[INFO] updating cached repository https://github.com/Shirotha/handling-arena
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] cdb7f09798de385e84759a5ce851ad7fa85f02c2
[INFO] checking Shirotha/handling-arena/cdb7f09798de385e84759a5ce851ad7fa85f02c2 against try#88b8a1c6e3a6f6f8a2ed6b6a9a74e0ef1862f72c for pr-154887
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FShirotha%2Fhandling-arena" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-2-tc2/source/.cargo/config.toml
[INFO] removed /workspace/builds/worker-2-tc2/source/rust-toolchain.toml
[INFO] started tweaking git repo https://github.com/Shirotha/handling-arena
[INFO] finished tweaking git repo https://github.com/Shirotha/handling-arena
[INFO] tweaked toml for git repo https://github.com/Shirotha/handling-arena written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Shirotha/handling-arena on toolchain 88b8a1c6e3a6f6f8a2ed6b6a9a74e0ef1862f72c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+88b8a1c6e3a6f6f8a2ed6b6a9a74e0ef1862f72c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Shirotha/handling-arena 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" "+88b8a1c6e3a6f6f8a2ed6b6a9a74e0ef1862f72c" "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-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+88b8a1c6e3a6f6f8a2ed6b6a9a74e0ef1862f72c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dccc99a6d142e8e7446f0634d8508af6a58481ca988c2f96a7ef7943f5359228
[INFO] running `Command { std: "docker" "start" "-a" "dccc99a6d142e8e7446f0634d8508af6a58481ca988c2f96a7ef7943f5359228", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dccc99a6d142e8e7446f0634d8508af6a58481ca988c2f96a7ef7943f5359228", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dccc99a6d142e8e7446f0634d8508af6a58481ca988c2f96a7ef7943f5359228", kill_on_drop: false }`
[INFO] [stdout] dccc99a6d142e8e7446f0634d8508af6a58481ca988c2f96a7ef7943f5359228
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+88b8a1c6e3a6f6f8a2ed6b6a9a74e0ef1862f72c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 196733b9f5f2bfb7c0383d6cd0f3b4c41b990ea00caf70c2cc48913ff618b264
[INFO] running `Command { std: "docker" "start" "-a" "196733b9f5f2bfb7c0383d6cd0f3b4c41b990ea00caf70c2cc48913ff618b264", kill_on_drop: false }`
[INFO] [stderr]     Checking niche_collections v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `index`
[INFO] [stdout]   --> src/alloc/store/intervaltree.rs:27:19
[INFO] [stdout]    |
[INFO] [stdout] 27 |     fn get(&self, index: <Multi<T> as Element>::Index) -> SResult<<Multi<T> as Element>::Ref<'_>> {
[INFO] [stdout]    |                   ^^^^^ help: if this is intentional, prefix it with an underscore: `_index`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `index`
[INFO] [stdout]   --> src/alloc/store/intervaltree.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |         index: <Multi<T> as Element>::Index,
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_index`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `args`
[INFO] [stdout]   --> src/alloc/store/intervaltree.rs:46:9
[INFO] [stdout]    |
[INFO] [stdout] 46 |         args: Length,
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `new_capacity`
[INFO] [stdout]   --> src/alloc/store/intervaltree.rs:56:25
[INFO] [stdout]    |
[INFO] [stdout] 56 |     fn widen(&mut self, new_capacity: Length) -> SResult<()> {
[INFO] [stdout]    |                         ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_new_capacity`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `index`
[INFO] [stdout]   --> src/alloc/store/intervaltree.rs:77:35
[INFO] [stdout]    |
[INFO] [stdout] 77 |     fn remove_indirect(&mut self, index: <Multi<T> as Element>::Index) -> SResult<Self::Guard<'_>> {
[INFO] [stdout]    |                                   ^^^^^ help: if this is intentional, prefix it with an underscore: `_index`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `index`
[INFO] [stdout]   --> src/alloc/store/intervaltree.rs:27:19
[INFO] [stdout]    |
[INFO] [stdout] 27 |     fn get(&self, index: <Multi<T> as Element>::Index) -> SResult<<Multi<T> as Element>::Ref<'_>> {
[INFO] [stdout]    |                   ^^^^^ help: if this is intentional, prefix it with an underscore: `_index`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `index`
[INFO] [stdout]   --> src/alloc/store/intervaltree.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |         index: <Multi<T> as Element>::Index,
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_index`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `args`
[INFO] [stdout]   --> src/alloc/store/intervaltree.rs:46:9
[INFO] [stdout]    |
[INFO] [stdout] 46 |         args: Length,
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `new_capacity`
[INFO] [stdout]   --> src/alloc/store/intervaltree.rs:56:25
[INFO] [stdout]    |
[INFO] [stdout] 56 |     fn widen(&mut self, new_capacity: Length) -> SResult<()> {
[INFO] [stdout]    |                         ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_new_capacity`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `index`
[INFO] [stdout]   --> src/alloc/store/intervaltree.rs:77:35
[INFO] [stdout]    |
[INFO] [stdout] 77 |     fn remove_indirect(&mut self, index: <Multi<T> as Element>::Index) -> SResult<Self::Guard<'_>> {
[INFO] [stdout]    |                                   ^^^^^ help: if this is intentional, prefix it with an underscore: `_index`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `x` is never read
[INFO] [stdout]   --> src/alloc/store/intervaltree.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub struct IntervaltreeStore<T> {
[INFO] [stdout]    |            ----------------- field in this struct
[INFO] [stdout] 22 |     // HACK: temporary get rid of compiler error
[INFO] [stdout] 23 |     x: T,
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Sealed` is never used
[INFO] [stdout]  --> src/lib.rs:4:15
[INFO] [stdout]   |
[INFO] [stdout] 4 |     pub trait Sealed {}
[INFO] [stdout]   |               ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `x` is never read
[INFO] [stdout]   --> src/alloc/store/intervaltree.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub struct IntervaltreeStore<T> {
[INFO] [stdout]    |            ----------------- field in this struct
[INFO] [stdout] 22 |     // HACK: temporary get rid of compiler error
[INFO] [stdout] 23 |     x: T,
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Sealed` is never used
[INFO] [stdout]  --> src/lib.rs:4:15
[INFO] [stdout]   |
[INFO] [stdout] 4 |     pub trait Sealed {}
[INFO] [stdout]   |               ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.88s
[INFO] running `Command { std: "docker" "inspect" "196733b9f5f2bfb7c0383d6cd0f3b4c41b990ea00caf70c2cc48913ff618b264", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "196733b9f5f2bfb7c0383d6cd0f3b4c41b990ea00caf70c2cc48913ff618b264", kill_on_drop: false }`
[INFO] [stdout] 196733b9f5f2bfb7c0383d6cd0f3b4c41b990ea00caf70c2cc48913ff618b264