[INFO] cloning repository https://github.com/LU15W1R7H/joy
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/LU15W1R7H/joy" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLU15W1R7H%2Fjoy", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLU15W1R7H%2Fjoy'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7214191ca919c860f35f07b38bc59a1fedeba7c9
[INFO] testing LU15W1R7H/joy against beta-2022-04-10 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLU15W1R7H%2Fjoy" "/workspace/builds/worker-21/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-21/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/LU15W1R7H/joy on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/LU15W1R7H/joy
[INFO] finished tweaking git repo https://github.com/LU15W1R7H/joy
[INFO] tweaked toml for git repo https://github.com/LU15W1R7H/joy written to /workspace/builds/worker-21/source/Cargo.toml
[INFO] crate git repo https://github.com/LU15W1R7H/joy already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "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-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d32014d6cbaf38b636234f15cf046f8d9149cb6dba56ed89c41d10424bf01f1f
[INFO] running `Command { std: "docker" "start" "-a" "d32014d6cbaf38b636234f15cf046f8d9149cb6dba56ed89c41d10424bf01f1f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d32014d6cbaf38b636234f15cf046f8d9149cb6dba56ed89c41d10424bf01f1f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d32014d6cbaf38b636234f15cf046f8d9149cb6dba56ed89c41d10424bf01f1f", kill_on_drop: false }`
[INFO] [stdout] d32014d6cbaf38b636234f15cf046f8d9149cb6dba56ed89c41d10424bf01f1f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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" "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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] dc00974ae3b7c1918596b5421282896b6e718d4bbcd0576c227b8754d14c9821
[INFO] running `Command { std: "docker" "start" "-a" "dc00974ae3b7c1918596b5421282896b6e718d4bbcd0576c227b8754d14c9821", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling smart-pointers v0.1.0 (/opt/rustwide/workdir/smart-pointers)
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> smart-pointers/src/cell.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 |     pub fn new(value: T) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> smart-pointers/src/rc.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 16 |     pub fn new(v: T) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Shared`
[INFO] [stdout]  --> smart-pointers/src/refcell.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     Shared(usize),
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] note: `RefState` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]  --> smart-pointers/src/refcell.rs:4:16
[INFO] [stdout]   |
[INFO] [stdout] 4 | #[derive(Copy, Clone)]
[INFO] [stdout]   |                ^^^^^
[INFO] [stdout]   = note: this warning originates in the derive macro `Clone` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Exclusive`
[INFO] [stdout]  --> smart-pointers/src/refcell.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     Exclusive,
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] note: `RefState` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]  --> smart-pointers/src/refcell.rs:4:16
[INFO] [stdout]   |
[INFO] [stdout] 4 | #[derive(Copy, Clone)]
[INFO] [stdout]   |                ^^^^^
[INFO] [stdout]   = note: this warning originates in the derive macro `Clone` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> smart-pointers/src/refcell.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 |     pub fn new(value: T) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `borrow`
[INFO] [stdout]   --> smart-pointers/src/refcell.rs:27:12
[INFO] [stdout]    |
[INFO] [stdout] 27 |     pub fn borrow(&self) -> Option<Ref<'_, T>> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `borrow_mut`
[INFO] [stdout]   --> smart-pointers/src/refcell.rs:41:12
[INFO] [stdout]    |
[INFO] [stdout] 41 |     pub fn borrow_mut(&self) -> Option<RefMut<'_, T>> {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.29s
[INFO] running `Command { std: "docker" "inspect" "dc00974ae3b7c1918596b5421282896b6e718d4bbcd0576c227b8754d14c9821", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dc00974ae3b7c1918596b5421282896b6e718d4bbcd0576c227b8754d14c9821", kill_on_drop: false }`
[INFO] [stdout] dc00974ae3b7c1918596b5421282896b6e718d4bbcd0576c227b8754d14c9821
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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" "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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3cb09fd344082b54f15f4c4c599861bd6ab0cc8405f4727287474751af792267
[INFO] running `Command { std: "docker" "start" "-a" "3cb09fd344082b54f15f4c4c599861bd6ab0cc8405f4727287474751af792267", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling smart-pointers v0.1.0 (/opt/rustwide/workdir/smart-pointers)
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> smart-pointers/src/cell.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 |     pub fn new(value: T) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> smart-pointers/src/rc.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 16 |     pub fn new(v: T) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Shared`
[INFO] [stdout]  --> smart-pointers/src/refcell.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     Shared(usize),
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] note: `RefState` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]  --> smart-pointers/src/refcell.rs:4:16
[INFO] [stdout]   |
[INFO] [stdout] 4 | #[derive(Copy, Clone)]
[INFO] [stdout]   |                ^^^^^
[INFO] [stdout]   = note: this warning originates in the derive macro `Clone` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Exclusive`
[INFO] [stdout]  --> smart-pointers/src/refcell.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     Exclusive,
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] note: `RefState` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]  --> smart-pointers/src/refcell.rs:4:16
[INFO] [stdout]   |
[INFO] [stdout] 4 | #[derive(Copy, Clone)]
[INFO] [stdout]   |                ^^^^^
[INFO] [stdout]   = note: this warning originates in the derive macro `Clone` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> smart-pointers/src/refcell.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 |     pub fn new(value: T) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `borrow`
[INFO] [stdout]   --> smart-pointers/src/refcell.rs:27:12
[INFO] [stdout]    |
[INFO] [stdout] 27 |     pub fn borrow(&self) -> Option<Ref<'_, T>> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `borrow_mut`
[INFO] [stdout]   --> smart-pointers/src/refcell.rs:41:12
[INFO] [stdout]    |
[INFO] [stdout] 41 |     pub fn borrow_mut(&self) -> Option<RefMut<'_, T>> {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> smart-pointers/src/cell.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 |     pub fn new(value: T) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> smart-pointers/src/rc.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 16 |     pub fn new(v: T) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Shared`
[INFO] [stdout]  --> smart-pointers/src/refcell.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     Shared(usize),
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] note: `RefState` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]  --> smart-pointers/src/refcell.rs:4:16
[INFO] [stdout]   |
[INFO] [stdout] 4 | #[derive(Copy, Clone)]
[INFO] [stdout]   |                ^^^^^
[INFO] [stdout]   = note: this warning originates in the derive macro `Clone` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Exclusive`
[INFO] [stdout]  --> smart-pointers/src/refcell.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     Exclusive,
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] note: `RefState` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]  --> smart-pointers/src/refcell.rs:4:16
[INFO] [stdout]   |
[INFO] [stdout] 4 | #[derive(Copy, Clone)]
[INFO] [stdout]   |                ^^^^^
[INFO] [stdout]   = note: this warning originates in the derive macro `Clone` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> smart-pointers/src/refcell.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 |     pub fn new(value: T) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `borrow`
[INFO] [stdout]   --> smart-pointers/src/refcell.rs:27:12
[INFO] [stdout]    |
[INFO] [stdout] 27 |     pub fn borrow(&self) -> Option<Ref<'_, T>> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `borrow_mut`
[INFO] [stdout]   --> smart-pointers/src/refcell.rs:41:12
[INFO] [stdout]    |
[INFO] [stdout] 41 |     pub fn borrow_mut(&self) -> Option<RefMut<'_, T>> {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.64s
[INFO] [stderr]   Executable unittests src/lib.rs (/opt/rustwide/target/debug/deps/smart_pointers-0a2de35e5212c4ac)
[INFO] running `Command { std: "docker" "inspect" "3cb09fd344082b54f15f4c4c599861bd6ab0cc8405f4727287474751af792267", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3cb09fd344082b54f15f4c4c599861bd6ab0cc8405f4727287474751af792267", kill_on_drop: false }`
[INFO] [stdout] 3cb09fd344082b54f15f4c4c599861bd6ab0cc8405f4727287474751af792267
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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" "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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 74334a47210d2ff2119feaef8c35fb71d49e666e5ce25eefa027e23d1864e5b8
[INFO] running `Command { std: "docker" "start" "-a" "74334a47210d2ff2119feaef8c35fb71d49e666e5ce25eefa027e23d1864e5b8", 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] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> smart-pointers/src/cell.rs:11:12
[INFO] [stderr]    |
[INFO] [stderr] 11 |     pub fn new(value: T) -> Self {
[INFO] [stderr]    |            ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> smart-pointers/src/rc.rs:16:12
[INFO] [stderr]    |
[INFO] [stderr] 16 |     pub fn new(v: T) -> Self {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Shared`
[INFO] [stderr]  --> smart-pointers/src/refcell.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     Shared(usize),
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr] note: `RefState` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]  --> smart-pointers/src/refcell.rs:4:16
[INFO] [stderr]   |
[INFO] [stderr] 4 | #[derive(Copy, Clone)]
[INFO] [stderr]   |                ^^^^^
[INFO] [stderr]   = note: this warning originates in the derive macro `Clone` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Exclusive`
[INFO] [stderr]  --> smart-pointers/src/refcell.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     Exclusive,
[INFO] [stderr]   |     ^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr] note: `RefState` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]  --> smart-pointers/src/refcell.rs:4:16
[INFO] [stderr]   |
[INFO] [stderr] 4 | #[derive(Copy, Clone)]
[INFO] [stderr]   |                ^^^^^
[INFO] [stderr]   = note: this warning originates in the derive macro `Clone` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> smart-pointers/src/refcell.rs:20:12
[INFO] [stderr]    |
[INFO] [stderr] 20 |     pub fn new(value: T) -> Self {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `borrow`
[INFO] [stderr]   --> smart-pointers/src/refcell.rs:27:12
[INFO] [stderr]    |
[INFO] [stderr] 27 |     pub fn borrow(&self) -> Option<Ref<'_, T>> {
[INFO] [stderr]    |            ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `borrow_mut`
[INFO] [stderr]   --> smart-pointers/src/refcell.rs:41:12
[INFO] [stderr]    |
[INFO] [stderr] 41 |     pub fn borrow_mut(&self) -> Option<RefMut<'_, T>> {
[INFO] [stderr]    |            ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `smart-pointers` (lib) generated 7 warnings
[INFO] [stderr] warning: `smart-pointers` (lib test) generated 7 warnings (7 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.40s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/smart_pointers-0a2de35e5212c4ac)
[INFO] [stderr]    Doc-tests smart-pointers
[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] [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] running `Command { std: "docker" "inspect" "74334a47210d2ff2119feaef8c35fb71d49e666e5ce25eefa027e23d1864e5b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "74334a47210d2ff2119feaef8c35fb71d49e666e5ce25eefa027e23d1864e5b8", kill_on_drop: false }`
[INFO] [stdout] 74334a47210d2ff2119feaef8c35fb71d49e666e5ce25eefa027e23d1864e5b8