[INFO] cloning repository https://github.com/Tahler/snoss
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Tahler/snoss" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTahler%2Fsnoss", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTahler%2Fsnoss'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d4dca754c3e97fa7119cc71170c5f54a8a3e71d8
[INFO] checking Tahler/snoss against try#45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4 for pr-83744
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTahler%2Fsnoss" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Tahler/snoss on toolchain 45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Tahler/snoss
[INFO] finished tweaking git repo https://github.com/Tahler/snoss
[INFO] tweaked toml for git repo https://github.com/Tahler/snoss written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/Tahler/snoss already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "fetch" "--locked" "--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 humantime v1.0.0
[INFO] [stderr]   Downloaded serde_derive v0.9.7
[INFO] [stderr]   Downloaded serde v0.9.7
[INFO] [stderr]   Downloaded ordered-float v0.4.0
[INFO] [stderr]   Downloaded serde-value v0.4.0
[INFO] [stderr]   Downloaded serde_json v0.9.6
[INFO] [stderr]   Downloaded serde_yaml v0.6.1
[INFO] [stderr]   Downloaded log4rs v0.6.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 78774a68be266a2fa86df86fc2430268d8b955f1b3ab0bc17d0e4677701eedec
[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" "78774a68be266a2fa86df86fc2430268d8b955f1b3ab0bc17d0e4677701eedec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "78774a68be266a2fa86df86fc2430268d8b955f1b3ab0bc17d0e4677701eedec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "78774a68be266a2fa86df86fc2430268d8b955f1b3ab0bc17d0e4677701eedec", kill_on_drop: false }`
[INFO] [stdout] 78774a68be266a2fa86df86fc2430268d8b955f1b3ab0bc17d0e4677701eedec
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 70a45ec6cd93d6da287fad9fbcec4a1758c5d4f7a87be30f43055be5bf50547b
[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" "70a45ec6cd93d6da287fad9fbcec4a1758c5d4f7a87be30f43055be5bf50547b", kill_on_drop: false }`
[INFO] [stderr]     Checking num-traits v0.1.36
[INFO] [stderr]    Compiling gcc v0.3.43
[INFO] [stderr]     Checking libc v0.2.20
[INFO] [stderr]     Checking serde v0.9.7
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]    Compiling quote v0.3.12
[INFO] [stderr]     Checking linked-hash-map v0.3.0
[INFO] [stderr]     Checking traitobject v0.1.0
[INFO] [stderr]     Checking quick-error v1.1.0
[INFO] [stderr]     Checking crossbeam v0.2.10
[INFO] [stderr]     Checking antidote v1.0.0
[INFO] [stderr]     Checking log v0.3.6
[INFO] [stderr]     Checking unreachable v0.1.1
[INFO] [stderr]     Checking unsafe-any v0.4.1
[INFO] [stderr]     Checking humantime v1.0.0
[INFO] [stderr]     Checking yaml-rust v0.3.5
[INFO] [stderr]     Checking typemap v0.3.3
[INFO] [stderr]    Compiling syn v0.11.4
[INFO] [stderr]     Checking time v0.1.36
[INFO] [stderr]     Checking num-integer v0.1.32
[INFO] [stderr]     Checking ordered-float v0.4.0
[INFO] [stderr]     Checking enum_primitive v0.1.1
[INFO] [stderr]    Compiling miniz-sys v0.1.9
[INFO] [stderr]     Checking num-iter v0.1.32
[INFO] [stderr]     Checking num v0.1.36
[INFO] [stderr]     Checking chrono v0.3.0
[INFO] [stderr]     Checking flate2 v0.2.17
[INFO] [stderr]    Compiling serde_codegen_internals v0.13.0
[INFO] [stderr]     Checking serde_json v0.9.6
[INFO] [stderr]     Checking serde-value v0.4.0
[INFO] [stderr]     Checking serde_yaml v0.6.1
[INFO] [stderr]    Compiling serde_derive v0.9.7
[INFO] [stderr]     Checking log4rs v0.6.1
[INFO] [stderr]     Checking snoss v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/os/exec.rs:194:13
[INFO] [stdout]     |
[INFO] [stdout] 194 |         let mut stack = pcb.get_stack_mut();
[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: variable does not need to be mutable
[INFO] [stdout]    --> src/os/exec.rs:194:13
[INFO] [stdout]     |
[INFO] [stdout] 194 |         let mut stack = pcb.get_stack_mut();
[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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 24.98s
[INFO] running `Command { std: "docker" "inspect" "70a45ec6cd93d6da287fad9fbcec4a1758c5d4f7a87be30f43055be5bf50547b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "70a45ec6cd93d6da287fad9fbcec4a1758c5d4f7a87be30f43055be5bf50547b", kill_on_drop: false }`
[INFO] [stdout] 70a45ec6cd93d6da287fad9fbcec4a1758c5d4f7a87be30f43055be5bf50547b