[INFO] cloning repository https://github.com/davidbarsky/stuff
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/davidbarsky/stuff" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdavidbarsky%2Fstuff", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdavidbarsky%2Fstuff'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7cf9aa9684da4e3fffc7cdb5556bb65fb7d29af5
[INFO] checking davidbarsky/stuff against try#3e22d1f9053c0fc87629b3c6d5d9567856368e5d for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdavidbarsky%2Fstuff" "/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/davidbarsky/stuff on toolchain 3e22d1f9053c0fc87629b3c6d5d9567856368e5d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/davidbarsky/stuff
[INFO] finished tweaking git repo https://github.com/davidbarsky/stuff
[INFO] tweaked toml for git repo https://github.com/davidbarsky/stuff written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/davidbarsky/stuff already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tracing-futures v0.2.3
[INFO] [stderr]   Downloaded tower-limit v0.3.0
[INFO] [stderr]   Downloaded sharded-slab v0.0.8
[INFO] [stderr]   Downloaded tracing-serde v0.1.1
[INFO] [stderr]   Downloaded tower-util v0.3.0
[INFO] [stderr]   Downloaded tracing-subscriber v0.2.2
[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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 489d2047b29f3eda40365c3b95a7d5ecc9407adeabfd5702b39c2d6509fe06d1
[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" "489d2047b29f3eda40365c3b95a7d5ecc9407adeabfd5702b39c2d6509fe06d1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "489d2047b29f3eda40365c3b95a7d5ecc9407adeabfd5702b39c2d6509fe06d1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "489d2047b29f3eda40365c3b95a7d5ecc9407adeabfd5702b39c2d6509fe06d1", kill_on_drop: false }`
[INFO] [stdout] 489d2047b29f3eda40365c3b95a7d5ecc9407adeabfd5702b39c2d6509fe06d1
[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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", 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] b61162138be72b2d178360893e855dec9490800a72f9253cb9ee875e3568ea4c
[INFO] running `Command { std: "docker" "start" "-a" "b61162138be72b2d178360893e855dec9490800a72f9253cb9ee875e3568ea4c", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.16
[INFO] [stderr]     Checking futures-core v0.3.4
[INFO] [stderr]     Checking tower-layer v0.3.0
[INFO] [stderr]     Checking futures-task v0.3.4
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]     Checking regex-syntax v0.6.16
[INFO] [stderr]     Checking futures-sink v0.3.4
[INFO] [stderr]     Checking utf8-ranges v1.0.4
[INFO] [stderr]    Compiling anyhow v1.0.26
[INFO] [stderr]     Checking tracing-core v0.1.10
[INFO] [stderr]     Checking sharded-slab v0.0.8
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking signal-hook-registry v1.2.0
[INFO] [stderr]     Checking aho-corasick v0.7.9
[INFO] [stderr]     Checking serde_json v1.0.48
[INFO] [stderr]     Checking chrono v0.4.10
[INFO] [stderr]     Checking futures-util v0.3.4
[INFO] [stderr]     Checking futures-channel v0.3.4
[INFO] [stderr]     Checking mio v0.6.21
[INFO] [stderr]     Checking tracing-log v0.1.1
[INFO] [stderr]     Checking tracing-serde v0.1.1
[INFO] [stderr]     Checking mio-uds v0.6.7
[INFO] [stderr]     Checking regex-automata v0.1.8
[INFO] [stderr]     Checking regex v1.3.4
[INFO] [stderr]     Checking matchers v0.0.1
[INFO] [stderr]     Checking tracing-subscriber v0.2.2
[INFO] [stderr]    Compiling pin-project-internal v0.4.8
[INFO] [stderr]    Compiling tokio-macros v0.2.5
[INFO] [stderr]    Compiling tracing-attributes v0.1.7
[INFO] [stderr]     Checking tokio v0.2.13
[INFO] [stderr]     Checking tracing v0.1.13
[INFO] [stderr]     Checking pin-project v0.4.8
[INFO] [stderr]     Checking tower-util v0.3.0
[INFO] [stderr]     Checking tower-discover v0.3.0
[INFO] [stderr]     Checking tower-load-shed v0.3.0
[INFO] [stderr]     Checking tracing-futures v0.2.3
[INFO] [stderr]     Checking tokio-util v0.2.0
[INFO] [stderr]     Checking tower-timeout v0.3.0
[INFO] [stderr]     Checking tower-retry v0.3.0
[INFO] [stderr]     Checking tower-limit v0.3.0
[INFO] [stderr]     Checking tower-buffer v0.3.0
[INFO] [stderr]     Checking tower v0.3.1
[INFO] [stderr]     Checking h2 v0.2.2
[INFO] [stderr]     Checking hyper v0.13.3
[INFO] [stderr]     Checking stuff v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `SimStream`, `SimulatedConnector`
[INFO] [stdout]   --> src/main.rs:79:28
[INFO] [stdout]    |
[INFO] [stdout] 79 |         sim_stream::{chan, SimStream, SimulatedConnector},
[INFO] [stdout]    |                            ^^^^^^^^^  ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `chan`
[INFO] [stdout]   --> src/sim_stream.rs:19:15
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub(crate) fn chan() -> (SimStream, SimStream) {
[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: `new`
[INFO] [stdout]    --> src/sim_stream.rs:120:8
[INFO] [stdout]     |
[INFO] [stdout] 120 |     fn new() -> Self {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 48.31s
[INFO] running `Command { std: "docker" "inspect" "b61162138be72b2d178360893e855dec9490800a72f9253cb9ee875e3568ea4c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b61162138be72b2d178360893e855dec9490800a72f9253cb9ee875e3568ea4c", kill_on_drop: false }`
[INFO] [stdout] b61162138be72b2d178360893e855dec9490800a72f9253cb9ee875e3568ea4c