[INFO] cloning repository https://github.com/jaredly/unison.rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jaredly/unison.rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjaredly%2Funison.rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjaredly%2Funison.rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 78e660aae7f77b96e373efdd65f7d5d8da4822c3
[INFO] checking jaredly/unison.rs against try#6f8a6450478f69b8510c8976ab6c2a70b3b0e47c for pr-84920
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjaredly%2Funison.rs" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jaredly/unison.rs on toolchain 6f8a6450478f69b8510c8976ab6c2a70b3b0e47c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jaredly/unison.rs
[INFO] finished tweaking git repo https://github.com/jaredly/unison.rs
[INFO] tweaked toml for git repo https://github.com/jaredly/unison.rs written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/jaredly/unison.rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded pretty v0.10.0
[INFO] [stderr]   Downloaded rust-embed-impl v5.6.0
[INFO] [stderr]   Downloaded rust-embed-utils v5.0.0
[INFO] [stderr]   Downloaded sized-chunks v0.6.2
[INFO] [stderr]   Downloaded rust-embed v5.6.0
[INFO] [stderr]   Downloaded wasm-logger v0.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "metadata" "--no-deps" "--format-version=1", 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] 397b9570135433452e62d9586f369b96df24c33731f6d25259d8a20d9efa89f8
[INFO] running `Command { std: "docker" "start" "-a" "397b9570135433452e62d9586f369b96df24c33731f6d25259d8a20d9efa89f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "397b9570135433452e62d9586f369b96df24c33731f6d25259d8a20d9efa89f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "397b9570135433452e62d9586f369b96df24c33731f6d25259d8a20d9efa89f8", kill_on_drop: false }`
[INFO] [stdout] 397b9570135433452e62d9586f369b96df24c33731f6d25259d8a20d9efa89f8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "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] fea8b30fe77b07654e57f1d936a0192766c6b59faecbc43e7b739b9658d1fab3
[INFO] running `Command { std: "docker" "start" "-a" "fea8b30fe77b07654e57f1d936a0192766c6b59faecbc43e7b739b9658d1fab3", kill_on_drop: false }`
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[INFO] [stderr]    Compiling wasm-bindgen-shared v0.2.67
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[INFO] [stderr]     Checking once_cell v1.4.1
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[INFO] [stderr]     Checking ppv-lite86 v0.2.9
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[INFO] [stderr]    Compiling serde_derive v1.0.115
[INFO] [stderr]     Checking byte-tools v0.3.1
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[INFO] [stderr]    Compiling syn v1.0.39
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[INFO] [stderr]     Checking multipart v0.17.0
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[INFO] [stderr]     Checking serde_urlencoded v0.6.1
[INFO] [stderr]     Checking tokio-util v0.3.1
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.67
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.67
[INFO] [stderr]    Compiling pin-project-internal v0.4.23
[INFO] [stderr]    Compiling futures-macro v0.3.5
[INFO] [stderr]    Compiling rust-embed-impl v5.6.0
[INFO] [stderr]    Compiling wasm-bindgen-macro v0.2.67
[INFO] [stderr]     Checking rust-embed v5.6.0
[INFO] [stderr]     Checking pin-project v0.4.23
[INFO] [stderr]     Checking futures-util v0.3.5
[INFO] [stderr]     Checking tracing-futures v0.2.4
[INFO] [stderr]     Checking js-sys v0.3.44
[INFO] [stderr]     Checking console_error_panic_hook v0.1.6
[INFO] [stderr]     Checking shared v0.1.0 (/opt/rustwide/workdir/shared)
[INFO] [stderr]     Checking web-sys v0.3.44
[INFO] [stderr]     Checking futures-executor v0.3.5
[INFO] [stderr]     Checking h2 v0.2.6
[INFO] [stderr]     Checking tokio-tungstenite v0.11.0
[INFO] [stderr]     Checking wasm-logger v0.2.0
[INFO] [stderr]     Checking futures v0.3.5
[INFO] [stderr]     Checking unison_wasm v0.1.0 (/opt/rustwide/workdir/wasm)
[INFO] [stderr]     Checking hyper v0.13.7
[INFO] [stderr]     Checking warp v0.2.5
[INFO] [stderr]     Checking unison_rs v0.1.0 (/opt/rustwide/workdir/bin)
[INFO] [stdout] warning: unused variable: `k`
[INFO] [stdout]    --> bin/src/branch.rs:495:18
[INFO] [stdout]     |
[INFO] [stdout] 495 |             for (k, v) in &item.terms.d1 {
[INFO] [stdout]     |                  ^ help: if this is intentional, prefix it with an underscore: `_k`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> bin/src/chicken.rs:90:16
[INFO] [stdout]    |
[INFO] [stdout] 90 | fn pretty_list(mut left: usize, max_width: usize, items: &Vec<Chicken>) -> (String, usize) {
[INFO] [stdout]    |                ----^^^^
[INFO] [stdout]    |                |
[INFO] [stdout]    |                help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `k`
[INFO] [stdout]    --> bin/src/branch.rs:495:18
[INFO] [stdout]     |
[INFO] [stdout] 495 |             for (k, v) in &item.terms.d1 {
[INFO] [stdout]     |                  ^ help: if this is intentional, prefix it with an underscore: `_k`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> bin/src/chicken.rs:90:16
[INFO] [stdout]    |
[INFO] [stdout] 90 | fn pretty_list(mut left: usize, max_width: usize, items: &Vec<Chicken>) -> (String, usize) {
[INFO] [stdout]    |                ----^^^^
[INFO] [stdout]    |                |
[INFO] [stdout]    |                help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2m 14s
[INFO] running `Command { std: "docker" "inspect" "fea8b30fe77b07654e57f1d936a0192766c6b59faecbc43e7b739b9658d1fab3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fea8b30fe77b07654e57f1d936a0192766c6b59faecbc43e7b739b9658d1fab3", kill_on_drop: false }`
[INFO] [stdout] fea8b30fe77b07654e57f1d936a0192766c6b59faecbc43e7b739b9658d1fab3