[INFO] cloning repository https://github.com/hardglitch/xmath
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/hardglitch/xmath" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhardglitch%2Fxmath", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhardglitch%2Fxmath'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bda74b1d575c7c65e13558c361f26947597295aa
[INFO] testing hardglitch/xmath against try#dec9417b8611e34e787a3e4c37686b5131f9e5c5 for pr-154210-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhardglitch%2Fxmath" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/hardglitch/xmath
[INFO] finished tweaking git repo https://github.com/hardglitch/xmath
[INFO] tweaked toml for git repo https://github.com/hardglitch/xmath written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/hardglitch/xmath on toolchain dec9417b8611e34e787a3e4c37686b5131f9e5c5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/hardglitch/xmath 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" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 23b63c38b0dbc70a3be57fe35a818405a2c270748e28feb09afa10d9382d854a
[INFO] running `Command { std: "docker" "start" "-a" "23b63c38b0dbc70a3be57fe35a818405a2c270748e28feb09afa10d9382d854a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "23b63c38b0dbc70a3be57fe35a818405a2c270748e28feb09afa10d9382d854a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "23b63c38b0dbc70a3be57fe35a818405a2c270748e28feb09afa10d9382d854a", kill_on_drop: false }`
[INFO] [stdout] 23b63c38b0dbc70a3be57fe35a818405a2c270748e28feb09afa10d9382d854a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fcd4d87adb740546a34f2387578bea06b2272bfc3e0e1bc3a7eefd44bf43f6a4
[INFO] running `Command { std: "docker" "start" "-a" "fcd4d87adb740546a34f2387578bea06b2272bfc3e0e1bc3a7eefd44bf43f6a4", kill_on_drop: false }`
[INFO] [stderr]    Compiling xmath v0.5.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]   --> src/aprogression.rs:68:11
[INFO] [stdout]    |
[INFO] [stdout] 68 |     while let s = sum_by_d(base, 1, *n, d) && s.ok() < Some(sum) {
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]   --> src/im/core.rs:64:12
[INFO] [stdout]    |
[INFO] [stdout] 64 |         if let Some(b) = &mut self.mixed_base && b.len() == 1 &&
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]   --> src/im/core.rs:65:13
[INFO] [stdout]    |
[INFO] [stdout] 65 |             let Some(e) = b.first_mut()
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]   --> src/im/core.rs:73:12
[INFO] [stdout]    |
[INFO] [stdout] 73 |         if let Some(b) = &self.mixed_pow && b.len() == 1 &&
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]   --> src/im/core.rs:74:13
[INFO] [stdout]    |
[INFO] [stdout] 74 |             let Some(e) = b.first()
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]   --> src/im/core.rs:82:12
[INFO] [stdout]    |
[INFO] [stdout] 82 |         if let Some(b) = &mut self.mixed_pow && b.len() == 1 &&
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]   --> src/im/core.rs:83:13
[INFO] [stdout]    |
[INFO] [stdout] 83 |             let Some(e) = b.first_mut()
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]   --> src/im/core.rs:91:12
[INFO] [stdout]    |
[INFO] [stdout] 91 |         if let Some(b) = &self.mixed_mul && b.len() == 1 &&
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]   --> src/im/core.rs:92:13
[INFO] [stdout]    |
[INFO] [stdout] 92 |             let Some(e) = b.first()
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/im/core.rs:100:12
[INFO] [stdout]     |
[INFO] [stdout] 100 |         if let Some(b) = &self.mixed_base && b.len() == 1 &&
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/im/core.rs:101:13
[INFO] [stdout]     |
[INFO] [stdout] 101 |             let Some(e) = b.first()
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/im/core.rs:118:12
[INFO] [stdout]     |
[INFO] [stdout] 118 |         if let Some(v) = &mut self.mixed_pow &&
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/im/core.rs:119:13
[INFO] [stdout]     |
[INFO] [stdout] 119 |             let Some(m) = v.first_mut() {
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/im/core.rs:128:12
[INFO] [stdout]     |
[INFO] [stdout] 128 |         if let Some(v) = &mut self.mixed_mul &&
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/im/core.rs:129:13
[INFO] [stdout]     |
[INFO] [stdout] 129 |             let Some(m) = v.first_mut() {
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/im/core.rs:175:13
[INFO] [stdout]     |
[INFO] [stdout] 175 |             let Some(v) = &mut self.mixed_mul &&
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/im/core.rs:176:13
[INFO] [stdout]     |
[INFO] [stdout] 176 |             let Some(m) = v.first_mut()
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/im/core.rs:244:12
[INFO] [stdout]     |
[INFO] [stdout] 244 |         if let Some(v) = &mut self.mixed_pow &&
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/im/core.rs:245:13
[INFO] [stdout]     |
[INFO] [stdout] 245 |             let Some(p) = v.first_mut()
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/im/core.rs:257:12
[INFO] [stdout]     |
[INFO] [stdout] 257 |         if let Some(v) = &mut self.mixed_mul &&
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/im/core.rs:258:13
[INFO] [stdout]     |
[INFO] [stdout] 258 |             let Some(m) = v.first_mut()
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/im/core.rs:270:12
[INFO] [stdout]     |
[INFO] [stdout] 270 |         if let Some(v) = &mut self.mixed_base && v.len() == 1 &&
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/im/core.rs:271:13
[INFO] [stdout]     |
[INFO] [stdout] 271 |             let Some(b) = v.first_mut()
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/im/core.rs:280:17
[INFO] [stdout]     |
[INFO] [stdout] 280 |                 let Some(v) = &mut self.mixed_mul && v.len() == 1 &&
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/im/core.rs:281:21
[INFO] [stdout]     |
[INFO] [stdout] 281 |                     let Some(m) = v.first_mut()
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/im/core.rs:289:21
[INFO] [stdout]     |
[INFO] [stdout] 289 |             else if let Some(v) = &mut self.mixed_mul && v.len() == 1 &&
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/im/core.rs:290:21
[INFO] [stdout]     |
[INFO] [stdout] 290 |                     let Some(m) = v.first_mut() && m.is_simple() &&
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/im/core.rs:291:21
[INFO] [stdout]     |
[INFO] [stdout] 291 |                     let Some(v) = &mut self.mixed_pow && v.len() == 1 &&
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/im/core.rs:292:21
[INFO] [stdout]     |
[INFO] [stdout] 292 |                     let Some(p) = v.first_mut() && p.is_real()
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/im/core.rs:329:12
[INFO] [stdout]     |
[INFO] [stdout] 329 |            let Some(b) = &mut self.mixed_base &&
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/im/core.rs:330:12
[INFO] [stdout]     |
[INFO] [stdout] 330 |            let Some(fe) = b.first() &&
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/im/core.rs:331:12
[INFO] [stdout]     |
[INFO] [stdout] 331 |            let Some(se) = b.last() &&
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/im/core.rs:339:12
[INFO] [stdout]     |
[INFO] [stdout] 339 |         if let Some(v1) = &mut self.mixed_pow &&
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/im/core.rs:340:13
[INFO] [stdout]     |
[INFO] [stdout] 340 |             let Some(p1) = v1.first_mut()
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/im/core.rs:342:16
[INFO] [stdout]     |
[INFO] [stdout] 342 |             if let Some(v2) = &mut rhs.mixed_pow &&
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/im/core.rs:343:17
[INFO] [stdout]     |
[INFO] [stdout] 343 |                 let Some(p2) = v2.first_mut()
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/im/core.rs:359:12
[INFO] [stdout]     |
[INFO] [stdout] 359 |         if let Some(v1) = &mut self.mixed_pow &&
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/im/core.rs:360:13
[INFO] [stdout]     |
[INFO] [stdout] 360 |             let Some(p1) = v1.first_mut()
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/im/core.rs:362:16
[INFO] [stdout]     |
[INFO] [stdout] 362 |             if let Some(v2) = &mut rhs.mixed_pow &&
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/im/core.rs:363:17
[INFO] [stdout]     |
[INFO] [stdout] 363 |                 let Some(p2) = v2.first_mut()
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/im/core.rs:379:12
[INFO] [stdout]     |
[INFO] [stdout] 379 |         if let Some(v1) = &mut self.mixed_mul &&
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/im/core.rs:380:13
[INFO] [stdout]     |
[INFO] [stdout] 380 |             let Some(m1) = v1.first_mut()
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/im/core.rs:382:16
[INFO] [stdout]     |
[INFO] [stdout] 382 |             if let Some(v2) = &mut rhs.mixed_mul &&
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/im/core.rs:383:17
[INFO] [stdout]     |
[INFO] [stdout] 383 |                 let Some(m2) = v2.first_mut()
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/im/core.rs:398:12
[INFO] [stdout]     |
[INFO] [stdout] 398 |         if let Some(v1) = &mut self.mixed_mul &&
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/im/core.rs:399:13
[INFO] [stdout]     |
[INFO] [stdout] 399 |             let Some(m1) = v1.first_mut()
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/im/core.rs:401:16
[INFO] [stdout]     |
[INFO] [stdout] 401 |             if let Some(v2) = &mut rhs.mixed_mul &&
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/im/core.rs:402:17
[INFO] [stdout]     |
[INFO] [stdout] 402 |                 let Some(m2) = v2.first_mut()
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/im/core.rs:413:12
[INFO] [stdout]     |
[INFO] [stdout] 413 |         if let Some(v1) = &mut self.mixed_mul &&
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/im/core.rs:414:13
[INFO] [stdout]     |
[INFO] [stdout] 414 |             let Some(m1) = v1.first_mut()
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/im/core.rs:416:16
[INFO] [stdout]     |
[INFO] [stdout] 416 |             if let Some(v2) = &mut rhs.mixed_mul &&
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/im/core.rs:417:17
[INFO] [stdout]     |
[INFO] [stdout] 417 |                 let Some(m2) = v2.first_mut()
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/im/core.rs:428:12
[INFO] [stdout]     |
[INFO] [stdout] 428 |         if let Some(v1) = &mut self.mixed_mul &&
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/im/core.rs:429:13
[INFO] [stdout]     |
[INFO] [stdout] 429 |             let Some(m1) = v1.first_mut()
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/im/core.rs:431:16
[INFO] [stdout]     |
[INFO] [stdout] 431 |             if let Some(v2) = &mut rhs.mixed_mul &&
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/im/core.rs:432:17
[INFO] [stdout]     |
[INFO] [stdout] 432 |                 let Some(m2) = v2.first_mut()
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]   --> src/im/logic.rs:45:12
[INFO] [stdout]    |
[INFO] [stdout] 45 |         if let Some(v1) = lhs &&
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]   --> src/im/logic.rs:46:13
[INFO] [stdout]    |
[INFO] [stdout] 46 |             let Some(v2) = rhs && v1.len() > v2.len()
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]   --> src/im/ops/add.rs:76:17
[INFO] [stdout]    |
[INFO] [stdout] 76 |         else if let Some(b1) = &mut self.mixed_base &&
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]   --> src/im/ops/add.rs:77:13
[INFO] [stdout]    |
[INFO] [stdout] 77 |             let Some(b2) = &mut rhs.mixed_base
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/im/ops/add.rs:148:12
[INFO] [stdout]     |
[INFO] [stdout] 148 |         if let Some(v1) = &mut lhs &&
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/im/ops/add.rs:149:13
[INFO] [stdout]     |
[INFO] [stdout] 149 |             let Some(v2) = &mut rhs
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/im/ops/mul.rs:146:12
[INFO] [stdout]     |
[INFO] [stdout] 146 |         if let Some(v1) = &mut lhs &&
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/im/ops/mul.rs:147:13
[INFO] [stdout]     |
[INFO] [stdout] 147 |             let Some(v2) = &mut rhs
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]   --> src/im/ops/sub.rs:80:12
[INFO] [stdout]    |
[INFO] [stdout] 80 |         if let Some(b1) = &mut self.mixed_base &&
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]   --> src/im/ops/sub.rs:81:12
[INFO] [stdout]    |
[INFO] [stdout] 81 |            let Some(b2) = &mut rhs.mixed_base
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/im/ops/div.rs:179:12
[INFO] [stdout]     |
[INFO] [stdout] 179 |         if let Some(v1) = &mut lhs &&
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/im/ops/div.rs:180:13
[INFO] [stdout]     |
[INFO] [stdout] 180 |             let Some(v2) = &mut rhs
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]   --> src/im/ops/pow.rs:76:13
[INFO] [stdout]    |
[INFO] [stdout] 76 |             let Some(p) = self.mixed_pow_mut()
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: let chains are only allowed in Rust 2024 or later
[INFO] [stdout]    --> src/im/output.rs:103:12
[INFO] [stdout]     |
[INFO] [stdout] 103 |         if let Some(m) = self.mixed_mul() && m.is_simple() && m.real < 0.0 {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `let_chains` has been stable since 1.88.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(let_chains)]
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `isqrt` has been stable since 1.84.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(isqrt)]
[INFO] [stdout]   |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `xmath` (lib) due to 70 previous errors; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "fcd4d87adb740546a34f2387578bea06b2272bfc3e0e1bc3a7eefd44bf43f6a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fcd4d87adb740546a34f2387578bea06b2272bfc3e0e1bc3a7eefd44bf43f6a4", kill_on_drop: false }`
[INFO] [stdout] fcd4d87adb740546a34f2387578bea06b2272bfc3e0e1bc3a7eefd44bf43f6a4