[INFO] cloning repository https://github.com/htlsne/library-checker-answers
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/htlsne/library-checker-answers" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhtlsne%2Flibrary-checker-answers", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhtlsne%2Flibrary-checker-answers'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] de084aa31e58cb04a3570ce0777a712fb9ff6779
[INFO] checking htlsne/library-checker-answers against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhtlsne%2Flibrary-checker-answers" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/htlsne/library-checker-answers on toolchain 1f12b9b0fdbe735968ac002792a720f0ba4faca6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/htlsne/library-checker-answers
[INFO] finished tweaking git repo https://github.com/htlsne/library-checker-answers
[INFO] tweaked toml for git repo https://github.com/htlsne/library-checker-answers written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/htlsne/library-checker-answers 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" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 41b91444c4e98f41cb11c172e15ea91ec9e1944e9022bfad65137622561bc229
[INFO] running `Command { std: "docker" "start" "-a" "41b91444c4e98f41cb11c172e15ea91ec9e1944e9022bfad65137622561bc229", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "41b91444c4e98f41cb11c172e15ea91ec9e1944e9022bfad65137622561bc229", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "41b91444c4e98f41cb11c172e15ea91ec9e1944e9022bfad65137622561bc229", kill_on_drop: false }`
[INFO] [stdout] 41b91444c4e98f41cb11c172e15ea91ec9e1944e9022bfad65137622561bc229
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b856c09d163423a10be06895868f14196acd1f9e431ab12ccdb10b180de280b9
[INFO] running `Command { std: "docker" "start" "-a" "b856c09d163423a10be06895868f14196acd1f9e431ab12ccdb10b180de280b9", kill_on_drop: false }`
[INFO] [stderr]     Checking library-checker-answers v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: methods `next_vec` and `chars` are never used
[INFO] [stdout]   --> src/bin/many_aplusb.rs:42:16
[INFO] [stdout]    |
[INFO] [stdout] 27 |     impl<'a> Scanner<'a> {
[INFO] [stdout]    |     -------------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 42 |         pub fn next_vec<T>(&mut self, n: usize) -> Vec<T>
[INFO] [stdout]    |                ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 54 |         pub fn chars(&mut self) -> Vec<char> {
[INFO] [stdout]    |                ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `next_vec` and `chars` are never used
[INFO] [stdout]   --> src/bin/many_aplusb.rs:42:16
[INFO] [stdout]    |
[INFO] [stdout] 27 |     impl<'a> Scanner<'a> {
[INFO] [stdout]    |     -------------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 42 |         pub fn next_vec<T>(&mut self, n: usize) -> Vec<T>
[INFO] [stdout]    |                ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 54 |         pub fn chars(&mut self) -> Vec<char> {
[INFO] [stdout]    |                ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `next_vec` and `chars` are never used
[INFO] [stdout]   --> src/bin/associative_array.rs:57:16
[INFO] [stdout]    |
[INFO] [stdout] 42 |     impl<'a> Scanner<'a> {
[INFO] [stdout]    |     -------------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 57 |         pub fn next_vec<T>(&mut self, n: usize) -> Vec<T>
[INFO] [stdout]    |                ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 69 |         pub fn chars(&mut self) -> Vec<char> {
[INFO] [stdout]    |                ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `next_vec` and `chars` are never used
[INFO] [stdout]   --> src/bin/associative_array.rs:57:16
[INFO] [stdout]    |
[INFO] [stdout] 42 |     impl<'a> Scanner<'a> {
[INFO] [stdout]    |     -------------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 57 |         pub fn next_vec<T>(&mut self, n: usize) -> Vec<T>
[INFO] [stdout]    |                ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 69 |         pub fn chars(&mut self) -> Vec<char> {
[INFO] [stdout]    |                ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/bin/template.rs:62:17
[INFO] [stdout]    |
[INFO] [stdout] 62 |             let $single_tt_pat = $crate::read!(from $scanner { $readable });
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/bin/template.rs:62:17
[INFO] [stdout]    |
[INFO] [stdout] 62 |             let $single_tt_pat = $crate::read!(from $scanner { $readable });
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `usize1` is never used
[INFO] [stdout]    --> src/bin/template.rs:115:12
[INFO] [stdout]     |
[INFO] [stdout] 115 |     pub fn usize1(n: usize) -> usize {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `bytes` is never used
[INFO] [stdout]    --> src/bin/template.rs:120:12
[INFO] [stdout]     |
[INFO] [stdout] 120 |     pub fn bytes(s: String) -> Vec<u8> {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `call_once_from_reader` is never used
[INFO] [stdout]    --> src/bin/template.rs:127:12
[INFO] [stdout]     |
[INFO] [stdout] 125 |     pub trait FnOnceExt<A> {
[INFO] [stdout]     |               --------- associated function in this trait
[INFO] [stdout] 126 |         type Output;
[INFO] [stdout] 127 |         fn call_once_from_reader(this: Self, scanner: &mut Scanner) -> Self::Output;
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `usize1` is never used
[INFO] [stdout]    --> src/bin/template.rs:115:12
[INFO] [stdout]     |
[INFO] [stdout] 115 |     pub fn usize1(n: usize) -> usize {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `bytes` is never used
[INFO] [stdout]    --> src/bin/template.rs:120:12
[INFO] [stdout]     |
[INFO] [stdout] 120 |     pub fn bytes(s: String) -> Vec<u8> {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `call_once_from_reader` is never used
[INFO] [stdout]    --> src/bin/template.rs:127:12
[INFO] [stdout]     |
[INFO] [stdout] 125 |     pub trait FnOnceExt<A> {
[INFO] [stdout]     |               --------- associated function in this trait
[INFO] [stdout] 126 |         type Output;
[INFO] [stdout] 127 |         fn call_once_from_reader(this: Self, scanner: &mut Scanner) -> Self::Output;
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `usize1` is never used
[INFO] [stdout]    --> src/bin/unionfind.rs:222:12
[INFO] [stdout]     |
[INFO] [stdout] 222 |     pub fn usize1(n: usize) -> usize {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `bytes` is never used
[INFO] [stdout]    --> src/bin/unionfind.rs:227:12
[INFO] [stdout]     |
[INFO] [stdout] 227 |     pub fn bytes(s: String) -> Vec<u8> {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `call_once_from_reader` is never used
[INFO] [stdout]    --> src/bin/unionfind.rs:234:12
[INFO] [stdout]     |
[INFO] [stdout] 232 |     pub trait FnOnceExt<A> {
[INFO] [stdout]     |               --------- associated function in this trait
[INFO] [stdout] 233 |         type Output;
[INFO] [stdout] 234 |         fn call_once_from_reader(this: Self, scanner: &mut Scanner) -> Self::Output;
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `usize1` is never used
[INFO] [stdout]    --> src/bin/unionfind.rs:222:12
[INFO] [stdout]     |
[INFO] [stdout] 222 |     pub fn usize1(n: usize) -> usize {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `bytes` is never used
[INFO] [stdout]    --> src/bin/unionfind.rs:227:12
[INFO] [stdout]     |
[INFO] [stdout] 227 |     pub fn bytes(s: String) -> Vec<u8> {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `call_once_from_reader` is never used
[INFO] [stdout]    --> src/bin/unionfind.rs:234:12
[INFO] [stdout]     |
[INFO] [stdout] 232 |     pub trait FnOnceExt<A> {
[INFO] [stdout]     |               --------- associated function in this trait
[INFO] [stdout] 233 |         type Output;
[INFO] [stdout] 234 |         fn call_once_from_reader(this: Self, scanner: &mut Scanner) -> Self::Output;
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.07s
[INFO] running `Command { std: "docker" "inspect" "b856c09d163423a10be06895868f14196acd1f9e431ab12ccdb10b180de280b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b856c09d163423a10be06895868f14196acd1f9e431ab12ccdb10b180de280b9", kill_on_drop: false }`
[INFO] [stdout] b856c09d163423a10be06895868f14196acd1f9e431ab12ccdb10b180de280b9
[INFO] checking htlsne/library-checker-answers against try#f9935d29d867449445ee008640ccca1bf1ae0889+rustflags=-Dtail_expr_drop_order for crater-rollup-uwu
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhtlsne%2Flibrary-checker-answers" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/htlsne/library-checker-answers on toolchain f9935d29d867449445ee008640ccca1bf1ae0889
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f9935d29d867449445ee008640ccca1bf1ae0889" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/htlsne/library-checker-answers
[INFO] finished tweaking git repo https://github.com/htlsne/library-checker-answers
[INFO] tweaked toml for git repo https://github.com/htlsne/library-checker-answers written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/htlsne/library-checker-answers 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" "+f9935d29d867449445ee008640ccca1bf1ae0889" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+f9935d29d867449445ee008640ccca1bf1ae0889" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1b50849b43ea7f0c8deace079d9c448bf2232914e9cbb3869f76e0b5bf435077
[INFO] running `Command { std: "docker" "start" "-a" "1b50849b43ea7f0c8deace079d9c448bf2232914e9cbb3869f76e0b5bf435077", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1b50849b43ea7f0c8deace079d9c448bf2232914e9cbb3869f76e0b5bf435077", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1b50849b43ea7f0c8deace079d9c448bf2232914e9cbb3869f76e0b5bf435077", kill_on_drop: false }`
[INFO] [stdout] 1b50849b43ea7f0c8deace079d9c448bf2232914e9cbb3869f76e0b5bf435077
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid -Dtail_expr_drop_order" "-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+f9935d29d867449445ee008640ccca1bf1ae0889" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c9a8154b176a92f156e76b860a95c3e081d499478587d706439f97dae9e199b6
[INFO] running `Command { std: "docker" "start" "-a" "c9a8154b176a92f156e76b860a95c3e081d499478587d706439f97dae9e199b6", kill_on_drop: false }`
[INFO] [stderr]     Checking library-checker-answers v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: methods `next_vec` and `chars` are never used
[INFO] [stdout]   --> src/bin/many_aplusb.rs:42:16
[INFO] [stdout]    |
[INFO] [stdout] 27 |     impl<'a> Scanner<'a> {
[INFO] [stdout]    |     -------------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 42 |         pub fn next_vec<T>(&mut self, n: usize) -> Vec<T>
[INFO] [stdout]    |                ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 54 |         pub fn chars(&mut self) -> Vec<char> {
[INFO] [stdout]    |                ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/bin/template.rs:62:17
[INFO] [stdout]    |
[INFO] [stdout] 62 |             let $single_tt_pat = $crate::read!(from $scanner { $readable });
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/bin/template.rs:62:17
[INFO] [stdout]    |
[INFO] [stdout] 62 |             let $single_tt_pat = $crate::read!(from $scanner { $readable });
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `next_vec` and `chars` are never used
[INFO] [stdout]   --> src/bin/associative_array.rs:57:16
[INFO] [stdout]    |
[INFO] [stdout] 42 |     impl<'a> Scanner<'a> {
[INFO] [stdout]    |     -------------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 57 |         pub fn next_vec<T>(&mut self, n: usize) -> Vec<T>
[INFO] [stdout]    |                ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 69 |         pub fn chars(&mut self) -> Vec<char> {
[INFO] [stdout]    |                ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `usize1` is never used
[INFO] [stdout]    --> src/bin/template.rs:115:12
[INFO] [stdout]     |
[INFO] [stdout] 115 |     pub fn usize1(n: usize) -> usize {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `bytes` is never used
[INFO] [stdout]    --> src/bin/template.rs:120:12
[INFO] [stdout]     |
[INFO] [stdout] 120 |     pub fn bytes(s: String) -> Vec<u8> {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `usize1` is never used
[INFO] [stdout]    --> src/bin/template.rs:115:12
[INFO] [stdout]     |
[INFO] [stdout] 115 |     pub fn usize1(n: usize) -> usize {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `bytes` is never used
[INFO] [stdout]    --> src/bin/template.rs:120:12
[INFO] [stdout]     |
[INFO] [stdout] 120 |     pub fn bytes(s: String) -> Vec<u8> {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `call_once_from_reader` is never used
[INFO] [stdout]    --> src/bin/template.rs:127:12
[INFO] [stdout]     |
[INFO] [stdout] 125 |     pub trait FnOnceExt<A> {
[INFO] [stdout]     |               --------- associated function in this trait
[INFO] [stdout] 126 |         type Output;
[INFO] [stdout] 127 |         fn call_once_from_reader(this: Self, scanner: &mut Scanner) -> Self::Output;
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `call_once_from_reader` is never used
[INFO] [stdout]    --> src/bin/template.rs:127:12
[INFO] [stdout]     |
[INFO] [stdout] 125 |     pub trait FnOnceExt<A> {
[INFO] [stdout]     |               --------- associated function in this trait
[INFO] [stdout] 126 |         type Output;
[INFO] [stdout] 127 |         fn call_once_from_reader(this: Self, scanner: &mut Scanner) -> Self::Output;
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]    --> src/bin/template.rs:140:18
[INFO] [stdout]     |
[INFO] [stdout] 139 |         fn call_once_from_reader(this: Self, scanner: &mut Scanner) -> O {
[INFO] [stdout]     |                                  ---------- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] 140 |             this(A::read_from_scanner(scanner))
[INFO] [stdout]     |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2024
[INFO] [stdout]     = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout]     = note: requested on the command line with `-D tail-expr-drop-order`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]    --> src/bin/template.rs:140:18
[INFO] [stdout]     |
[INFO] [stdout] 139 |         fn call_once_from_reader(this: Self, scanner: &mut Scanner) -> O {
[INFO] [stdout]     |                                  ---------- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] 140 |             this(A::read_from_scanner(scanner))
[INFO] [stdout]     |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2024
[INFO] [stdout]     = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout]     = note: requested on the command line with `-D tail-expr-drop-order`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]    --> src/bin/template.rs:168:16
[INFO] [stdout]     |
[INFO] [stdout] 164 |         pub fn once<R: Read>(mut rdr: R) -> io::Result<Self> {
[INFO] [stdout]     |                              ---------- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] ...
[INFO] [stdout] 168 |             Ok(Self::Once { words })
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2024
[INFO] [stdout]     = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]    --> src/bin/template.rs:173:22
[INFO] [stdout]     |
[INFO] [stdout] 171 |         pub fn lines<R: BufRead + 'static>(rdr: R) -> Self {
[INFO] [stdout]     |                                            ------ these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] 172 |             Self::Lines {
[INFO] [stdout] 173 |                 rdr: Box::new(rdr),
[INFO] [stdout]     |                      ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2024
[INFO] [stdout]     = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]    --> src/bin/template.rs:168:16
[INFO] [stdout]     |
[INFO] [stdout] 164 |         pub fn once<R: Read>(mut rdr: R) -> io::Result<Self> {
[INFO] [stdout]     |                              ---------- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] ...
[INFO] [stdout] 168 |             Ok(Self::Once { words })
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2024
[INFO] [stdout]     = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]    --> src/bin/template.rs:173:22
[INFO] [stdout]     |
[INFO] [stdout] 171 |         pub fn lines<R: BufRead + 'static>(rdr: R) -> Self {
[INFO] [stdout]     |                                            ------ these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] 172 |             Self::Lines {
[INFO] [stdout] 173 |                 rdr: Box::new(rdr),
[INFO] [stdout]     |                      ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2024
[INFO] [stdout]     = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors; 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors; 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `next_vec` and `chars` are never used
[INFO] [stdout]   --> src/bin/associative_array.rs:57:16
[INFO] [stdout]    |
[INFO] [stdout] 42 |     impl<'a> Scanner<'a> {
[INFO] [stdout]    |     -------------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 57 |         pub fn next_vec<T>(&mut self, n: usize) -> Vec<T>
[INFO] [stdout]    |                ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 69 |         pub fn chars(&mut self) -> Vec<char> {
[INFO] [stdout]    |                ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `next_vec` and `chars` are never used
[INFO] [stdout]   --> src/bin/many_aplusb.rs:42:16
[INFO] [stdout]    |
[INFO] [stdout] 27 |     impl<'a> Scanner<'a> {
[INFO] [stdout]    |     -------------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 42 |         pub fn next_vec<T>(&mut self, n: usize) -> Vec<T>
[INFO] [stdout]    |                ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 54 |         pub fn chars(&mut self) -> Vec<char> {
[INFO] [stdout]    |                ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `library-checker-answers` (bin "template") due to 4 previous errors; 4 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `library-checker-answers` (bin "template" test) due to 4 previous errors; 4 warnings emitted
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `usize1` is never used
[INFO] [stdout]    --> src/bin/unionfind.rs:222:12
[INFO] [stdout]     |
[INFO] [stdout] 222 |     pub fn usize1(n: usize) -> usize {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `bytes` is never used
[INFO] [stdout]    --> src/bin/unionfind.rs:227:12
[INFO] [stdout]     |
[INFO] [stdout] 227 |     pub fn bytes(s: String) -> Vec<u8> {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `call_once_from_reader` is never used
[INFO] [stdout]    --> src/bin/unionfind.rs:234:12
[INFO] [stdout]     |
[INFO] [stdout] 232 |     pub trait FnOnceExt<A> {
[INFO] [stdout]     |               --------- associated function in this trait
[INFO] [stdout] 233 |         type Output;
[INFO] [stdout] 234 |         fn call_once_from_reader(this: Self, scanner: &mut Scanner) -> Self::Output;
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `usize1` is never used
[INFO] [stdout]    --> src/bin/unionfind.rs:222:12
[INFO] [stdout]     |
[INFO] [stdout] 222 |     pub fn usize1(n: usize) -> usize {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `bytes` is never used
[INFO] [stdout]    --> src/bin/unionfind.rs:227:12
[INFO] [stdout]     |
[INFO] [stdout] 227 |     pub fn bytes(s: String) -> Vec<u8> {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `call_once_from_reader` is never used
[INFO] [stdout]    --> src/bin/unionfind.rs:234:12
[INFO] [stdout]     |
[INFO] [stdout] 232 |     pub trait FnOnceExt<A> {
[INFO] [stdout]     |               --------- associated function in this trait
[INFO] [stdout] 233 |         type Output;
[INFO] [stdout] 234 |         fn call_once_from_reader(this: Self, scanner: &mut Scanner) -> Self::Output;
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]    --> src/bin/unionfind.rs:247:18
[INFO] [stdout]     |
[INFO] [stdout] 246 |         fn call_once_from_reader(this: Self, scanner: &mut Scanner) -> O {
[INFO] [stdout]     |                                  ---------- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] 247 |             this(A::read_from_scanner(scanner))
[INFO] [stdout]     |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2024
[INFO] [stdout]     = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout]     = note: requested on the command line with `-D tail-expr-drop-order`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]    --> src/bin/unionfind.rs:275:16
[INFO] [stdout]     |
[INFO] [stdout] 271 |         pub fn once<R: Read>(mut rdr: R) -> io::Result<Self> {
[INFO] [stdout]     |                              ---------- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] ...
[INFO] [stdout] 275 |             Ok(Self::Once { words })
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2024
[INFO] [stdout]     = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]    --> src/bin/unionfind.rs:280:22
[INFO] [stdout]     |
[INFO] [stdout] 278 |         pub fn lines<R: BufRead + 'static>(rdr: R) -> Self {
[INFO] [stdout]     |                                            ------ these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] 279 |             Self::Lines {
[INFO] [stdout] 280 |                 rdr: Box::new(rdr),
[INFO] [stdout]     |                      ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2024
[INFO] [stdout]     = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]    --> src/bin/unionfind.rs:247:18
[INFO] [stdout]     |
[INFO] [stdout] 246 |         fn call_once_from_reader(this: Self, scanner: &mut Scanner) -> O {
[INFO] [stdout]     |                                  ---------- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] 247 |             this(A::read_from_scanner(scanner))
[INFO] [stdout]     |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2024
[INFO] [stdout]     = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout]     = note: requested on the command line with `-D tail-expr-drop-order`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]    --> src/bin/unionfind.rs:275:16
[INFO] [stdout]     |
[INFO] [stdout] 271 |         pub fn once<R: Read>(mut rdr: R) -> io::Result<Self> {
[INFO] [stdout]     |                              ---------- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] ...
[INFO] [stdout] 275 |             Ok(Self::Once { words })
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2024
[INFO] [stdout]     = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]    --> src/bin/unionfind.rs:280:22
[INFO] [stdout]     |
[INFO] [stdout] 278 |         pub fn lines<R: BufRead + 'static>(rdr: R) -> Self {
[INFO] [stdout]     |                                            ------ these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] 279 |             Self::Lines {
[INFO] [stdout] 280 |                 rdr: Box::new(rdr),
[INFO] [stdout]     |                      ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2024
[INFO] [stdout]     = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors; 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors; 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `library-checker-answers` (bin "unionfind" test) due to 4 previous errors; 3 warnings emitted
[INFO] [stderr] error: could not compile `library-checker-answers` (bin "unionfind") due to 4 previous errors; 3 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "c9a8154b176a92f156e76b860a95c3e081d499478587d706439f97dae9e199b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c9a8154b176a92f156e76b860a95c3e081d499478587d706439f97dae9e199b6", kill_on_drop: false }`
[INFO] [stdout] c9a8154b176a92f156e76b860a95c3e081d499478587d706439f97dae9e199b6