[INFO] cloning repository https://github.com/pierd/exploring-rust [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/pierd/exploring-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpierd%2Fexploring-rust", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpierd%2Fexploring-rust'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 45efc2c765042b81e68ecae4ae10c6dfc00745ba [INFO] checking pierd/exploring-rust against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpierd%2Fexploring-rust" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/pierd/exploring-rust 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/pierd/exploring-rust [INFO] finished tweaking git repo https://github.com/pierd/exploring-rust [INFO] tweaked toml for git repo https://github.com/pierd/exploring-rust written to /workspace/builds/worker-3-tc1/source/Cargo.toml [INFO] crate git repo https://github.com/pierd/exploring-rust 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] a05d75333a238ab23c754ca784fdaac710beeb402c8c5fe8c8a9704d527d4c13 [INFO] running `Command { std: "docker" "start" "-a" "a05d75333a238ab23c754ca784fdaac710beeb402c8c5fe8c8a9704d527d4c13", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "a05d75333a238ab23c754ca784fdaac710beeb402c8c5fe8c8a9704d527d4c13", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "a05d75333a238ab23c754ca784fdaac710beeb402c8c5fe8c8a9704d527d4c13", kill_on_drop: false }` [INFO] [stdout] a05d75333a238ab23c754ca784fdaac710beeb402c8c5fe8c8a9704d527d4c13 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 1b8c9d5d76c3ba4073479b7c54c7922c1e3f81db2ab7da4acbc96b27b5f728c3 [INFO] running `Command { std: "docker" "start" "-a" "1b8c9d5d76c3ba4073479b7c54c7922c1e3f81db2ab7da4acbc96b27b5f728c3", kill_on_drop: false }` [INFO] [stderr] Compiling proc-macro2 v1.0.66 [INFO] [stderr] Compiling libc v0.2.147 [INFO] [stderr] Compiling unicode-ident v1.0.11 [INFO] [stderr] Compiling serde v1.0.164 [INFO] [stderr] Compiling serde_json v1.0.99 [INFO] [stderr] Compiling lock_api v0.4.10 [INFO] [stderr] Checking itoa v1.0.9 [INFO] [stderr] Checking ryu v1.0.15 [INFO] [stderr] Compiling parking_lot_core v0.9.8 [INFO] [stderr] Compiling cc v1.0.79 [INFO] [stderr] Compiling tokio v1.29.1 [INFO] [stderr] Checking gimli v0.27.3 [INFO] [stderr] Checking rustc-demangle v0.1.23 [INFO] [stderr] Checking miniz_oxide v0.7.1 [INFO] [stderr] Checking bytes v1.4.0 [INFO] [stderr] Checking object v0.31.1 [INFO] [stderr] Checking mintex v0.1.3 [INFO] [stderr] Checking thousands v0.2.0 [INFO] [stderr] Compiling futures-core v0.3.28 [INFO] [stderr] Checking aho-corasick v1.0.2 [INFO] [stderr] Checking regex-syntax v0.7.4 [INFO] [stderr] Compiling futures-task v0.3.28 [INFO] [stderr] Compiling num-traits v0.2.16 [INFO] [stderr] Compiling futures-util v0.3.28 [INFO] [stderr] Compiling rustix v0.38.4 [INFO] [stderr] Checking either v1.9.0 [INFO] [stderr] Checking futures-sink v0.3.28 [INFO] [stderr] Compiling futures-channel v0.3.28 [INFO] [stderr] Checking anstyle v1.0.1 [INFO] [stderr] Checking clap_lex v0.5.0 [INFO] [stderr] Compiling syn v1.0.109 [INFO] [stderr] Checking half v1.8.2 [INFO] [stderr] Checking ciborium-io v0.2.1 [INFO] [stderr] Checking itertools v0.10.5 [INFO] [stderr] Checking futures-io v0.3.28 [INFO] [stderr] Checking deunicode v1.4.3 [INFO] [stderr] Checking clap_builder v4.3.19 [INFO] [stderr] Checking ciborium-ll v0.2.1 [INFO] [stderr] Compiling backtrace v0.3.68 [INFO] [stderr] Checking getrandom v0.2.10 [INFO] [stderr] Checking num_cpus v1.16.0 [INFO] [stderr] Checking signal-hook-registry v1.4.1 [INFO] [stderr] Checking mio v0.8.8 [INFO] [stderr] Checking socket2 v0.4.9 [INFO] [stderr] Compiling quote v1.0.31 [INFO] [stderr] Checking rayon-core v1.11.0 [INFO] [stderr] Checking rand_core v0.6.4 [INFO] [stderr] Checking regex-automata v0.3.3 [INFO] [stderr] Checking rand_chacha v0.3.1 [INFO] [stderr] Compiling syn v2.0.26 [INFO] [stderr] Checking is-terminal v0.4.9 [INFO] [stderr] Checking rayon v1.7.0 [INFO] [stderr] Checking rand v0.8.5 [INFO] [stderr] Checking plotters v0.3.5 [INFO] [stderr] Checking fake v2.9.2 [INFO] [stderr] Checking clap v4.3.19 [INFO] [stderr] Checking futures v0.3.28 [INFO] [stderr] Checking criterion-plot v0.5.0 [INFO] [stderr] Checking addr2line v0.20.0 [INFO] [stderr] Checking regex v1.9.1 [INFO] [stderr] Checking env_logger v0.8.4 [INFO] [stderr] Checking quickcheck v1.0.3 [INFO] [stderr] Compiling quickcheck_macros v1.0.0 [INFO] [stderr] Compiling serde_derive v1.0.164 [INFO] [stderr] Compiling tokio-macros v2.1.0 [INFO] [stderr] Compiling pin-project-internal v1.1.4 [INFO] [stderr] Checking pin-project v1.1.4 [INFO] [stderr] Checking bincode v1.3.3 [INFO] [stderr] Checking ciborium v0.2.1 [INFO] [stderr] Checking parking_lot v0.12.1 [INFO] [stderr] Checking dhat v0.3.3 [INFO] [stderr] Checking tinytemplate v1.2.1 [INFO] [stderr] Checking criterion v0.5.1 [INFO] [stderr] Checking exploring-rust v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused import: `Weak` [INFO] [stdout] --> src/bin/leaked_weak.rs:1:19 [INFO] [stdout] | [INFO] [stdout] 1 | use std::rc::{Rc, Weak}; [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait `Semigroup` is never used [INFO] [stdout] --> src/bin/monoid.rs:3:7 [INFO] [stdout] | [INFO] [stdout] 3 | trait Semigroup { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait `Monoid` is never used [INFO] [stdout] --> src/bin/monoid.rs:8:7 [INFO] [stdout] | [INFO] [stdout] 8 | trait Monoid: Semigroup { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Add` is never constructed [INFO] [stdout] --> src/bin/monoid.rs:30:8 [INFO] [stdout] | [INFO] [stdout] 30 | struct Add; [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Mul` is never constructed [INFO] [stdout] --> src/bin/monoid.rs:45:8 [INFO] [stdout] | [INFO] [stdout] 45 | struct Mul; [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Max` is never constructed [INFO] [stdout] --> src/bin/monoid.rs:60:8 [INFO] [stdout] | [INFO] [stdout] 60 | struct Max; [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `StringAppend` is never constructed [INFO] [stdout] --> src/bin/monoid.rs:90:8 [INFO] [stdout] | [INFO] [stdout] 90 | struct StringAppend; [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `TraverseFn` is never constructed [INFO] [stdout] --> src/bin/monoid.rs:179:8 [INFO] [stdout] | [INFO] [stdout] 179 | struct TraverseFn(std::marker::PhantomData<(A, B)>); [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `ComposeEndomorphism` is never constructed [INFO] [stdout] --> src/bin/monoid.rs:205:8 [INFO] [stdout] | [INFO] [stdout] 205 | struct ComposeEndomorphism(std::marker::PhantomData); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 8 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `Weak` [INFO] [stdout] --> src/bin/leaked_weak.rs:1:19 [INFO] [stdout] | [INFO] [stdout] 1 | use std::rc::{Rc, Weak}; [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: associated functions `times` and `accumulate` are never used [INFO] [stdout] --> src/bin/monoid.rs:11:8 [INFO] [stdout] | [INFO] [stdout] 8 | trait Monoid: Semigroup { [INFO] [stdout] | ------ associated functions in this trait [INFO] [stdout] ... [INFO] [stdout] 11 | fn times(a: Self::T, n: usize) -> Self::T [INFO] [stdout] | ^^^^^ [INFO] [stdout] ... [INFO] [stdout] 22 | fn accumulate(iter: I) -> Self::T [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 27.34s [INFO] running `Command { std: "docker" "inspect" "1b8c9d5d76c3ba4073479b7c54c7922c1e3f81db2ab7da4acbc96b27b5f728c3", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "1b8c9d5d76c3ba4073479b7c54c7922c1e3f81db2ab7da4acbc96b27b5f728c3", kill_on_drop: false }` [INFO] [stdout] 1b8c9d5d76c3ba4073479b7c54c7922c1e3f81db2ab7da4acbc96b27b5f728c3