[INFO] cloning repository https://github.com/dezgeg/nix-rebuild-stats
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dezgeg/nix-rebuild-stats" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdezgeg%2Fnix-rebuild-stats", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdezgeg%2Fnix-rebuild-stats'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 909b97402dad8ecc95d96dc685e4024476819496
[INFO] checking dezgeg/nix-rebuild-stats against try#f47dd4da3ae8c32c9e65d307bfe640b143e674df for pr-77526
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdezgeg%2Fnix-rebuild-stats" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/dezgeg/nix-rebuild-stats 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/dezgeg/nix-rebuild-stats
[INFO] finished tweaking git repo https://github.com/dezgeg/nix-rebuild-stats
[INFO] tweaked toml for git repo https://github.com/dezgeg/nix-rebuild-stats written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/dezgeg/nix-rebuild-stats 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rustc-serialize v0.3.23
[INFO] [stderr]   Downloaded from-ascii v0.0.1
[INFO] [stderr]   Downloaded quick-xml v0.6.2
[INFO] [stderr]   Downloaded encoding_rs v0.5.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] 4a518b7336f1606810c407b5ecd801c6a606e5b69e3d59090e266d0d7fbfa063
[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" "4a518b7336f1606810c407b5ecd801c6a606e5b69e3d59090e266d0d7fbfa063", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4a518b7336f1606810c407b5ecd801c6a606e5b69e3d59090e266d0d7fbfa063", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4a518b7336f1606810c407b5ecd801c6a606e5b69e3d59090e266d0d7fbfa063", kill_on_drop: false }`
[INFO] [stdout] 4a518b7336f1606810c407b5ecd801c6a606e5b69e3d59090e266d0d7fbfa063
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 91c12337115e0e502cc7215d58a9cd8f157689f8edfaff168b54fb1e5f5090d2
[INFO] running `Command { std: "docker" "start" "-a" "91c12337115e0e502cc7215d58a9cd8f157689f8edfaff168b54fb1e5f5090d2", kill_on_drop: false }`
[INFO] [stderr]     Checking rustc-demangle v0.1.4
[INFO] [stderr]     Checking from-ascii v0.0.1
[INFO] [stderr]    Compiling backtrace-sys v0.1.10
[INFO] [stderr]     Checking encoding_rs v0.5.0
[INFO] [stderr]     Checking backtrace v0.3.0
[INFO] [stderr]     Checking error-chain v0.10.0
[INFO] [stderr]     Checking quick-xml v0.6.2
[INFO] [stderr]     Checking nix-rebuild-stats v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `drv_paths`
[INFO] [stdout]   --> src/main.rs:40:19
[INFO] [stdout]    |
[INFO] [stdout] 40 | fn build_dep_tree(drv_paths: Vec<String>) -> HashMap<String, Vec<String>> {
[INFO] [stdout]    |                   ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_drv_paths`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `drv_paths`
[INFO] [stdout]   --> src/main.rs:40:19
[INFO] [stdout]    |
[INFO] [stdout] 40 | fn build_dep_tree(drv_paths: Vec<String>) -> HashMap<String, Vec<String>> {
[INFO] [stdout]    |                   ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_drv_paths`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` 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 23.04s
[INFO] running `Command { std: "docker" "inspect" "91c12337115e0e502cc7215d58a9cd8f157689f8edfaff168b54fb1e5f5090d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "91c12337115e0e502cc7215d58a9cd8f157689f8edfaff168b54fb1e5f5090d2", kill_on_drop: false }`
[INFO] [stdout] 91c12337115e0e502cc7215d58a9cd8f157689f8edfaff168b54fb1e5f5090d2