[INFO] cloning repository https://github.com/ac999/round_robin_loadbalancer [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ac999/round_robin_loadbalancer" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fac999%2Fround_robin_loadbalancer", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fac999%2Fround_robin_loadbalancer'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 1d8f5e98321031b090052f0597fda4a8a641fafb [INFO] checking ac999/round_robin_loadbalancer/1d8f5e98321031b090052f0597fda4a8a641fafb against master#ab869e094a907cc5d19b4080f22eccaf347f1f95 for pr-129604 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fac999%2Fround_robin_loadbalancer" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/ac999/round_robin_loadbalancer on toolchain ab869e094a907cc5d19b4080f22eccaf347f1f95 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/ac999/round_robin_loadbalancer [INFO] finished tweaking git repo https://github.com/ac999/round_robin_loadbalancer [INFO] tweaked toml for git repo https://github.com/ac999/round_robin_loadbalancer written to /workspace/builds/worker-5-tc1/source/Cargo.toml [INFO] crate git repo https://github.com/ac999/round_robin_loadbalancer 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" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded futures-executor v0.3.16 [INFO] [stderr] Downloaded bitflags v1.3.1 [INFO] [stderr] Downloaded rlua v0.17.0 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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_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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 301f06be5d359429c0efa1b290604abfebfc1e61ee4ffcfedb5c4994d55b78ca [INFO] running `Command { std: "docker" "start" "-a" "301f06be5d359429c0efa1b290604abfebfc1e61ee4ffcfedb5c4994d55b78ca", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "301f06be5d359429c0efa1b290604abfebfc1e61ee4ffcfedb5c4994d55b78ca", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "301f06be5d359429c0efa1b290604abfebfc1e61ee4ffcfedb5c4994d55b78ca", kill_on_drop: false }` [INFO] [stdout] 301f06be5d359429c0efa1b290604abfebfc1e61ee4ffcfedb5c4994d55b78ca [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 20c5c01bf8b63f97995870c302e41931792fe9c34399385353d5e10560a3f06c [INFO] running `Command { std: "docker" "start" "-a" "20c5c01bf8b63f97995870c302e41931792fe9c34399385353d5e10560a3f06c", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.99 [INFO] [stderr] Compiling syn v1.0.74 [INFO] [stderr] Compiling memchr v2.4.0 [INFO] [stderr] Compiling proc-macro-hack v0.5.19 [INFO] [stderr] Compiling futures-core v0.3.16 [INFO] [stderr] Compiling futures-macro v0.3.16 [INFO] [stderr] Compiling futures-task v0.3.16 [INFO] [stderr] Compiling proc-macro-nested v0.1.7 [INFO] [stderr] Compiling futures-channel v0.3.16 [INFO] [stderr] Compiling futures-util v0.3.16 [INFO] [stderr] Compiling serde_derive v1.0.127 [INFO] [stderr] Checking pin-project-lite v0.2.7 [INFO] [stderr] Checking futures-sink v0.3.16 [INFO] [stderr] Checking pin-utils v0.1.0 [INFO] [stderr] Compiling serde v1.0.127 [INFO] [stderr] Checking futures-io v0.3.16 [INFO] [stderr] Compiling cc v1.0.69 [INFO] [stderr] Compiling tokio v1.10.0 [INFO] [stderr] Checking ppv-lite86 v0.2.10 [INFO] [stderr] Checking itoa v0.4.7 [INFO] [stderr] Checking bitflags v1.3.1 [INFO] [stderr] Checking bytes v1.0.1 [INFO] [stderr] Checking once_cell v1.8.0 [INFO] [stderr] Checking bstr v0.2.16 [INFO] [stderr] Checking getrandom v0.2.3 [INFO] [stderr] Checking parking_lot_core v0.8.3 [INFO] [stderr] Checking mio v0.7.13 [INFO] [stderr] Checking signal-hook-registry v1.4.0 [INFO] [stderr] Checking num_cpus v1.13.0 [INFO] [stderr] Checking rand_core v0.6.3 [INFO] [stderr] Checking rand_chacha v0.3.1 [INFO] [stderr] Checking parking_lot v0.11.1 [INFO] [stderr] Compiling rlua v0.17.0 [INFO] [stderr] Checking rand v0.8.4 [INFO] [stderr] Compiling tokio-macros v1.3.0 [INFO] [stderr] Checking futures-executor v0.3.16 [INFO] [stderr] Checking futures v0.3.16 [INFO] [stderr] Checking serde_json v1.0.66 [INFO] [stderr] Checking multithreadluaexec v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused import: `tokio::sync::mpsc::Sender` [INFO] [stdout] --> src/main.rs:12:5 [INFO] [stdout] | [INFO] [stdout] 12 | use tokio::sync::mpsc::Sender; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `tokio::sync::mpsc::Sender` [INFO] [stdout] --> src/main.rs:12:5 [INFO] [stdout] | [INFO] [stdout] 12 | use tokio::sync::mpsc::Sender; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/load_balancer.rs:18:13 [INFO] [stdout] | [INFO] [stdout] 18 | let mut worker = &self.pool[worker_nr]; [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: variable does not need to be mutable [INFO] [stdout] --> src/load_balancer.rs:18:13 [INFO] [stdout] | [INFO] [stdout] 18 | let mut worker = &self.pool[worker_nr]; [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: `i` [INFO] [stdout] --> src/load_balancer.rs:9:13 [INFO] [stdout] | [INFO] [stdout] 9 | for i in 0..num { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_i` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `lua` [INFO] [stdout] --> src/main.rs:30:9 [INFO] [stdout] | [INFO] [stdout] 30 | let lua: Lua = Lua::new(); [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_lua` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `rx` [INFO] [stdout] --> src/main.rs:33:22 [INFO] [stdout] | [INFO] [stdout] 33 | let (tx, mut rx) = mpsc::channel(100); [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_rx` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:33:18 [INFO] [stdout] | [INFO] [stdout] 33 | let (tx, mut rx) = mpsc::channel(100); [INFO] [stdout] | ----^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `int_result` and `string_result` are never read [INFO] [stdout] --> src/types.rs:12:9 [INFO] [stdout] | [INFO] [stdout] 11 | pub struct LuaResult { [INFO] [stdout] | --------- fields in this struct [INFO] [stdout] 12 | pub int_result: Option, [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] 13 | pub string_result: Option, [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `server` is never read [INFO] [stdout] --> src/types.rs:18:9 [INFO] [stdout] | [INFO] [stdout] 16 | pub struct Worker { [INFO] [stdout] | ------ field in this struct [INFO] [stdout] 17 | pub sender: Sender<(LuaCode, Sender)>, [INFO] [stdout] 18 | pub server: JoinHandle, [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/worker.rs:20:29 [INFO] [stdout] | [INFO] [stdout] 20 | / ... res.clone() [INFO] [stdout] 21 | | ... .send(LuaResult { int_result: Some(0), string_result: Some("0".to_string()) }) [INFO] [stdout] 22 | | ... .await; [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] 20 | let _ = res.clone() [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/worker.rs:32:9 [INFO] [stdout] | [INFO] [stdout] 32 | self.sender.clone().send(res).await; [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] 32 | let _ = self.sender.clone().send(res).await; [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `i` [INFO] [stdout] --> src/load_balancer.rs:9:13 [INFO] [stdout] | [INFO] [stdout] 9 | for i in 0..num { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_i` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `lua` [INFO] [stdout] --> src/main.rs:30:9 [INFO] [stdout] | [INFO] [stdout] 30 | let lua: Lua = Lua::new(); [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_lua` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 10 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `rx` [INFO] [stdout] --> src/main.rs:33:22 [INFO] [stdout] | [INFO] [stdout] 33 | let (tx, mut rx) = mpsc::channel(100); [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_rx` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:33:18 [INFO] [stdout] | [INFO] [stdout] 33 | let (tx, mut rx) = mpsc::channel(100); [INFO] [stdout] | ----^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `int_result` and `string_result` are never read [INFO] [stdout] --> src/types.rs:12:9 [INFO] [stdout] | [INFO] [stdout] 11 | pub struct LuaResult { [INFO] [stdout] | --------- fields in this struct [INFO] [stdout] 12 | pub int_result: Option, [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] 13 | pub string_result: Option, [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `server` is never read [INFO] [stdout] --> src/types.rs:18:9 [INFO] [stdout] | [INFO] [stdout] 16 | pub struct Worker { [INFO] [stdout] | ------ field in this struct [INFO] [stdout] 17 | pub sender: Sender<(LuaCode, Sender)>, [INFO] [stdout] 18 | pub server: JoinHandle, [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/worker.rs:20:29 [INFO] [stdout] | [INFO] [stdout] 20 | / ... res.clone() [INFO] [stdout] 21 | | ... .send(LuaResult { int_result: Some(0), string_result: Some("0".to_string()) }) [INFO] [stdout] 22 | | ... .await; [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] 20 | let _ = res.clone() [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/worker.rs:32:9 [INFO] [stdout] | [INFO] [stdout] 32 | self.sender.clone().send(res).await; [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] 32 | let _ = self.sender.clone().send(res).await; [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 10 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 14.75s [INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: rlua v0.17.0 [INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1` [INFO] running `Command { std: "docker" "inspect" "20c5c01bf8b63f97995870c302e41931792fe9c34399385353d5e10560a3f06c", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "20c5c01bf8b63f97995870c302e41931792fe9c34399385353d5e10560a3f06c", kill_on_drop: false }` [INFO] [stdout] 20c5c01bf8b63f97995870c302e41931792fe9c34399385353d5e10560a3f06c