[INFO] cloning repository https://github.com/vorner/mix
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/vorner/mix" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvorner%2Fmix", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvorner%2Fmix'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f28bcd808dd0799a495a5b9cce7b3634721bea79
[INFO] checking vorner/mix against try#f47dd4da3ae8c32c9e65d307bfe640b143e674df for pr-77526
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvorner%2Fmix" "/workspace/builds/worker-11/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-11/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/vorner/mix on toolchain f47dd4da3ae8c32c9e65d307bfe640b143e674df
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/vorner/mix
[INFO] finished tweaking git repo https://github.com/vorner/mix
[INFO] tweaked toml for git repo https://github.com/vorner/mix written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate git repo https://github.com/vorner/mix already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded toml v0.4.7
[INFO] [stderr]   Downloaded rlua v0.15.2
[INFO] [stderr]   Downloaded nom v4.0.0
[INFO] [stderr]   Downloaded syn v0.15.6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 14b1967523c5f3673aa36e497e7b5c12a09eb8616109104d53b821ea6fae1279
[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" "14b1967523c5f3673aa36e497e7b5c12a09eb8616109104d53b821ea6fae1279", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "14b1967523c5f3673aa36e497e7b5c12a09eb8616109104d53b821ea6fae1279", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "14b1967523c5f3673aa36e497e7b5c12a09eb8616109104d53b821ea6fae1279", kill_on_drop: false }`
[INFO] [stdout] 14b1967523c5f3673aa36e497e7b5c12a09eb8616109104d53b821ea6fae1279
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] de5bd4f999c0757634c714c38365120db4629e3a7f4d0e9b1454b865ab57f36e
[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" "de5bd4f999c0757634c714c38365120db4629e3a7f4d0e9b1454b865ab57f36e", kill_on_drop: false }`
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[INFO] [stderr]     Checking scopeguard v0.3.3
[INFO] [stderr]     Checking futures v0.1.24
[INFO] [stderr]     Checking rand_core v0.2.1
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[INFO] [stderr]     Checking crossbeam-utils v0.5.0
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking byteorder v1.2.6
[INFO] [stderr]    Compiling serde v1.0.79
[INFO] [stderr]     Checking stable_deref_trait v1.1.1
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[INFO] [stderr]     Checking serde v0.8.23
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[INFO] [stderr]     Checking bytes v0.4.10
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]     Checking clap v2.32.0
[INFO] [stderr]     Checking aho-corasick v0.5.3
[INFO] [stderr]     Checking mio v0.6.16
[INFO] [stderr]    Compiling backtrace-sys v0.1.24
[INFO] [stderr]    Compiling miniz-sys v0.1.10
[INFO] [stderr]    Compiling context v2.1.0
[INFO] [stderr]    Compiling rlua v0.15.2
[INFO] [stderr]    Compiling quote v0.6.8
[INFO] [stderr]     Checking tokio-io v0.1.9
[INFO] [stderr]    Compiling parking_lot_core v0.3.1
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[INFO] [stderr]     Checking nom v4.0.0
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[INFO] [stderr]    Compiling syn v0.14.9
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[INFO] [stderr]     Checking thread_local v0.2.7
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[INFO] [stderr]     Checking backtrace v0.3.9
[INFO] [stderr]     Checking parking_lot v0.6.4
[INFO] [stderr]     Checking tokio-fs v0.1.3
[INFO] [stderr]     Checking tokio-reactor v0.1.6
[INFO] [stderr]     Checking once_cell v0.1.6
[INFO] [stderr]     Checking serde-hjson v0.8.1
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[INFO] [stderr]     Checking tokio-udp v0.1.2
[INFO] [stderr]     Checking tokio-tcp v0.1.2
[INFO] [stderr]     Checking tokio-uds v0.2.2
[INFO] [stderr]     Checking tokio v0.1.11
[INFO] [stderr]     Checking corona v0.4.0
[INFO] [stderr]     Checking serde_json v1.0.31
[INFO] [stderr]     Checking toml v0.4.7
[INFO] [stderr]    Compiling serde_derive v1.0.79
[INFO] [stderr]    Compiling synstructure v0.9.0
[INFO] [stderr]     Checking config v0.9.1
[INFO] [stderr]    Compiling structopt-derive v0.2.10
[INFO] [stderr]     Checking failure v0.1.2
[INFO] [stderr]     Checking structopt v0.2.10
[INFO] [stderr]     Checking mix v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/mailbox/task.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 |     pub fn new(inner: Arc<T>) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `into_inner`
[INFO] [stdout]   --> src/mailbox/task.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 15 |     pub fn into_inner(self) -> Arc<T> {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `perform`
[INFO] [stdout]   --> src/mailbox/task.rs:72:8
[INFO] [stdout]    |
[INFO] [stdout] 72 |     fn perform(self) {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `pop`
[INFO] [stdout]   --> src/mailbox/task.rs:91:8
[INFO] [stdout]    |
[INFO] [stdout] 91 |     fn pop(&mut self) -> Option<Task> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `turn`
[INFO] [stdout]    --> src/mailbox/task.rs:103:19
[INFO] [stdout]     |
[INFO] [stdout] 103 |     pub(super) fn turn(&mut self) -> bool {
[INFO] [stdout]     |                   ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `MailboxContent`
[INFO] [stdout]    --> src/mailbox.rs:151:5
[INFO] [stdout]     |
[INFO] [stdout] 151 |     MailboxContent(Arc<Mailbox>),
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/mailbox/task.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 |     pub fn new(inner: Arc<T>) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `into_inner`
[INFO] [stdout]   --> src/mailbox/task.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 15 |     pub fn into_inner(self) -> Arc<T> {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `perform`
[INFO] [stdout]   --> src/mailbox/task.rs:72:8
[INFO] [stdout]    |
[INFO] [stdout] 72 |     fn perform(self) {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `pop`
[INFO] [stdout]   --> src/mailbox/task.rs:91:8
[INFO] [stdout]    |
[INFO] [stdout] 91 |     fn pop(&mut self) -> Option<Task> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `turn`
[INFO] [stdout]    --> src/mailbox/task.rs:103:19
[INFO] [stdout]     |
[INFO] [stdout] 103 |     pub(super) fn turn(&mut self) -> bool {
[INFO] [stdout]     |                   ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `MailboxContent`
[INFO] [stdout]    --> src/mailbox.rs:151:5
[INFO] [stdout]     |
[INFO] [stdout] 151 |     MailboxContent(Arc<Mailbox>),
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2m 32s
[INFO] running `Command { std: "docker" "inspect" "de5bd4f999c0757634c714c38365120db4629e3a7f4d0e9b1454b865ab57f36e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "de5bd4f999c0757634c714c38365120db4629e3a7f4d0e9b1454b865ab57f36e", kill_on_drop: false }`
[INFO] [stdout] de5bd4f999c0757634c714c38365120db4629e3a7f4d0e9b1454b865ab57f36e