[INFO] cloning repository https://github.com/fallra1n/rust-study
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/fallra1n/rust-study" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffallra1n%2Frust-study", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffallra1n%2Frust-study'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4c59f44f052d2bcfa4ea09db8ff8d58cabc5b313
[INFO] checking fallra1n/rust-study against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffallra1n%2Frust-study" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/fallra1n/rust-study on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/fallra1n/rust-study
[INFO] finished tweaking git repo https://github.com/fallra1n/rust-study
[INFO] tweaked toml for git repo https://github.com/fallra1n/rust-study written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/fallra1n/rust-study 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ntest_test_cases v0.9.2
[INFO] [stderr]   Downloaded ntest_timeout v0.9.2
[INFO] [stderr]   Downloaded ntest v0.9.2
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f0528923a2c0e355adbc53a7d0616f870e032dedd084586cfa1d2374e6ed0e04
[INFO] running `Command { std: "docker" "start" "-a" "f0528923a2c0e355adbc53a7d0616f870e032dedd084586cfa1d2374e6ed0e04", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f0528923a2c0e355adbc53a7d0616f870e032dedd084586cfa1d2374e6ed0e04", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f0528923a2c0e355adbc53a7d0616f870e032dedd084586cfa1d2374e6ed0e04", kill_on_drop: false }`
[INFO] [stdout] f0528923a2c0e355adbc53a7d0616f870e032dedd084586cfa1d2374e6ed0e04
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a6b3811f0c8e671902c7aa4f126049e16334803fcbbdd61b6dc315131e14fe9b
[INFO] running `Command { std: "docker" "start" "-a" "a6b3811f0c8e671902c7aa4f126049e16334803fcbbdd61b6dc315131e14fe9b", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.79
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling equivalent v1.0.1
[INFO] [stderr]    Compiling hashbrown v0.14.3
[INFO] [stderr]    Compiling toml_datetime v0.6.5
[INFO] [stderr]    Compiling winnow v0.5.40
[INFO] [stderr]    Compiling serde v1.0.197
[INFO] [stderr]    Compiling serde_json v1.0.114
[INFO] [stderr]     Checking diff v0.1.13
[INFO] [stderr]     Checking ryu v1.0.17
[INFO] [stderr]     Checking yansi v0.5.1
[INFO] [stderr]    Compiling rustix v0.38.32
[INFO] [stderr]     Checking clap_builder v4.5.2
[INFO] [stderr]     Checking regex-automata v0.4.6
[INFO] [stderr]    Compiling thiserror v1.0.58
[INFO] [stderr]     Checking bitflags v2.5.0
[INFO] [stderr]     Checking walkdir v2.5.0
[INFO] [stderr]     Checking pretty_assertions v1.4.0
[INFO] [stderr]     Checking rayon v1.10.0
[INFO] [stderr]     Checking fastrand v2.0.2
[INFO] [stderr]     Checking itertools v0.2.0 (/opt/rustwide/workdir/itertools)
[INFO] [stderr]     Checking trust v0.1.0 (/opt/rustwide/workdir/trust)
[INFO] [stderr]    Compiling indexmap v2.2.6
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling syn v2.0.55
[INFO] [stderr]     Checking regex v1.10.4
[INFO] [stderr]     Checking clap v4.5.3
[INFO] [stderr]     Checking getrandom v0.2.12
[INFO] [stderr]     Checking is-terminal v0.4.12
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]    Compiling toml_edit v0.21.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking tempfile v3.10.1
[INFO] [stderr]     Checking comm v0.1.0 (/opt/rustwide/workdir/comm)
[INFO] [stderr]     Checking conway v0.1.0 (/opt/rustwide/workdir/conway)
[INFO] [stderr]     Checking combinations v0.1.0 (/opt/rustwide/workdir/combinations)
[INFO] [stderr]    Compiling proc-macro-crate v3.1.0
[INFO] [stderr]    Compiling ntest_test_cases v0.9.2
[INFO] [stderr]    Compiling ntest_timeout v0.9.2
[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stderr]    Compiling thiserror-impl v1.0.58
[INFO] [stderr]     Checking ntest v0.9.2
[INFO] [stderr]     Checking lru-cache v0.1.0 (/opt/rustwide/workdir/lru-cache)
[INFO] [stderr]     Checking prefix v0.1.0 (/opt/rustwide/workdir/prefix)
[INFO] [stderr]     Checking min-queue v0.1.0 (/opt/rustwide/workdir/min-queue)
[INFO] [stderr]     Checking mpsc v0.1.0 (/opt/rustwide/workdir/mpsc)
[INFO] [stderr]     Checking ciborium v0.2.2
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking criterion v0.5.1
[INFO] [stderr]     Checking flatmap v0.1.0 (/opt/rustwide/workdir/flatmap)
[INFO] [stdout] warning: the item `FromIterator` is imported redundantly
[INFO] [stdout]  --> flatmap/src/lib.rs:4:27
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::{borrow::Borrow, iter::FromIterator, ops::Index};
[INFO] [stdout]   |                           ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `FromIterator` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `FromIterator` is imported redundantly
[INFO] [stdout]  --> flatmap/src/lib.rs:4:27
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::{borrow::Borrow, iter::FromIterator, ops::Index};
[INFO] [stdout]   |                           ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `FromIterator` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking examples v0.1.0 (/opt/rustwide/workdir/examples)
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `RoundOutcome`
[INFO] [stdout]  --> examples/trust.rs:2:88
[INFO] [stdout]   |
[INFO] [stdout] 2 |     CheatingAgent, CooperatingAgent, CopycatAgent, DetectiveAgent, Game, GrudgerAgent, RoundOutcome,
[INFO] [stdout]   |                                                                                        ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `prefix` is imported redundantly
[INFO] [stdout]  --> examples/prefix.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use prefix;
[INFO] [stdout]   |     ^^^^^^ the item `prefix` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `comm` is imported redundantly
[INFO] [stdout]  --> examples/comm.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use comm;
[INFO] [stdout]   |     ^^^^ the item `comm` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> examples/itertools.rs:41:13
[INFO] [stdout]    |
[INFO] [stdout] 41 |         let mut base = data.iter();
[INFO] [stdout]    |             ----^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 47.24s
[INFO] running `Command { std: "docker" "inspect" "a6b3811f0c8e671902c7aa4f126049e16334803fcbbdd61b6dc315131e14fe9b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a6b3811f0c8e671902c7aa4f126049e16334803fcbbdd61b6dc315131e14fe9b", kill_on_drop: false }`
[INFO] [stdout] a6b3811f0c8e671902c7aa4f126049e16334803fcbbdd61b6dc315131e14fe9b