[INFO] cloning repository https://github.com/matthewashton-k/Lesson-5 [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/matthewashton-k/Lesson-5" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmatthewashton-k%2FLesson-5", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmatthewashton-k%2FLesson-5'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] d2c99fcf3f51990b9cb57526b2aa02a9afcd0fad [INFO] checking matthewashton-k/Lesson-5 against try#a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d for pr-145342-1 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmatthewashton-k%2FLesson-5" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'... [INFO] [stderr] done. [INFO] started tweaking git repo https://github.com/matthewashton-k/Lesson-5 [INFO] finished tweaking git repo https://github.com/matthewashton-k/Lesson-5 [INFO] tweaked toml for git repo https://github.com/matthewashton-k/Lesson-5 written to /workspace/builds/worker-4-tc2/source/Cargo.toml [INFO] validating manifest of git repo https://github.com/matthewashton-k/Lesson-5 on toolchain a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate git repo https://github.com/matthewashton-k/Lesson-5 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" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] b1989e36522db7f2c0a47bb721f6059f58d61e165e774bd1e93350635f10a565 [INFO] running `Command { std: "docker" "start" "-a" "b1989e36522db7f2c0a47bb721f6059f58d61e165e774bd1e93350635f10a565", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "b1989e36522db7f2c0a47bb721f6059f58d61e165e774bd1e93350635f10a565", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "b1989e36522db7f2c0a47bb721f6059f58d61e165e774bd1e93350635f10a565", kill_on_drop: false }` [INFO] [stdout] b1989e36522db7f2c0a47bb721f6059f58d61e165e774bd1e93350635f10a565 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 55efe54fcb263710b46f3fcaea031e107f95465f08cc40ad873dbb78ee227e1c [INFO] running `Command { std: "docker" "start" "-a" "55efe54fcb263710b46f3fcaea031e107f95465f08cc40ad873dbb78ee227e1c", kill_on_drop: false }` [INFO] [stderr] Compiling proc-macro2 v1.0.93 [INFO] [stderr] Compiling unicode-ident v1.0.17 [INFO] [stderr] Compiling libc v0.2.170 [INFO] [stderr] Compiling getrandom v0.3.1 [INFO] [stderr] Compiling zerocopy v0.8.21 [INFO] [stderr] Checking byteorder v1.5.0 [INFO] [stderr] Checking cfg-if v1.0.0 [INFO] [stderr] Compiling quote v1.0.38 [INFO] [stderr] Compiling syn v2.0.98 [INFO] [stderr] Checking rand_core v0.9.2 [INFO] [stderr] Compiling zerocopy-derive v0.7.35 [INFO] [stderr] Checking zerocopy v0.7.35 [INFO] [stderr] Checking ppv-lite86 v0.2.20 [INFO] [stderr] Checking rand_chacha v0.9.0 [INFO] [stderr] Checking rand v0.9.0 [INFO] [stderr] Checking send_sync v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused imports: `MutexGuard` and `fmt::Display` [INFO] [stdout] --> src/main.rs:1:18 [INFO] [stdout] | [INFO] [stdout] 1 | use std::{sync::{MutexGuard, Mutex, mpsc, Arc, atomic::{AtomicBool, Ordering}}, thread, fmt::Display, time::Duration}; [INFO] [stdout] | ^^^^^^^^^^ ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `prelude::IndexedRandom` [INFO] [stdout] --> src/main.rs:3:26 [INFO] [stdout] | [INFO] [stdout] 3 | use rand::{random_range, prelude::IndexedRandom}; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `val` [INFO] [stdout] --> src/main.rs:25:9 [INFO] [stdout] | [INFO] [stdout] 25 | let val: String = thread.join().unwrap(); [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_val` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `val2` [INFO] [stdout] --> src/main.rs:26:9 [INFO] [stdout] | [INFO] [stdout] 26 | let val2: String = thread2.join().unwrap(); [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_val2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `altered` [INFO] [stdout] --> src/main.rs:15:13 [INFO] [stdout] | [INFO] [stdout] 15 | let altered = cloned.push_str("pushed from thread"); [INFO] [stdout] | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_altered` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `altered` [INFO] [stdout] --> src/main.rs:22:13 [INFO] [stdout] | [INFO] [stdout] 22 | let altered = cloned.push_str("pushed from thread2"); [INFO] [stdout] | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_altered` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `message` [INFO] [stdout] --> src/main.rs:46:9 [INFO] [stdout] | [INFO] [stdout] 46 | let message = rx.recv().unwrap(); [INFO] [stdout] | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_message` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `MutexGuard` and `fmt::Display` [INFO] [stdout] --> src/main.rs:1:18 [INFO] [stdout] | [INFO] [stdout] 1 | use std::{sync::{MutexGuard, Mutex, mpsc, Arc, atomic::{AtomicBool, Ordering}}, thread, fmt::Display, time::Duration}; [INFO] [stdout] | ^^^^^^^^^^ ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `i` [INFO] [stdout] --> src/main.rs:105:9 [INFO] [stdout] | [INFO] [stdout] 105 | for i in 0..5000 { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_i` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `i` [INFO] [stdout] --> src/main.rs:140:9 [INFO] [stdout] | [INFO] [stdout] 140 | for i in 0..5000 { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_i` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `cloning` is never used [INFO] [stdout] --> src/main.rs:10:4 [INFO] [stdout] | [INFO] [stdout] 10 | fn cloning() { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `thread_channel` is never used [INFO] [stdout] --> src/main.rs:29:4 [INFO] [stdout] | [INFO] [stdout] 29 | fn thread_channel() { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `reference_counting` is never used [INFO] [stdout] --> src/main.rs:51:4 [INFO] [stdout] | [INFO] [stdout] 51 | fn reference_counting() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `mutex_compile1` is never used [INFO] [stdout] --> src/main.rs:71:4 [INFO] [stdout] | [INFO] [stdout] 71 | fn mutex_compile1() { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `custom_lock` is never used [INFO] [stdout] --> src/main.rs:97:4 [INFO] [stdout] | [INFO] [stdout] 97 | fn custom_lock() { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `prelude::IndexedRandom` [INFO] [stdout] --> src/main.rs:3:26 [INFO] [stdout] | [INFO] [stdout] 3 | use rand::{random_range, prelude::IndexedRandom}; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `val` [INFO] [stdout] --> src/main.rs:25:9 [INFO] [stdout] | [INFO] [stdout] 25 | let val: String = thread.join().unwrap(); [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_val` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `val2` [INFO] [stdout] --> src/main.rs:26:9 [INFO] [stdout] | [INFO] [stdout] 26 | let val2: String = thread2.join().unwrap(); [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_val2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `altered` [INFO] [stdout] --> src/main.rs:15:13 [INFO] [stdout] | [INFO] [stdout] 15 | let altered = cloned.push_str("pushed from thread"); [INFO] [stdout] | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_altered` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `altered` [INFO] [stdout] --> src/main.rs:22:13 [INFO] [stdout] | [INFO] [stdout] 22 | let altered = cloned.push_str("pushed from thread2"); [INFO] [stdout] | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_altered` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `message` [INFO] [stdout] --> src/main.rs:46:9 [INFO] [stdout] | [INFO] [stdout] 46 | let message = rx.recv().unwrap(); [INFO] [stdout] | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_message` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/main.rs:126:9 [INFO] [stdout] | [INFO] [stdout] 126 | h.join(); [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 126 | let _ = h.join(); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/main.rs:164:9 [INFO] [stdout] | [INFO] [stdout] 164 | h.join(); [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 164 | let _ = h.join(); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `i` [INFO] [stdout] --> src/main.rs:105:9 [INFO] [stdout] | [INFO] [stdout] 105 | for i in 0..5000 { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_i` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `i` [INFO] [stdout] --> src/main.rs:140:9 [INFO] [stdout] | [INFO] [stdout] 140 | for i in 0..5000 { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_i` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `cloning` is never used [INFO] [stdout] --> src/main.rs:10:4 [INFO] [stdout] | [INFO] [stdout] 10 | fn cloning() { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `thread_channel` is never used [INFO] [stdout] --> src/main.rs:29:4 [INFO] [stdout] | [INFO] [stdout] 29 | fn thread_channel() { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `reference_counting` is never used [INFO] [stdout] --> src/main.rs:51:4 [INFO] [stdout] | [INFO] [stdout] 51 | fn reference_counting() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `mutex_compile1` is never used [INFO] [stdout] --> src/main.rs:71:4 [INFO] [stdout] | [INFO] [stdout] 71 | fn mutex_compile1() { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `custom_lock` is never used [INFO] [stdout] --> src/main.rs:97:4 [INFO] [stdout] | [INFO] [stdout] 97 | fn custom_lock() { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/main.rs:126:9 [INFO] [stdout] | [INFO] [stdout] 126 | h.join(); [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 126 | let _ = h.join(); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/main.rs:164:9 [INFO] [stdout] | [INFO] [stdout] 164 | h.join(); [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 164 | let _ = h.join(); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.56s [INFO] running `Command { std: "docker" "inspect" "55efe54fcb263710b46f3fcaea031e107f95465f08cc40ad873dbb78ee227e1c", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "55efe54fcb263710b46f3fcaea031e107f95465f08cc40ad873dbb78ee227e1c", kill_on_drop: false }` [INFO] [stdout] 55efe54fcb263710b46f3fcaea031e107f95465f08cc40ad873dbb78ee227e1c