[INFO] fetching crate crucible 0.0.0...
[INFO] checking crucible-0.0.0 against beta for pr-78714
[INFO] extracting crate crucible 0.0.0 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate crucible 0.0.0 on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate crucible 0.0.0
[INFO] finished tweaking crates.io crate crucible 0.0.0
[INFO] tweaked toml for crates.io crate crucible 0.0.0 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "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] 5ce051a4bfc8568ba69d68ef93d7b509a3c6182e80188fc59e49f41ce0a2cace
[INFO] running `Command { std: "docker" "start" "-a" "5ce051a4bfc8568ba69d68ef93d7b509a3c6182e80188fc59e49f41ce0a2cace", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5ce051a4bfc8568ba69d68ef93d7b509a3c6182e80188fc59e49f41ce0a2cace", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5ce051a4bfc8568ba69d68ef93d7b509a3c6182e80188fc59e49f41ce0a2cace", kill_on_drop: false }`
[INFO] [stdout] 5ce051a4bfc8568ba69d68ef93d7b509a3c6182e80188fc59e49f41ce0a2cace
[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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d4129755293244214f764a73da8942ae4d84f9b01cdd2743ca5aabfb2851d6ea
[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" "d4129755293244214f764a73da8942ae4d84f9b01cdd2743ca5aabfb2851d6ea", kill_on_drop: false }`
[INFO] [stderr]     Checking histogram v0.6.9
[INFO] [stderr]     Checking hsl v0.1.1
[INFO] [stderr]     Checking ascii v0.7.1
[INFO] [stderr]     Checking allan v0.2.4
[INFO] [stderr]     Checking mpmc v0.1.5
[INFO] [stderr]     Checking stb_truetype v0.1.2
[INFO] [stderr]     Checking clocksource v0.2.4
[INFO] [stderr]     Checking chrono v0.2.25
[INFO] [stderr]     Checking uuid v0.1.18
[INFO] [stderr]     Checking heatmap v0.6.6
[INFO] [stderr]     Checking url v0.2.38
[INFO] [stderr]     Checking rusttype v0.1.2
[INFO] [stderr]     Checking waterfall v0.7.1
[INFO] [stderr]     Checking tiny_http v0.5.9
[INFO] [stderr]     Checking tic v0.2.4
[INFO] [stderr]     Checking crucible v0.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/metrics.rs:10:19
[INFO] [stdout]    |
[INFO] [stdout] 10 |     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
[INFO] [stdout]    |                   ^ help: if this is intentional, prefix it with an underscore: `_f`
[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: unused variable: `f`
[INFO] [stdout]   --> src/metrics.rs:10:19
[INFO] [stdout]    |
[INFO] [stdout] 10 |     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
[INFO] [stdout]    |                   ^ help: if this is intentional, prefix it with an underscore: `_f`
[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] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.73s
[INFO] running `Command { std: "docker" "inspect" "d4129755293244214f764a73da8942ae4d84f9b01cdd2743ca5aabfb2851d6ea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d4129755293244214f764a73da8942ae4d84f9b01cdd2743ca5aabfb2851d6ea", kill_on_drop: false }`
[INFO] [stdout] d4129755293244214f764a73da8942ae4d84f9b01cdd2743ca5aabfb2851d6ea