[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-2025-09-21 for beta-1.91-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fndd7xv%2Fredis-in-action-rs" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-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-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/ndd7xv/redis-in-action-rs on toolchain beta-2025-09-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "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-2025-09-21" "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] 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-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7a578dcd481fbdb158d3534d211a6327a9a2054eeeb36edf3dd8d950e262a569
[INFO] running `Command { std: "docker" "start" "-a" "7a578dcd481fbdb158d3534d211a6327a9a2054eeeb36edf3dd8d950e262a569", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7a578dcd481fbdb158d3534d211a6327a9a2054eeeb36edf3dd8d950e262a569", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7a578dcd481fbdb158d3534d211a6327a9a2054eeeb36edf3dd8d950e262a569", kill_on_drop: false }`
[INFO] [stdout] 7a578dcd481fbdb158d3534d211a6327a9a2054eeeb36edf3dd8d950e262a569
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 750e5a7889b060110707e419429a418ec1719ab6d5f9711d7fee938586bc8be0
[INFO] running `Command { std: "docker" "start" "-a" "750e5a7889b060110707e419429a418ec1719ab6d5f9711d7fee938586bc8be0", 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] 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 syn v1.0.96
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling unicode-bidi v0.3.8
[INFO] [stderr]    Compiling sha1_smol v1.0.0
[INFO] [stderr]    Compiling serde v1.0.137
[INFO] [stderr]    Compiling async-trait v0.1.56
[INFO] [stderr]    Compiling ryu v1.0.10
[INFO] [stderr]    Compiling itoa v1.0.2
[INFO] [stderr]    Compiling serde_json v1.0.81
[INFO] [stderr]    Compiling unicode-normalization v0.1.19
[INFO] [stderr]    Compiling urlparse v0.7.3
[INFO] [stderr]    Compiling getrandom v0.2.6
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]    Compiling sha1 v0.6.1
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]    Compiling idna v0.2.3
[INFO] [stderr]    Compiling combine v4.6.4
[INFO] [stderr]    Compiling url v2.2.2
[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] [stderr]    Compiling ch02 v0.1.0 (/opt/rustwide/workdir/ch02)
[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]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 15.96s
[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 1`
[INFO] running `Command { std: "docker" "inspect" "750e5a7889b060110707e419429a418ec1719ab6d5f9711d7fee938586bc8be0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "750e5a7889b060110707e419429a418ec1719ab6d5f9711d7fee938586bc8be0", kill_on_drop: false }`
[INFO] [stdout] 750e5a7889b060110707e419429a418ec1719ab6d5f9711d7fee938586bc8be0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5ecb195ea0333ded9ef13d6e269a2fa008d263ab109c2c9884ebd0c7d71b51d2
[INFO] running `Command { std: "docker" "start" "-a" "5ecb195ea0333ded9ef13d6e269a2fa008d263ab109c2c9884ebd0c7d71b51d2", 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] 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] [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] [stderr]    Compiling ch01 v0.1.0 (/opt/rustwide/workdir/ch01)
[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]   --> 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]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.79s
[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 2`
[INFO] running `Command { std: "docker" "inspect" "5ecb195ea0333ded9ef13d6e269a2fa008d263ab109c2c9884ebd0c7d71b51d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5ecb195ea0333ded9ef13d6e269a2fa008d263ab109c2c9884ebd0c7d71b51d2", kill_on_drop: false }`
[INFO] [stdout] 5ecb195ea0333ded9ef13d6e269a2fa008d263ab109c2c9884ebd0c7d71b51d2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 18c8c59da61f1b49c1b0f7c906c4a97f596f780147f9f0ff8f1944bcf1772e5d
[INFO] running `Command { std: "docker" "start" "-a" "18c8c59da61f1b49c1b0f7c906c4a97f596f780147f9f0ff8f1944bcf1772e5d", 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] 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]   --> 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: 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: `ch02` (lib test) generated 8 warnings (8 duplicates)
[INFO] [stderr] warning: `ch01` (lib test) generated 4 warnings (4 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.06s
[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] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/ch01-ce063b9a1c9efdc3)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test tests::test_article_functionality ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- tests::test_article_functionality stdout ----
[INFO] [stdout] 
[INFO] [stdout] thread 'tests::test_article_functionality' (25) 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:     0x5b4724b38da2 - std::backtrace_rs::backtrace::libunwind::trace::hcab59e1e990fdc24
[INFO] [stdout]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stdout]    1:     0x5b4724b38da2 - std::backtrace_rs::backtrace::trace_unsynchronized::he24cc57f3d2f47b7
[INFO] [stdout]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stdout]    2:     0x5b4724b38da2 - std::sys::backtrace::_print_fmt::hf8d65ede198eeb54
[INFO] [stdout]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/sys/backtrace.rs:66:9
[INFO] [stdout]    3:     0x5b4724b38da2 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h67edf0e4d33c343c
[INFO] [stdout]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/sys/backtrace.rs:39:26
[INFO] [stdout]    4:     0x5b4724b4a2af - core::fmt::rt::Argument::fmt::hef94184842aeafdd
[INFO] [stdout]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/core/src/fmt/rt.rs:173:76
[INFO] [stdout]    5:     0x5b4724b4a2af - core::fmt::write::hcf0c66b48a8fa606
[INFO] [stdout]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/core/src/fmt/mod.rs:1468:25
[INFO] [stdout]    6:     0x5b4724b05151 - std::io::default_write_fmt::h69967ac0ba93195f
[INFO] [stdout]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/io/mod.rs:639:11
[INFO] [stdout]    7:     0x5b4724b05151 - std::io::Write::write_fmt::h8db9396209deaa1c
[INFO] [stdout]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/io/mod.rs:1954:13
[INFO] [stdout]    8:     0x5b4724b11ed2 - std::sys::backtrace::BacktraceLock::print::h07e5435aa717b414
[INFO] [stdout]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/sys/backtrace.rs:42:9
[INFO] [stdout]    9:     0x5b4724b16a8f - std::panicking::default_hook::{{closure}}::h91001850288db5f7
[INFO] [stdout]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/panicking.rs:301:27
[INFO] [stdout]   10:     0x5b4724b16921 - std::panicking::default_hook::h2346dbb704ef5512
[INFO] [stdout]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/panicking.rs:325:9
[INFO] [stdout]   11:     0x5b4724a3116e - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h18383b2e29377420
[INFO] [stdout]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/alloc/src/boxed.rs:1999:9
[INFO] [stdout]   12:     0x5b4724a3116e - test::test_main_with_exit_callback::{{closure}}::h272d7ef99aef06dc
[INFO] [stdout]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/test/src/lib.rs:145:21
[INFO] [stdout]   13:     0x5b4724b1714f - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h6dba6e441651a0d1
[INFO] [stdout]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/alloc/src/boxed.rs:1999:9
[INFO] [stdout]   14:     0x5b4724b1714f - std::panicking::panic_with_hook::hd2b063a6090d23a4
[INFO] [stdout]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/panicking.rs:842:13
[INFO] [stdout]   15:     0x5b4724b16faa - std::panicking::panic_handler::{{closure}}::he666d95f139a333e
[INFO] [stdout]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/panicking.rs:707:13
[INFO] [stdout]   16:     0x5b4724b12009 - std::sys::backtrace::__rust_end_short_backtrace::h631ad224854ebee5
[INFO] [stdout]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/sys/backtrace.rs:174:18
[INFO] [stdout]   17:     0x5b4724af941d - __rustc[1d67440d6e82e4f]::rust_begin_unwind
[INFO] [stdout]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/panicking.rs:698:5
[INFO] [stdout]   18:     0x5b4724b528f0 - core::panicking::panic_fmt::h420ddb7fd73daf53
[INFO] [stdout]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/core/src/panicking.rs:75:14
[INFO] [stdout]   19:     0x5b4724b51e96 - core::result::unwrap_failed::hdde076be853d034f
[INFO] [stdout]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/core/src/result.rs:1855:5
[INFO] [stdout]   20:     0x5b4724a0c6c0 - core::result::Result<T,E>::expect::hba6f3102ba478e61
[INFO] [stdout]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/core/src/result.rs:1178:23
[INFO] [stdout]   21:     0x5b4724a01a9b - ch01::tests::test_article_functionality::h4d15c6e70bfaeb55
[INFO] [stdout]                                at /opt/rustwide/workdir/ch01/src/lib.rs:176:14
[INFO] [stdout]   22:     0x5b4724a03197 - ch01::tests::test_article_functionality::{{closure}}::h94746c3e53e29ca1
[INFO] [stdout]                                at /opt/rustwide/workdir/ch01/src/lib.rs:172:36
[INFO] [stdout]   23:     0x5b4724a035d6 - core::ops::function::FnOnce::call_once::hc1fd6dc44a7e149e
[INFO] [stdout]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x5b4724a30f2b - core::ops::function::FnOnce::call_once::h70887edf07a630ba
[INFO] [stdout]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   25:     0x5b4724a30f2b - test::__rust_begin_short_backtrace::h27763c4cbbdb8601
[INFO] [stdout]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/test/src/lib.rs:663:18
[INFO] [stdout]   26:     0x5b4724a46b95 - test::run_test_in_process::{{closure}}::h4dc8bc6d5e3924d3
[INFO] [stdout]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/test/src/lib.rs:686:74
[INFO] [stdout]   27:     0x5b4724a46b95 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h75905e8ffe81974f
[INFO] [stdout]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/core/src/panic/unwind_safe.rs:274:9
[INFO] [stdout]   28:     0x5b4724a46b95 - std::panicking::catch_unwind::do_call::h0bc60366ba66eba5
[INFO] [stdout]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/panicking.rs:590:40
[INFO] [stdout]   29:     0x5b4724a46b95 - std::panicking::catch_unwind::hae1ec7bf94407afa
[INFO] [stdout]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/panicking.rs:553:19
[INFO] [stdout]   30:     0x5b4724a46b95 - std::panic::catch_unwind::h0f4ff4773d84d3cd
[INFO] [stdout]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/panic.rs:359:14
[INFO] [stdout]   31:     0x5b4724a46b95 - test::run_test_in_process::h03fbc77ae48b3f10
[INFO] [stdout]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/test/src/lib.rs:686:27
[INFO] [stdout]   32:     0x5b4724a46b95 - test::run_test::{{closure}}::h83476a9c453dc4d3
[INFO] [stdout]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/test/src/lib.rs:607:43
[INFO] [stdout]   33:     0x5b4724a1d384 - test::run_test::{{closure}}::h515482ad1e7fe7de
[INFO] [stdout]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/test/src/lib.rs:637:41
[INFO] [stdout]   34:     0x5b4724a1d384 - std::sys::backtrace::__rust_begin_short_backtrace::hed09f6ac5fe9d647
[INFO] [stdout]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/sys/backtrace.rs:158:18
[INFO] [stdout]   35:     0x5b4724a20c4a - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::h988e2cd969319888
[INFO] [stdout]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/thread/mod.rs:559:17
[INFO] [stdout]   36:     0x5b4724a20c4a - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hd70e28dc46ec20be
[INFO] [stdout]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/core/src/panic/unwind_safe.rs:274:9
[INFO] [stdout]   37:     0x5b4724a20c4a - std::panicking::catch_unwind::do_call::hdc29e11311eb7655
[INFO] [stdout]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/panicking.rs:590:40
[INFO] [stdout]   38:     0x5b4724a20c4a - std::panicking::catch_unwind::h9e402d6a96fef41c
[INFO] [stdout]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/panicking.rs:553:19
[INFO] [stdout]   39:     0x5b4724a20c4a - std::panic::catch_unwind::h9213c0c54aec70e0
[INFO] [stdout]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/panic.rs:359:14
[INFO] [stdout]   40:     0x5b4724a20c4a - std::thread::Builder::spawn_unchecked_::{{closure}}::h6262965869ed2b87
[INFO] [stdout]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/thread/mod.rs:557:30
[INFO] [stdout]   41:     0x5b4724a20c4a - core::ops::function::FnOnce::call_once{{vtable.shim}}::h05c05ed02619e462
[INFO] [stdout]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   42:     0x5b4724b0d16f - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h2044e71c41d3958a
[INFO] [stdout]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/alloc/src/boxed.rs:1985:9
[INFO] [stdout]   43:     0x5b4724b0d16f - std::sys::thread::unix::Thread::new::thread_start::hf277835320aa8e5a
[INFO] [stdout]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/sys/thread/unix.rs:126:17
[INFO] [stdout]   44:     0x7b4b8a6cdaa4 - <unknown>
[INFO] [stdout]   45:     0x7b4b8a75aa34 - 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 0.03s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `-p ch01 --lib`
[INFO] running `Command { std: "docker" "inspect" "18c8c59da61f1b49c1b0f7c906c4a97f596f780147f9f0ff8f1944bcf1772e5d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "18c8c59da61f1b49c1b0f7c906c4a97f596f780147f9f0ff8f1944bcf1772e5d", kill_on_drop: false }`
[INFO] [stdout] 18c8c59da61f1b49c1b0f7c906c4a97f596f780147f9f0ff8f1944bcf1772e5d
