[INFO] cloning repository https://github.com/cmhteixeira/little-book-of-semaphores-rust [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/cmhteixeira/little-book-of-semaphores-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcmhteixeira%2Flittle-book-of-semaphores-rust", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcmhteixeira%2Flittle-book-of-semaphores-rust'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 9e24f7dadf8035cef4a84fd75ae749ff7313b578 [INFO] checking cmhteixeira/little-book-of-semaphores-rust against master#a874956d940ecb3ed524b6176a171219ac4787ea for pr-76104 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcmhteixeira%2Flittle-book-of-semaphores-rust" "/workspace/builds/worker-5/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/cmhteixeira/little-book-of-semaphores-rust on toolchain a874956d940ecb3ed524b6176a171219ac4787ea [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a874956d940ecb3ed524b6176a171219ac4787ea" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/cmhteixeira/little-book-of-semaphores-rust [INFO] finished tweaking git repo https://github.com/cmhteixeira/little-book-of-semaphores-rust [INFO] tweaked toml for git repo https://github.com/cmhteixeira/little-book-of-semaphores-rust written to /workspace/builds/worker-5/source/Cargo.toml [INFO] crate git repo https://github.com/cmhteixeira/little-book-of-semaphores-rust already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a874956d940ecb3ed524b6176a171219ac4787ea" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+a874956d940ecb3ed524b6176a171219ac4787ea" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 2b54ed1ba7b04a945fa2b12d1d0dfadeeefb6787e2ddeb978842c15e0f2e4796 [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "2b54ed1ba7b04a945fa2b12d1d0dfadeeefb6787e2ddeb978842c15e0f2e4796", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "2b54ed1ba7b04a945fa2b12d1d0dfadeeefb6787e2ddeb978842c15e0f2e4796", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "2b54ed1ba7b04a945fa2b12d1d0dfadeeefb6787e2ddeb978842c15e0f2e4796", kill_on_drop: false }` [INFO] [stdout] 2b54ed1ba7b04a945fa2b12d1d0dfadeeefb6787e2ddeb978842c15e0f2e4796 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+a874956d940ecb3ed524b6176a171219ac4787ea" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 00e2ee836e5e53d062670dd26537badfb8760e9ae617d90a92c9478d3c7cf7a1 [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "00e2ee836e5e53d062670dd26537badfb8760e9ae617d90a92c9478d3c7cf7a1", kill_on_drop: false }` [INFO] [stderr] Checking little-book-semaphores-rust v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused import: `std::time::Duration` [INFO] [stdout] --> src/rendezvous.rs:5:5 [INFO] [stdout] | [INFO] [stdout] 5 | use std::time::Duration; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `Mutex` [INFO] [stdout] --> src/mutex.rs:2:22 [INFO] [stdout] | [INFO] [stdout] 2 | use std::sync::{Arc, Mutex}; [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `DerefMut`, `Deref` [INFO] [stdout] --> src/mutex.rs:5:16 [INFO] [stdout] | [INFO] [stdout] 5 | use std::ops::{DerefMut, Deref}; [INFO] [stdout] | ^^^^^^^^ ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `RefCell` [INFO] [stdout] --> src/mutex.rs:6:17 [INFO] [stdout] | [INFO] [stdout] 6 | use std::cell::{RefCell, UnsafeCell}; [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::time::Duration` [INFO] [stdout] --> src/barrier.rs:2:5 [INFO] [stdout] | [INFO] [stdout] 2 | use std::time::Duration; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `AtomicBool` [INFO] [stdout] --> src/barrier.rs:4:25 [INFO] [stdout] | [INFO] [stdout] 4 | use std::sync::atomic::{AtomicBool, Ordering}; [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::alloc::System` [INFO] [stdout] --> src/barrier.rs:7:5 [INFO] [stdout] | [INFO] [stdout] 7 | use std::alloc::System; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::time::Duration` [INFO] [stdout] --> src/rendezvous.rs:5:5 [INFO] [stdout] | [INFO] [stdout] 5 | use std::time::Duration; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `Mutex` [INFO] [stdout] --> src/mutex.rs:2:22 [INFO] [stdout] | [INFO] [stdout] 2 | use std::sync::{Arc, Mutex}; [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `DerefMut`, `Deref` [INFO] [stdout] --> src/mutex.rs:5:16 [INFO] [stdout] | [INFO] [stdout] 5 | use std::ops::{DerefMut, Deref}; [INFO] [stdout] | ^^^^^^^^ ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `RefCell` [INFO] [stdout] --> src/mutex.rs:6:17 [INFO] [stdout] | [INFO] [stdout] 6 | use std::cell::{RefCell, UnsafeCell}; [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::time::Duration` [INFO] [stdout] --> src/barrier.rs:2:5 [INFO] [stdout] | [INFO] [stdout] 2 | use std::time::Duration; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `AtomicBool` [INFO] [stdout] --> src/barrier.rs:4:25 [INFO] [stdout] | [INFO] [stdout] 4 | use std::sync::atomic::{AtomicBool, Ordering}; [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::alloc::System` [INFO] [stdout] --> src/barrier.rs:7:5 [INFO] [stdout] | [INFO] [stdout] 7 | use std::alloc::System; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/mutex.rs:44:25 [INFO] [stdout] | [INFO] [stdout] 44 | let mut lock_obtained = arc.lock(); [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: cannot borrow `*lock_obtained` as mutable because it is also borrowed as immutable [INFO] [stdout] --> src/mutex.rs:50:21 [INFO] [stdout] | [INFO] [stdout] 49 | let last = lock_obtained.last().unwrap_or(&0); [INFO] [stdout] | ------------- immutable borrow occurs here [INFO] [stdout] 50 | lock_obtained.push(last.clone() + 1); [INFO] [stdout] | ^^^^^^^^^^^^^ ---- immutable borrow later used here [INFO] [stdout] | | [INFO] [stdout] | mutable borrow occurs here [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default [INFO] [stdout] = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future [INFO] [stdout] = note: for more information, see issue #59159 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/mutex.rs:44:25 [INFO] [stdout] | [INFO] [stdout] 44 | let mut lock_obtained = arc.lock(); [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: cannot borrow `*lock_obtained` as mutable because it is also borrowed as immutable [INFO] [stdout] --> src/mutex.rs:50:21 [INFO] [stdout] | [INFO] [stdout] 49 | let last = lock_obtained.last().unwrap_or(&0); [INFO] [stdout] | ------------- immutable borrow occurs here [INFO] [stdout] 50 | lock_obtained.push(last.clone() + 1); [INFO] [stdout] | ^^^^^^^^^^^^^ ---- immutable borrow later used here [INFO] [stdout] | | [INFO] [stdout] | mutable borrow occurs here [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default [INFO] [stdout] = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future [INFO] [stdout] = note: for more information, see issue #59159 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `das_multiplex` [INFO] [stdout] --> src/multiplex.rs:7:4 [INFO] [stdout] | [INFO] [stdout] 7 | fn das_multiplex(n: u8, num_threads: u8) -> Vec>{ [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `das_multiplex` [INFO] [stdout] --> src/multiplex.rs:7:4 [INFO] [stdout] | [INFO] [stdout] 7 | fn das_multiplex(n: u8, num_threads: u8) -> Vec>{ [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 10 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 10 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `little_book_semaphores_rust::Semaphore` [INFO] [stdout] --> src/main.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use little_book_semaphores_rust::Semaphore; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::thread` [INFO] [stdout] --> src/main.rs:2:5 [INFO] [stdout] | [INFO] [stdout] 2 | use std::thread; [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::sync::Arc` [INFO] [stdout] --> src/main.rs:3:5 [INFO] [stdout] | [INFO] [stdout] 3 | use std::sync::Arc; [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::time::Duration` [INFO] [stdout] --> src/main.rs:4:5 [INFO] [stdout] | [INFO] [stdout] 4 | use std::time::Duration; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `little_book_semaphores_rust::rendezvous::*` [INFO] [stdout] --> src/main.rs:5:5 [INFO] [stdout] | [INFO] [stdout] 5 | use little_book_semaphores_rust::rendezvous::*; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `MyCustomMutex`, `monkey` [INFO] [stdout] --> src/main.rs:6:42 [INFO] [stdout] | [INFO] [stdout] 6 | use little_book_semaphores_rust::mutex::{monkey, MyCustomMutex}; [INFO] [stdout] | ^^^^^^ ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::ops::Deref` [INFO] [stdout] --> src/main.rs:7:5 [INFO] [stdout] | [INFO] [stdout] 7 | use std::ops::Deref; [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `little_book_semaphores_rust::Semaphore` [INFO] [stdout] --> src/main.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use little_book_semaphores_rust::Semaphore; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::thread` [INFO] [stdout] --> src/main.rs:2:5 [INFO] [stdout] | [INFO] [stdout] 2 | use std::thread; [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::sync::Arc` [INFO] [stdout] --> src/main.rs:3:5 [INFO] [stdout] | [INFO] [stdout] 3 | use std::sync::Arc; [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::time::Duration` [INFO] [stdout] --> src/main.rs:4:5 [INFO] [stdout] | [INFO] [stdout] 4 | use std::time::Duration; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `little_book_semaphores_rust::rendezvous::*` [INFO] [stdout] --> src/main.rs:5:5 [INFO] [stdout] | [INFO] [stdout] 5 | use little_book_semaphores_rust::rendezvous::*; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `MyCustomMutex`, `monkey` [INFO] [stdout] --> src/main.rs:6:42 [INFO] [stdout] | [INFO] [stdout] 6 | use little_book_semaphores_rust::mutex::{monkey, MyCustomMutex}; [INFO] [stdout] | ^^^^^^ ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::ops::Deref` [INFO] [stdout] --> src/main.rs:7:5 [INFO] [stdout] | [INFO] [stdout] 7 | use std::ops::Deref; [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `std::result::Result` that must be used [INFO] [stdout] --> src/main.rs:14:7 [INFO] [stdout] | [INFO] [stdout] 14 | a.join(); [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `std::result::Result` that must be used [INFO] [stdout] --> src/main.rs:14:7 [INFO] [stdout] | [INFO] [stdout] 14 | a.join(); [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 8 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 8 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 0.78s [INFO] running `Command { std: "docker" "inspect" "00e2ee836e5e53d062670dd26537badfb8760e9ae617d90a92c9478d3c7cf7a1", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "00e2ee836e5e53d062670dd26537badfb8760e9ae617d90a92c9478d3c7cf7a1", kill_on_drop: false }` [INFO] [stdout] 00e2ee836e5e53d062670dd26537badfb8760e9ae617d90a92c9478d3c7cf7a1