[INFO] cloning repository https://github.com/semahawk/page_replacement
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/semahawk/page_replacement" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsemahawk%2Fpage_replacement", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsemahawk%2Fpage_replacement'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 23b35a253abd5dfe830aee205ed173dd1e38ad7f
[INFO] checking semahawk/page_replacement against master#a609fb45efad59dfd459c76e50899be9f0583b5a for pr-80579
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsemahawk%2Fpage_replacement" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/semahawk/page_replacement on toolchain a609fb45efad59dfd459c76e50899be9f0583b5a
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/semahawk/page_replacement
[INFO] finished tweaking git repo https://github.com/semahawk/page_replacement
[INFO] tweaked toml for git repo https://github.com/semahawk/page_replacement written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/semahawk/page_replacement already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "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-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1b8e902b45abe9ffe6c9c4a175e5980f72768a649b0742ffdd075a847b3abab6
[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" "1b8e902b45abe9ffe6c9c4a175e5980f72768a649b0742ffdd075a847b3abab6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1b8e902b45abe9ffe6c9c4a175e5980f72768a649b0742ffdd075a847b3abab6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1b8e902b45abe9ffe6c9c4a175e5980f72768a649b0742ffdd075a847b3abab6", kill_on_drop: false }`
[INFO] [stdout] 1b8e902b45abe9ffe6c9c4a175e5980f72768a649b0742ffdd075a847b3abab6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 762bf39140be841950e0a0872d5a78b6fe5ba2ec6b7dc1f7213ba0f8ad44b0a5
[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" "762bf39140be841950e0a0872d5a78b6fe5ba2ec6b7dc1f7213ba0f8ad44b0a5", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.21
[INFO] [stderr]     Checking rand v0.3.15
[INFO] [stderr]     Checking page_replacement v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `swapped_to_disk`
[INFO] [stdout]   --> src/memory.rs:12:3
[INFO] [stdout]    |
[INFO] [stdout] 12 |   swapped_to_disk: bool,
[INFO] [stdout]    |   ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `swapped_to_disk`
[INFO] [stdout]   --> src/memory.rs:12:3
[INFO] [stdout]    |
[INFO] [stdout] 12 |   swapped_to_disk: bool,
[INFO] [stdout]    |   ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` 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 1.93s
[INFO] running `Command { std: "docker" "inspect" "762bf39140be841950e0a0872d5a78b6fe5ba2ec6b7dc1f7213ba0f8ad44b0a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "762bf39140be841950e0a0872d5a78b6fe5ba2ec6b7dc1f7213ba0f8ad44b0a5", kill_on_drop: false }`
[INFO] [stdout] 762bf39140be841950e0a0872d5a78b6fe5ba2ec6b7dc1f7213ba0f8ad44b0a5