[INFO] cloning repository https://github.com/lochbrunner/rust-hacks [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/lochbrunner/rust-hacks" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flochbrunner%2Frust-hacks", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flochbrunner%2Frust-hacks'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 04a14e80469215a2b365dd3d60ca86a6520cd2ad [INFO] testing lochbrunner/rust-hacks against master#caccb4d0368bd918ef6668af8e13834d07040417 for pr-146098-1 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flochbrunner%2Frust-hacks" "/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/lochbrunner/rust-hacks [INFO] finished tweaking git repo https://github.com/lochbrunner/rust-hacks [INFO] tweaked toml for git repo https://github.com/lochbrunner/rust-hacks written to /workspace/builds/worker-7-tc1/source/Cargo.toml [INFO] validating manifest of git repo https://github.com/lochbrunner/rust-hacks on toolchain caccb4d0368bd918ef6668af8e13834d07040417 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+caccb4d0368bd918ef6668af8e13834d07040417" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate git repo https://github.com/lochbrunner/rust-hacks 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" "+caccb4d0368bd918ef6668af8e13834d07040417" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [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" "+caccb4d0368bd918ef6668af8e13834d07040417" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] ca5b66a7a3490f2278adc60b32c85fcc26e8cb1729796aeddc5b4f289b183ba4 [INFO] running `Command { std: "docker" "start" "-a" "ca5b66a7a3490f2278adc60b32c85fcc26e8cb1729796aeddc5b4f289b183ba4", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "ca5b66a7a3490f2278adc60b32c85fcc26e8cb1729796aeddc5b4f289b183ba4", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "ca5b66a7a3490f2278adc60b32c85fcc26e8cb1729796aeddc5b4f289b183ba4", kill_on_drop: false }` [INFO] [stdout] ca5b66a7a3490f2278adc60b32c85fcc26e8cb1729796aeddc5b4f289b183ba4 [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" "+caccb4d0368bd918ef6668af8e13834d07040417" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] bf08924c1c3a484d3cf2a451c5925c37739ced046ed492feef7890501409297a [INFO] running `Command { std: "docker" "start" "-a" "bf08924c1c3a484d3cf2a451c5925c37739ced046ed492feef7890501409297a", kill_on_drop: false }` [INFO] [stderr] Compiling rust-hacks v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused imports: `Filter` and `Map` [INFO] [stdout] --> src/sample_map.rs:1:17 [INFO] [stdout] | [INFO] [stdout] 1 | use std::iter::{Filter, Iterator, Map}; [INFO] [stdout] | ^^^^^^ ^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/sample_map.rs:16:13 [INFO] [stdout] | [INFO] [stdout] 16 | type P = FnMut() -> S; [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see [INFO] [stdout] = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default [INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn` [INFO] [stdout] | [INFO] [stdout] 16 | type P = dyn FnMut() -> S; [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s` [INFO] [stdout] --> src/sample_map.rs:27:13 [INFO] [stdout] | [INFO] [stdout] 27 | let s = self.s.iter().nth(0).unwrap(); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_s` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `CrossJoin` is never constructed [INFO] [stdout] --> src/cross_join.rs:4:12 [INFO] [stdout] | [INFO] [stdout] 4 | pub struct CrossJoin<'a, R, L> [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated items `next_left` and `new` are never used [INFO] [stdout] --> src/cross_join.rs:19:12 [INFO] [stdout] | [INFO] [stdout] 15 | / impl<'a, R, L> CrossJoin<'a, R, L> [INFO] [stdout] 16 | | where [INFO] [stdout] 17 | | L: Iterator + Sized, [INFO] [stdout] | |________________________- associated items in this implementation [INFO] [stdout] 18 | { [INFO] [stdout] 19 | pub fn next_left(&mut self) { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 23 | pub fn new(left_iter: L, samples: &'a [R]) -> CrossJoin<'a, R, L> { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `CrossJoinItem` is never constructed [INFO] [stdout] --> src/cross_join.rs:36:12 [INFO] [stdout] | [INFO] [stdout] 36 | pub struct CrossJoinItem { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait `CrossJoinTrait` is never used [INFO] [stdout] --> src/cross_join.rs:75:11 [INFO] [stdout] | [INFO] [stdout] 75 | pub trait CrossJoinTrait: Iterator { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait `LearnTrait` is never used [INFO] [stdout] --> src/learn_iter.rs:6:11 [INFO] [stdout] | [INFO] [stdout] 6 | pub trait LearnTrait: Iterator { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `SampleMap` is never constructed [INFO] [stdout] --> src/sample_map.rs:4:12 [INFO] [stdout] | [INFO] [stdout] 4 | pub struct SampleMap<'a, I, F, S> { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function `new` is never used [INFO] [stdout] --> src/sample_map.rs:11:19 [INFO] [stdout] | [INFO] [stdout] 10 | impl<'a, I, F, S> SampleMap<'a, I, F, S> { [INFO] [stdout] | ---------------------------------------- associated function in this implementation [INFO] [stdout] 11 | pub(super) fn new(iter: I, f: F, s: &'a [S]) -> SampleMap<'a, I, F, S> { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: type alias `P` is never used [INFO] [stdout] --> src/sample_map.rs:16:6 [INFO] [stdout] | [INFO] [stdout] 16 | type P = FnMut() -> S; [INFO] [stdout] | ^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait `SampleMapTrait` is never used [INFO] [stdout] --> src/sample_map.rs:35:11 [INFO] [stdout] | [INFO] [stdout] 35 | pub trait SampleMapTrait: Iterator { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.48s [INFO] running `Command { std: "docker" "inspect" "bf08924c1c3a484d3cf2a451c5925c37739ced046ed492feef7890501409297a", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "bf08924c1c3a484d3cf2a451c5925c37739ced046ed492feef7890501409297a", kill_on_drop: false }` [INFO] [stdout] bf08924c1c3a484d3cf2a451c5925c37739ced046ed492feef7890501409297a [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" "+caccb4d0368bd918ef6668af8e13834d07040417" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 5bbffbbf03d9fe7b39aa10746e6b15138f0d930b350c4b503f5440bcce9958e9 [INFO] running `Command { std: "docker" "start" "-a" "5bbffbbf03d9fe7b39aa10746e6b15138f0d930b350c4b503f5440bcce9958e9", kill_on_drop: false }` [INFO] [stderr] Compiling rust-hacks v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused imports: `Filter` and `Map` [INFO] [stdout] --> src/sample_map.rs:1:17 [INFO] [stdout] | [INFO] [stdout] 1 | use std::iter::{Filter, Iterator, Map}; [INFO] [stdout] | ^^^^^^ ^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/count_calls.rs:21:18 [INFO] [stdout] | [INFO] [stdout] 21 | fn f(p: &mut FnMut() -> i32) { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see [INFO] [stdout] = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default [INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn` [INFO] [stdout] | [INFO] [stdout] 21 | fn f(p: &mut dyn FnMut() -> i32) { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/sample_map.rs:16:13 [INFO] [stdout] | [INFO] [stdout] 16 | type P = FnMut() -> S; [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see [INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn` [INFO] [stdout] | [INFO] [stdout] 16 | type P = dyn FnMut() -> S; [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `arg` [INFO] [stdout] --> src/move_in_map.rs:6:12 [INFO] [stdout] | [INFO] [stdout] 6 | fn foo(arg: A) -> i32 { [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_arg` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `output` [INFO] [stdout] --> src/move_in_map.rs:13:13 [INFO] [stdout] | [INFO] [stdout] 13 | let output = inputs.into_iter().map(|item| foo(item)); [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_output` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s` [INFO] [stdout] --> src/sample_map.rs:27:13 [INFO] [stdout] | [INFO] [stdout] 27 | let s = self.s.iter().nth(0).unwrap(); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_s` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: type alias `P` is never used [INFO] [stdout] --> src/sample_map.rs:16:6 [INFO] [stdout] | [INFO] [stdout] 16 | type P = FnMut() -> S; [INFO] [stdout] | ^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Map` that must be used [INFO] [stdout] --> src/cross_join.rs:120:9 [INFO] [stdout] | [INFO] [stdout] 120 | input.iter().map(|s| s); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: iterators are lazy and do nothing unless consumed [INFO] [stdout] = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 120 | let _ = input.iter().map(|s| s); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 0.67s [INFO] running `Command { std: "docker" "inspect" "5bbffbbf03d9fe7b39aa10746e6b15138f0d930b350c4b503f5440bcce9958e9", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "5bbffbbf03d9fe7b39aa10746e6b15138f0d930b350c4b503f5440bcce9958e9", kill_on_drop: false }` [INFO] [stdout] 5bbffbbf03d9fe7b39aa10746e6b15138f0d930b350c4b503f5440bcce9958e9 [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" "+caccb4d0368bd918ef6668af8e13834d07040417" "test" "--frozen", kill_on_drop: false }` [INFO] [stdout] cbeba825c1d4df7783a485a89f52ee07c753b2a39c21cb4caf739d174c80ba48 [INFO] running `Command { std: "docker" "start" "-a" "cbeba825c1d4df7783a485a89f52ee07c753b2a39c21cb4caf739d174c80ba48", kill_on_drop: false }` [INFO] [stderr] warning: unused imports: `Filter` and `Map` [INFO] [stdout] [INFO] [stderr] --> src/sample_map.rs:1:17 [INFO] [stdout] running 7 tests [INFO] [stderr] | [INFO] [stdout] test learn_iter::specs_learn::sam_trait ... ok [INFO] [stderr] 1 | use std::iter::{Filter, Iterator, Map}; [INFO] [stdout] test move_in_map::specs::move_in_maps ... ok [INFO] [stderr] | ^^^^^^ ^^^ [INFO] [stdout] test cross_join::specs::cross_iter ... ok [INFO] [stderr] | [INFO] [stdout] test learn_iter::specs_learn::sam_trait_filter ... ok [INFO] [stderr] = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] test sample_map::specs::sample_map_simple ... ok [INFO] [stderr] [INFO] [stdout] test learn_iter::specs_learn::sam_trait_map ... ok [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/count_calls.rs:21:18 [INFO] [stderr] | [INFO] [stderr] 21 | fn f(p: &mut FnMut() -> i32) { [INFO] [stderr] | ^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021! [INFO] [stderr] = note: for more information, see [INFO] [stderr] = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default [INFO] [stderr] help: if this is a dyn-compatible trait, use `dyn` [INFO] [stderr] | [INFO] [stderr] 21 | fn f(p: &mut dyn FnMut() -> i32) { [INFO] [stderr] | +++ [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/sample_map.rs:16:13 [INFO] [stderr] | [INFO] [stderr] 16 | type P = FnMut() -> S; [INFO] [stderr] | ^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021! [INFO] [stderr] = note: for more information, see [INFO] [stderr] help: if this is a dyn-compatible trait, use `dyn` [INFO] [stderr] | [INFO] [stderr] 16 | type P = dyn FnMut() -> S; [INFO] [stderr] | +++ [INFO] [stderr] [INFO] [stderr] warning: unused variable: `arg` [INFO] [stderr] --> src/move_in_map.rs:6:12 [INFO] [stderr] | [INFO] [stderr] 6 | fn foo(arg: A) -> i32 { [INFO] [stderr] | ^^^ help: if this is intentional, prefix it with an underscore: `_arg` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `output` [INFO] [stderr] --> src/move_in_map.rs:13:13 [INFO] [stderr] | [INFO] [stderr] 13 | let output = inputs.into_iter().map(|item| foo(item)); [INFO] [stderr] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_output` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `s` [INFO] [stderr] --> src/sample_map.rs:27:13 [INFO] [stderr] | [INFO] [stderr] 27 | let s = self.s.iter().nth(0).unwrap(); [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_s` [INFO] [stderr] [INFO] [stderr] warning: type alias `P` is never used [INFO] [stderr] --> src/sample_map.rs:16:6 [INFO] [stderr] | [INFO] [stderr] 16 | type P = FnMut() -> S; [INFO] [stderr] | ^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stderr] [INFO] [stderr] warning: unused `Map` that must be used [INFO] [stderr] --> src/cross_join.rs:120:9 [INFO] [stderr] | [INFO] [stderr] 120 | input.iter().map(|s| s); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: iterators are lazy and do nothing unless consumed [INFO] [stderr] = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default [INFO] [stderr] help: use `let _ = ...` to ignore the resulting value [INFO] [stderr] | [INFO] [stderr] 120 | let _ = input.iter().map(|s| s); [INFO] [stderr] | +++++++ [INFO] [stderr] [INFO] [stderr] warning: `rust-hacks` (bin "rust-hacks" test) generated 8 warnings (run `cargo fix --bin "rust-hacks" --tests` to apply 3 suggestions) [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s [INFO] [stderr] Running unittests src/main.rs (/opt/rustwide/target/debug/deps/rust_hacks-49a561208dc81574) [INFO] [stdout] test count_calls::stackoverflow::test ... ok [INFO] [stdout] [INFO] [stdout] test result: ok. 7 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.05s [INFO] [stdout] [INFO] running `Command { std: "docker" "inspect" "cbeba825c1d4df7783a485a89f52ee07c753b2a39c21cb4caf739d174c80ba48", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "cbeba825c1d4df7783a485a89f52ee07c753b2a39c21cb4caf739d174c80ba48", kill_on_drop: false }` [INFO] [stdout] cbeba825c1d4df7783a485a89f52ee07c753b2a39c21cb4caf739d174c80ba48