[INFO] fetching crate ev3robot 0.3.1...
[INFO] testing ev3robot-0.3.1 against 1.100.0-beta.1 for beta-1.100-4
[INFO] extracting crate ev3robot 0.3.1 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate ev3robot 0.3.1
[INFO] finished tweaking crates.io crate ev3robot 0.3.1
[INFO] tweaked toml for crates.io crate ev3robot 0.3.1 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate ev3robot 0.3.1 on toolchain 1.100.0-beta.1
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.100.0-beta.1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.100.0-beta.1" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 21 packages to highest compatible versions
[INFO] [stderr]       Adding bitflags v1.3.2 (available: v2.13.2)
[INFO] [stderr]       Adding derive_more v0.99.20 (available: v2.1.1)
[INFO] [stderr]       Adding thiserror v1.0.69 (available: v2.0.21)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.100.0-beta.1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:77db811e55d90add9212f6832c23229e3de5f1c1f9905e8cb07319ea15df73ac" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 19596a11e0356495f3faab3a5a1e23ba05618b2bead118812c17f0e3232aa6cc
[INFO] running `Command { std: "docker" "start" "19596a11e0356495f3faab3a5a1e23ba05618b2bead118812c17f0e3232aa6cc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "19596a11e0356495f3faab3a5a1e23ba05618b2bead118812c17f0e3232aa6cc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "19596a11e0356495f3faab3a5a1e23ba05618b2bead118812c17f0e3232aa6cc" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "19596a11e0356495f3faab3a5a1e23ba05618b2bead118812c17f0e3232aa6cc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "19596a11e0356495f3faab3a5a1e23ba05618b2bead118812c17f0e3232aa6cc" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-ident v1.0.26
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling strsim v0.10.0
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]    Compiling thiserror v1.0.69
[INFO] [stderr]    Compiling convert_case v0.4.0
[INFO] [stderr]    Compiling tap v1.0.1
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling proc-macro2 v1.0.107
[INFO] [stderr]    Compiling quote v1.0.47
[INFO] [stderr]    Compiling syn v2.0.119
[INFO] [stderr]    Compiling thiserror-impl v1.0.69
[INFO] [stderr]    Compiling derive_more v0.99.20
[INFO] [stderr]    Compiling darling_core v0.14.4
[INFO] [stderr]    Compiling darling_macro v0.14.4
[INFO] [stderr]    Compiling darling v0.14.4
[INFO] [stderr]    Compiling ev3robot_macros v0.3.1
[INFO] [stderr]    Compiling ev3robot v0.3.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0277]: a value of type `!` cannot be built from an iterator over elements of type `()`
[INFO] [stdout]   --> src/motor/bunch.rs:48:14
[INFO] [stdout]    |
[INFO] [stdout] 48 |         self.exec(|it| it.is_running().map(|b| is_running |= b))?;
[INFO] [stdout]    |              ^^^^ value of type `!` cannot be built from `std::iter::Iterator<Item=()>`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `FromIterator<()>` is not implemented for `!`
[INFO] [stdout]    = note: this error might have been caused by changes to Rust's type-inference algorithm (see issue #148922 <https://github.com/rust-lang/rust/issues/148922> for more information)
[INFO] [stdout]    = help: you might have intended to use the type `()` here instead
[INFO] [stdout] note: required by a bound in `MotorsBunch::<Motor>::exec`
[INFO] [stdout]   --> src/motor/bunch.rs:23:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | impl<Motor> MotorsBunch<Motor> {
[INFO] [stdout] ...
[INFO] [stdout] 20 |     pub fn exec<'a, T, U, F>(&'a mut self, f: F) -> anyhow::Result<U>
[INFO] [stdout] ...
[INFO] [stdout] 23 |         U: FromIterator<T>,
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^ required by this bound in `MotorsBunch::<Motor>::exec`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: a value of type `!` cannot be built from an iterator over elements of type `()`
[INFO] [stdout]   --> src/motor/bunch.rs:56:14
[INFO] [stdout]    |
[INFO] [stdout] 56 |         self.exec(|it| it.is_holding().map(|b| is_holding |= b))?;
[INFO] [stdout]    |              ^^^^ value of type `!` cannot be built from `std::iter::Iterator<Item=()>`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `FromIterator<()>` is not implemented for `!`
[INFO] [stdout]    = note: this error might have been caused by changes to Rust's type-inference algorithm (see issue #148922 <https://github.com/rust-lang/rust/issues/148922> for more information)
[INFO] [stdout]    = help: you might have intended to use the type `()` here instead
[INFO] [stdout] note: required by a bound in `MotorsBunch::<Motor>::exec`
[INFO] [stdout]   --> src/motor/bunch.rs:23:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | impl<Motor> MotorsBunch<Motor> {
[INFO] [stdout] ...
[INFO] [stdout] 20 |     pub fn exec<'a, T, U, F>(&'a mut self, f: F) -> anyhow::Result<U>
[INFO] [stdout] ...
[INFO] [stdout] 23 |         U: FromIterator<T>,
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^ required by this bound in `MotorsBunch::<Motor>::exec`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ev3robot` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "19596a11e0356495f3faab3a5a1e23ba05618b2bead118812c17f0e3232aa6cc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "19596a11e0356495f3faab3a5a1e23ba05618b2bead118812c17f0e3232aa6cc", kill_on_drop: false }`
[INFO] [stdout] 19596a11e0356495f3faab3a5a1e23ba05618b2bead118812c17f0e3232aa6cc