[INFO] cloning repository https://github.com/herabit/slotted
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/herabit/slotted" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fherabit%2Fslotted", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fherabit%2Fslotted'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e72907e114629e05062b87d320355985cfeebb5b
[INFO] checking herabit/slotted against try#2b39fe756f52bc2825bf5b2bfc385cab922dae10 for pr-143011
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fherabit%2Fslotted" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/herabit/slotted
[INFO] finished tweaking git repo https://github.com/herabit/slotted
[INFO] tweaked toml for git repo https://github.com/herabit/slotted written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/herabit/slotted on toolchain 2b39fe756f52bc2825bf5b2bfc385cab922dae10
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2b39fe756f52bc2825bf5b2bfc385cab922dae10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/herabit/slotted already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2b39fe756f52bc2825bf5b2bfc385cab922dae10" "fetch" "--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-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+2b39fe756f52bc2825bf5b2bfc385cab922dae10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 82cee8bb5005896fbf8038a1945e0162e1637068f1aff11cbc17382f2c57af00
[INFO] running `Command { std: "docker" "start" "-a" "82cee8bb5005896fbf8038a1945e0162e1637068f1aff11cbc17382f2c57af00", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "82cee8bb5005896fbf8038a1945e0162e1637068f1aff11cbc17382f2c57af00", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "82cee8bb5005896fbf8038a1945e0162e1637068f1aff11cbc17382f2c57af00", kill_on_drop: false }`
[INFO] [stdout] 82cee8bb5005896fbf8038a1945e0162e1637068f1aff11cbc17382f2c57af00
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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" "RUSTDOCFLAGS=--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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+2b39fe756f52bc2825bf5b2bfc385cab922dae10" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 126f8f0830328da7c6ca930384b03aab554956f35116cfd299feadec50448efe
[INFO] running `Command { std: "docker" "start" "-a" "126f8f0830328da7c6ca930384b03aab554956f35116cfd299feadec50448efe", kill_on_drop: false }`
[INFO] [stderr]     Checking slotted v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Status`
[INFO] [stdout]  --> src/slot/occupied.rs:9:25
[INFO] [stdout]   |
[INFO] [stdout] 9 | use crate::slot::{Slot, Status};
[INFO] [stdout]   |                         ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::ContentMut`
[INFO] [stdout]   --> src/slot/occupied.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use super::ContentMut;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `#[inline]` is ignored on externally exported functions
[INFO] [stdout]   --> src/slot/gen.rs:52:5
[INFO] [stdout]    |
[INFO] [stdout] 52 |     #[inline]
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: externally exported functions are functions with `#[no_mangle]`, `#[export_name]`, or `#[linkage]`
[INFO] [stdout]    = note: `#[warn(unused_attributes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `#[inline]` is ignored on externally exported functions
[INFO] [stdout]   --> src/slot/gen.rs:64:5
[INFO] [stdout]    |
[INFO] [stdout] 64 |     #[inline]
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: externally exported functions are functions with `#[no_mangle]`, `#[export_name]`, or `#[linkage]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `#[inline]` is ignored on externally exported functions
[INFO] [stdout]   --> src/slot/gen.rs:73:5
[INFO] [stdout]    |
[INFO] [stdout] 73 |     #[inline]
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: externally exported functions are functions with `#[no_mangle]`, `#[export_name]`, or `#[linkage]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Status`
[INFO] [stdout]  --> src/slot/occupied.rs:9:25
[INFO] [stdout]   |
[INFO] [stdout] 9 | use crate::slot::{Slot, Status};
[INFO] [stdout]   |                         ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::ContentMut`
[INFO] [stdout]   --> src/slot/occupied.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use super::ContentMut;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `#[inline]` is ignored on externally exported functions
[INFO] [stdout]   --> src/slot/gen.rs:52:5
[INFO] [stdout]    |
[INFO] [stdout] 52 |     #[inline]
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: externally exported functions are functions with `#[no_mangle]`, `#[export_name]`, or `#[linkage]`
[INFO] [stdout]    = note: `#[warn(unused_attributes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `#[inline]` is ignored on externally exported functions
[INFO] [stdout]   --> src/slot/gen.rs:64:5
[INFO] [stdout]    |
[INFO] [stdout] 64 |     #[inline]
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: externally exported functions are functions with `#[no_mangle]`, `#[export_name]`, or `#[linkage]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `#[inline]` is ignored on externally exported functions
[INFO] [stdout]   --> src/slot/gen.rs:73:5
[INFO] [stdout]    |
[INFO] [stdout] 73 |     #[inline]
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: externally exported functions are functions with `#[no_mangle]`, `#[export_name]`, or `#[linkage]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `source`
[INFO] [stdout]   --> src/slot.rs:76:30
[INFO] [stdout]    |
[INFO] [stdout] 76 |     fn clone_from(&mut self, source: &Self) {
[INFO] [stdout]    |                              ^^^^^^ help: if this is intentional, prefix it with an underscore: `_source`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `slots`, `next_vacant`, and `next_poison` are never read
[INFO] [stdout]   --> src/lib.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct Slotted<T> {
[INFO] [stdout]    |            ------- fields in this struct
[INFO] [stdout] 11 |     slots: Vec<Slot<T>>,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 12 |     next_vacant: Option<u32>,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 13 |     next_poison: Option<u32>,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `source`
[INFO] [stdout]   --> src/slot.rs:76:30
[INFO] [stdout]    |
[INFO] [stdout] 76 |     fn clone_from(&mut self, source: &Self) {
[INFO] [stdout]    |                              ^^^^^^ help: if this is intentional, prefix it with an underscore: `_source`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `slots`, `next_vacant`, and `next_poison` are never read
[INFO] [stdout]   --> src/lib.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct Slotted<T> {
[INFO] [stdout]    |            ------- fields in this struct
[INFO] [stdout] 11 |     slots: Vec<Slot<T>>,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 12 |     next_vacant: Option<u32>,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 13 |     next_poison: Option<u32>,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.13s
[INFO] running `Command { std: "docker" "inspect" "126f8f0830328da7c6ca930384b03aab554956f35116cfd299feadec50448efe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "126f8f0830328da7c6ca930384b03aab554956f35116cfd299feadec50448efe", kill_on_drop: false }`
[INFO] [stdout] 126f8f0830328da7c6ca930384b03aab554956f35116cfd299feadec50448efe