[INFO] cloning repository https://github.com/michal-hynek/ultimate-rust-fundations
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/michal-hynek/ultimate-rust-fundations" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmichal-hynek%2Fultimate-rust-fundations", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmichal-hynek%2Fultimate-rust-fundations'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1255415f1a30c79319eab266a400ce7cc7495505
[INFO] checking michal-hynek/ultimate-rust-fundations against try#1c4199da70f816f2239f41c55168ff75a3663718 for 155501-infallible-never-no-reservation
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmichal-hynek%2Fultimate-rust-fundations" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/michal-hynek/ultimate-rust-fundations
[INFO] finished tweaking git repo https://github.com/michal-hynek/ultimate-rust-fundations
[INFO] tweaked toml for git repo https://github.com/michal-hynek/ultimate-rust-fundations written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/michal-hynek/ultimate-rust-fundations on toolchain 1c4199da70f816f2239f41c55168ff75a3663718
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1c4199da70f816f2239f41c55168ff75a3663718" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/michal-hynek/ultimate-rust-fundations 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" "+1c4199da70f816f2239f41c55168ff75a3663718" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: profiles for the non root package will be ignored, specify profiles at the workspace root:
[INFO] [stderr] package:   /workspace/builds/worker-0-tc1/source/src/collector/Cargo.toml
[INFO] [stderr] workspace: /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded thread-priority v1.2.0
[INFO] [stderr]   Downloaded fs-err v3.1.1
[INFO] [stderr]   Downloaded core_affinity v0.8.3
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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" "+1c4199da70f816f2239f41c55168ff75a3663718" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "start" "-a" "6978bd79243ee218ff372632be42f1309d556d6613b06ce8dd37bc51e7c392a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6978bd79243ee218ff372632be42f1309d556d6613b06ce8dd37bc51e7c392a5", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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" "+1c4199da70f816f2239f41c55168ff75a3663718" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
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[INFO] [stderr] package:   /opt/rustwide/workdir/src/collector/Cargo.toml
[INFO] [stderr] workspace: /opt/rustwide/workdir/Cargo.toml
[INFO] [stderr]    Compiling syn v2.0.101
[INFO] [stderr]     Checking smallvec v1.15.0
[INFO] [stderr]    Compiling serde_json v1.0.141
[INFO] [stderr]    Compiling anyhow v1.0.98
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[INFO] [stderr]    Compiling typenum v1.18.0
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[INFO] [stderr]     Checking parking_lot_core v0.9.10
[INFO] [stderr]     Checking sync_wrapper v1.0.2
[INFO] [stderr]     Checking ipnet v2.11.0
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[INFO] [stderr]    Compiling ryu v1.0.20
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[INFO] [stderr]     Checking png v0.17.16
[INFO] [stderr]     Checking tiff v0.9.1
[INFO] [stderr]    Compiling bincode_derive v2.0.1
[INFO] [stderr]     Checking zune-jpeg v0.4.20
[INFO] [stderr]     Checking dashmap v6.1.0
[INFO] [stderr]    Compiling openssl-sys v0.9.109
[INFO] [stderr]    Compiling libsqlite3-sys v0.30.1
[INFO] [stderr]     Checking core_affinity v0.8.3
[INFO] [stderr]     Checking num-rational v0.4.2
[INFO] [stderr]     Checking thread-priority v1.2.0
[INFO] [stderr]     Checking sysinfo v0.36.1
[INFO] [stderr]     Checking bincode v2.0.1
[INFO] [stderr]    Compiling openssl v0.10.73
[INFO] [stderr]    Compiling native-tls v0.2.14
[INFO] [stderr]     Checking tpriority v0.1.0 (/opt/rustwide/workdir/src/tpriority)
[INFO] [stderr]     Checking affinity v0.1.0 (/opt/rustwide/workdir/src/affinity)
[INFO] [stderr]     Checking dashing v0.1.0 (/opt/rustwide/workdir/src/dashing)
[INFO] [stderr]     Checking workers2 v0.1.0 (/opt/rustwide/workdir/src/workers2)
[INFO] [stderr]     Checking memory2 v0.1.0 (/opt/rustwide/workdir/src/memory2)
[INFO] [stderr]     Checking rwlocks v0.1.0 (/opt/rustwide/workdir/src/rwlocks)
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]  --> src/memory2/src/main.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 |     let s = String::from("");
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking iterators v0.1.0 (/opt/rustwide/workdir/src/iterators)
[INFO] [stderr]     Checking scoped_threads v0.1.0 (/opt/rustwide/workdir/src/scoped_threads)
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]  --> src/memory2/src/main.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 |     let s = String::from("");
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking traits3 v0.1.0 (/opt/rustwide/workdir/src/traits3)
[INFO] [stderr]     Checking iterators2 v0.1.0 (/opt/rustwide/workdir/src/iterators2)
[INFO] [stderr]     Checking deadlocks v0.1.0 (/opt/rustwide/workdir/src/deadlocks)
[INFO] [stderr]     Checking mutexes v0.1.0 (/opt/rustwide/workdir/src/mutexes)
[INFO] [stderr]     Checking cycles v0.1.0 (/opt/rustwide/workdir/src/cycles)
[INFO] [stderr]     Checking refc v0.1.0 (/opt/rustwide/workdir/src/refc)
[INFO] [stderr]     Checking memory v0.1.0 (/opt/rustwide/workdir/src/memory)
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/iterators2/src/main.rs:23:13
[INFO] [stdout]    |
[INFO] [stdout] 23 |     fn iter(&self) -> HashMapBucketIter<K, V> {
[INFO] [stdout]    |             ^^^^^     ^^^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |             |
[INFO] [stdout]    |             the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 23 |     fn iter(&self) -> HashMapBucketIter<'_, K, V> {
[INFO] [stdout]    |                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking divide_work v0.1.0 (/opt/rustwide/workdir/src/divide_work)
[INFO] [stderr]     Checking generics2 v0.1.0 (/opt/rustwide/workdir/src/generics2)
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/cycles/src/main.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 |     Strong(Rc<Node>),
[INFO] [stdout]    |     ------ ^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `NextNode` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 12 -     Strong(Rc<Node>),
[INFO] [stdout] 12 +     Strong(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/cycles/src/main.rs:13:10
[INFO] [stdout]    |
[INFO] [stdout] 13 |     Weak(Weak<Node>),
[INFO] [stdout]    |     ---- ^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `NextNode` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 13 -     Weak(Weak<Node>),
[INFO] [stdout] 13 +     Weak(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking generics v0.1.0 (/opt/rustwide/workdir/src/generics)
[INFO] [stderr]     Checking bytes2 v0.1.0 (/opt/rustwide/workdir/src/bytes2)
[INFO] [stderr]     Checking traits2 v0.1.0 (/opt/rustwide/workdir/src/traits2)
[INFO] [stderr]     Checking traits v0.1.0 (/opt/rustwide/workdir/src/traits)
[INFO] [stderr]     Checking hello_thread_params v0.1.0 (/opt/rustwide/workdir/src/hello_thread_params)
[INFO] [stderr]     Checking hello_thread_return v0.1.0 (/opt/rustwide/workdir/src/hello_thread_return)
[INFO] [stdout] warning: function `get_animal` is never used
[INFO] [stdout]   --> src/traits2/src/main.rs:30:4
[INFO] [stdout]    |
[INFO] [stdout] 30 | fn get_animal() -> impl Animal {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking lifetimes2 v0.1.0 (/opt/rustwide/workdir/src/lifetimes2)
[INFO] [stderr]     Checking refc2 v0.1.0 (/opt/rustwide/workdir/src/refc2)
[INFO] [stderr]     Checking refc4 v0.1.0 (/opt/rustwide/workdir/src/refc4)
[INFO] [stderr]     Checking greet v0.1.0 (/opt/rustwide/workdir/src/greet)
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/refc2/src/main.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |     for i in 0..10 {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking fileio v0.1.0 (/opt/rustwide/workdir/src/fileio)
[INFO] [stderr]     Checking thread_builder v0.1.0 (/opt/rustwide/workdir/src/thread_builder)
[INFO] [stderr]     Checking packing v0.1.0 (/opt/rustwide/workdir/src/packing)
[INFO] [stderr]     Checking channels1 v0.1.0 (/opt/rustwide/workdir/src/channels1)
[INFO] [stderr]     Checking footgun v0.1.0 (/opt/rustwide/workdir/src/footgun)
[INFO] [stdout] warning: field `a` is never read
[INFO] [stdout]  --> src/packing/src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct OneByte {
[INFO] [stdout]   |        ------- field in this struct
[INFO] [stdout] 2 |     a: u8,
[INFO] [stdout]   |     ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `a` is never read
[INFO] [stdout]  --> src/packing/src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct TwoBytes {
[INFO] [stdout]   |        -------- field in this struct
[INFO] [stdout] 6 |     a: u16,
[INFO] [stdout]   |     ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `a` is never read
[INFO] [stdout]   --> src/packing/src/main.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | struct FourBytes {
[INFO] [stdout]    |        --------- field in this struct
[INFO] [stdout] 16 |     a: u32,
[INFO] [stdout]    |     ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking lifetimes v0.1.0 (/opt/rustwide/workdir/src/lifetimes)
[INFO] [stderr]     Checking workers v0.1.0 (/opt/rustwide/workdir/src/workers)
[INFO] [stderr]     Checking generics3 v0.1.0 (/opt/rustwide/workdir/src/generics3)
[INFO] [stderr]     Checking dropping3 v0.1.0 (/opt/rustwide/workdir/src/dropping3)
[INFO] [stderr]     Checking parking v0.1.0 (/opt/rustwide/workdir/src/parking)
[INFO] [stderr]     Checking traits4 v0.1.0 (/opt/rustwide/workdir/src/traits4)
[INFO] [stderr]    Compiling futures-executor v0.3.31
[INFO] [stdout] warning: field `a` is never read
[INFO] [stdout]  --> src/packing/src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct OneByte {
[INFO] [stdout]   |        ------- field in this struct
[INFO] [stdout] 2 |     a: u8,
[INFO] [stdout]   |     ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `a` is never read
[INFO] [stdout]  --> src/packing/src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct TwoBytes {
[INFO] [stdout]   |        -------- field in this struct
[INFO] [stdout] 6 |     a: u16,
[INFO] [stdout]   |     ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `a` is never read
[INFO] [stdout]   --> src/packing/src/main.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | struct FourBytes {
[INFO] [stdout]    |        --------- field in this struct
[INFO] [stdout] 16 |     a: u32,
[INFO] [stdout]    |     ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking console_input v0.1.0 (/opt/rustwide/workdir/src/console_input)
[INFO] [stderr]     Checking dropping2 v0.1.0 (/opt/rustwide/workdir/src/dropping2)
[INFO] [stderr]     Checking hello_thread v0.1.0 (/opt/rustwide/workdir/src/hello_thread)
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/cycles/src/main.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 |     Strong(Rc<Node>),
[INFO] [stdout]    |     ------ ^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `NextNode` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 12 -     Strong(Rc<Node>),
[INFO] [stdout] 12 +     Strong(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/cycles/src/main.rs:13:10
[INFO] [stdout]    |
[INFO] [stdout] 13 |     Weak(Weak<Node>),
[INFO] [stdout]    |     ---- ^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `NextNode` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 13 -     Weak(Weak<Node>),
[INFO] [stdout] 13 +     Weak(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking atomics v0.1.0 (/opt/rustwide/workdir/src/atomics)
[INFO] [stderr]     Checking refc3 v0.1.0 (/opt/rustwide/workdir/src/refc3)
[INFO] [stdout] warning: fields `id` and `x` are never read
[INFO] [stdout]   --> src/dropping2/src/main.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 18 | struct HasDropables {
[INFO] [stdout]    |        ------------ fields in this struct
[INFO] [stdout] 19 |     id: i32,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 20 |     x: MyStruct,
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking top_level v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `id` and `x` are never read
[INFO] [stdout]   --> src/dropping2/src/main.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 18 | struct HasDropables {
[INFO] [stdout]    |        ------------ fields in this struct
[INFO] [stdout] 19 |     id: i32,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 20 |     x: MyStruct,
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking refc5 v0.1.0 (/opt/rustwide/workdir/src/refc5)
[INFO] [stderr]     Checking hello_world v0.1.0 (/opt/rustwide/workdir/src/hello_world)
[INFO] [stderr]     Checking dropping v0.1.0 (/opt/rustwide/workdir/src/dropping)
[INFO] [stdout] warning: function `get_animal` is never used
[INFO] [stdout]   --> src/traits2/src/main.rs:30:4
[INFO] [stdout]    |
[INFO] [stdout] 30 | fn get_animal() -> impl Animal {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking poisoning v0.1.0 (/opt/rustwide/workdir/src/poisoning)
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/refc2/src/main.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |     for i in 0..10 {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/iterators2/src/main.rs:23:13
[INFO] [stdout]    |
[INFO] [stdout] 23 |     fn iter(&self) -> HashMapBucketIter<K, V> {
[INFO] [stdout]    |             ^^^^^     ^^^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |             |
[INFO] [stdout]    |             the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 23 |     fn iter(&self) -> HashMapBucketIter<'_, K, V> {
[INFO] [stdout]    |                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling synstructure v0.13.2
[INFO] [stderr]    Compiling tokio-macros v2.5.0
[INFO] [stderr]    Compiling serde_derive v1.0.219
[INFO] [stderr]    Compiling zerofrom-derive v0.1.6
[INFO] [stderr]    Compiling yoke-derive v0.8.0
[INFO] [stderr]    Compiling zerovec-derive v0.11.1
[INFO] [stderr]    Compiling displaydoc v0.2.5
[INFO] [stderr]    Compiling tracing-attributes v0.1.30
[INFO] [stderr]    Compiling futures-macro v0.3.31
[INFO] [stderr]    Compiling openssl-macros v0.1.1
[INFO] [stderr]    Compiling thiserror-impl v2.0.12
[INFO] [stderr]    Compiling equator-macro v0.4.2
[INFO] [stderr]    Compiling bytemuck_derive v1.10.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.69
[INFO] [stderr]     Checking equator v0.4.2
[INFO] [stderr]     Checking aligned-vec v0.6.4
[INFO] [stderr]    Compiling profiling-procmacros v1.0.17
[INFO] [stderr]     Checking v_frame v0.3.9
[INFO] [stderr]    Compiling num-derive v0.4.2
[INFO] [stderr]     Checking profiling v1.0.17
[INFO] [stderr]     Checking av1-grain v0.2.4
[INFO] [stderr]    Compiling arg_enum_proc_macro v0.3.4
[INFO] [stderr]     Checking thiserror v1.0.69
[INFO] [stderr]     Checking bytemuck v1.23.1
[INFO] [stderr]    Compiling clap_derive v4.5.32
[INFO] [stderr]    Compiling tokio-stream v0.1.17
[INFO] [stderr]     Checking zerofrom v0.1.6
[INFO] [stderr]     Checking tracing v0.1.41
[INFO] [stderr]     Checking thiserror v2.0.12
[INFO] [stderr]     Checking yoke v0.8.0
[INFO] [stderr]     Checking zerovec v0.11.2
[INFO] [stderr]     Checking zerotrie v0.2.2
[INFO] [stderr]     Checking axum-core v0.5.2
[INFO] [stderr]     Checking qoi v0.4.1
[INFO] [stderr]    Compiling async-recursion v1.1.1
[INFO] [stderr]     Checking bytes v0.1.0 (/opt/rustwide/workdir/src/bytes)
[INFO] [stderr] error: could not compile `tokio` (lib)
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/1c4199da70f816f2239f41c55168ff75a3663718/bin/rustc --crate-name tokio --edition=2021 /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/tokio-1.47.1/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no --warn=unexpected_cfgs --check-cfg 'cfg(fuzzing)' --check-cfg 'cfg(loom)' --check-cfg 'cfg(mio_unsupported_force_poll_poll)' --check-cfg 'cfg(tokio_allow_from_blocking_fd)' --check-cfg 'cfg(tokio_internal_mt_counters)' --check-cfg 'cfg(tokio_no_parking_lot)' --check-cfg 'cfg(tokio_no_tuning_tests)' --check-cfg 'cfg(tokio_taskdump)' --check-cfg 'cfg(tokio_unstable)' --check-cfg 'cfg(tokio_uring)' --check-cfg 'cfg(target_os, values("cygwin"))' --cfg 'feature="bytes"' --cfg 'feature="default"' --cfg 'feature="fs"' --cfg 'feature="io-util"' --cfg 'feature="libc"' --cfg 'feature="mio"' --cfg 'feature="net"' --cfg 'feature="rt"' --cfg 'feature="socket2"' --cfg 'feature="sync"' --cfg 'feature="time"' --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values("bytes", "default", "fs", "full", "io-std", "io-util", "libc", "macros", "mio", "net", "parking_lot", "process", "rt", "rt-multi-thread", "signal", "signal-hook-registry", "socket2", "sync", "test-util", "time", "tokio-macros", "tracing", "windows-sys"))' -C metadata=4a04e94ee27d8758 -C extra-filename=-1e87469d27791e94 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern bytes=/opt/rustwide/target/debug/deps/libbytes-e21a1ca4e0fd875c.rmeta --extern libc=/opt/rustwide/target/debug/deps/liblibc-2c240b802771c9bf.rmeta --extern mio=/opt/rustwide/target/debug/deps/libmio-d191ed32b3cb910e.rmeta --extern pin_project_lite=/opt/rustwide/target/debug/deps/libpin_project_lite-d33eaad6ea805cfb.rmeta --extern socket2=/opt/rustwide/target/debug/deps/libsocket2-ed2eed95a8c05686.rmeta --cap-lints allow --cap-lints=forbid` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "e9b186fd6f0101f9d02bc6f72d0714363e29787d77388aff151419622053d12b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e9b186fd6f0101f9d02bc6f72d0714363e29787d77388aff151419622053d12b", kill_on_drop: false }`
[INFO] [stdout] e9b186fd6f0101f9d02bc6f72d0714363e29787d77388aff151419622053d12b
