[INFO] cloning repository https://github.com/DanielKeep/calendar-example
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/DanielKeep/calendar-example" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDanielKeep%2Fcalendar-example", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDanielKeep%2Fcalendar-example'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 399f1b0fafac49df5e52a57b350a9c8b09ea046b
[INFO] checking DanielKeep/calendar-example against master#779e19d8baa3e3625bd4fc5c85cbb2ad47b43155 for pr-147589-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDanielKeep%2Fcalendar-example" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/DanielKeep/calendar-example
[INFO] finished tweaking git repo https://github.com/DanielKeep/calendar-example
[INFO] tweaked toml for git repo https://github.com/DanielKeep/calendar-example written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/DanielKeep/calendar-example on toolchain 779e19d8baa3e3625bd4fc5c85cbb2ad47b43155
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+779e19d8baa3e3625bd4fc5c85cbb2ad47b43155" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/DanielKeep/calendar-example 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" "+779e19d8baa3e3625bd4fc5c85cbb2ad47b43155" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded num-traits v0.1.34
[INFO] [stderr]   Downloaded time v0.1.35
[INFO] [stderr]   Downloaded num-integer v0.1.32
[INFO] [stderr]   Downloaded num-iter v0.1.32
[INFO] [stderr]   Downloaded num v0.1.34
[INFO] [stderr]   Downloaded libc v0.2.15
[INFO] [stderr]   Downloaded chrono v0.2.25
[INFO] [stderr]   Downloaded itertools v0.4.17
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+779e19d8baa3e3625bd4fc5c85cbb2ad47b43155" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0f64c255e6296561ab37765ce2f8d743e3f196646df305470a575dc18bf6e9c5
[INFO] running `Command { std: "docker" "start" "-a" "0f64c255e6296561ab37765ce2f8d743e3f196646df305470a575dc18bf6e9c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0f64c255e6296561ab37765ce2f8d743e3f196646df305470a575dc18bf6e9c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0f64c255e6296561ab37765ce2f8d743e3f196646df305470a575dc18bf6e9c5", kill_on_drop: false }`
[INFO] [stdout] 0f64c255e6296561ab37765ce2f8d743e3f196646df305470a575dc18bf6e9c5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+779e19d8baa3e3625bd4fc5c85cbb2ad47b43155" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ab90e4ec7ed26c28b32df6edaa05467ff8b8b2316b06001f354a4246fa002d05
[INFO] running `Command { std: "docker" "start" "-a" "ab90e4ec7ed26c28b32df6edaa05467ff8b8b2316b06001f354a4246fa002d05", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]     Checking num-traits v0.1.34
[INFO] [stderr]     Checking libc v0.2.15
[INFO] [stderr]     Checking itertools v0.4.17
[INFO] [stderr]     Checking num-integer v0.1.32
[INFO] [stderr]     Checking time v0.1.35
[INFO] [stderr]     Checking num-iter v0.1.32
[INFO] [stderr]     Checking num v0.1.34
[INFO] [stderr]     Checking chrono v0.2.25
[INFO] [stderr]     Checking calendar v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0562]: `impl Trait` is not allowed in the return type of `Fn` trait bounds
[INFO] [stdout]    --> bin.rs:386:23
[INFO] [stdout]     |
[INFO] [stdout] 386 | -> impl FnOnce(It) -> impl Iterator<Item=String>
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `impl Trait` is only allowed in arguments and return types of functions and methods
[INFO] [stdout]     = note: see issue #99697 <https://github.com/rust-lang/rust/issues/99697> for more information
[INFO] [stdout]     = help: add `#![feature(impl_trait_in_fn_trait_return)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2025-10-16; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0562]: `impl Trait` is not allowed in the return type of `Fn` trait bounds
[INFO] [stdout]    --> bin.rs:456:57
[INFO] [stdout]     |
[INFO] [stdout] 456 | fn chunks<It: Iterator>(n: usize) -> impl FnOnce(It) -> impl Iterator<Item=Vec<It::Item>> {
[INFO] [stdout]     |                                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `impl Trait` is only allowed in arguments and return types of functions and methods
[INFO] [stdout]     = note: see issue #99697 <https://github.com/rust-lang/rust/issues/99697> for more information
[INFO] [stdout]     = help: add `#![feature(impl_trait_in_fn_trait_return)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2025-10-16; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `conservative_impl_trait` has been stable since 1.26.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> bin.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(conservative_impl_trait)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> bin.rs:506:15
[INFO] [stdout]     |
[INFO] [stdout] 506 |         .map(|r| r.into_iter()
[INFO] [stdout]     |               ^  - type must be known at this point
[INFO] [stdout]     |
[INFO] [stdout] help: consider giving this closure parameter an explicit type
[INFO] [stdout]     |
[INFO] [stdout] 506 |         .map(|r: /* Type */| r.into_iter()
[INFO] [stdout]     |                ++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `calendar` (bin "calendar") due to 3 previous errors; 1 warning emitted
[INFO] [stdout] Some errors have detailed explanations: E0282, E0562.
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] For more information about an error, try `rustc --explain E0282`.
[INFO] [stdout] 
[INFO] [stdout] error[E0562]: `impl Trait` is not allowed in the return type of `Fn` trait bounds
[INFO] [stdout]    --> bin.rs:386:23
[INFO] [stdout]     |
[INFO] [stdout] 386 | -> impl FnOnce(It) -> impl Iterator<Item=String>
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `impl Trait` is only allowed in arguments and return types of functions and methods
[INFO] [stdout]     = note: see issue #99697 <https://github.com/rust-lang/rust/issues/99697> for more information
[INFO] [stdout]     = help: add `#![feature(impl_trait_in_fn_trait_return)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2025-10-16; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0562]: `impl Trait` is not allowed in the return type of `Fn` trait bounds
[INFO] [stdout]    --> bin.rs:456:57
[INFO] [stdout]     |
[INFO] [stdout] 456 | fn chunks<It: Iterator>(n: usize) -> impl FnOnce(It) -> impl Iterator<Item=Vec<It::Item>> {
[INFO] [stdout]     |                                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `impl Trait` is only allowed in arguments and return types of functions and methods
[INFO] [stdout]     = note: see issue #99697 <https://github.com/rust-lang/rust/issues/99697> for more information
[INFO] [stdout]     = help: add `#![feature(impl_trait_in_fn_trait_return)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2025-10-16; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `conservative_impl_trait` has been stable since 1.26.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> bin.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(conservative_impl_trait)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> bin.rs:506:15
[INFO] [stdout]     |
[INFO] [stdout] 506 |         .map(|r| r.into_iter()
[INFO] [stdout]     |               ^  - type must be known at this point
[INFO] [stdout]     |
[INFO] [stdout] help: consider giving this closure parameter an explicit type
[INFO] [stdout]     |
[INFO] [stdout] 506 |         .map(|r: /* Type */| r.into_iter()
[INFO] [stdout]     |                ++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0282, E0562.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0282`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `calendar` (bin "calendar" test) due to 3 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "ab90e4ec7ed26c28b32df6edaa05467ff8b8b2316b06001f354a4246fa002d05", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ab90e4ec7ed26c28b32df6edaa05467ff8b8b2316b06001f354a4246fa002d05", kill_on_drop: false }`
[INFO] [stdout] ab90e4ec7ed26c28b32df6edaa05467ff8b8b2316b06001f354a4246fa002d05
