[INFO] fetching crate stratum-types 0.9.25...
[INFO] checking stratum-types-0.9.25 against beta for pr-78714
[INFO] extracting crate stratum-types 0.9.25 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate stratum-types 0.9.25 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 stratum-types 0.9.25
[INFO] finished tweaking crates.io crate stratum-types 0.9.25
[INFO] tweaked toml for crates.io crate stratum-types 0.9.25 written to /workspace/builds/worker-2/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] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8656014f6bec6b2eb5bbb6c1cc7524116e8b999e4db38fab16b14069469e5923
[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" "8656014f6bec6b2eb5bbb6c1cc7524116e8b999e4db38fab16b14069469e5923", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8656014f6bec6b2eb5bbb6c1cc7524116e8b999e4db38fab16b14069469e5923", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8656014f6bec6b2eb5bbb6c1cc7524116e8b999e4db38fab16b14069469e5923", kill_on_drop: false }`
[INFO] [stdout] 8656014f6bec6b2eb5bbb6c1cc7524116e8b999e4db38fab16b14069469e5923
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cd900c31c651dcf187ff94f3689d437227330d6a6800200e7eababf437785b7c
[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" "cd900c31c651dcf187ff94f3689d437227330d6a6800200e7eababf437785b7c", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling serde_tuple v0.4.0
[INFO] [stderr]     Checking futures-util v0.3.8
[INFO] [stderr]     Checking uuid v0.8.1
[INFO] [stderr]     Checking futures-executor v0.3.8
[INFO] [stderr]     Checking futures v0.3.8
[INFO] [stderr]     Checking stratum-types v0.9.25 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `SeqAccess`
[INFO] [stdout]   --> src/lib.rs:11:34
[INFO] [stdout]    |
[INFO] [stdout] 11 | use serde::de::{self, MapAccess, SeqAccess, Visitor};
[INFO] [stdout]    |                                  ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `SeqAccess`
[INFO] [stdout]   --> src/lib.rs:11:34
[INFO] [stdout]    |
[INFO] [stdout] 11 | use serde::de::{self, MapAccess, SeqAccess, Visitor};
[INFO] [stdout]    |                                  ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` 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 10.03s
[INFO] running `Command { std: "docker" "inspect" "cd900c31c651dcf187ff94f3689d437227330d6a6800200e7eababf437785b7c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cd900c31c651dcf187ff94f3689d437227330d6a6800200e7eababf437785b7c", kill_on_drop: false }`
[INFO] [stdout] cd900c31c651dcf187ff94f3689d437227330d6a6800200e7eababf437785b7c