-version-badger against master#c9edc02e8320a9e5799d185910ece7d491f524e6 for pr-64398
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2FFloppy%2Fruby-version-badger" "work/builds/worker-6/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Floppy/ruby-version-badger on toolchain c9edc02e8320a9e5799d185910ece7d491f524e6-alt
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+c9edc02e8320a9e5799d185910ece7d491f524e6-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/Floppy/ruby-version-badger
[INFO] finished tweaking git repo https://github.com/Floppy/ruby-version-badger
[INFO] tweaked toml for git repo https://github.com/Floppy/ruby-version-badger written to work/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/Floppy/ruby-version-badger already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+c9edc02e8320a9e5799d185910ece7d491f524e6-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] warning: unused manifest key: package.target
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/mnt/big/crater/work/builds/worker-6/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" "+c9edc02e8320a9e5799d185910ece7d491f524e6-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 9ddfa6e3da68c3ac42b1b8f23a425ec5c41e34a1ebe40c7177c6abb3ecffaf3c
[INFO] running `"docker" "start" "-a" "9ddfa6e3da68c3ac42b1b8f23a425ec5c41e34a1ebe40c7177c6abb3ecffaf3c"`
[INFO] [stderr] warning: unused manifest key: package.target
[INFO] [stderr]    Compiling rand v0.4.2
[INFO] [stderr]    Compiling openssl-sys v0.9.27
[INFO] [stderr]     Checking iovec v0.1.2
[INFO] [stderr]     Checking num_cpus v1.8.0
[INFO] [stderr]     Checking memchr v0.1.11
[INFO] [stderr]     Checking net2 v0.2.32
[INFO] [stderr]     Checking encoding_rs v0.7.2
[INFO] [stderr]     Checking tokio-service v0.1.0
[INFO] [stderr]     Checking relay v0.1.1
[INFO] [stderr]     Checking base64 v0.6.0
[INFO] [stderr]     Checking serde_json v1.0.10
[INFO] [stderr]     Checking yaml-rust v0.4.3
[INFO] [stderr]     Checking log v0.4.8
[INFO] [stderr]     Checking rand v0.3.22
[INFO] [stderr]     Checking bytes v0.4.6
[INFO] [stderr]     Checking aho-corasick v0.5.3
[INFO] [stderr]     Checking futures-cpupool v0.1.8
[INFO] [stderr]     Checking uuid v0.5.1
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]     Checking crc v1.7.0
[INFO] [stderr]     Checking regex v0.2.6
[INFO] [stderr]     Checking thread-id v2.0.0
[INFO] [stderr]     Checking serde_urlencoded v0.5.1
[INFO] [stderr]     Checking tokio-io v0.1.5
[INFO] [stderr]     Checking libflate v0.1.14
[INFO] [stderr]     Checking mio v0.6.13
[INFO] [stderr]     Checking mime v0.2.6
[INFO] [stderr]     Checking thread_local v0.2.7
[INFO] [stderr]    Compiling openssl v0.9.24
[INFO] [stderr]    Compiling phf_generator v0.7.21
[INFO] [stderr]     Checking regex v0.1.80
[INFO] [stderr]     Checking hyper v0.10.13
[INFO] [stderr]    Compiling phf_codegen v0.7.21
[INFO] [stderr]    Compiling mime_guess v2.0.0-alpha.4
[INFO] [stderr]     Checking tokio-core v0.1.12
[INFO] [stderr]     Checking env_logger v0.3.5
[INFO] [stderr]     Checking tokio-proto v0.1.1
[INFO] [stderr]     Checking native-tls v0.1.5
[INFO] [stderr]     Checking iron v0.5.1
[INFO] [stderr]     Checking tokio-tls v0.1.4
[INFO] [stderr]     Checking mount v0.3.0
[INFO] [stderr]     Checking router v0.5.1
[INFO] [stderr]     Checking hyper v0.11.21
[INFO] [stderr]     Checking staticfile v0.5.0
[INFO] [stderr]     Checking hyper-tls v0.1.2
[INFO] [stderr]     Checking reqwest v0.8.5
[INFO] [stderr]     Checking ruby-version-badger v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr] warning: value assigned to `version` is never read
[INFO] [stderr]   --> src/ruby.rs:19:13
[INFO] [stderr]    |
[INFO] [stderr] 19 |     let mut version = "unknown".to_string();
[INFO] [stderr]    |             ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `version` is never read
[INFO] [stderr]   --> src/rust.rs:19:13
[INFO] [stderr]    |
[INFO] [stderr] 19 |     let mut version = "unknown".to_string();
[INFO] [stderr]    |             ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `version` is never read
[INFO] [stderr]   --> src/node.rs:18:13
[INFO] [stderr]    |
[INFO] [stderr] 18 |     let mut version = "unknown".to_string();
[INFO] [stderr]    |             ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 |     env_logger::init();
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `version` is never read
[INFO] [stderr]   --> src/ruby.rs:19:13
[INFO] [stderr]    |
[INFO] [stderr] 19 |     let mut version = "unknown".to_string();
[INFO] [stderr]    |             ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `version` is never read
[INFO] [stderr]   --> src/rust.rs:19:13
[INFO] [stderr]    |
[INFO] [stderr] 19 |     let mut version = "unknown".to_string();
[INFO] [stderr]    |             ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `version` is never read
[INFO] [stderr]   --> src/node.rs:18:13
[INFO] [stderr]    |
[INFO] [stderr] 18 |     let mut version = "unknown".to_string();
[INFO] [stderr]    |             ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `language`
[INFO] [stderr]   --> src/config.rs:11:1
[INFO] [stderr]    |
[INFO] [stderr] 11 | pub fn language(lang: String) -> Result<yaml::Yaml, Error> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 |     env_logger::init();
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 53.53s
[INFO] running `"docker" "inspect" "9ddfa6e3da68c3ac42b1b8f23a425ec5c41e34a1ebe40c7177c6abb3ecffaf3c"`
[INFO] running `"docker" "rm" "-f" "9ddfa6e3da68c3ac42b1b8f23a425ec5c41e34a1ebe40c7177c6abb3ecffaf3c"`
[INFO] [stdout] 9ddfa6e3da68c3ac42b1b8f23a425ec5c41e34a1ebe40c7177c6abb3ecffaf3c