[INFO] cloning repository https://github.com/larashion/rust-learning
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/larashion/rust-learning" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flarashion%2Frust-learning", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flarashion%2Frust-learning'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bcc0d837b8df1602e4e0d1fa7eb5f74c0534e792
[INFO] testing larashion/rust-learning against 1.94.0 for beta-1.95-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flarashion%2Frust-learning" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/larashion/rust-learning
[INFO] finished tweaking git repo https://github.com/larashion/rust-learning
[INFO] tweaked toml for git repo https://github.com/larashion/rust-learning written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/larashion/rust-learning on toolchain 1.94.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.94.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/larashion/rust-learning 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" "+1.94.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded cookie_store v0.22.0
[INFO] [stderr]   Downloaded find-msvc-tools v0.1.7
[INFO] [stderr]   Downloaded time-macros v0.2.25
[INFO] [stderr]   Downloaded cc v1.2.52
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "+1.94.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a7d191017193118277f4d80f9a672ba82625264db719e055a6a9d1793c8a265b
[INFO] running `Command { std: "docker" "start" "-a" "a7d191017193118277f4d80f9a672ba82625264db719e055a6a9d1793c8a265b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a7d191017193118277f4d80f9a672ba82625264db719e055a6a9d1793c8a265b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a7d191017193118277f4d80f9a672ba82625264db719e055a6a9d1793c8a265b", kill_on_drop: false }`
[INFO] [stdout] a7d191017193118277f4d80f9a672ba82625264db719e055a6a9d1793c8a265b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+1.94.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2f3abdf571aaa29716cbf8e12b11189096196b40d4c8ac20b393d6888d750e2b
[INFO] running `Command { std: "docker" "start" "-a" "2f3abdf571aaa29716cbf8e12b11189096196b40d4c8ac20b393d6888d750e2b", kill_on_drop: false }`
[INFO] [stderr] warning: output filename collision at /opt/rustwide/target/debug/basics
[INFO] [stderr]   |
[INFO] [stderr]   = note: the bin target `basics` in package `learning-traits v0.1.0 (/opt/rustwide/workdir/traits)` has the same output filename as the bin target `basics` in package `learning-raw-pointers v0.1.0 (/opt/rustwide/workdir/raw_pointers)`
[INFO] [stderr]   = note: this may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>
[INFO] [stderr]   = help: consider changing their names to be unique or compiling them separately
[INFO] [stderr] warning: output filename collision at /opt/rustwide/target/debug/basics.dwp
[INFO] [stderr]   |
[INFO] [stderr]   = note: the bin target `basics` in package `learning-traits v0.1.0 (/opt/rustwide/workdir/traits)` has the same output filename as the bin target `basics` in package `learning-raw-pointers v0.1.0 (/opt/rustwide/workdir/raw_pointers)`
[INFO] [stderr]   = note: this may become a hard error in the future; see <https://github.com/rust-lang/cargo/issues/6313>
[INFO] [stderr]   = help: consider changing their names to be unique or compiling them separately
[INFO] [stderr]    Compiling proc-macro2 v1.0.105
[INFO] [stderr]    Compiling quote v1.0.43
[INFO] [stderr]    Compiling libc v0.2.180
[INFO] [stderr]    Compiling zerocopy v0.8.33
[INFO] [stderr]    Compiling http v1.4.0
[INFO] [stderr]    Compiling zmij v1.0.14
[INFO] [stderr]    Compiling serde_json v1.0.149
[INFO] [stderr]    Compiling find-msvc-tools v0.1.7
[INFO] [stderr]    Compiling tracing v0.1.44
[INFO] [stderr]    Compiling sync_wrapper v1.0.2
[INFO] [stderr]    Compiling time-core v0.1.7
[INFO] [stderr]    Compiling native-tls v0.2.14
[INFO] [stderr]    Compiling data-encoding v2.10.0
[INFO] [stderr]    Compiling simd-adler32 v0.3.8
[INFO] [stderr]    Compiling unicase v2.9.0
[INFO] [stderr]    Compiling deranged v0.5.5
[INFO] [stderr]    Compiling miniz_oxide v0.8.9
[INFO] [stderr]    Compiling cookie v0.18.1
[INFO] [stderr]    Compiling ipnet v2.11.0
[INFO] [stderr]    Compiling openssl-probe v0.1.6
[INFO] [stderr]    Compiling cc v1.2.52
[INFO] [stderr]    Compiling time-macros v0.2.25
[INFO] [stderr]    Compiling mime_guess v2.0.5
[INFO] [stderr]    Compiling multer v3.1.0
[INFO] [stderr]    Compiling encoding_rs v0.8.35
[INFO] [stderr]    Compiling ryu v1.0.22
[INFO] [stderr]    Compiling compression-core v0.4.31
[INFO] [stderr]    Compiling psl-types v2.0.11
[INFO] [stderr]    Compiling litrs v1.0.0
[INFO] [stderr]    Compiling http v0.2.12
[INFO] [stderr]    Compiling flate2 v1.1.8
[INFO] [stderr]    Compiling zeroize v1.8.2
[INFO] [stderr]    Compiling iri-string v0.7.10
[INFO] [stderr]    Compiling rustls-pki-types v1.13.2
[INFO] [stderr]    Compiling syn v2.0.114
[INFO] [stderr]    Compiling compression-codecs v0.4.36
[INFO] [stderr]    Compiling serde_path_to_error v0.1.20
[INFO] [stderr]    Compiling learning-file-io v0.1.0 (/opt/rustwide/workdir/file_io)
[INFO] [stderr]    Compiling http-body v1.0.1
[INFO] [stderr]    Compiling errno v0.3.14
[INFO] [stderr]    Compiling parking_lot_core v0.9.12
[INFO] [stderr]    Compiling mio v1.1.1
[INFO] [stderr]    Compiling socket2 v0.6.1
[INFO] [stderr]    Compiling getrandom v0.2.17
[INFO] [stderr]    Compiling signal-hook-registry v1.4.8
[INFO] [stderr]    Compiling http-body-util v0.1.3
[INFO] [stderr]    Compiling parking_lot v0.12.5
[INFO] [stderr]    Compiling time v0.3.45
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling document-features v0.2.12
[INFO] [stderr]    Compiling getrandom v0.3.4
[INFO] [stderr]    Compiling learning-raw-pointers v0.1.0 (/opt/rustwide/workdir/raw_pointers)
[INFO] [stderr]    Compiling rand_core v0.9.5
[INFO] [stderr]    Compiling openssl-sys v0.9.111
[INFO] [stderr]    Compiling ppv-lite86 v0.2.21
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand_chacha v0.9.0
[INFO] [stderr]    Compiling openssl v0.10.75
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling rand v0.9.2
[INFO] [stderr]    Compiling synstructure v0.13.2
[INFO] [stderr]    Compiling tokio-macros v2.6.0
[INFO] [stderr]    Compiling futures-macro v0.3.31
[INFO] [stderr]    Compiling zerofrom-derive v0.1.6
[INFO] [stderr]    Compiling yoke-derive v0.8.1
[INFO] [stderr]    Compiling zerovec-derive v0.11.2
[INFO] [stderr]    Compiling displaydoc v0.2.5
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling thiserror-impl v1.0.69
[INFO] [stderr]    Compiling openssl-macros v0.1.1
[INFO] [stderr]    Compiling async-trait v0.1.89
[INFO] [stderr]    Compiling futures-util v0.3.31
[INFO] [stderr]    Compiling tokio v1.49.0
[INFO] [stderr]    Compiling zerofrom v0.1.6
[INFO] [stderr]    Compiling yoke v0.8.1
[INFO] [stderr]    Compiling thiserror v1.0.69
[INFO] [stderr]    Compiling tungstenite v0.24.0
[INFO] [stderr]    Compiling zerovec v0.11.5
[INFO] [stderr]    Compiling zerotrie v0.2.3
[INFO] [stderr]    Compiling learning-error-handling v0.1.0 (/opt/rustwide/workdir/error_handling)
[INFO] [stderr]    Compiling tinystr v0.8.2
[INFO] [stderr]    Compiling potential_utf v0.1.4
[INFO] [stderr]    Compiling icu_collections v2.1.1
[INFO] [stderr]    Compiling icu_locale_core v2.1.1
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling icu_provider v2.1.1
[INFO] [stderr]    Compiling icu_properties v2.1.2
[INFO] [stderr]    Compiling icu_normalizer v2.1.1
[INFO] [stderr]    Compiling serde_urlencoded v0.7.1
[INFO] [stderr]    Compiling learning-smart-pointers v0.1.0 (/opt/rustwide/workdir/smart_pointers)
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]   --> smart_pointers/src/bin/ptr_box.rs:38:10
[INFO] [stdout]    |
[INFO] [stdout] 38 |     Cons(i32, Box<List>),
[INFO] [stdout]    |     ---- ^^^  ^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     fields in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `List` 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 fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]    |
[INFO] [stdout] 38 -     Cons(i32, Box<List>),
[INFO] [stdout] 38 +     Cons((), ()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `value` is never read
[INFO] [stdout]   --> smart_pointers/src/bin/ptr_rc.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | struct Data {
[INFO] [stdout]    |        ---- field in this struct
[INFO] [stdout] 20 |     value: i32,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Data` 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] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `value` is never read
[INFO] [stdout]    --> smart_pointers/src/bin/ptr_rc.rs:151:5
[INFO] [stdout]     |
[INFO] [stdout] 150 | struct CycleNode {
[INFO] [stdout]     |        --------- field in this struct
[INFO] [stdout] 151 |     value: i32,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Printable` is never used
[INFO] [stdout]    --> smart_pointers/src/bin/ptr_dyn.rs:135:11
[INFO] [stdout]     |
[INFO] [stdout] 135 |     trait Printable {
[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 `Display` is never used
[INFO] [stdout]    --> smart_pointers/src/bin/ptr_dyn.rs:140:11
[INFO] [stdout]     |
[INFO] [stdout] 140 |     trait Display {
[INFO] [stdout]     |           ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Cloneable` is never used
[INFO] [stdout]    --> smart_pointers/src/bin/ptr_dyn.rs:145:11
[INFO] [stdout]     |
[INFO] [stdout] 145 |     trait Cloneable {
[INFO] [stdout]     |           ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `GenericMethod` is never used
[INFO] [stdout]    --> smart_pointers/src/bin/ptr_dyn.rs:150:11
[INFO] [stdout]     |
[INFO] [stdout] 150 |     trait GenericMethod {
[INFO] [stdout]     |           ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `value` is never read
[INFO] [stdout]    --> smart_pointers/src/bin/ptr_dyn.rs:592:5
[INFO] [stdout]     |
[INFO] [stdout] 591 | struct Data {
[INFO] [stdout]     |        ---- field in this struct
[INFO] [stdout] 592 |     value: i32,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Data` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `value` is never read
[INFO] [stdout]    --> smart_pointers/src/bin/ptr_weak.rs:106:5
[INFO] [stdout]     |
[INFO] [stdout] 105 | struct CycleNode {
[INFO] [stdout]     |        --------- field in this struct
[INFO] [stdout] 106 |     value: i32,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling axum-core v0.4.5
[INFO] [stderr]    Compiling tokio-util v0.7.18
[INFO] [stderr]    Compiling tower v0.5.3
[INFO] [stderr]    Compiling tokio-native-tls v0.3.1
[INFO] [stderr]    Compiling async-compression v0.4.37
[INFO] [stderr]    Compiling tokio-tungstenite v0.24.0
[INFO] [stderr]    Compiling tokio-stream v0.1.18
[INFO] [stderr]    Compiling learning-concurrency v0.1.0 (/opt/rustwide/workdir/concurrency)
[INFO] [stderr]    Compiling learning-traits v0.1.0 (/opt/rustwide/workdir/traits)
[INFO] [stderr]    Compiling idna_adapter v1.2.1
[INFO] [stderr]    Compiling idna v1.1.0
[INFO] [stderr]    Compiling tower-http v0.6.8
[INFO] [stderr]    Compiling url v2.5.8
[INFO] [stderr]    Compiling publicsuffix v2.3.0
[INFO] [stderr]    Compiling h2 v0.4.13
[INFO] [stderr]    Compiling tower-http v0.5.2
[INFO] [stderr]    Compiling tungstenite v0.20.1
[INFO] [stderr]    Compiling cookie_store v0.22.0
[INFO] [stdout] warning: trait `MyDisplay` is never used
[INFO] [stdout]   --> traits/src/bin/generics.rs:48:7
[INFO] [stdout]    |
[INFO] [stdout] 48 | trait MyDisplay {
[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 `MyDebug` is never used
[INFO] [stdout]   --> traits/src/bin/generics.rs:51:7
[INFO] [stdout]    |
[INFO] [stdout] 51 | trait MyDebug {
[INFO] [stdout]    |       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MyStruct` is never constructed
[INFO] [stdout]    --> traits/src/bin/generics.rs:138:8
[INFO] [stdout]     |
[INFO] [stdout] 138 | struct MyStruct<T> {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling tokio-tungstenite v0.20.1
[INFO] [stderr]    Compiling hyper v1.8.1
[INFO] [stderr]    Compiling hyper-util v0.1.19
[INFO] [stderr]    Compiling hyper-tls v0.6.0
[INFO] [stderr]    Compiling axum v0.7.9
[INFO] [stderr]    Compiling reqwest v0.12.28
[INFO] [stderr]    Compiling learning-networking v0.1.0 (/opt/rustwide/workdir/networking)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1m 27s
[INFO] running `Command { std: "docker" "inspect" "2f3abdf571aaa29716cbf8e12b11189096196b40d4c8ac20b393d6888d750e2b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2f3abdf571aaa29716cbf8e12b11189096196b40d4c8ac20b393d6888d750e2b", kill_on_drop: false }`
[INFO] [stdout] 2f3abdf571aaa29716cbf8e12b11189096196b40d4c8ac20b393d6888d750e2b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+1.94.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4e9d805cce23cbb20de9df2fc155849edd8d613e9af443aa4b5ffcda79ad0d00
[INFO] running `Command { std: "docker" "start" "-a" "4e9d805cce23cbb20de9df2fc155849edd8d613e9af443aa4b5ffcda79ad0d00", kill_on_drop: false }`
[INFO] [stderr]    Compiling learning-smart-pointers v0.1.0 (/opt/rustwide/workdir/smart_pointers)
[INFO] [stderr]    Compiling learning-concurrency v0.1.0 (/opt/rustwide/workdir/concurrency)
[INFO] [stderr]    Compiling learning-file-io v0.1.0 (/opt/rustwide/workdir/file_io)
[INFO] [stderr]    Compiling learning-networking v0.1.0 (/opt/rustwide/workdir/networking)
[INFO] [stderr]    Compiling learning-traits v0.1.0 (/opt/rustwide/workdir/traits)
[INFO] [stdout] warning: trait `MyDisplay` is never used
[INFO] [stdout]   --> traits/src/bin/generics.rs:48:7
[INFO] [stdout]    |
[INFO] [stdout] 48 | trait MyDisplay {
[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 `MyDebug` is never used
[INFO] [stdout]   --> traits/src/bin/generics.rs:51:7
[INFO] [stdout]    |
[INFO] [stdout] 51 | trait MyDebug {
[INFO] [stdout]    |       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MyStruct` is never constructed
[INFO] [stdout]    --> traits/src/bin/generics.rs:138:8
[INFO] [stdout]     |
[INFO] [stdout] 138 | struct MyStruct<T> {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling learning-error-handling v0.1.0 (/opt/rustwide/workdir/error_handling)
[INFO] [stdout] warning: field `value` is never read
[INFO] [stdout]   --> smart_pointers/src/bin/ptr_rc.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | struct Data {
[INFO] [stdout]    |        ---- field in this struct
[INFO] [stdout] 20 |     value: i32,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Data` 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] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `value` is never read
[INFO] [stdout]    --> smart_pointers/src/bin/ptr_rc.rs:151:5
[INFO] [stdout]     |
[INFO] [stdout] 150 | struct CycleNode {
[INFO] [stdout]     |        --------- field in this struct
[INFO] [stdout] 151 |     value: i32,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]   --> smart_pointers/src/bin/ptr_box.rs:38:10
[INFO] [stdout]    |
[INFO] [stdout] 38 |     Cons(i32, Box<List>),
[INFO] [stdout]    |     ---- ^^^  ^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     fields in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `List` 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 fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]    |
[INFO] [stdout] 38 -     Cons(i32, Box<List>),
[INFO] [stdout] 38 +     Cons((), ()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling learning-raw-pointers v0.1.0 (/opt/rustwide/workdir/raw_pointers)
[INFO] [stdout] warning: field `value` is never read
[INFO] [stdout]    --> smart_pointers/src/bin/ptr_weak.rs:106:5
[INFO] [stdout]     |
[INFO] [stdout] 105 | struct CycleNode {
[INFO] [stdout]     |        --------- field in this struct
[INFO] [stdout] 106 |     value: i32,
[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 `Printable` is never used
[INFO] [stdout]    --> smart_pointers/src/bin/ptr_dyn.rs:135:11
[INFO] [stdout]     |
[INFO] [stdout] 135 |     trait Printable {
[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 `Display` is never used
[INFO] [stdout]    --> smart_pointers/src/bin/ptr_dyn.rs:140:11
[INFO] [stdout]     |
[INFO] [stdout] 140 |     trait Display {
[INFO] [stdout]     |           ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Cloneable` is never used
[INFO] [stdout]    --> smart_pointers/src/bin/ptr_dyn.rs:145:11
[INFO] [stdout]     |
[INFO] [stdout] 145 |     trait Cloneable {
[INFO] [stdout]     |           ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `GenericMethod` is never used
[INFO] [stdout]    --> smart_pointers/src/bin/ptr_dyn.rs:150:11
[INFO] [stdout]     |
[INFO] [stdout] 150 |     trait GenericMethod {
[INFO] [stdout]     |           ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `value` is never read
[INFO] [stdout]    --> smart_pointers/src/bin/ptr_dyn.rs:592:5
[INFO] [stdout]     |
[INFO] [stdout] 591 | struct Data {
[INFO] [stdout]     |        ---- field in this struct
[INFO] [stdout] 592 |     value: i32,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Data` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 7.60s
[INFO] running `Command { std: "docker" "inspect" "4e9d805cce23cbb20de9df2fc155849edd8d613e9af443aa4b5ffcda79ad0d00", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4e9d805cce23cbb20de9df2fc155849edd8d613e9af443aa4b5ffcda79ad0d00", kill_on_drop: false }`
[INFO] [stdout] 4e9d805cce23cbb20de9df2fc155849edd8d613e9af443aa4b5ffcda79ad0d00
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+1.94.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 05254626a255c034a04517b71d1cf8c893159ae3e7fcbeba199b3845a6c1d72c
[INFO] running `Command { std: "docker" "start" "-a" "05254626a255c034a04517b71d1cf8c893159ae3e7fcbeba199b3845a6c1d72c", kill_on_drop: false }`
[INFO] [stderr] warning: field `value` is never read
[INFO] [stderr]   --> smart_pointers/src/bin/ptr_rc.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 19 | struct Data {
[INFO] [stderr]    |        ---- field in this struct
[INFO] [stderr] 20 |     value: i32,
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `Data` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field `value` is never read
[INFO] [stderr]    --> smart_pointers/src/bin/ptr_rc.rs:151:5
[INFO] [stderr]     |
[INFO] [stderr] 150 | struct CycleNode {
[INFO] [stderr]     |        --------- field in this struct
[INFO] [stderr] 151 |     value: i32,
[INFO] [stderr]     |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait `Printable` is never used
[INFO] [stderr]    --> smart_pointers/src/bin/ptr_dyn.rs:135:11
[INFO] [stderr]     |
[INFO] [stderr] 135 |     trait Printable {
[INFO] [stderr]     |           ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait `Display` is never used
[INFO] [stderr]    --> smart_pointers/src/bin/ptr_dyn.rs:140:11
[INFO] [stderr]     |
[INFO] [stderr] 140 |     trait Display {
[INFO] [stderr]     |           ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait `Cloneable` is never used
[INFO] [stderr]    --> smart_pointers/src/bin/ptr_dyn.rs:145:11
[INFO] [stderr]     |
[INFO] [stderr] 145 |     trait Cloneable {
[INFO] [stderr]     |           ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait `GenericMethod` is never used
[INFO] [stderr]    --> smart_pointers/src/bin/ptr_dyn.rs:150:11
[INFO] [stderr]     |
[INFO] [stderr] 150 |     trait GenericMethod {
[INFO] [stderr]     |           ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field `value` is never read
[INFO] [stderr]    --> smart_pointers/src/bin/ptr_dyn.rs:592:5
[INFO] [stderr]     |
[INFO] [stderr] 591 | struct Data {
[INFO] [stderr]     |        ---- field in this struct
[INFO] [stderr] 592 |     value: i32,
[INFO] [stderr]     |     ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `Data` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: field `value` is never read
[INFO] [stderr]    --> smart_pointers/src/bin/ptr_weak.rs:106:5
[INFO] [stderr]     |
[INFO] [stderr] 105 | struct CycleNode {
[INFO] [stderr]     |        --------- field in this struct
[INFO] [stderr] 106 |     value: i32,
[INFO] [stderr]     |     ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `learning-smart-pointers` (bin "ptr_rc" test) generated 2 warnings
[INFO] [stderr] warning: `learning-smart-pointers` (bin "ptr_dyn" test) generated 5 warnings
[INFO] [stderr] warning: `learning-smart-pointers` (bin "ptr_weak" test) generated 1 warning
[INFO] [stderr] warning: fields `0` and `1` are never read
[INFO] [stderr]   --> smart_pointers/src/bin/ptr_box.rs:38:10
[INFO] [stderr]    |
[INFO] [stderr] 38 |     Cons(i32, Box<List>),
[INFO] [stderr]    |     ---- ^^^  ^^^^^^^^^
[INFO] [stderr]    |     |
[INFO] [stderr]    |     fields in this variant
[INFO] [stderr]    |
[INFO] [stderr]    = note: `List` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stderr]    |
[INFO] [stderr] 38 -     Cons(i32, Box<List>),
[INFO] [stderr] 38 +     Cons((), ()),
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: `learning-smart-pointers` (bin "ptr_box" test) generated 1 warning
[INFO] [stderr] warning: trait `MyDisplay` is never used
[INFO] [stderr]   --> traits/src/bin/generics.rs:48:7
[INFO] [stderr]    |
[INFO] [stderr] 48 | trait MyDisplay {
[INFO] [stderr]    |       ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait `MyDebug` is never used
[INFO] [stderr]   --> traits/src/bin/generics.rs:51:7
[INFO] [stderr]    |
[INFO] [stderr] 51 | trait MyDebug {
[INFO] [stderr]    |       ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `MyStruct` is never constructed
[INFO] [stderr]    --> traits/src/bin/generics.rs:138:8
[INFO] [stderr]     |
[INFO] [stderr] 138 | struct MyStruct<T> {
[INFO] [stderr]     |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `learning-traits` (bin "generics" test) generated 3 warnings
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.55s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/learning_concurrency-b415ff24af4a110a)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/atomic_arc.rs (/opt/rustwide/target/debug/deps/atomic_arc-b15c4b0fd092b396)
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test tests::test_arc_drop_behavior ... ok
[INFO] [stdout] test tests::test_arc_multithreaded ... ok
[INFO] [stdout] test tests::test_arc_basic ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/atomic_condvar.rs (/opt/rustwide/target/debug/deps/atomic_condvar-45e9cfb1404daee5)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test tests::test_condvar_notification ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/atomic_counter.rs (/opt/rustwide/target/debug/deps/atomic_counter-ad2261ed275373c7)
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test tests::test_atomic_counter_zero_threads ... ok
[INFO] [stdout] test tests::test_atomic_counter_large ... ok
[INFO] [stdout] test tests::test_atomic_counter_basic ... ok
[INFO] [stdout] test tests::test_atomic_counter_zero_increments ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/atomic_spinlock.rs (/opt/rustwide/target/debug/deps/atomic_spinlock-182f0d9291f972d2)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test tests::test_spinlock ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/channel_basic.rs (/opt/rustwide/target/debug/deps/channel_basic-8f0c2033519168f1)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/channel_enum.rs (/opt/rustwide/target/debug/deps/channel_enum-558b03199473ee08)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/channel_multi_producer.rs (/opt/rustwide/target/debug/deps/channel_multi_producer-60052b0953982901)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/channel_sync.rs (/opt/rustwide/target/debug/deps/channel_sync-4efdc4a20f96731b)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/channel_try_and_timeout.rs (/opt/rustwide/target/debug/deps/channel_try_and_timeout-5478df0e72ad9de7)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/mutex_arc.rs (/opt/rustwide/target/debug/deps/mutex_arc-e17c49adf92c52f4)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/mutex_basic.rs (/opt/rustwide/target/debug/deps/mutex_basic-0089fcbbd1cbb72d)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/mutex_wrapper.rs (/opt/rustwide/target/debug/deps/mutex_wrapper-ae518f8794385e20)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/rwlock_performance.rs (/opt/rustwide/target/debug/deps/rwlock_performance-1431e124d0ea3b81)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/rwlock_struct.rs (/opt/rustwide/target/debug/deps/rwlock_struct-58ce3b92412c56b0)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/send_sync_bounds_checks.rs (/opt/rustwide/target/debug/deps/send_sync_bounds_checks-6108baec2591b18f)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/thread_threadlocal.rs (/opt/rustwide/target/debug/deps/thread_threadlocal-55f13af20e3b17d4)
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/error_ecosystem.rs (/opt/rustwide/target/debug/deps/error_ecosystem-abb8640a7cabde66)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/error_std_basics.rs (/opt/rustwide/target/debug/deps/error_std_basics-98dd9b1093755acb)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr]      Running unittests src/bin/cleaner.rs (/opt/rustwide/target/debug/deps/cleaner-ce23a9d97dc33b59)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test tests::test_clean_empty_dirs_logic ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `-p learning-file-io --bin cleaner`
[INFO] [stdout] ---- tests::test_clean_empty_dirs_logic stdout ----
[INFO] [stdout] 
[INFO] [stdout] thread 'tests::test_clean_empty_dirs_logic' (99) panicked at file_io/src/bin/cleaner.rs:68:75:
[INFO] [stdout] called `Result::unwrap()` on an `Err` value: Os { code: 30, kind: ReadOnlyFilesystem, message: "Read-only file system" }
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x5d7a6b4c7a02 - std::backtrace_rs::backtrace::libunwind::trace::hff358a60abf734fc
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stdout]    1:     0x5d7a6b4c7a02 - std::backtrace_rs::backtrace::trace_unsynchronized::h3b121f916dd95ec6
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stdout]    2:     0x5d7a6b4c7a02 - std::sys::backtrace::_print_fmt::hde0a62ded68798e9
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/sys/backtrace.rs:74:9
[INFO] [stdout]    3:     0x5d7a6b4c7a02 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h93773fc827e3113d
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/sys/backtrace.rs:44:26
[INFO] [stdout]    4:     0x5d7a6b4d7bba - core::fmt::rt::Argument::fmt::h01eff69902dad97f
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/core/src/fmt/rt.rs:152:76
[INFO] [stdout]    5:     0x5d7a6b4d7bba - core::fmt::write::hed7b5c73d82ecb7c
[INFO] [stdout]    6:     0x5d7a6b495406 - std::io::default_write_fmt::h2f696ff5b8bbaa4b
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/io/mod.rs:639:11
[INFO] [stdout]    7:     0x5d7a6b495406 - std::io::Write::write_fmt::h5e66814db8a9cfce
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/io/mod.rs:1994:13
[INFO] [stdout]    8:     0x5d7a6b4a6a09 - std::sys::backtrace::BacktraceLock::print::h8b1d6fcc5a56d1a3
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/sys/backtrace.rs:47:9
[INFO] [stdout]    9:     0x5d7a6b4a6a09 - std::panicking::default_hook::{{closure}}::h2be84df4f189ae36
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/panicking.rs:292:27
[INFO] [stdout]   10:     0x5d7a6b4a68a1 - std::panicking::default_hook::hf0ea8939246f43a9
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/panicking.rs:316:9
[INFO] [stdout]   11:     0x5d7a6b458e1e - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h02d35e3888986252
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/alloc/src/boxed.rs:2220:9
[INFO] [stdout]   12:     0x5d7a6b458e1e - test::test_main_with_exit_callback::{{closure}}::h939640a27d647173
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/test/src/lib.rs:145:21
[INFO] [stdout]   13:     0x5d7a6b4a6c82 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hc9df09ff391af3e7
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/alloc/src/boxed.rs:2220:9
[INFO] [stdout]   14:     0x5d7a6b4a6c82 - std::panicking::panic_with_hook::hb4bd9ac1123582a0
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/panicking.rs:833:13
[INFO] [stdout]   15:     0x5d7a6b4a6ac8 - std::panicking::panic_handler::{{closure}}::hde00dd15f5637fe2
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/panicking.rs:698:13
[INFO] [stdout]   16:     0x5d7a6b4a1e39 - std::sys::backtrace::__rust_end_short_backtrace::hb72197fa777c1785
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/sys/backtrace.rs:182:18
[INFO] [stdout]   17:     0x5d7a6b48970d - __rustc[4425a7e20b4c8619]::rust_begin_unwind
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/panicking.rs:689:5
[INFO] [stdout]   18:     0x5d7a6b4def2c - core::panicking::panic_fmt::ha59b517dd231f4da
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/core/src/panicking.rs:80:14
[INFO] [stdout]   19:     0x5d7a6b4de842 - core::result::unwrap_failed::hf2d1f30a3ac850fc
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/core/src/result.rs:1867:5
[INFO] [stdout]   20:     0x5d7a6b438d66 - core::result::Result<T,E>::unwrap::he0c3ac748f0e0249
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/core/src/result.rs:1233:23
[INFO] [stdout]   21:     0x5d7a6b438d66 - cleaner::tests::setup_test_environment::h2dcbc4fa3cb52725
[INFO] [stdout]                                at /opt/rustwide/workdir/file_io/src/bin/cleaner.rs:68:75
[INFO] [stdout]   22:     0x5d7a6b4394ac - cleaner::tests::test_clean_empty_dirs_logic::he31143824c3a067b
[INFO] [stdout]                                at /opt/rustwide/workdir/file_io/src/bin/cleaner.rs:83:9
[INFO] [stdout]   23:     0x5d7a6b439df7 - cleaner::tests::test_clean_empty_dirs_logic::{{closure}}::h0bfa1c99dc493497
[INFO] [stdout]                                at /opt/rustwide/workdir/file_io/src/bin/cleaner.rs:81:37
[INFO] [stdout]   24:     0x5d7a6b436d16 - core::ops::function::FnOnce::call_once::h8d68bfbff7fa4691
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   25:     0x5d7a6b458bdb - core::ops::function::FnOnce::call_once::hddb3cd395c36bfbb
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   26:     0x5d7a6b458bdb - test::__rust_begin_short_backtrace::h0b6a7601d9750bfa
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/test/src/lib.rs:663:18
[INFO] [stdout]   27:     0x5d7a6b46c5ea - test::run_test_in_process::{{closure}}::h444209903f00b347
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/test/src/lib.rs:686:74
[INFO] [stdout]   28:     0x5d7a6b46c5ea - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hfb3ba8f46e537649
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/core/src/panic/unwind_safe.rs:274:9
[INFO] [stdout]   29:     0x5d7a6b46c5ea - std::panicking::catch_unwind::do_call::h1672a45911fcf9dc
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/panicking.rs:581:40
[INFO] [stdout]   30:     0x5d7a6b46c5ea - std::panicking::catch_unwind::h0fadaee22787a6dd
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/panicking.rs:544:19
[INFO] [stdout]   31:     0x5d7a6b46c5ea - std::panic::catch_unwind::hc47ad190f2c8e188
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/panic.rs:359:14
[INFO] [stdout]   32:     0x5d7a6b46c5ea - test::run_test_in_process::hcd7faaf934f29999
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/test/src/lib.rs:686:27
[INFO] [stdout]   33:     0x5d7a6b46c5ea - test::run_test::{{closure}}::hddc4550da4871867
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/test/src/lib.rs:607:43
[INFO] [stdout]   34:     0x5d7a6b446a44 - test::run_test::{{closure}}::h98ae26689f13ed94
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/test/src/lib.rs:637:41
[INFO] [stdout]   35:     0x5d7a6b446a44 - std::sys::backtrace::__rust_begin_short_backtrace::h3ec4d1f21ad44588
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/sys/backtrace.rs:166:18
[INFO] [stdout]   36:     0x5d7a6b44a3e2 - std::thread::lifecycle::spawn_unchecked::{{closure}}::{{closure}}::hd8bf2c73d479939f
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/thread/lifecycle.rs:91:13
[INFO] [stdout]   37:     0x5d7a6b44a3e2 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h3b4248f358af2491
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/core/src/panic/unwind_safe.rs:274:9
[INFO] [stdout]   38:     0x5d7a6b44a3e2 - std::panicking::catch_unwind::do_call::hda10a64f4b8daebe
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/panicking.rs:581:40
[INFO] [stdout]   39:     0x5d7a6b44a3e2 - std::panicking::catch_unwind::h659e5ee8336ec8c7
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/panicking.rs:544:19
[INFO] [stdout]   40:     0x5d7a6b44a3e2 - std::panic::catch_unwind::h9d4d66a538912c18
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/panic.rs:359:14
[INFO] [stdout]   41:     0x5d7a6b44a3e2 - std::thread::lifecycle::spawn_unchecked::{{closure}}::h7557906bb51d79f1
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/thread/lifecycle.rs:89:26
[INFO] [stdout]   42:     0x5d7a6b44a3e2 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h9e460d1d7fc83d35
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   43:     0x5d7a6b49cf8f - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h61282da819d64ea9
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/alloc/src/boxed.rs:2206:9
[INFO] [stdout]   44:     0x5d7a6b49cf8f - std::sys::thread::unix::Thread::new::thread_start::h982f9ea829d1b5fb
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/sys/thread/unix.rs:127:17
[INFO] [stdout]   45:     0x7241e68d9aa4 - <unknown>
[INFO] [stdout]   46:     0x7241e6966a64 - clone
[INFO] [stdout]   47:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     tests::test_clean_empty_dirs_logic
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.03s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "05254626a255c034a04517b71d1cf8c893159ae3e7fcbeba199b3845a6c1d72c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "05254626a255c034a04517b71d1cf8c893159ae3e7fcbeba199b3845a6c1d72c", kill_on_drop: false }`
[INFO] [stdout] 05254626a255c034a04517b71d1cf8c893159ae3e7fcbeba199b3845a6c1d72c
