[INFO] cloning repository https://github.com/sigpher/rust_algorithms [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sigpher/rust_algorithms" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsigpher%2Frust_algorithms", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsigpher%2Frust_algorithms'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 165ce3b204735b00bc3f3a0e5202b0a02199dc2b [INFO] checking sigpher/rust_algorithms against c25253fac451fff60fb5b6c0b2c64d60f628c7cd for pr-160391 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsigpher%2Frust_algorithms" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'... [INFO] [stderr] done. [INFO] started tweaking git repo https://github.com/sigpher/rust_algorithms [INFO] finished tweaking git repo https://github.com/sigpher/rust_algorithms [INFO] tweaked toml for git repo https://github.com/sigpher/rust_algorithms written to /workspace/builds/worker-6-tc1/source/Cargo.toml [INFO] validating manifest of git repo https://github.com/sigpher/rust_algorithms on toolchain c25253fac451fff60fb5b6c0b2c64d60f628c7cd [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c25253fac451fff60fb5b6c0b2c64d60f628c7cd" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate git repo https://github.com/sigpher/rust_algorithms 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" "+c25253fac451fff60fb5b6c0b2c64d60f628c7cd" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"` [INFO] [stderr] | [INFO] [stderr] = note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest [INFO] [stderr] = note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest [INFO] [stderr] = note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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@sha256:8683fc1fc2eb5c9ac98e0d076ab094b2ffac7f99da555d2b6a2e27f346de2ec7" "sleep" "infinity", kill_on_drop: false }` [INFO] [stdout] 93986d1ff9a1d2c693b5e727df24cc5b195b6d70641aad4d5fccd9b58e4a9fa1 [INFO] running `Command { std: "docker" "start" "93986d1ff9a1d2c693b5e727df24cc5b195b6d70641aad4d5fccd9b58e4a9fa1", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "93986d1ff9a1d2c693b5e727df24cc5b195b6d70641aad4d5fccd9b58e4a9fa1", 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" "93986d1ff9a1d2c693b5e727df24cc5b195b6d70641aad4d5fccd9b58e4a9fa1" "/opt/rustwide/cargo-home/bin/cargo" "+c25253fac451fff60fb5b6c0b2c64d60f628c7cd" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "93986d1ff9a1d2c693b5e727df24cc5b195b6d70641aad4d5fccd9b58e4a9fa1", 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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-w" "/opt/rustwide/workdir" "--user" "0:0" "93986d1ff9a1d2c693b5e727df24cc5b195b6d70641aad4d5fccd9b58e4a9fa1" "/opt/rustwide/cargo-home/bin/cargo" "+c25253fac451fff60fb5b6c0b2c64d60f628c7cd" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"` [INFO] [stderr] | [INFO] [stderr] = note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest [INFO] [stderr] = note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest [INFO] [stderr] = note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions [INFO] [stderr] Checking tree v0.1.0 (/opt/rustwide/workdir/tree) [INFO] [stderr] Checking search v0.1.0 (/opt/rustwide/workdir/search) [INFO] [stderr] Checking recursion v0.1.0 (/opt/rustwide/workdir/recursion) [INFO] [stderr] Checking basic_structure v0.1.0 (/opt/rustwide/workdir/basic_structure) [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> basic_structure/src/linkedlist/linkedlist.rs:60:17 [INFO] [stdout] | [INFO] [stdout] 60 | pub fn iter(&self) -> Iter { [INFO] [stdout] | ^^^^^ ^^^^^^^ the same lifetime is hidden here [INFO] [stdout] | | [INFO] [stdout] | the lifetime is elided here [INFO] [stdout] | [INFO] [stdout] = help: the same lifetime is referred to in inconsistent ways, making the signature confusing [INFO] [stdout] = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default [INFO] [stdout] help: use `'_` for type paths [INFO] [stdout] | [INFO] [stdout] 60 | pub fn iter(&self) -> Iter<'_, T> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> basic_structure/src/linkedlist/linkedlist.rs:66:21 [INFO] [stdout] | [INFO] [stdout] 66 | pub fn iter_mut(&mut self) -> IterMut { [INFO] [stdout] | ^^^^^^^^^ ^^^^^^^^^^ the same lifetime is hidden here [INFO] [stdout] | | [INFO] [stdout] | the lifetime is elided here [INFO] [stdout] | [INFO] [stdout] = help: the same lifetime is referred to in inconsistent ways, making the signature confusing [INFO] [stdout] help: use `'_` for type paths [INFO] [stdout] | [INFO] [stdout] 66 | pub fn iter_mut(&mut self) -> IterMut<'_, T> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `Display` [INFO] [stdout] --> tree/src/lib.rs:1:23 [INFO] [stdout] | [INFO] [stdout] 1 | use std::fmt::{Debug, Display}; [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `Display` [INFO] [stdout] --> tree/src/lib.rs:1:23 [INFO] [stdout] | [INFO] [stdout] 1 | use std::fmt::{Debug, Display}; [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> basic_structure/src/linkedlist/linkedlist.rs:60:17 [INFO] [stdout] | [INFO] [stdout] 60 | pub fn iter(&self) -> Iter { [INFO] [stdout] | ^^^^^ ^^^^^^^ the same lifetime is hidden here [INFO] [stdout] | | [INFO] [stdout] | the lifetime is elided here [INFO] [stdout] | [INFO] [stdout] = help: the same lifetime is referred to in inconsistent ways, making the signature confusing [INFO] [stdout] = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default [INFO] [stdout] help: use `'_` for type paths [INFO] [stdout] | [INFO] [stdout] 60 | pub fn iter(&self) -> Iter<'_, T> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> basic_structure/src/linkedlist/linkedlist.rs:66:21 [INFO] [stdout] | [INFO] [stdout] 66 | pub fn iter_mut(&mut self) -> IterMut { [INFO] [stdout] | ^^^^^^^^^ ^^^^^^^^^^ the same lifetime is hidden here [INFO] [stdout] | | [INFO] [stdout] | the lifetime is elided here [INFO] [stdout] | [INFO] [stdout] = help: the same lifetime is referred to in inconsistent ways, making the signature confusing [INFO] [stdout] help: use `'_` for type paths [INFO] [stdout] | [INFO] [stdout] 66 | pub fn iter_mut(&mut self) -> IterMut<'_, T> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `basics` is never used [INFO] [stdout] --> basic_structure/src/main.rs:28:4 [INFO] [stdout] | [INFO] [stdout] 28 | fn basics() { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `into_iter` is never used [INFO] [stdout] --> basic_structure/src/main.rs:43:4 [INFO] [stdout] | [INFO] [stdout] 43 | fn into_iter() { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `iter` is never used [INFO] [stdout] --> basic_structure/src/main.rs:57:4 [INFO] [stdout] | [INFO] [stdout] 57 | fn iter() { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `iter_mut` is never used [INFO] [stdout] --> basic_structure/src/main.rs:71:4 [INFO] [stdout] | [INFO] [stdout] 71 | fn iter_mut() { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `basics` is never used [INFO] [stdout] --> basic_structure/src/main.rs:28:4 [INFO] [stdout] | [INFO] [stdout] 28 | fn basics() { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `into_iter` is never used [INFO] [stdout] --> basic_structure/src/main.rs:43:4 [INFO] [stdout] | [INFO] [stdout] 43 | fn into_iter() { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `iter` is never used [INFO] [stdout] --> basic_structure/src/main.rs:57:4 [INFO] [stdout] | [INFO] [stdout] 57 | fn iter() { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `iter_mut` is never used [INFO] [stdout] --> basic_structure/src/main.rs:71:4 [INFO] [stdout] | [INFO] [stdout] 71 | fn iter_mut() { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.42s [INFO] running `Command { std: "docker" "inspect" "93986d1ff9a1d2c693b5e727df24cc5b195b6d70641aad4d5fccd9b58e4a9fa1", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "93986d1ff9a1d2c693b5e727df24cc5b195b6d70641aad4d5fccd9b58e4a9fa1", kill_on_drop: false }` [INFO] [stdout] 93986d1ff9a1d2c693b5e727df24cc5b195b6d70641aad4d5fccd9b58e4a9fa1