[INFO] cloning repository https://github.com/Jashwanth-k/rust-learn [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Jashwanth-k/rust-learn" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJashwanth-k%2Frust-learn", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJashwanth-k%2Frust-learn'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] a4f90ea0f9cf8857acd1db91253b476c130e95a0 [INFO] checking Jashwanth-k/rust-learn/a4f90ea0f9cf8857acd1db91253b476c130e95a0 against master#ba412a6e70ac84641be7764d088acabd0eb3fa39 for pr-145457 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJashwanth-k%2Frust-learn" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'... [INFO] [stderr] done. [INFO] started tweaking git repo https://github.com/Jashwanth-k/rust-learn [INFO] finished tweaking git repo https://github.com/Jashwanth-k/rust-learn [INFO] tweaked toml for git repo https://github.com/Jashwanth-k/rust-learn written to /workspace/builds/worker-0-tc1/source/Cargo.toml [INFO] validating manifest of git repo https://github.com/Jashwanth-k/rust-learn on toolchain ba412a6e70ac84641be7764d088acabd0eb3fa39 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ba412a6e70ac84641be7764d088acabd0eb3fa39" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate git repo https://github.com/Jashwanth-k/rust-learn 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" "+ba412a6e70ac84641be7764d088acabd0eb3fa39" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Updating crates.io index [INFO] [stderr] Downloading crates ... 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"--format-version=1", kill_on_drop: false }` [INFO] [stdout] 1f92a2f77006bd292e42a7c022e05d7a36b47c7a80ce571471497940df94c1fc [INFO] running `Command { std: "docker" "start" "-a" "1f92a2f77006bd292e42a7c022e05d7a36b47c7a80ce571471497940df94c1fc", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "1f92a2f77006bd292e42a7c022e05d7a36b47c7a80ce571471497940df94c1fc", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "1f92a2f77006bd292e42a7c022e05d7a36b47c7a80ce571471497940df94c1fc", kill_on_drop: false }` [INFO] [stdout] 1f92a2f77006bd292e42a7c022e05d7a36b47c7a80ce571471497940df94c1fc [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+ba412a6e70ac84641be7764d088acabd0eb3fa39" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 24e183067b2ce6daa84d75421ba0ef539fd7cd1d97575c3078b2328312a069b7 [INFO] running `Command { std: "docker" "start" "-a" "24e183067b2ce6daa84d75421ba0ef539fd7cd1d97575c3078b2328312a069b7", kill_on_drop: false }` [INFO] [stderr] Compiling 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[stderr] Checking futures-executor v0.3.31 [INFO] [stderr] Checking futures v0.3.31 [INFO] [stderr] Checking hyper v1.6.0 [INFO] [stderr] Checking idna_adapter v1.2.1 [INFO] [stderr] Checking hyper-util v0.1.11 [INFO] [stderr] Checking idna v1.0.3 [INFO] [stderr] Checking url v2.5.4 [INFO] [stderr] Checking hyper-tls v0.6.0 [INFO] [stderr] Checking reqwest v0.12.15 [INFO] [stderr] Checking trpl v0.2.0 [INFO] [stderr] Checking hello-cargo v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused import: `std::fmt::format` [INFO] [stdout] --> src/main.rs:774:5 [INFO] [stdout] | [INFO] [stdout] 774 | use std::fmt::format; [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::fmt::format` [INFO] [stdout] --> src/main.rs:774:5 [INFO] [stdout] | [INFO] [stdout] 774 | use std::fmt::format; [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::rc::Rc` [INFO] [stdout] --> src/main.rs:776:5 [INFO] [stdout] | [INFO] [stdout] 776 | use std::rc::Rc; [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::sync::Arc` [INFO] [stdout] --> src/main.rs:777:5 [INFO] [stdout] | [INFO] [stdout] 777 | use std::sync::Arc; [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::sync::mpsc` [INFO] [stdout] --> src/main.rs:779:5 [INFO] [stdout] | [INFO] [stdout] 779 | use std::sync::mpsc; [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::sync::Mutex` [INFO] [stdout] --> src/main.rs:780:5 [INFO] [stdout] | [INFO] [stdout] 780 | use std::sync::Mutex; [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::thread::JoinHandle` [INFO] [stdout] --> src/main.rs:781:5 [INFO] [stdout] | [INFO] [stdout] 781 | use std::thread::JoinHandle; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::vec` [INFO] [stdout] --> src/main.rs:783:5 [INFO] [stdout] | [INFO] [stdout] 783 | use std::vec; [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `Context` and `Poll` [INFO] [stdout] --> src/main.rs:903:17 [INFO] [stdout] | [INFO] [stdout] 903 | use std::task::{Context, Poll}; [INFO] [stdout] | ^^^^^^^ ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `executor::*` [INFO] [stdout] --> src/main.rs:917:5 [INFO] [stdout] | [INFO] [stdout] 917 | use executor::*; [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::rc::Rc` [INFO] [stdout] --> src/main.rs:776:5 [INFO] [stdout] | [INFO] [stdout] 776 | use std::rc::Rc; [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::sync::Arc` [INFO] [stdout] --> src/main.rs:777:5 [INFO] [stdout] | [INFO] [stdout] 777 | use std::sync::Arc; [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::sync::mpsc` [INFO] [stdout] --> src/main.rs:779:5 [INFO] [stdout] | [INFO] [stdout] 779 | use std::sync::mpsc; [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::sync::Mutex` [INFO] [stdout] --> src/main.rs:780:5 [INFO] [stdout] | [INFO] [stdout] 780 | use std::sync::Mutex; [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::thread::JoinHandle` [INFO] [stdout] --> src/main.rs:781:5 [INFO] [stdout] | [INFO] [stdout] 781 | use std::thread::JoinHandle; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::vec` [INFO] [stdout] --> src/main.rs:783:5 [INFO] [stdout] | [INFO] [stdout] 783 | use std::vec; [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `Context` and `Poll` [INFO] [stdout] --> src/main.rs:903:17 [INFO] [stdout] | [INFO] [stdout] 903 | use std::task::{Context, Poll}; [INFO] [stdout] | ^^^^^^^ ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `executor::*` [INFO] [stdout] --> src/main.rs:917:5 [INFO] [stdout] | [INFO] [stdout] 917 | use executor::*; [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `future` [INFO] [stdout] --> src/main.rs:926:13 [INFO] [stdout] | [INFO] [stdout] 926 | let mut future = Box::pin(get_data("https://example.com")); [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_future` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `result` [INFO] [stdout] --> src/main.rs:972:9 [INFO] [stdout] | [INFO] [stdout] 972 | let result = trpl::join(async1, async2); [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_result` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `all_futures` [INFO] [stdout] --> src/main.rs:1014:9 [INFO] [stdout] | [INFO] [stdout] 1014 | let all_futures: [Pin<&mut dyn Future>; 3]= [tx_fut, rx_fut, tx2_fut]; [INFO] [stdout] | ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_all_futures` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `slow` [INFO] [stdout] --> src/main.rs:1018:9 [INFO] [stdout] | [INFO] [stdout] 1018 | let slow = async { [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_slow` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `fast` [INFO] [stdout] --> src/main.rs:1023:9 [INFO] [stdout] | [INFO] [stdout] 1023 | let fast = async { [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_fast` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: irrefutable `while let` pattern [INFO] [stdout] --> src/main.rs:992:15 [INFO] [stdout] | [INFO] [stdout] 992 | while let data = rx.recv().await { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this pattern will always match, so the loop will never exit [INFO] [stdout] = help: consider instead using a `loop { ... }` with a `let` inside it [INFO] [stdout] = note: `#[warn(irrefutable_let_patterns)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:926:9 [INFO] [stdout] | [INFO] [stdout] 926 | let mut future = Box::pin(get_data("https://example.com")); [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: unused variable: `future` [INFO] [stdout] --> src/main.rs:926:13 [INFO] [stdout] | [INFO] [stdout] 926 | let mut future = Box::pin(get_data("https://example.com")); [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_future` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `result` [INFO] [stdout] --> src/main.rs:972:9 [INFO] [stdout] | [INFO] [stdout] 972 | let result = trpl::join(async1, async2); [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_result` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `all_futures` [INFO] [stdout] --> src/main.rs:1014:9 [INFO] [stdout] | [INFO] [stdout] 1014 | let all_futures: [Pin<&mut dyn Future>; 3]= [tx_fut, rx_fut, tx2_fut]; [INFO] [stdout] | ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_all_futures` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `slow` [INFO] [stdout] --> src/main.rs:1018:9 [INFO] [stdout] | [INFO] [stdout] 1018 | let slow = async { [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_slow` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `fast` [INFO] [stdout] --> src/main.rs:1023:9 [INFO] [stdout] | [INFO] [stdout] 1023 | let fast = async { [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_fast` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: irrefutable `while let` pattern [INFO] [stdout] --> src/main.rs:992:15 [INFO] [stdout] | [INFO] [stdout] 992 | while let data = rx.recv().await { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this pattern will always match, so the loop will never exit [INFO] [stdout] = help: consider instead using a `loop { ... }` with a `let` inside it [INFO] [stdout] = note: `#[warn(irrefutable_let_patterns)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `slowBlocking` should have a snake case name [INFO] [stdout] --> src/main.rs:920:4 [INFO] [stdout] | [INFO] [stdout] 920 | fn slowBlocking(operType : &str, ms : u32) { [INFO] [stdout] | ^^^^^^^^^^^^ help: convert the identifier to snake case: `slow_blocking` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(non_snake_case)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable `operType` should have a snake case name [INFO] [stdout] --> src/main.rs:920:17 [INFO] [stdout] | [INFO] [stdout] 920 | fn slowBlocking(operType : &str, ms : u32) { [INFO] [stdout] | ^^^^^^^^ help: convert the identifier to snake case: `oper_type` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:926:9 [INFO] [stdout] | [INFO] [stdout] 926 | let mut future = Box::pin(get_data("https://example.com")); [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: unused `Result` that must be used [INFO] [stdout] --> src/main.rs:986:13 [INFO] [stdout] | [INFO] [stdout] 986 | tx.send(i); [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] 986 | let _ = tx.send(i); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `slowBlocking` should have a snake case name [INFO] [stdout] --> src/main.rs:920:4 [INFO] [stdout] | [INFO] [stdout] 920 | fn slowBlocking(operType : &str, ms : u32) { [INFO] [stdout] | ^^^^^^^^^^^^ help: convert the identifier to snake case: `slow_blocking` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(non_snake_case)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/main.rs:1009:13 [INFO] [stdout] | [INFO] [stdout] 1009 | tx_clone.send(i); [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] 1009 | let _ = tx_clone.send(i); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable `operType` should have a snake case name [INFO] [stdout] --> src/main.rs:920:17 [INFO] [stdout] | [INFO] [stdout] 920 | fn slowBlocking(operType : &str, ms : u32) { [INFO] [stdout] | ^^^^^^^^ help: convert the identifier to snake case: `oper_type` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/main.rs:986:13 [INFO] [stdout] | [INFO] [stdout] 986 | tx.send(i); [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] 986 | let _ = tx.send(i); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/main.rs:1009:13 [INFO] [stdout] | [INFO] [stdout] 1009 | tx_clone.send(i); [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] 1009 | let _ = tx_clone.send(i); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 22.61s [INFO] running `Command { std: "docker" "inspect" "24e183067b2ce6daa84d75421ba0ef539fd7cd1d97575c3078b2328312a069b7", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "24e183067b2ce6daa84d75421ba0ef539fd7cd1d97575c3078b2328312a069b7", kill_on_drop: false }` [INFO] [stdout] 24e183067b2ce6daa84d75421ba0ef539fd7cd1d97575c3078b2328312a069b7