[INFO] cloning repository https://github.com/ndd7xv/redis-in-action-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ndd7xv/redis-in-action-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fndd7xv%2Fredis-in-action-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fndd7xv%2Fredis-in-action-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b5036761ed6dc95e3425fabe1b652d4df0325658
[INFO] testing ndd7xv/redis-in-action-rs against beta-2026-01-20 for beta-1.94-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fndd7xv%2Fredis-in-action-rs" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/ndd7xv/redis-in-action-rs
[INFO] finished tweaking git repo https://github.com/ndd7xv/redis-in-action-rs
[INFO] tweaked toml for git repo https://github.com/ndd7xv/redis-in-action-rs written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/ndd7xv/redis-in-action-rs on toolchain beta-2026-01-20
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-01-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/ndd7xv/redis-in-action-rs 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" "+beta-2026-01-20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr]   |
[INFO] [stderr]   = note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr]   = note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr]   = note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-01-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 71f91ef558e22cf768961f6b1c804d56d4bd4df823004b400d69d3abba2602f0
[INFO] running `Command { std: "docker" "start" "-a" "71f91ef558e22cf768961f6b1c804d56d4bd4df823004b400d69d3abba2602f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "71f91ef558e22cf768961f6b1c804d56d4bd4df823004b400d69d3abba2602f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "71f91ef558e22cf768961f6b1c804d56d4bd4df823004b400d69d3abba2602f0", kill_on_drop: false }`
[INFO] [stdout] 71f91ef558e22cf768961f6b1c804d56d4bd4df823004b400d69d3abba2602f0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=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@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-01-20" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1dc912ef5dcee37e70a691d3bb346bd0c6e6bad49473780e141cb1aa4550425e
[INFO] running `Command { std: "docker" "start" "-a" "1dc912ef5dcee37e70a691d3bb346bd0c6e6bad49473780e141cb1aa4550425e", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr]   |
[INFO] [stderr]   = note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr]   = note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr]   = note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr]    Compiling proc-macro2 v1.0.39
[INFO] [stderr]    Compiling unicode-ident v1.0.0
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]    Compiling syn v1.0.96
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling matches v0.1.9
[INFO] [stderr]    Compiling unicode-normalization v0.1.19
[INFO] [stderr]    Compiling bytes v1.1.0
[INFO] [stderr]    Compiling form_urlencoded v1.0.1
[INFO] [stderr]    Compiling sha1_smol v1.0.0
[INFO] [stderr]    Compiling async-trait v0.1.56
[INFO] [stderr]    Compiling serde v1.0.137
[INFO] [stderr]    Compiling ppv-lite86 v0.2.16
[INFO] [stderr]    Compiling serde_json v1.0.81
[INFO] [stderr]    Compiling ryu v1.0.10
[INFO] [stderr]    Compiling combine v4.6.4
[INFO] [stderr]    Compiling itoa v1.0.2
[INFO] [stderr]    Compiling sha1 v0.6.1
[INFO] [stderr]    Compiling dtoa v0.4.8
[INFO] [stderr]    Compiling urlparse v0.7.3
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]    Compiling getrandom v0.2.6
[INFO] [stderr]    Compiling idna v0.2.3
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling url v2.2.2
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling uuid-macro-internal v1.1.1
[INFO] [stderr]    Compiling uuid v1.1.1
[INFO] [stderr]    Compiling redis v0.21.5 (https://github.com/ndd7xv/redis-rs?branch=z-weights#bbe06834)
[INFO] [stderr]    Compiling redis v0.21.5
[INFO] [stderr]    Compiling ch01 v0.1.0 (/opt/rustwide/workdir/ch01)
[INFO] [stdout] warning: this function depends on never type fallback being `()`
[INFO] [stdout]   --> ch01/src/lib.rs:18:1
[INFO] [stdout]    |
[INFO] [stdout] 18 | / pub fn article_vote<S>(conn: &mut Connection, user: S, article: S) -> Result<(), Box<dyn Error>>
[INFO] [stdout] 19 | | where
[INFO] [stdout] 20 | |     S: Into<String>,
[INFO] [stdout]    | |____________________^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in Rust 2024 and in a future release in all editions!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/never-type-fallback.html>
[INFO] [stdout]    = help: specify the types explicitly
[INFO] [stdout] note: in edition 2024, the requirement `!: FromRedisValue` will fail
[INFO] [stdout]   --> ch01/src/lib.rs:38:14
[INFO] [stdout]    |
[INFO] [stdout] 38 |         conn.zincr("score:", &article, VOTE_SCORE)?;
[INFO] [stdout]    |              ^^^^^
[INFO] [stdout]    = note: `#[warn(dependency_on_unit_never_type_fallback)]` (part of `#[warn(rust_2024_compatibility)]`) on by default
[INFO] [stdout] help: use `()` annotations to avoid fallback changes
[INFO] [stdout]    |
[INFO] [stdout] 38 ~         conn.zincr::<_, _, _, ()>("score:", &article, VOTE_SCORE)?;
[INFO] [stdout] 39 ~         conn.hincr::<_, _, _, ()>(&article, "votes", 1)?;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this function depends on never type fallback being `()`
[INFO] [stdout]   --> ch01/src/lib.rs:44:1
[INFO] [stdout]    |
[INFO] [stdout] 44 | / pub fn post_article<S>(
[INFO] [stdout] 45 | |     conn: &mut Connection,
[INFO] [stdout] 46 | |     user: S,
[INFO] [stdout] 47 | |     title: S,
[INFO] [stdout] ...  |
[INFO] [stdout] 50 | | where
[INFO] [stdout] 51 | |     S: Into<String>,
[INFO] [stdout]    | |____________________^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in Rust 2024 and in a future release in all editions!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/never-type-fallback.html>
[INFO] [stdout]    = help: specify the types explicitly
[INFO] [stdout] note: in edition 2024, the requirement `!: FromRedisValue` will fail
[INFO] [stdout]   --> ch01/src/lib.rs:63:10
[INFO] [stdout]    |
[INFO] [stdout] 63 |     conn.sadd(&voted, &user)?;
[INFO] [stdout]    |          ^^^^
[INFO] [stdout] help: use `()` annotations to avoid fallback changes
[INFO] [stdout]    |
[INFO] [stdout] 63 ~     conn.sadd::<_, _, ()>(&voted, &user)?;
[INFO] [stdout] 64 ~     conn.expire::<_, ()>(&voted, ONE_WEEK_IN_SECONDS)?;
[INFO] [stdout] 65 |
[INFO] [stdout] ...
[INFO] [stdout] 71 |     article.push_str(&article_id);
[INFO] [stdout] 72 ~     conn.hset_multiple::<_, _, _, ()>(
[INFO] [stdout] 73 |         &article,
[INFO] [stdout] ...
[INFO] [stdout] 82 |
[INFO] [stdout] 83 ~     conn.zadd::<_, _, _, ()>(
[INFO] [stdout] 84 |         "score:",
[INFO] [stdout] ...
[INFO] [stdout] 87 |     )?;
[INFO] [stdout] 88 ~     conn.zadd::<_, _, _, ()>("time:", &article, &now)?;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this function depends on never type fallback being `()`
[INFO] [stdout]    --> ch01/src/lib.rs:112:1
[INFO] [stdout]     |
[INFO] [stdout] 112 | / pub fn add_remove_groups<Q, R, S>(
[INFO] [stdout] 113 | |     conn: &mut Connection,
[INFO] [stdout] 114 | |     article_id: Q,
[INFO] [stdout] 115 | |     to_add: Vec<R>,
[INFO] [stdout] ...   |
[INFO] [stdout] 120 | |     R: Into<String>,
[INFO] [stdout] 121 | |     S: Into<String>,
[INFO] [stdout]     | |____________________^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in Rust 2024 and in a future release in all editions!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/never-type-fallback.html>
[INFO] [stdout]     = help: specify the types explicitly
[INFO] [stdout] note: in edition 2024, the requirement `!: FromRedisValue` will fail
[INFO] [stdout]    --> ch01/src/lib.rs:129:14
[INFO] [stdout]     |
[INFO] [stdout] 129 |         conn.sadd(group, &article)?;
[INFO] [stdout]     |              ^^^^
[INFO] [stdout] help: use `()` annotations to avoid fallback changes
[INFO] [stdout]     |
[INFO] [stdout] 129 ~         conn.sadd::<_, _, ()>(group, &article)?;
[INFO] [stdout] 130 |     }
[INFO] [stdout] ...
[INFO] [stdout] 134 |         group.push_str(&group_label.into());
[INFO] [stdout] 135 ~         conn.srem::<_, _, ()>(group, &article)?;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this function depends on never type fallback being `()`
[INFO] [stdout]    --> ch01/src/lib.rs:140:1
[INFO] [stdout]     |
[INFO] [stdout] 140 | / pub fn get_group_articles<S>(
[INFO] [stdout] 141 | |     conn: &mut Connection,
[INFO] [stdout] 142 | |     group: S,
[INFO] [stdout] 143 | |     page: isize,
[INFO] [stdout] ...   |
[INFO] [stdout] 146 | | where
[INFO] [stdout] 147 | |     S: Into<String>,
[INFO] [stdout]     | |____________________^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in Rust 2024 and in a future release in all editions!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/never-type-fallback.html>
[INFO] [stdout]     = help: specify the types explicitly
[INFO] [stdout] note: in edition 2024, the requirement `!: FromRedisValue` will fail
[INFO] [stdout]    --> ch01/src/lib.rs:156:14
[INFO] [stdout]     |
[INFO] [stdout] 156 |         conn.zinterstore_max(&key, &[&group_key, &order])?;
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^
[INFO] [stdout] help: use `()` annotations to avoid fallback changes
[INFO] [stdout]     |
[INFO] [stdout] 156 ~         conn.zinterstore_max::<_, ()>(&key, &[&group_key, &order])?;
[INFO] [stdout] 157 ~         conn.expire::<_, ()>(&key, 60)?;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling ch02 v0.1.0 (/opt/rustwide/workdir/ch02)
[INFO] [stdout] warning: this function depends on never type fallback being `()`
[INFO] [stdout]   --> ch02/src/lib.rs:21:1
[INFO] [stdout]    |
[INFO] [stdout] 21 | / pub fn update_token(
[INFO] [stdout] 22 | |     conn: &mut Connection,
[INFO] [stdout] 23 | |     token: &str,
[INFO] [stdout] 24 | |     user: &str,
[INFO] [stdout] 25 | |     item: Option<&str>,
[INFO] [stdout] 26 | | ) -> Result<(), Box<dyn Error>> {
[INFO] [stdout]    | |_______________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in Rust 2024 and in a future release in all editions!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/never-type-fallback.html>
[INFO] [stdout]    = help: specify the types explicitly
[INFO] [stdout] note: in edition 2024, the requirement `!: FromRedisValue` will fail
[INFO] [stdout]   --> ch02/src/lib.rs:28:10
[INFO] [stdout]    |
[INFO] [stdout] 28 |     conn.hset("login:", &token, user)?;
[INFO] [stdout]    |          ^^^^
[INFO] [stdout]    = note: `#[warn(dependency_on_unit_never_type_fallback)]` (part of `#[warn(rust_2024_compatibility)]`) on by default
[INFO] [stdout] help: use `()` annotations to avoid fallback changes
[INFO] [stdout]    |
[INFO] [stdout] 28 ~     conn.hset::<_, _, _, ()>("login:", &token, user)?;
[INFO] [stdout] 29 ~     conn.zadd::<_, _, _, ()>("recent:", &token, timestamp)?;
[INFO] [stdout] 30 |
[INFO] [stdout] ...
[INFO] [stdout] 34 |
[INFO] [stdout] 35 ~         conn.zadd::<_, _, _, ()>(&viewed, item, timestamp)?;
[INFO] [stdout] 36 ~         conn.zremrangebyrank::<_, ()>(&viewed, 0, -26)?;
[INFO] [stdout] 37 ~         conn.zincr::<_, _, _, ()>("viewed:", item, -1)?;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this function depends on never type fallback being `()`
[INFO] [stdout]   --> ch02/src/lib.rs:42:1
[INFO] [stdout]    |
[INFO] [stdout] 42 | / pub fn clean_sessions(
[INFO] [stdout] 43 | |     conn: &mut Connection,
[INFO] [stdout] 44 | |     limit: isize,
[INFO] [stdout] 45 | |     quit: Arc<AtomicBool>,
[INFO] [stdout] 46 | | ) -> Result<(), Box<dyn Error>> {
[INFO] [stdout]    | |_______________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in Rust 2024 and in a future release in all editions!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/never-type-fallback.html>
[INFO] [stdout]    = help: specify the types explicitly
[INFO] [stdout] note: in edition 2024, the requirement `!: FromRedisValue` will fail
[INFO] [stdout]   --> ch02/src/lib.rs:65:14
[INFO] [stdout]    |
[INFO] [stdout] 65 |         conn.del(&views)?;
[INFO] [stdout]    |              ^^^
[INFO] [stdout] help: use `()` annotations to avoid fallback changes
[INFO] [stdout]    |
[INFO] [stdout] 65 ~         conn.del::<_, ()>(&views)?;
[INFO] [stdout] 66 ~         conn.hdel::<_, _, ()>("login:", &tokens)?;
[INFO] [stdout] 67 ~         conn.zrem::<_, _, ()>("recent:", &tokens)?;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this function depends on never type fallback being `()`
[INFO] [stdout]   --> ch02/src/lib.rs:72:1
[INFO] [stdout]    |
[INFO] [stdout] 72 | / pub fn add_to_cart(
[INFO] [stdout] 73 | |     conn: &mut Connection,
[INFO] [stdout] 74 | |     session: &str,
[INFO] [stdout] 75 | |     item: &str,
[INFO] [stdout] 76 | |     count: isize,
[INFO] [stdout] 77 | | ) -> Result<(), Box<dyn Error>> {
[INFO] [stdout]    | |_______________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in Rust 2024 and in a future release in all editions!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/never-type-fallback.html>
[INFO] [stdout]    = help: specify the types explicitly
[INFO] [stdout] note: in edition 2024, the requirement `!: FromRedisValue` will fail
[INFO] [stdout]   --> ch02/src/lib.rs:82:14
[INFO] [stdout]    |
[INFO] [stdout] 82 |         conn.hdel(key, item)?;
[INFO] [stdout]    |              ^^^^
[INFO] [stdout] help: use `()` annotations to avoid fallback changes
[INFO] [stdout]    |
[INFO] [stdout] 82 ~         conn.hdel::<_, _, ()>(key, item)?;
[INFO] [stdout] 83 |     } else {
[INFO] [stdout] 84 ~         conn.hset::<_, _, _, ()>(key, item, count)?;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this function depends on never type fallback being `()`
[INFO] [stdout]    --> ch02/src/lib.rs:89:1
[INFO] [stdout]     |
[INFO] [stdout]  89 | / pub fn clean_full_sessions(
[INFO] [stdout]  90 | |     conn: &mut Connection,
[INFO] [stdout]  91 | |     limit: isize,
[INFO] [stdout]  92 | |     quit: Arc<AtomicBool>,
[INFO] [stdout]  93 | | ) -> Result<(), Box<dyn Error>> {
[INFO] [stdout]     | |_______________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in Rust 2024 and in a future release in all editions!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/never-type-fallback.html>
[INFO] [stdout]     = help: specify the types explicitly
[INFO] [stdout] note: in edition 2024, the requirement `!: FromRedisValue` will fail
[INFO] [stdout]    --> ch02/src/lib.rs:116:14
[INFO] [stdout]     |
[INFO] [stdout] 116 |         conn.del(&session_keys)?;
[INFO] [stdout]     |              ^^^
[INFO] [stdout] help: use `()` annotations to avoid fallback changes
[INFO] [stdout]     |
[INFO] [stdout] 116 ~         conn.del::<_, ()>(&session_keys)?;
[INFO] [stdout] 117 ~         conn.hdel::<_, _, ()>("login:", &sessions)?;
[INFO] [stdout] 118 ~         conn.zrem::<_, _, ()>("recent:", &sessions)?;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this function depends on never type fallback being `()`
[INFO] [stdout]    --> ch02/src/lib.rs:123:1
[INFO] [stdout]     |
[INFO] [stdout] 123 | / pub fn cache_request(
[INFO] [stdout] 124 | |     conn: &mut Connection,
[INFO] [stdout] 125 | |     request: &str,
[INFO] [stdout] 126 | |     callback: &dyn Fn(&str) -> String,
[INFO] [stdout] 127 | | ) -> Result<String, Box<dyn Error>> {
[INFO] [stdout]     | |___________________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in Rust 2024 and in a future release in all editions!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/never-type-fallback.html>
[INFO] [stdout]     = help: specify the types explicitly
[INFO] [stdout] note: in edition 2024, the requirement `!: FromRedisValue` will fail
[INFO] [stdout]    --> ch02/src/lib.rs:136:10
[INFO] [stdout]     |
[INFO] [stdout] 136 |     conn.set_ex(&page_key, &content, 300_usize)?;
[INFO] [stdout]     |          ^^^^^^
[INFO] [stdout] help: use `()` annotations to avoid fallback changes
[INFO] [stdout]     |
[INFO] [stdout] 136 |     conn.set_ex::<_, _, ()>(&page_key, &content, 300_usize)?;
[INFO] [stdout]     |                ++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this function depends on never type fallback being `()`
[INFO] [stdout]    --> ch02/src/lib.rs:150:1
[INFO] [stdout]     |
[INFO] [stdout] 150 | / pub fn schedule_row_cache(
[INFO] [stdout] 151 | |     conn: &mut Connection,
[INFO] [stdout] 152 | |     row_id: &str,
[INFO] [stdout] 153 | |     delay: isize,
[INFO] [stdout] 154 | | ) -> Result<(), Box<dyn Error>> {
[INFO] [stdout]     | |_______________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in Rust 2024 and in a future release in all editions!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/never-type-fallback.html>
[INFO] [stdout]     = help: specify the types explicitly
[INFO] [stdout] note: in edition 2024, the requirement `!: FromRedisValue` will fail
[INFO] [stdout]    --> ch02/src/lib.rs:155:10
[INFO] [stdout]     |
[INFO] [stdout] 155 |     conn.zadd("delay:", row_id, delay)?;
[INFO] [stdout]     |          ^^^^
[INFO] [stdout] help: use `()` annotations to avoid fallback changes
[INFO] [stdout]     |
[INFO] [stdout] 155 ~     conn.zadd::<_, _, _, ()>("delay:", row_id, delay)?;
[INFO] [stdout] 156 |     let now = SystemTime::now().duration_since(UNIX_EPOCH)?.as_millis() as isize;
[INFO] [stdout] 157 ~     conn.zadd::<_, _, _, ()>("schedule:", row_id, now)?;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this function depends on never type fallback being `()`
[INFO] [stdout]    --> ch02/src/lib.rs:161:1
[INFO] [stdout]     |
[INFO] [stdout] 161 | pub fn cache_rows(conn: &mut Connection, quit: Arc<AtomicBool>) -> Result<(), Box<dyn Error>> {
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in Rust 2024 and in a future release in all editions!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/never-type-fallback.html>
[INFO] [stdout]     = help: specify the types explicitly
[INFO] [stdout] note: in edition 2024, the requirement `!: FromRedisValue` will fail
[INFO] [stdout]    --> ch02/src/lib.rs:176:18
[INFO] [stdout]     |
[INFO] [stdout] 176 |             conn.zrem("delay:", &row_id)?;
[INFO] [stdout]     |                  ^^^^
[INFO] [stdout] help: use `()` annotations to avoid fallback changes
[INFO] [stdout]     |
[INFO] [stdout] 176 ~             conn.zrem::<_, _, ()>("delay:", &row_id)?;
[INFO] [stdout] 177 ~             conn.zrem::<_, _, ()>("schedule:", &row_id)?;
[INFO] [stdout] 178 ~             conn.del::<_, ()>(&inv)?;
[INFO] [stdout] 179 |             continue;
[INFO] [stdout] ...
[INFO] [stdout] 184 |         let row = Inventory::get(&row_id);
[INFO] [stdout] 185 ~         conn.zadd::<_, _, _, ()>("schedule:", &row_id, now + delay)?;
[INFO] [stdout] 186 ~         conn.set::<_, _, ()>(&inv, serde_json::to_string(&row)?)?;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this function depends on never type fallback being `()`
[INFO] [stdout]    --> ch02/src/lib.rs:191:1
[INFO] [stdout]     |
[INFO] [stdout] 191 | / pub fn rescale_viewed(
[INFO] [stdout] 192 | |     conn: &mut Connection,
[INFO] [stdout] 193 | |     quit: Arc<AtomicBool>,
[INFO] [stdout] 194 | | ) -> Result<bool, Box<dyn Error>> {
[INFO] [stdout]     | |_________________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in Rust 2024 and in a future release in all editions!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/never-type-fallback.html>
[INFO] [stdout]     = help: specify the types explicitly
[INFO] [stdout] note: in edition 2024, the requirement `!: FromRedisValue` will fail
[INFO] [stdout]    --> ch02/src/lib.rs:196:14
[INFO] [stdout]     |
[INFO] [stdout] 196 |         conn.zremrangebyrank("viewed:", 20000, -1)?;
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^
[INFO] [stdout] help: use `()` annotations to avoid fallback changes
[INFO] [stdout]     |
[INFO] [stdout] 196 ~         conn.zremrangebyrank::<_, ()>("viewed:", 20000, -1)?;
[INFO] [stdout] 197 ~         conn.zinterstore_weights::<_, _, ()>("viewed:", &[("viewed", 0.5)])?;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 33.82s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: ch01 v0.1.0 (/opt/rustwide/workdir/ch01), ch02 v0.1.0 (/opt/rustwide/workdir/ch02), redis v0.21.5, redis v0.21.5 (https://github.com/ndd7xv/redis-rs?branch=z-weights#bbe06834)
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 3`
[INFO] running `Command { std: "docker" "inspect" "1dc912ef5dcee37e70a691d3bb346bd0c6e6bad49473780e141cb1aa4550425e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1dc912ef5dcee37e70a691d3bb346bd0c6e6bad49473780e141cb1aa4550425e", kill_on_drop: false }`
[INFO] [stdout] 1dc912ef5dcee37e70a691d3bb346bd0c6e6bad49473780e141cb1aa4550425e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=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@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-01-20" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f9765a74d09cd2dc59433f77646ca94efb32c44026ac81b6f08940ce6f0651f3
[INFO] running `Command { std: "docker" "start" "-a" "f9765a74d09cd2dc59433f77646ca94efb32c44026ac81b6f08940ce6f0651f3", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr]   |
[INFO] [stderr]   = note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr]   = note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr]   = note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr]    Compiling ch01 v0.1.0 (/opt/rustwide/workdir/ch01)
[INFO] [stdout] warning: this function depends on never type fallback being `()`
[INFO] [stdout]   --> ch01/src/lib.rs:18:1
[INFO] [stdout]    |
[INFO] [stdout] 18 | / pub fn article_vote<S>(conn: &mut Connection, user: S, article: S) -> Result<(), Box<dyn Error>>
[INFO] [stdout] 19 | | where
[INFO] [stdout] 20 | |     S: Into<String>,
[INFO] [stdout]    | |____________________^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in Rust 2024 and in a future release in all editions!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/never-type-fallback.html>
[INFO] [stdout]    = help: specify the types explicitly
[INFO] [stdout] note: in edition 2024, the requirement `!: FromRedisValue` will fail
[INFO] [stdout]   --> ch01/src/lib.rs:38:14
[INFO] [stdout]    |
[INFO] [stdout] 38 |         conn.zincr("score:", &article, VOTE_SCORE)?;
[INFO] [stdout]    |              ^^^^^
[INFO] [stdout]    = note: `#[warn(dependency_on_unit_never_type_fallback)]` (part of `#[warn(rust_2024_compatibility)]`) on by default
[INFO] [stdout] help: use `()` annotations to avoid fallback changes
[INFO] [stdout]    |
[INFO] [stdout] 38 ~         conn.zincr::<_, _, _, ()>("score:", &article, VOTE_SCORE)?;
[INFO] [stdout] 39 ~         conn.hincr::<_, _, _, ()>(&article, "votes", 1)?;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this function depends on never type fallback being `()`
[INFO] [stdout]   --> ch01/src/lib.rs:44:1
[INFO] [stdout]    |
[INFO] [stdout] 44 | / pub fn post_article<S>(
[INFO] [stdout] 45 | |     conn: &mut Connection,
[INFO] [stdout] 46 | |     user: S,
[INFO] [stdout] 47 | |     title: S,
[INFO] [stdout] ...  |
[INFO] [stdout] 50 | | where
[INFO] [stdout] 51 | |     S: Into<String>,
[INFO] [stdout]    | |____________________^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in Rust 2024 and in a future release in all editions!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/never-type-fallback.html>
[INFO] [stdout]    = help: specify the types explicitly
[INFO] [stdout] note: in edition 2024, the requirement `!: FromRedisValue` will fail
[INFO] [stdout]   --> ch01/src/lib.rs:63:10
[INFO] [stdout]    |
[INFO] [stdout] 63 |     conn.sadd(&voted, &user)?;
[INFO] [stdout]    |          ^^^^
[INFO] [stdout] help: use `()` annotations to avoid fallback changes
[INFO] [stdout]    |
[INFO] [stdout] 63 ~     conn.sadd::<_, _, ()>(&voted, &user)?;
[INFO] [stdout] 64 ~     conn.expire::<_, ()>(&voted, ONE_WEEK_IN_SECONDS)?;
[INFO] [stdout] 65 |
[INFO] [stdout] ...
[INFO] [stdout] 71 |     article.push_str(&article_id);
[INFO] [stdout] 72 ~     conn.hset_multiple::<_, _, _, ()>(
[INFO] [stdout] 73 |         &article,
[INFO] [stdout] ...
[INFO] [stdout] 82 |
[INFO] [stdout] 83 ~     conn.zadd::<_, _, _, ()>(
[INFO] [stdout] 84 |         "score:",
[INFO] [stdout] ...
[INFO] [stdout] 87 |     )?;
[INFO] [stdout] 88 ~     conn.zadd::<_, _, _, ()>("time:", &article, &now)?;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this function depends on never type fallback being `()`
[INFO] [stdout]    --> ch01/src/lib.rs:112:1
[INFO] [stdout]     |
[INFO] [stdout] 112 | / pub fn add_remove_groups<Q, R, S>(
[INFO] [stdout] 113 | |     conn: &mut Connection,
[INFO] [stdout] 114 | |     article_id: Q,
[INFO] [stdout] 115 | |     to_add: Vec<R>,
[INFO] [stdout] ...   |
[INFO] [stdout] 120 | |     R: Into<String>,
[INFO] [stdout] 121 | |     S: Into<String>,
[INFO] [stdout]     | |____________________^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in Rust 2024 and in a future release in all editions!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/never-type-fallback.html>
[INFO] [stdout]     = help: specify the types explicitly
[INFO] [stdout] note: in edition 2024, the requirement `!: FromRedisValue` will fail
[INFO] [stdout]    --> ch01/src/lib.rs:129:14
[INFO] [stdout]     |
[INFO] [stdout] 129 |         conn.sadd(group, &article)?;
[INFO] [stdout]     |              ^^^^
[INFO] [stdout] help: use `()` annotations to avoid fallback changes
[INFO] [stdout]     |
[INFO] [stdout] 129 ~         conn.sadd::<_, _, ()>(group, &article)?;
[INFO] [stdout] 130 |     }
[INFO] [stdout] ...
[INFO] [stdout] 134 |         group.push_str(&group_label.into());
[INFO] [stdout] 135 ~         conn.srem::<_, _, ()>(group, &article)?;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this function depends on never type fallback being `()`
[INFO] [stdout]    --> ch01/src/lib.rs:140:1
[INFO] [stdout]     |
[INFO] [stdout] 140 | / pub fn get_group_articles<S>(
[INFO] [stdout] 141 | |     conn: &mut Connection,
[INFO] [stdout] 142 | |     group: S,
[INFO] [stdout] 143 | |     page: isize,
[INFO] [stdout] ...   |
[INFO] [stdout] 146 | | where
[INFO] [stdout] 147 | |     S: Into<String>,
[INFO] [stdout]     | |____________________^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in Rust 2024 and in a future release in all editions!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/never-type-fallback.html>
[INFO] [stdout]     = help: specify the types explicitly
[INFO] [stdout] note: in edition 2024, the requirement `!: FromRedisValue` will fail
[INFO] [stdout]    --> ch01/src/lib.rs:156:14
[INFO] [stdout]     |
[INFO] [stdout] 156 |         conn.zinterstore_max(&key, &[&group_key, &order])?;
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^
[INFO] [stdout] help: use `()` annotations to avoid fallback changes
[INFO] [stdout]     |
[INFO] [stdout] 156 ~         conn.zinterstore_max::<_, ()>(&key, &[&group_key, &order])?;
[INFO] [stdout] 157 ~         conn.expire::<_, ()>(&key, 60)?;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this function depends on never type fallback being `()`
[INFO] [stdout]   --> ch02/src/lib.rs:21:1
[INFO] [stdout]    |
[INFO] [stdout] 21 | / pub fn update_token(
[INFO] [stdout] 22 | |     conn: &mut Connection,
[INFO] [stdout] 23 | |     token: &str,
[INFO] [stdout] 24 | |     user: &str,
[INFO] [stdout] 25 | |     item: Option<&str>,
[INFO] [stdout] 26 | | ) -> Result<(), Box<dyn Error>> {
[INFO] [stdout]    | |_______________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in Rust 2024 and in a future release in all editions!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/never-type-fallback.html>
[INFO] [stdout]    = help: specify the types explicitly
[INFO] [stdout] note: in edition 2024, the requirement `!: FromRedisValue` will fail
[INFO] [stdout]   --> ch02/src/lib.rs:28:10
[INFO] [stdout]    |
[INFO] [stdout] 28 |     conn.hset("login:", &token, user)?;
[INFO] [stdout]    |          ^^^^
[INFO] [stdout]    = note: `#[warn(dependency_on_unit_never_type_fallback)]` (part of `#[warn(rust_2024_compatibility)]`) on by default
[INFO] [stdout] help: use `()` annotations to avoid fallback changes
[INFO] [stdout]    |
[INFO] [stdout] 28 ~     conn.hset::<_, _, _, ()>("login:", &token, user)?;
[INFO] [stdout] 29 ~     conn.zadd::<_, _, _, ()>("recent:", &token, timestamp)?;
[INFO] [stdout] 30 |
[INFO] [stdout] ...
[INFO] [stdout] 34 |
[INFO] [stdout] 35 ~         conn.zadd::<_, _, _, ()>(&viewed, item, timestamp)?;
[INFO] [stdout] 36 ~         conn.zremrangebyrank::<_, ()>(&viewed, 0, -26)?;
[INFO] [stdout] 37 ~         conn.zincr::<_, _, _, ()>("viewed:", item, -1)?;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this function depends on never type fallback being `()`
[INFO] [stdout]   --> ch02/src/lib.rs:42:1
[INFO] [stdout]    |
[INFO] [stdout] 42 | / pub fn clean_sessions(
[INFO] [stdout] 43 | |     conn: &mut Connection,
[INFO] [stdout] 44 | |     limit: isize,
[INFO] [stdout] 45 | |     quit: Arc<AtomicBool>,
[INFO] [stdout] 46 | | ) -> Result<(), Box<dyn Error>> {
[INFO] [stdout]    | |_______________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in Rust 2024 and in a future release in all editions!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/never-type-fallback.html>
[INFO] [stdout]    = help: specify the types explicitly
[INFO] [stdout] note: in edition 2024, the requirement `!: FromRedisValue` will fail
[INFO] [stdout]   --> ch02/src/lib.rs:65:14
[INFO] [stdout]    |
[INFO] [stdout] 65 |         conn.del(&views)?;
[INFO] [stdout]    |              ^^^
[INFO] [stdout] help: use `()` annotations to avoid fallback changes
[INFO] [stdout]    |
[INFO] [stdout] 65 ~         conn.del::<_, ()>(&views)?;
[INFO] [stdout] 66 ~         conn.hdel::<_, _, ()>("login:", &tokens)?;
[INFO] [stdout] 67 ~         conn.zrem::<_, _, ()>("recent:", &tokens)?;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this function depends on never type fallback being `()`
[INFO] [stdout]   --> ch02/src/lib.rs:72:1
[INFO] [stdout]    |
[INFO] [stdout] 72 | / pub fn add_to_cart(
[INFO] [stdout] 73 | |     conn: &mut Connection,
[INFO] [stdout] 74 | |     session: &str,
[INFO] [stdout] 75 | |     item: &str,
[INFO] [stdout] 76 | |     count: isize,
[INFO] [stdout] 77 | | ) -> Result<(), Box<dyn Error>> {
[INFO] [stdout]    | |_______________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in Rust 2024 and in a future release in all editions!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/never-type-fallback.html>
[INFO] [stdout]    = help: specify the types explicitly
[INFO] [stdout] note: in edition 2024, the requirement `!: FromRedisValue` will fail
[INFO] [stdout]   --> ch02/src/lib.rs:82:14
[INFO] [stdout]    |
[INFO] [stdout] 82 |         conn.hdel(key, item)?;
[INFO] [stdout]    |              ^^^^
[INFO] [stdout] help: use `()` annotations to avoid fallback changes
[INFO] [stdout]    |
[INFO] [stdout] 82 ~         conn.hdel::<_, _, ()>(key, item)?;
[INFO] [stdout] 83 |     } else {
[INFO] [stdout] 84 ~         conn.hset::<_, _, _, ()>(key, item, count)?;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this function depends on never type fallback being `()`
[INFO] [stdout]    --> ch02/src/lib.rs:89:1
[INFO] [stdout]     |
[INFO] [stdout]  89 | / pub fn clean_full_sessions(
[INFO] [stdout]  90 | |     conn: &mut Connection,
[INFO] [stdout]  91 | |     limit: isize,
[INFO] [stdout]  92 | |     quit: Arc<AtomicBool>,
[INFO] [stdout]  93 | | ) -> Result<(), Box<dyn Error>> {
[INFO] [stdout]     | |_______________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in Rust 2024 and in a future release in all editions!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/never-type-fallback.html>
[INFO] [stdout]     = help: specify the types explicitly
[INFO] [stdout] note: in edition 2024, the requirement `!: FromRedisValue` will fail
[INFO] [stdout]    --> ch02/src/lib.rs:116:14
[INFO] [stdout]     |
[INFO] [stdout] 116 |         conn.del(&session_keys)?;
[INFO] [stdout]     |              ^^^
[INFO] [stdout] help: use `()` annotations to avoid fallback changes
[INFO] [stdout]     |
[INFO] [stdout] 116 ~         conn.del::<_, ()>(&session_keys)?;
[INFO] [stdout] 117 ~         conn.hdel::<_, _, ()>("login:", &sessions)?;
[INFO] [stdout] 118 ~         conn.zrem::<_, _, ()>("recent:", &sessions)?;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this function depends on never type fallback being `()`
[INFO] [stdout]    --> ch02/src/lib.rs:123:1
[INFO] [stdout]     |
[INFO] [stdout] 123 | / pub fn cache_request(
[INFO] [stdout] 124 | |     conn: &mut Connection,
[INFO] [stdout] 125 | |     request: &str,
[INFO] [stdout] 126 | |     callback: &dyn Fn(&str) -> String,
[INFO] [stdout] 127 | | ) -> Result<String, Box<dyn Error>> {
[INFO] [stdout]     | |___________________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in Rust 2024 and in a future release in all editions!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/never-type-fallback.html>
[INFO] [stdout]     = help: specify the types explicitly
[INFO] [stdout] note: in edition 2024, the requirement `!: FromRedisValue` will fail
[INFO] [stdout]    --> ch02/src/lib.rs:136:10
[INFO] [stdout]     |
[INFO] [stdout] 136 |     conn.set_ex(&page_key, &content, 300_usize)?;
[INFO] [stdout]     |          ^^^^^^
[INFO] [stdout] help: use `()` annotations to avoid fallback changes
[INFO] [stdout]     |
[INFO] [stdout] 136 |     conn.set_ex::<_, _, ()>(&page_key, &content, 300_usize)?;
[INFO] [stdout]     |                ++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this function depends on never type fallback being `()`
[INFO] [stdout]    --> ch02/src/lib.rs:150:1
[INFO] [stdout]     |
[INFO] [stdout] 150 | / pub fn schedule_row_cache(
[INFO] [stdout] 151 | |     conn: &mut Connection,
[INFO] [stdout] 152 | |     row_id: &str,
[INFO] [stdout] 153 | |     delay: isize,
[INFO] [stdout] 154 | | ) -> Result<(), Box<dyn Error>> {
[INFO] [stdout]     | |_______________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in Rust 2024 and in a future release in all editions!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/never-type-fallback.html>
[INFO] [stdout]     = help: specify the types explicitly
[INFO] [stdout] note: in edition 2024, the requirement `!: FromRedisValue` will fail
[INFO] [stdout]    --> ch02/src/lib.rs:155:10
[INFO] [stdout]     |
[INFO] [stdout] 155 |     conn.zadd("delay:", row_id, delay)?;
[INFO] [stdout]     |          ^^^^
[INFO] [stdout] help: use `()` annotations to avoid fallback changes
[INFO] [stdout]     |
[INFO] [stdout] 155 ~     conn.zadd::<_, _, _, ()>("delay:", row_id, delay)?;
[INFO] [stdout] 156 |     let now = SystemTime::now().duration_since(UNIX_EPOCH)?.as_millis() as isize;
[INFO] [stdout] 157 ~     conn.zadd::<_, _, _, ()>("schedule:", row_id, now)?;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this function depends on never type fallback being `()`
[INFO] [stdout]    --> ch02/src/lib.rs:161:1
[INFO] [stdout]     |
[INFO] [stdout] 161 | pub fn cache_rows(conn: &mut Connection, quit: Arc<AtomicBool>) -> Result<(), Box<dyn Error>> {
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in Rust 2024 and in a future release in all editions!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/never-type-fallback.html>
[INFO] [stdout]     = help: specify the types explicitly
[INFO] [stdout] note: in edition 2024, the requirement `!: FromRedisValue` will fail
[INFO] [stdout]    --> ch02/src/lib.rs:176:18
[INFO] [stdout]     |
[INFO] [stdout] 176 |             conn.zrem("delay:", &row_id)?;
[INFO] [stdout]     |                  ^^^^
[INFO] [stdout] help: use `()` annotations to avoid fallback changes
[INFO] [stdout]     |
[INFO] [stdout] 176 ~             conn.zrem::<_, _, ()>("delay:", &row_id)?;
[INFO] [stdout] 177 ~             conn.zrem::<_, _, ()>("schedule:", &row_id)?;
[INFO] [stdout] 178 ~             conn.del::<_, ()>(&inv)?;
[INFO] [stdout] 179 |             continue;
[INFO] [stdout] ...
[INFO] [stdout] 184 |         let row = Inventory::get(&row_id);
[INFO] [stdout] 185 ~         conn.zadd::<_, _, _, ()>("schedule:", &row_id, now + delay)?;
[INFO] [stdout] 186 ~         conn.set::<_, _, ()>(&inv, serde_json::to_string(&row)?)?;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this function depends on never type fallback being `()`
[INFO] [stdout]    --> ch02/src/lib.rs:191:1
[INFO] [stdout]     |
[INFO] [stdout] 191 | / pub fn rescale_viewed(
[INFO] [stdout] 192 | |     conn: &mut Connection,
[INFO] [stdout] 193 | |     quit: Arc<AtomicBool>,
[INFO] [stdout] 194 | | ) -> Result<bool, Box<dyn Error>> {
[INFO] [stdout]     | |_________________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in Rust 2024 and in a future release in all editions!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/never-type-fallback.html>
[INFO] [stdout]     = help: specify the types explicitly
[INFO] [stdout] note: in edition 2024, the requirement `!: FromRedisValue` will fail
[INFO] [stdout]    --> ch02/src/lib.rs:196:14
[INFO] [stdout]     |
[INFO] [stdout] 196 |         conn.zremrangebyrank("viewed:", 20000, -1)?;
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^
[INFO] [stdout] help: use `()` annotations to avoid fallback changes
[INFO] [stdout]     |
[INFO] [stdout] 196 ~         conn.zremrangebyrank::<_, ()>("viewed:", 20000, -1)?;
[INFO] [stdout] 197 ~         conn.zinterstore_weights::<_, _, ()>("viewed:", &[("viewed", 0.5)])?;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling ch02 v0.1.0 (/opt/rustwide/workdir/ch02)
[INFO] [stdout] warning: this function depends on never type fallback being `()`
[INFO] [stdout]   --> ch02/src/lib.rs:21:1
[INFO] [stdout]    |
[INFO] [stdout] 21 | / pub fn update_token(
[INFO] [stdout] 22 | |     conn: &mut Connection,
[INFO] [stdout] 23 | |     token: &str,
[INFO] [stdout] 24 | |     user: &str,
[INFO] [stdout] 25 | |     item: Option<&str>,
[INFO] [stdout] 26 | | ) -> Result<(), Box<dyn Error>> {
[INFO] [stdout]    | |_______________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in Rust 2024 and in a future release in all editions!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/never-type-fallback.html>
[INFO] [stdout]    = help: specify the types explicitly
[INFO] [stdout] note: in edition 2024, the requirement `!: FromRedisValue` will fail
[INFO] [stdout]   --> ch02/src/lib.rs:28:10
[INFO] [stdout]    |
[INFO] [stdout] 28 |     conn.hset("login:", &token, user)?;
[INFO] [stdout]    |          ^^^^
[INFO] [stdout]    = note: `#[warn(dependency_on_unit_never_type_fallback)]` (part of `#[warn(rust_2024_compatibility)]`) on by default
[INFO] [stdout] help: use `()` annotations to avoid fallback changes
[INFO] [stdout]    |
[INFO] [stdout] 28 ~     conn.hset::<_, _, _, ()>("login:", &token, user)?;
[INFO] [stdout] 29 ~     conn.zadd::<_, _, _, ()>("recent:", &token, timestamp)?;
[INFO] [stdout] 30 |
[INFO] [stdout] ...
[INFO] [stdout] 34 |
[INFO] [stdout] 35 ~         conn.zadd::<_, _, _, ()>(&viewed, item, timestamp)?;
[INFO] [stdout] 36 ~         conn.zremrangebyrank::<_, ()>(&viewed, 0, -26)?;
[INFO] [stdout] 37 ~         conn.zincr::<_, _, _, ()>("viewed:", item, -1)?;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this function depends on never type fallback being `()`
[INFO] [stdout]   --> ch02/src/lib.rs:42:1
[INFO] [stdout]    |
[INFO] [stdout] 42 | / pub fn clean_sessions(
[INFO] [stdout] 43 | |     conn: &mut Connection,
[INFO] [stdout] 44 | |     limit: isize,
[INFO] [stdout] 45 | |     quit: Arc<AtomicBool>,
[INFO] [stdout] 46 | | ) -> Result<(), Box<dyn Error>> {
[INFO] [stdout]    | |_______________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in Rust 2024 and in a future release in all editions!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/never-type-fallback.html>
[INFO] [stdout]    = help: specify the types explicitly
[INFO] [stdout] note: in edition 2024, the requirement `!: FromRedisValue` will fail
[INFO] [stdout]   --> ch02/src/lib.rs:65:14
[INFO] [stdout]    |
[INFO] [stdout] 65 |         conn.del(&views)?;
[INFO] [stdout]    |              ^^^
[INFO] [stdout] help: use `()` annotations to avoid fallback changes
[INFO] [stdout]    |
[INFO] [stdout] 65 ~         conn.del::<_, ()>(&views)?;
[INFO] [stdout] 66 ~         conn.hdel::<_, _, ()>("login:", &tokens)?;
[INFO] [stdout] 67 ~         conn.zrem::<_, _, ()>("recent:", &tokens)?;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this function depends on never type fallback being `()`
[INFO] [stdout]   --> ch02/src/lib.rs:72:1
[INFO] [stdout]    |
[INFO] [stdout] 72 | / pub fn add_to_cart(
[INFO] [stdout] 73 | |     conn: &mut Connection,
[INFO] [stdout] 74 | |     session: &str,
[INFO] [stdout] 75 | |     item: &str,
[INFO] [stdout] 76 | |     count: isize,
[INFO] [stdout] 77 | | ) -> Result<(), Box<dyn Error>> {
[INFO] [stdout]    | |_______________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in Rust 2024 and in a future release in all editions!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/never-type-fallback.html>
[INFO] [stdout]    = help: specify the types explicitly
[INFO] [stdout] note: in edition 2024, the requirement `!: FromRedisValue` will fail
[INFO] [stdout]   --> ch02/src/lib.rs:82:14
[INFO] [stdout]    |
[INFO] [stdout] 82 |         conn.hdel(key, item)?;
[INFO] [stdout]    |              ^^^^
[INFO] [stdout] help: use `()` annotations to avoid fallback changes
[INFO] [stdout]    |
[INFO] [stdout] 82 ~         conn.hdel::<_, _, ()>(key, item)?;
[INFO] [stdout] 83 |     } else {
[INFO] [stdout] 84 ~         conn.hset::<_, _, _, ()>(key, item, count)?;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this function depends on never type fallback being `()`
[INFO] [stdout]    --> ch02/src/lib.rs:89:1
[INFO] [stdout]     |
[INFO] [stdout]  89 | / pub fn clean_full_sessions(
[INFO] [stdout]  90 | |     conn: &mut Connection,
[INFO] [stdout]  91 | |     limit: isize,
[INFO] [stdout]  92 | |     quit: Arc<AtomicBool>,
[INFO] [stdout]  93 | | ) -> Result<(), Box<dyn Error>> {
[INFO] [stdout]     | |_______________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in Rust 2024 and in a future release in all editions!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/never-type-fallback.html>
[INFO] [stdout]     = help: specify the types explicitly
[INFO] [stdout] note: in edition 2024, the requirement `!: FromRedisValue` will fail
[INFO] [stdout]    --> ch02/src/lib.rs:116:14
[INFO] [stdout]     |
[INFO] [stdout] 116 |         conn.del(&session_keys)?;
[INFO] [stdout]     |              ^^^
[INFO] [stdout] help: use `()` annotations to avoid fallback changes
[INFO] [stdout]     |
[INFO] [stdout] 116 ~         conn.del::<_, ()>(&session_keys)?;
[INFO] [stdout] 117 ~         conn.hdel::<_, _, ()>("login:", &sessions)?;
[INFO] [stdout] 118 ~         conn.zrem::<_, _, ()>("recent:", &sessions)?;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this function depends on never type fallback being `()`
[INFO] [stdout]    --> ch02/src/lib.rs:123:1
[INFO] [stdout]     |
[INFO] [stdout] 123 | / pub fn cache_request(
[INFO] [stdout] 124 | |     conn: &mut Connection,
[INFO] [stdout] 125 | |     request: &str,
[INFO] [stdout] 126 | |     callback: &dyn Fn(&str) -> String,
[INFO] [stdout] 127 | | ) -> Result<String, Box<dyn Error>> {
[INFO] [stdout]     | |___________________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in Rust 2024 and in a future release in all editions!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/never-type-fallback.html>
[INFO] [stdout]     = help: specify the types explicitly
[INFO] [stdout] note: in edition 2024, the requirement `!: FromRedisValue` will fail
[INFO] [stdout]    --> ch02/src/lib.rs:136:10
[INFO] [stdout]     |
[INFO] [stdout] 136 |     conn.set_ex(&page_key, &content, 300_usize)?;
[INFO] [stdout]     |          ^^^^^^
[INFO] [stdout] help: use `()` annotations to avoid fallback changes
[INFO] [stdout]     |
[INFO] [stdout] 136 |     conn.set_ex::<_, _, ()>(&page_key, &content, 300_usize)?;
[INFO] [stdout]     |                ++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this function depends on never type fallback being `()`
[INFO] [stdout]    --> ch02/src/lib.rs:150:1
[INFO] [stdout]     |
[INFO] [stdout] 150 | / pub fn schedule_row_cache(
[INFO] [stdout] 151 | |     conn: &mut Connection,
[INFO] [stdout] 152 | |     row_id: &str,
[INFO] [stdout] 153 | |     delay: isize,
[INFO] [stdout] 154 | | ) -> Result<(), Box<dyn Error>> {
[INFO] [stdout]     | |_______________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in Rust 2024 and in a future release in all editions!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/never-type-fallback.html>
[INFO] [stdout]     = help: specify the types explicitly
[INFO] [stdout] note: in edition 2024, the requirement `!: FromRedisValue` will fail
[INFO] [stdout]    --> ch02/src/lib.rs:155:10
[INFO] [stdout]     |
[INFO] [stdout] 155 |     conn.zadd("delay:", row_id, delay)?;
[INFO] [stdout]     |          ^^^^
[INFO] [stdout] help: use `()` annotations to avoid fallback changes
[INFO] [stdout]     |
[INFO] [stdout] 155 ~     conn.zadd::<_, _, _, ()>("delay:", row_id, delay)?;
[INFO] [stdout] 156 |     let now = SystemTime::now().duration_since(UNIX_EPOCH)?.as_millis() as isize;
[INFO] [stdout] 157 ~     conn.zadd::<_, _, _, ()>("schedule:", row_id, now)?;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this function depends on never type fallback being `()`
[INFO] [stdout]    --> ch02/src/lib.rs:161:1
[INFO] [stdout]     |
[INFO] [stdout] 161 | pub fn cache_rows(conn: &mut Connection, quit: Arc<AtomicBool>) -> Result<(), Box<dyn Error>> {
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in Rust 2024 and in a future release in all editions!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/never-type-fallback.html>
[INFO] [stdout]     = help: specify the types explicitly
[INFO] [stdout] note: in edition 2024, the requirement `!: FromRedisValue` will fail
[INFO] [stdout]    --> ch02/src/lib.rs:176:18
[INFO] [stdout]     |
[INFO] [stdout] 176 |             conn.zrem("delay:", &row_id)?;
[INFO] [stdout]     |                  ^^^^
[INFO] [stdout] help: use `()` annotations to avoid fallback changes
[INFO] [stdout]     |
[INFO] [stdout] 176 ~             conn.zrem::<_, _, ()>("delay:", &row_id)?;
[INFO] [stdout] 177 ~             conn.zrem::<_, _, ()>("schedule:", &row_id)?;
[INFO] [stdout] 178 ~             conn.del::<_, ()>(&inv)?;
[INFO] [stdout] 179 |             continue;
[INFO] [stdout] ...
[INFO] [stdout] 184 |         let row = Inventory::get(&row_id);
[INFO] [stdout] 185 ~         conn.zadd::<_, _, _, ()>("schedule:", &row_id, now + delay)?;
[INFO] [stdout] 186 ~         conn.set::<_, _, ()>(&inv, serde_json::to_string(&row)?)?;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this function depends on never type fallback being `()`
[INFO] [stdout]    --> ch02/src/lib.rs:191:1
[INFO] [stdout]     |
[INFO] [stdout] 191 | / pub fn rescale_viewed(
[INFO] [stdout] 192 | |     conn: &mut Connection,
[INFO] [stdout] 193 | |     quit: Arc<AtomicBool>,
[INFO] [stdout] 194 | | ) -> Result<bool, Box<dyn Error>> {
[INFO] [stdout]     | |_________________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in Rust 2024 and in a future release in all editions!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/never-type-fallback.html>
[INFO] [stdout]     = help: specify the types explicitly
[INFO] [stdout] note: in edition 2024, the requirement `!: FromRedisValue` will fail
[INFO] [stdout]    --> ch02/src/lib.rs:196:14
[INFO] [stdout]     |
[INFO] [stdout] 196 |         conn.zremrangebyrank("viewed:", 20000, -1)?;
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^
[INFO] [stdout] help: use `()` annotations to avoid fallback changes
[INFO] [stdout]     |
[INFO] [stdout] 196 ~         conn.zremrangebyrank::<_, ()>("viewed:", 20000, -1)?;
[INFO] [stdout] 197 ~         conn.zinterstore_weights::<_, _, ()>("viewed:", &[("viewed", 0.5)])?;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this function depends on never type fallback being `()`
[INFO] [stdout]   --> ch01/src/lib.rs:18:1
[INFO] [stdout]    |
[INFO] [stdout] 18 | / pub fn article_vote<S>(conn: &mut Connection, user: S, article: S) -> Result<(), Box<dyn Error>>
[INFO] [stdout] 19 | | where
[INFO] [stdout] 20 | |     S: Into<String>,
[INFO] [stdout]    | |____________________^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in Rust 2024 and in a future release in all editions!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/never-type-fallback.html>
[INFO] [stdout]    = help: specify the types explicitly
[INFO] [stdout] note: in edition 2024, the requirement `!: FromRedisValue` will fail
[INFO] [stdout]   --> ch01/src/lib.rs:38:14
[INFO] [stdout]    |
[INFO] [stdout] 38 |         conn.zincr("score:", &article, VOTE_SCORE)?;
[INFO] [stdout]    |              ^^^^^
[INFO] [stdout]    = note: `#[warn(dependency_on_unit_never_type_fallback)]` (part of `#[warn(rust_2024_compatibility)]`) on by default
[INFO] [stdout] help: use `()` annotations to avoid fallback changes
[INFO] [stdout]    |
[INFO] [stdout] 38 ~         conn.zincr::<_, _, _, ()>("score:", &article, VOTE_SCORE)?;
[INFO] [stdout] 39 ~         conn.hincr::<_, _, _, ()>(&article, "votes", 1)?;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this function depends on never type fallback being `()`
[INFO] [stdout]   --> ch01/src/lib.rs:44:1
[INFO] [stdout]    |
[INFO] [stdout] 44 | / pub fn post_article<S>(
[INFO] [stdout] 45 | |     conn: &mut Connection,
[INFO] [stdout] 46 | |     user: S,
[INFO] [stdout] 47 | |     title: S,
[INFO] [stdout] ...  |
[INFO] [stdout] 50 | | where
[INFO] [stdout] 51 | |     S: Into<String>,
[INFO] [stdout]    | |____________________^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in Rust 2024 and in a future release in all editions!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/never-type-fallback.html>
[INFO] [stdout]    = help: specify the types explicitly
[INFO] [stdout] note: in edition 2024, the requirement `!: FromRedisValue` will fail
[INFO] [stdout]   --> ch01/src/lib.rs:63:10
[INFO] [stdout]    |
[INFO] [stdout] 63 |     conn.sadd(&voted, &user)?;
[INFO] [stdout]    |          ^^^^
[INFO] [stdout] help: use `()` annotations to avoid fallback changes
[INFO] [stdout]    |
[INFO] [stdout] 63 ~     conn.sadd::<_, _, ()>(&voted, &user)?;
[INFO] [stdout] 64 ~     conn.expire::<_, ()>(&voted, ONE_WEEK_IN_SECONDS)?;
[INFO] [stdout] 65 |
[INFO] [stdout] ...
[INFO] [stdout] 71 |     article.push_str(&article_id);
[INFO] [stdout] 72 ~     conn.hset_multiple::<_, _, _, ()>(
[INFO] [stdout] 73 |         &article,
[INFO] [stdout] ...
[INFO] [stdout] 82 |
[INFO] [stdout] 83 ~     conn.zadd::<_, _, _, ()>(
[INFO] [stdout] 84 |         "score:",
[INFO] [stdout] ...
[INFO] [stdout] 87 |     )?;
[INFO] [stdout] 88 ~     conn.zadd::<_, _, _, ()>("time:", &article, &now)?;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this function depends on never type fallback being `()`
[INFO] [stdout]    --> ch01/src/lib.rs:112:1
[INFO] [stdout]     |
[INFO] [stdout] 112 | / pub fn add_remove_groups<Q, R, S>(
[INFO] [stdout] 113 | |     conn: &mut Connection,
[INFO] [stdout] 114 | |     article_id: Q,
[INFO] [stdout] 115 | |     to_add: Vec<R>,
[INFO] [stdout] ...   |
[INFO] [stdout] 120 | |     R: Into<String>,
[INFO] [stdout] 121 | |     S: Into<String>,
[INFO] [stdout]     | |____________________^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in Rust 2024 and in a future release in all editions!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/never-type-fallback.html>
[INFO] [stdout]     = help: specify the types explicitly
[INFO] [stdout] note: in edition 2024, the requirement `!: FromRedisValue` will fail
[INFO] [stdout]    --> ch01/src/lib.rs:129:14
[INFO] [stdout]     |
[INFO] [stdout] 129 |         conn.sadd(group, &article)?;
[INFO] [stdout]     |              ^^^^
[INFO] [stdout] help: use `()` annotations to avoid fallback changes
[INFO] [stdout]     |
[INFO] [stdout] 129 ~         conn.sadd::<_, _, ()>(group, &article)?;
[INFO] [stdout] 130 |     }
[INFO] [stdout] ...
[INFO] [stdout] 134 |         group.push_str(&group_label.into());
[INFO] [stdout] 135 ~         conn.srem::<_, _, ()>(group, &article)?;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this function depends on never type fallback being `()`
[INFO] [stdout]    --> ch01/src/lib.rs:140:1
[INFO] [stdout]     |
[INFO] [stdout] 140 | / pub fn get_group_articles<S>(
[INFO] [stdout] 141 | |     conn: &mut Connection,
[INFO] [stdout] 142 | |     group: S,
[INFO] [stdout] 143 | |     page: isize,
[INFO] [stdout] ...   |
[INFO] [stdout] 146 | | where
[INFO] [stdout] 147 | |     S: Into<String>,
[INFO] [stdout]     | |____________________^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in Rust 2024 and in a future release in all editions!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/never-type-fallback.html>
[INFO] [stdout]     = help: specify the types explicitly
[INFO] [stdout] note: in edition 2024, the requirement `!: FromRedisValue` will fail
[INFO] [stdout]    --> ch01/src/lib.rs:156:14
[INFO] [stdout]     |
[INFO] [stdout] 156 |         conn.zinterstore_max(&key, &[&group_key, &order])?;
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^
[INFO] [stdout] help: use `()` annotations to avoid fallback changes
[INFO] [stdout]     |
[INFO] [stdout] 156 ~         conn.zinterstore_max::<_, ()>(&key, &[&group_key, &order])?;
[INFO] [stdout] 157 ~         conn.expire::<_, ()>(&key, 60)?;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.35s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: ch01 v0.1.0 (/opt/rustwide/workdir/ch01), ch02 v0.1.0 (/opt/rustwide/workdir/ch02), redis v0.21.5, redis v0.21.5 (https://github.com/ndd7xv/redis-rs?branch=z-weights#bbe06834)
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 4`
[INFO] running `Command { std: "docker" "inspect" "f9765a74d09cd2dc59433f77646ca94efb32c44026ac81b6f08940ce6f0651f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f9765a74d09cd2dc59433f77646ca94efb32c44026ac81b6f08940ce6f0651f3", kill_on_drop: false }`
[INFO] [stdout] f9765a74d09cd2dc59433f77646ca94efb32c44026ac81b6f08940ce6f0651f3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=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@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-01-20" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] a7b5bf9698db557acbda423461037d1efe77d8d1c6b0ab0b817304716553f7d8
[INFO] running `Command { std: "docker" "start" "-a" "a7b5bf9698db557acbda423461037d1efe77d8d1c6b0ab0b817304716553f7d8", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr]   |
[INFO] [stderr]   = note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr]   = note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr]   = note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr] warning: this function depends on never type fallback being `()`
[INFO] [stderr]   --> ch01/src/lib.rs:18:1
[INFO] [stderr]    |
[INFO] [stderr] 18 | / pub fn article_vote<S>(conn: &mut Connection, user: S, article: S) -> Result<(), Box<dyn Error>>
[INFO] [stderr] 19 | | where
[INFO] [stderr] 20 | |     S: Into<String>,
[INFO] [stderr]    | |____________________^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in Rust 2024 and in a future release in all editions!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/never-type-fallback.html>
[INFO] [stderr]    = help: specify the types explicitly
[INFO] [stderr] note: in edition 2024, the requirement `!: FromRedisValue` will fail
[INFO] [stderr]   --> ch01/src/lib.rs:38:14
[INFO] [stderr]    |
[INFO] [stderr] 38 |         conn.zincr("score:", &article, VOTE_SCORE)?;
[INFO] [stderr]    |              ^^^^^
[INFO] [stderr]    = note: `#[warn(dependency_on_unit_never_type_fallback)]` (part of `#[warn(rust_2024_compatibility)]`) on by default
[INFO] [stderr] help: use `()` annotations to avoid fallback changes
[INFO] [stderr]    |
[INFO] [stderr] 38 ~         conn.zincr::<_, _, _, ()>("score:", &article, VOTE_SCORE)?;
[INFO] [stderr] 39 ~         conn.hincr::<_, _, _, ()>(&article, "votes", 1)?;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: this function depends on never type fallback being `()`
[INFO] [stderr]   --> ch01/src/lib.rs:44:1
[INFO] [stderr]    |
[INFO] [stderr] 44 | / pub fn post_article<S>(
[INFO] [stderr] 45 | |     conn: &mut Connection,
[INFO] [stderr] 46 | |     user: S,
[INFO] [stderr] 47 | |     title: S,
[INFO] [stderr] ...  |
[INFO] [stderr] 50 | | where
[INFO] [stderr] 51 | |     S: Into<String>,
[INFO] [stderr]    | |____________________^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in Rust 2024 and in a future release in all editions!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/never-type-fallback.html>
[INFO] [stderr]    = help: specify the types explicitly
[INFO] [stderr] note: in edition 2024, the requirement `!: FromRedisValue` will fail
[INFO] [stderr]   --> ch01/src/lib.rs:63:10
[INFO] [stderr]    |
[INFO] [stderr] 63 |     conn.sadd(&voted, &user)?;
[INFO] [stderr]    |          ^^^^
[INFO] [stderr] help: use `()` annotations to avoid fallback changes
[INFO] [stderr]    |
[INFO] [stderr] 63 ~     conn.sadd::<_, _, ()>(&voted, &user)?;
[INFO] [stderr] 64 ~     conn.expire::<_, ()>(&voted, ONE_WEEK_IN_SECONDS)?;
[INFO] [stderr] 65 |
[INFO] [stderr] ...
[INFO] [stderr] 71 |     article.push_str(&article_id);
[INFO] [stderr] 72 ~     conn.hset_multiple::<_, _, _, ()>(
[INFO] [stderr] 73 |         &article,
[INFO] [stderr] ...
[INFO] [stderr] 82 |
[INFO] [stderr] 83 ~     conn.zadd::<_, _, _, ()>(
[INFO] [stderr] 84 |         "score:",
[INFO] [stderr] ...
[INFO] [stderr] 87 |     )?;
[INFO] [stderr] 88 ~     conn.zadd::<_, _, _, ()>("time:", &article, &now)?;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: this function depends on never type fallback being `()`
[INFO] [stderr]    --> ch01/src/lib.rs:112:1
[INFO] [stderr]     |
[INFO] [stderr] 112 | / pub fn add_remove_groups<Q, R, S>(
[INFO] [stderr] 113 | |     conn: &mut Connection,
[INFO] [stderr] 114 | |     article_id: Q,
[INFO] [stderr] 115 | |     to_add: Vec<R>,
[INFO] [stderr] ...   |
[INFO] [stderr] 120 | |     R: Into<String>,
[INFO] [stderr] 121 | |     S: Into<String>,
[INFO] [stderr]     | |____________________^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in Rust 2024 and in a future release in all editions!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/never-type-fallback.html>
[INFO] [stderr]     = help: specify the types explicitly
[INFO] [stderr] note: in edition 2024, the requirement `!: FromRedisValue` will fail
[INFO] [stderr]    --> ch01/src/lib.rs:129:14
[INFO] [stderr]     |
[INFO] [stderr] 129 |         conn.sadd(group, &article)?;
[INFO] [stderr]     |              ^^^^
[INFO] [stderr] help: use `()` annotations to avoid fallback changes
[INFO] [stderr]     |
[INFO] [stderr] 129 ~         conn.sadd::<_, _, ()>(group, &article)?;
[INFO] [stderr] 130 |     }
[INFO] [stderr] ...
[INFO] [stderr] 134 |         group.push_str(&group_label.into());
[INFO] [stderr] 135 ~         conn.srem::<_, _, ()>(group, &article)?;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: this function depends on never type fallback being `()`
[INFO] [stderr]    --> ch01/src/lib.rs:140:1
[INFO] [stderr]     |
[INFO] [stderr] 140 | / pub fn get_group_articles<S>(
[INFO] [stderr] 141 | |     conn: &mut Connection,
[INFO] [stderr] 142 | |     group: S,
[INFO] [stderr] 143 | |     page: isize,
[INFO] [stderr] ...   |
[INFO] [stderr] 146 | | where
[INFO] [stderr] 147 | |     S: Into<String>,
[INFO] [stderr]     | |____________________^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in Rust 2024 and in a future release in all editions!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/never-type-fallback.html>
[INFO] [stderr]     = help: specify the types explicitly
[INFO] [stderr] note: in edition 2024, the requirement `!: FromRedisValue` will fail
[INFO] [stderr]    --> ch01/src/lib.rs:156:14
[INFO] [stderr]     |
[INFO] [stderr] 156 |         conn.zinterstore_max(&key, &[&group_key, &order])?;
[INFO] [stderr]     |              ^^^^^^^^^^^^^^^
[INFO] [stderr] help: use `()` annotations to avoid fallback changes
[INFO] [stderr]     |
[INFO] [stderr] 156 ~         conn.zinterstore_max::<_, ()>(&key, &[&group_key, &order])?;
[INFO] [stderr] 157 ~         conn.expire::<_, ()>(&key, 60)?;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: `ch01` (lib) generated 4 warnings (run `cargo fix --lib -p ch01` to apply 4 suggestions)
[INFO] [stderr] warning: `ch01` (lib test) generated 4 warnings (4 duplicates)
[INFO] [stderr] warning: this function depends on never type fallback being `()`
[INFO] [stderr]   --> ch02/src/lib.rs:21:1
[INFO] [stderr]    |
[INFO] [stderr] 21 | / pub fn update_token(
[INFO] [stderr] 22 | |     conn: &mut Connection,
[INFO] [stderr] 23 | |     token: &str,
[INFO] [stderr] 24 | |     user: &str,
[INFO] [stderr] 25 | |     item: Option<&str>,
[INFO] [stderr] 26 | | ) -> Result<(), Box<dyn Error>> {
[INFO] [stderr]    | |_______________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in Rust 2024 and in a future release in all editions!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/never-type-fallback.html>
[INFO] [stderr]    = help: specify the types explicitly
[INFO] [stderr] note: in edition 2024, the requirement `!: FromRedisValue` will fail
[INFO] [stderr]   --> ch02/src/lib.rs:28:10
[INFO] [stderr]    |
[INFO] [stderr] 28 |     conn.hset("login:", &token, user)?;
[INFO] [stderr]    |          ^^^^
[INFO] [stderr]    = note: `#[warn(dependency_on_unit_never_type_fallback)]` (part of `#[warn(rust_2024_compatibility)]`) on by default
[INFO] [stderr] help: use `()` annotations to avoid fallback changes
[INFO] [stderr]    |
[INFO] [stderr] 28 ~     conn.hset::<_, _, _, ()>("login:", &token, user)?;
[INFO] [stderr] 29 ~     conn.zadd::<_, _, _, ()>("recent:", &token, timestamp)?;
[INFO] [stderr] 30 |
[INFO] [stderr] ...
[INFO] [stderr] 34 |
[INFO] [stderr] 35 ~         conn.zadd::<_, _, _, ()>(&viewed, item, timestamp)?;
[INFO] [stderr] 36 ~         conn.zremrangebyrank::<_, ()>(&viewed, 0, -26)?;
[INFO] [stderr] 37 ~         conn.zincr::<_, _, _, ()>("viewed:", item, -1)?;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: this function depends on never type fallback being `()`
[INFO] [stderr]   --> ch02/src/lib.rs:42:1
[INFO] [stderr]    |
[INFO] [stderr] 42 | / pub fn clean_sessions(
[INFO] [stderr] 43 | |     conn: &mut Connection,
[INFO] [stderr] 44 | |     limit: isize,
[INFO] [stderr] 45 | |     quit: Arc<AtomicBool>,
[INFO] [stderr] 46 | | ) -> Result<(), Box<dyn Error>> {
[INFO] [stderr]    | |_______________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in Rust 2024 and in a future release in all editions!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/never-type-fallback.html>
[INFO] [stderr]    = help: specify the types explicitly
[INFO] [stderr] note: in edition 2024, the requirement `!: FromRedisValue` will fail
[INFO] [stderr]   --> ch02/src/lib.rs:65:14
[INFO] [stderr]    |
[INFO] [stderr] 65 |         conn.del(&views)?;
[INFO] [stderr]    |              ^^^
[INFO] [stderr] help: use `()` annotations to avoid fallback changes
[INFO] [stderr]    |
[INFO] [stderr] 65 ~         conn.del::<_, ()>(&views)?;
[INFO] [stderr] 66 ~         conn.hdel::<_, _, ()>("login:", &tokens)?;
[INFO] [stderr] 67 ~         conn.zrem::<_, _, ()>("recent:", &tokens)?;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: this function depends on never type fallback being `()`
[INFO] [stderr]   --> ch02/src/lib.rs:72:1
[INFO] [stderr]    |
[INFO] [stderr] 72 | / pub fn add_to_cart(
[INFO] [stderr] 73 | |     conn: &mut Connection,
[INFO] [stderr] 74 | |     session: &str,
[INFO] [stderr] 75 | |     item: &str,
[INFO] [stderr] 76 | |     count: isize,
[INFO] [stderr] 77 | | ) -> Result<(), Box<dyn Error>> {
[INFO] [stderr]    | |_______________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in Rust 2024 and in a future release in all editions!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/never-type-fallback.html>
[INFO] [stderr]    = help: specify the types explicitly
[INFO] [stderr] note: in edition 2024, the requirement `!: FromRedisValue` will fail
[INFO] [stderr]   --> ch02/src/lib.rs:82:14
[INFO] [stderr]    |
[INFO] [stderr] 82 |         conn.hdel(key, item)?;
[INFO] [stderr]    |              ^^^^
[INFO] [stderr] help: use `()` annotations to avoid fallback changes
[INFO] [stderr]    |
[INFO] [stderr] 82 ~         conn.hdel::<_, _, ()>(key, item)?;
[INFO] [stderr] 83 |     } else {
[INFO] [stderr] 84 ~         conn.hset::<_, _, _, ()>(key, item, count)?;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: this function depends on never type fallback being `()`
[INFO] [stderr]    --> ch02/src/lib.rs:89:1
[INFO] [stderr]     |
[INFO] [stderr]  89 | / pub fn clean_full_sessions(
[INFO] [stderr]  90 | |     conn: &mut Connection,
[INFO] [stderr]  91 | |     limit: isize,
[INFO] [stderr]  92 | |     quit: Arc<AtomicBool>,
[INFO] [stderr]  93 | | ) -> Result<(), Box<dyn Error>> {
[INFO] [stderr]     | |_______________________________^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in Rust 2024 and in a future release in all editions!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/never-type-fallback.html>
[INFO] [stderr]     = help: specify the types explicitly
[INFO] [stderr] note: in edition 2024, the requirement `!: FromRedisValue` will fail
[INFO] [stderr]    --> ch02/src/lib.rs:116:14
[INFO] [stderr]     |
[INFO] [stderr] 116 |         conn.del(&session_keys)?;
[INFO] [stderr]     |              ^^^
[INFO] [stderr] help: use `()` annotations to avoid fallback changes
[INFO] [stderr]     |
[INFO] [stderr] 116 ~         conn.del::<_, ()>(&session_keys)?;
[INFO] [stderr] 117 ~         conn.hdel::<_, _, ()>("login:", &sessions)?;
[INFO] [stderr] 118 ~         conn.zrem::<_, _, ()>("recent:", &sessions)?;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: this function depends on never type fallback being `()`
[INFO] [stderr]    --> ch02/src/lib.rs:123:1
[INFO] [stderr]     |
[INFO] [stderr] 123 | / pub fn cache_request(
[INFO] [stderr] 124 | |     conn: &mut Connection,
[INFO] [stderr] 125 | |     request: &str,
[INFO] [stderr] 126 | |     callback: &dyn Fn(&str) -> String,
[INFO] [stderr] 127 | | ) -> Result<String, Box<dyn Error>> {
[INFO] [stderr]     | |___________________________________^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in Rust 2024 and in a future release in all editions!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/never-type-fallback.html>
[INFO] [stderr]     = help: specify the types explicitly
[INFO] [stderr] note: in edition 2024, the requirement `!: FromRedisValue` will fail
[INFO] [stderr]    --> ch02/src/lib.rs:136:10
[INFO] [stderr]     |
[INFO] [stderr] 136 |     conn.set_ex(&page_key, &content, 300_usize)?;
[INFO] [stderr]     |          ^^^^^^
[INFO] [stderr] help: use `()` annotations to avoid fallback changes
[INFO] [stderr]     |
[INFO] [stderr] 136 |     conn.set_ex::<_, _, ()>(&page_key, &content, 300_usize)?;
[INFO] [stderr]     |                ++++++++++++
[INFO] [stderr] 
[INFO] [stderr] warning: this function depends on never type fallback being `()`
[INFO] [stderr]    --> ch02/src/lib.rs:150:1
[INFO] [stderr]     |
[INFO] [stderr] 150 | / pub fn schedule_row_cache(
[INFO] [stderr] 151 | |     conn: &mut Connection,
[INFO] [stderr] 152 | |     row_id: &str,
[INFO] [stderr] 153 | |     delay: isize,
[INFO] [stderr] 154 | | ) -> Result<(), Box<dyn Error>> {
[INFO] [stderr]     | |_______________________________^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in Rust 2024 and in a future release in all editions!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/never-type-fallback.html>
[INFO] [stderr]     = help: specify the types explicitly
[INFO] [stderr] note: in edition 2024, the requirement `!: FromRedisValue` will fail
[INFO] [stderr]    --> ch02/src/lib.rs:155:10
[INFO] [stderr]     |
[INFO] [stderr] 155 |     conn.zadd("delay:", row_id, delay)?;
[INFO] [stderr]     |          ^^^^
[INFO] [stderr] help: use `()` annotations to avoid fallback changes
[INFO] [stderr]     |
[INFO] [stderr] 155 ~     conn.zadd::<_, _, _, ()>("delay:", row_id, delay)?;
[INFO] [stderr] 156 |     let now = SystemTime::now().duration_since(UNIX_EPOCH)?.as_millis() as isize;
[INFO] [stderr] 157 ~     conn.zadd::<_, _, _, ()>("schedule:", row_id, now)?;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: this function depends on never type fallback being `()`
[INFO] [stderr]    --> ch02/src/lib.rs:161:1
[INFO] [stderr]     |
[INFO] [stderr] 161 | pub fn cache_rows(conn: &mut Connection, quit: Arc<AtomicBool>) -> Result<(), Box<dyn Error>> {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in Rust 2024 and in a future release in all editions!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/never-type-fallback.html>
[INFO] [stderr]     = help: specify the types explicitly
[INFO] [stderr] note: in edition 2024, the requirement `!: FromRedisValue` will fail
[INFO] [stderr]    --> ch02/src/lib.rs:176:18
[INFO] [stderr]     |
[INFO] [stderr] 176 |             conn.zrem("delay:", &row_id)?;
[INFO] [stderr]     |                  ^^^^
[INFO] [stderr] help: use `()` annotations to avoid fallback changes
[INFO] [stderr]     |
[INFO] [stderr] 176 ~             conn.zrem::<_, _, ()>("delay:", &row_id)?;
[INFO] [stderr] 177 ~             conn.zrem::<_, _, ()>("schedule:", &row_id)?;
[INFO] [stderr] 178 ~             conn.del::<_, ()>(&inv)?;
[INFO] [stderr] 179 |             continue;
[INFO] [stderr] ...
[INFO] [stderr] 184 |         let row = Inventory::get(&row_id);
[INFO] [stderr] 185 ~         conn.zadd::<_, _, _, ()>("schedule:", &row_id, now + delay)?;
[INFO] [stderr] 186 ~         conn.set::<_, _, ()>(&inv, serde_json::to_string(&row)?)?;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: this function depends on never type fallback being `()`
[INFO] [stderr]    --> ch02/src/lib.rs:191:1
[INFO] [stderr]     |
[INFO] [stderr] 191 | / pub fn rescale_viewed(
[INFO] [stderr] 192 | |     conn: &mut Connection,
[INFO] [stderr] 193 | |     quit: Arc<AtomicBool>,
[INFO] [stderr] 194 | | ) -> Result<bool, Box<dyn Error>> {
[INFO] [stderr]     | |_________________________________^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in Rust 2024 and in a future release in all editions!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/never-type-fallback.html>
[INFO] [stderr]     = help: specify the types explicitly
[INFO] [stderr] note: in edition 2024, the requirement `!: FromRedisValue` will fail
[INFO] [stderr]    --> ch02/src/lib.rs:196:14
[INFO] [stderr]     |
[INFO] [stderr] 196 |         conn.zremrangebyrank("viewed:", 20000, -1)?;
[INFO] [stderr]     |              ^^^^^^^^^^^^^^^
[INFO] [stderr] help: use `()` annotations to avoid fallback changes
[INFO] [stderr]     |
[INFO] [stderr] 196 ~         conn.zremrangebyrank::<_, ()>("viewed:", 20000, -1)?;
[INFO] [stderr] 197 ~         conn.zinterstore_weights::<_, _, ()>("viewed:", &[("viewed", 0.5)])?;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: `ch02` (lib) generated 8 warnings (run `cargo fix --lib -p ch02` to apply 8 suggestions)
[INFO] [stderr] warning: `ch02` (lib test) generated 8 warnings (8 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.08s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: ch01 v0.1.0 (/opt/rustwide/workdir/ch01), ch02 v0.1.0 (/opt/rustwide/workdir/ch02), redis v0.21.5, redis v0.21.5 (https://github.com/ndd7xv/redis-rs?branch=z-weights#bbe06834)
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 4`
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/ch01-02ca3c315e65f546)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test tests::test_article_functionality ... FAILED
[INFO] [stderr] error: test failed, to rerun pass `-p ch01 --lib`
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- tests::test_article_functionality stdout ----
[INFO] [stdout] 
[INFO] [stdout] thread 'tests::test_article_functionality' (17) panicked at ch01/src/lib.rs:176:14:
[INFO] [stdout] Should be able to Establish Connection: Connection refused (os error 111)
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x5ee7803b5b32 - std::backtrace_rs::backtrace::libunwind::trace::hf0bd46b30bc61685
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stdout]    1:     0x5ee7803b5b32 - std::backtrace_rs::backtrace::trace_unsynchronized::h1d1fbb72ad89d7b7
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stdout]    2:     0x5ee7803b5b32 - std::sys::backtrace::_print_fmt::he38b6f68ca847f47
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/backtrace.rs:74:9
[INFO] [stdout]    3:     0x5ee7803b5b32 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::hb7e843cde1bc81a3
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/backtrace.rs:44:26
[INFO] [stdout]    4:     0x5ee7803c6f0a - core::fmt::rt::Argument::fmt::hc1dd77ac64f2688c
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/fmt/rt.rs:152:76
[INFO] [stdout]    5:     0x5ee7803c6f0a - core::fmt::write::h952c506e2dbe9cff
[INFO] [stdout]    6:     0x5ee780383766 - std::io::default_write_fmt::hd23bd8145c03a23a
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/io/mod.rs:639:11
[INFO] [stdout]    7:     0x5ee780383766 - std::io::Write::write_fmt::hdd3314a2bd8a34bd
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/io/mod.rs:1994:13
[INFO] [stdout]    8:     0x5ee780394cf9 - std::sys::backtrace::BacktraceLock::print::h1079b82381c2c252
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/backtrace.rs:47:9
[INFO] [stdout]    9:     0x5ee780394cf9 - std::panicking::default_hook::{{closure}}::h85cb76b8462c00f2
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:292:27
[INFO] [stdout]   10:     0x5ee780394b91 - std::panicking::default_hook::h0134d220cc034c02
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:316:9
[INFO] [stdout]   11:     0x5ee7802bb7ae - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hb2e68dca3970e3ca
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/alloc/src/boxed.rs:2220:9
[INFO] [stdout]   12:     0x5ee7802bb7ae - test::test_main_with_exit_callback::{{closure}}::ha7ec2063a2565ec3
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/test/src/lib.rs:145:21
[INFO] [stdout]   13:     0x5ee780394f72 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::haebee478d0f56cf4
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/alloc/src/boxed.rs:2220:9
[INFO] [stdout]   14:     0x5ee780394f72 - std::panicking::panic_with_hook::h8119b6db1fef734f
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:833:13
[INFO] [stdout]   15:     0x5ee780394db8 - std::panicking::panic_handler::{{closure}}::h24f5360b91482c0e
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:698:13
[INFO] [stdout]   16:     0x5ee7803902d9 - std::sys::backtrace::__rust_end_short_backtrace::h4e60c5cbd1bd0108
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/backtrace.rs:182:18
[INFO] [stdout]   17:     0x5ee78037835d - __rustc[e4c6931bd8050421]::rust_begin_unwind
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:689:5
[INFO] [stdout]   18:     0x5ee7803cee4c - core::panicking::panic_fmt::hb1614a3ff6840071
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/panicking.rs:80:14
[INFO] [stdout]   19:     0x5ee7803ce632 - core::result::unwrap_failed::h7d4c34940aded59c
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/result.rs:1867:5
[INFO] [stdout]   20:     0x5ee780299b70 - core::result::Result<T,E>::expect::h20077308a8c9a012
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/result.rs:1185:23
[INFO] [stdout]   21:     0x5ee78028e8fb - ch01::tests::test_article_functionality::h2dce154038104f7c
[INFO] [stdout]                                at /opt/rustwide/workdir/ch01/src/lib.rs:176:14
[INFO] [stdout]   22:     0x5ee7802900e7 - ch01::tests::test_article_functionality::{{closure}}::h2e001e88a0b985cc
[INFO] [stdout]                                at /opt/rustwide/workdir/ch01/src/lib.rs:172:36
[INFO] [stdout]   23:     0x5ee7802903d6 - core::ops::function::FnOnce::call_once::h8df04facdb219353
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x5ee7802bb5ab - core::ops::function::FnOnce::call_once::hefaf63600cd43d2a
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   25:     0x5ee7802bb5ab - test::__rust_begin_short_backtrace::he30322a73a0e9ea6
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/test/src/lib.rs:663:18
[INFO] [stdout]   26:     0x5ee7802cef7a - test::run_test_in_process::{{closure}}::hdea3ab8d0243ef36
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/test/src/lib.rs:686:74
[INFO] [stdout]   27:     0x5ee7802cef7a - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h66d192f42498ffce
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/panic/unwind_safe.rs:274:9
[INFO] [stdout]   28:     0x5ee7802cef7a - std::panicking::catch_unwind::do_call::h822e18e8d3a6bb65
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:581:40
[INFO] [stdout]   29:     0x5ee7802cef7a - std::panicking::catch_unwind::h54b1de7ceab578bf
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:544:19
[INFO] [stdout]   30:     0x5ee7802cef7a - std::panic::catch_unwind::h60c29b7a9d0246b1
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panic.rs:359:14
[INFO] [stdout]   31:     0x5ee7802cef7a - test::run_test_in_process::h6099b5f871379b13
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/test/src/lib.rs:686:27
[INFO] [stdout]   32:     0x5ee7802cef7a - test::run_test::{{closure}}::h926ce0a38281a4c8
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/test/src/lib.rs:607:43
[INFO] [stdout]   33:     0x5ee7802a93d4 - test::run_test::{{closure}}::h508de21a9afc7140
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/test/src/lib.rs:637:41
[INFO] [stdout]   34:     0x5ee7802a93d4 - std::sys::backtrace::__rust_begin_short_backtrace::h6e2f5c39ca00735a
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/backtrace.rs:166:18
[INFO] [stdout]   35:     0x5ee7802acc92 - std::thread::lifecycle::spawn_unchecked::{{closure}}::{{closure}}::h133e44f0e5802c14
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/thread/lifecycle.rs:91:13
[INFO] [stdout]   36:     0x5ee7802acc92 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h4718c1285283955c
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/panic/unwind_safe.rs:274:9
[INFO] [stdout]   37:     0x5ee7802acc92 - std::panicking::catch_unwind::do_call::h0bba3937b4892238
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:581:40
[INFO] [stdout]   38:     0x5ee7802acc92 - std::panicking::catch_unwind::h5b31cab5fb8c5d7f
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:544:19
[INFO] [stdout]   39:     0x5ee7802acc92 - std::panic::catch_unwind::hb2fa05d52ed0124e
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panic.rs:359:14
[INFO] [stdout]   40:     0x5ee7802acc92 - std::thread::lifecycle::spawn_unchecked::{{closure}}::hf401cf5ff501bd29
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/thread/lifecycle.rs:89:26
[INFO] [stdout]   41:     0x5ee7802acc92 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h160022e94ce3b0bb
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   42:     0x5ee78038b4bf - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hf234e0d1d1d272ba
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/alloc/src/boxed.rs:2206:9
[INFO] [stdout]   43:     0x5ee78038b4bf - std::sys::thread::unix::Thread::new::thread_start::h106a295241840d3b
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/thread/unix.rs:127:17
[INFO] [stdout]   44:     0x7cd93d8d4aa4 - <unknown>
[INFO] [stdout]   45:     0x7cd93d961a64 - clone
[INFO] [stdout]   46:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     tests::test_article_functionality
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.13s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "a7b5bf9698db557acbda423461037d1efe77d8d1c6b0ab0b817304716553f7d8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a7b5bf9698db557acbda423461037d1efe77d8d1c6b0ab0b817304716553f7d8", kill_on_drop: false }`
[INFO] [stdout] a7b5bf9698db557acbda423461037d1efe77d8d1c6b0ab0b817304716553f7d8
