[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 try#b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f 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-6/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/cmhteixeira/little-book-of-semaphores-rust on toolchain b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f" "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-6/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" "+b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 7caa0963a37207aa6c12eaaa224d8cd44ababa21bd7857b6ff6252ff6daa73d8 [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" "7caa0963a37207aa6c12eaaa224d8cd44ababa21bd7857b6ff6252ff6daa73d8", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "7caa0963a37207aa6c12eaaa224d8cd44ababa21bd7857b6ff6252ff6daa73d8", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "7caa0963a37207aa6c12eaaa224d8cd44ababa21bd7857b6ff6252ff6daa73d8", kill_on_drop: false }` [INFO] [stdout] 7caa0963a37207aa6c12eaaa224d8cd44ababa21bd7857b6ff6252ff6daa73d8 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] [stdout] 1f63638282c81a6d15d9e90758b8dfef2fa8e1c49d7f9bb4f726ff472638a5da [INFO] running `Command { std: "docker" "start" "-a" "1f63638282c81a6d15d9e90758b8dfef2fa8e1c49d7f9bb4f726ff472638a5da", 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] error: 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: `#[deny(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] error: aborting due to previous error; 8 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `little-book-semaphores-rust` [INFO] [stderr] [INFO] [stderr] To learn more, run the command again with --verbose. [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [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] error: 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: `#[deny(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] error: aborting due to previous error; 8 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: build failed [INFO] running `Command { std: "docker" "inspect" "1f63638282c81a6d15d9e90758b8dfef2fa8e1c49d7f9bb4f726ff472638a5da", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "1f63638282c81a6d15d9e90758b8dfef2fa8e1c49d7f9bb4f726ff472638a5da", kill_on_drop: false }` [INFO] [stdout] 1f63638282c81a6d15d9e90758b8dfef2fa8e1c49d7f9bb4f726ff472638a5da