[INFO] cloning repository https://github.com/ukaushik-98/async-playground [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ukaushik-98/async-playground" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fukaushik-98%2Fasync-playground", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fukaushik-98%2Fasync-playground'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] fe67ecd1a98e685ae0fe0ecfac953421de0648d0 [INFO] checking ukaushik-98/async-playground against try#51000a35bc99aeffdc092bf2226ab562eedb9eff for pr-135899 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fukaushik-98%2Fasync-playground" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/ukaushik-98/async-playground on toolchain 51000a35bc99aeffdc092bf2226ab562eedb9eff [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+51000a35bc99aeffdc092bf2226ab562eedb9eff" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/ukaushik-98/async-playground [INFO] finished tweaking git repo https://github.com/ukaushik-98/async-playground [INFO] tweaked toml for git repo https://github.com/ukaushik-98/async-playground written to /workspace/builds/worker-5-tc2/source/Cargo.toml [INFO] crate git repo https://github.com/ukaushik-98/async-playground 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" "+51000a35bc99aeffdc092bf2226ab562eedb9eff" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:6475c868a6d27846ca172efb246699580b64b57a5b3744ef73949e850a31b38a" "/opt/rustwide/cargo-home/bin/cargo" "+51000a35bc99aeffdc092bf2226ab562eedb9eff" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 396290a370317f2edbf4820660e6f0698d3aee8427ed904e8d4fa793fef8f5ad [INFO] running `Command { std: "docker" "start" "-a" "396290a370317f2edbf4820660e6f0698d3aee8427ed904e8d4fa793fef8f5ad", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "396290a370317f2edbf4820660e6f0698d3aee8427ed904e8d4fa793fef8f5ad", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "396290a370317f2edbf4820660e6f0698d3aee8427ed904e8d4fa793fef8f5ad", kill_on_drop: false }` [INFO] [stdout] 396290a370317f2edbf4820660e6f0698d3aee8427ed904e8d4fa793fef8f5ad [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:6475c868a6d27846ca172efb246699580b64b57a5b3744ef73949e850a31b38a" "/opt/rustwide/cargo-home/bin/cargo" "+51000a35bc99aeffdc092bf2226ab562eedb9eff" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 325353bfd4a10f3d7670ab973bd8e262fb25090a396b7b500adea59aeeb741fc [INFO] running `Command { std: "docker" "start" "-a" "325353bfd4a10f3d7670ab973bd8e262fb25090a396b7b500adea59aeeb741fc", kill_on_drop: false }` [INFO] [stderr] Compiling proc-macro2 v1.0.93 [INFO] [stderr] Compiling libc v0.2.169 [INFO] [stderr] Compiling unicode-ident v1.0.14 [INFO] [stderr] Compiling autocfg v1.4.0 [INFO] [stderr] Checking utf8parse v0.2.2 [INFO] [stderr] Compiling parking_lot_core v0.9.10 [INFO] [stderr] Checking smallvec v1.13.2 [INFO] [stderr] Checking is_terminal_polyfill v1.70.1 [INFO] [stderr] Checking scopeguard v1.2.0 [INFO] [stderr] Checking anstyle v1.0.10 [INFO] [stderr] Checking anstyle-parse v0.2.6 [INFO] [stderr] Checking cfg-if v1.0.0 [INFO] [stderr] Checking anstyle-query v1.1.2 [INFO] [stderr] Checking colorchoice v1.0.3 [INFO] [stderr] Compiling heck v0.5.0 [INFO] [stderr] Checking clap_lex v0.7.4 [INFO] [stderr] Checking strsim v0.11.1 [INFO] [stderr] Checking anstream v0.6.18 [INFO] [stderr] Checking bytes v1.9.0 [INFO] [stderr] Checking pin-project-lite v0.2.16 [INFO] [stderr] Compiling lock_api v0.4.12 [INFO] [stderr] Compiling quote v1.0.38 [INFO] [stderr] Checking clap_builder v4.5.26 [INFO] [stderr] Compiling syn v2.0.96 [INFO] [stderr] Checking mio v1.0.3 [INFO] [stderr] Checking signal-hook-registry v1.4.2 [INFO] [stderr] Checking socket2 v0.5.8 [INFO] [stderr] Checking parking_lot v0.12.3 [INFO] [stderr] Compiling tokio-macros v2.5.0 [INFO] [stderr] Compiling clap_derive v4.5.24 [INFO] [stderr] Checking tokio v1.43.0 [INFO] [stderr] Checking clap v4.5.26 [INFO] [stderr] Checking async-playground v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused import: `runner2` [INFO] [stdout] --> src/lifetimes/mod.rs:3:22 [INFO] [stdout] | [INFO] [stdout] 3 | use runner::{runner, runner2, runner3}; [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `tokio::task` [INFO] [stdout] --> src/lifetimes/ref_users.rs:3:5 [INFO] [stdout] | [INFO] [stdout] 3 | use tokio::task; [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `runner2` [INFO] [stdout] --> src/lifetimes/mod.rs:3:22 [INFO] [stdout] | [INFO] [stdout] 3 | use runner::{runner, runner2, runner3}; [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `tokio::task` [INFO] [stdout] --> src/lifetimes/ref_users.rs:3:5 [INFO] [stdout] | [INFO] [stdout] 3 | use tokio::task; [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `names` [INFO] [stdout] --> src/lifetimes/mod.rs:69:22 [INFO] [stdout] | [INFO] [stdout] 69 | async fn garbage<'a>(names: &'a Vec<&String>) { [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_names` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `t` [INFO] [stdout] --> src/lifetimes/mod.rs:62:9 [INFO] [stdout] | [INFO] [stdout] 62 | let t = task::spawn(async { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_t` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `y` [INFO] [stdout] --> src/lifetimes/mod.rs:64:13 [INFO] [stdout] | [INFO] [stdout] 64 | let y = &x; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_y` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `x` [INFO] [stdout] --> src/lifetimes/ref_users.rs:36:43 [INFO] [stdout] | [INFO] [stdout] 36 | pub async fn runc>(x: T) {} [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_x` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `x` [INFO] [stdout] --> src/lifetimes/ref_users.rs:38:53 [INFO] [stdout] | [INFO] [stdout] 38 | pub async fn foo<'a, T: Send + std::fmt::Debug>(mut x: &'a mut T) { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_x` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/lifetimes/ref_users.rs:38:49 [INFO] [stdout] | [INFO] [stdout] 38 | pub async fn foo<'a, T: Send + std::fmt::Debug>(mut x: &'a mut T) { [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: `names` [INFO] [stdout] --> src/lifetimes/mod.rs:69:22 [INFO] [stdout] | [INFO] [stdout] 69 | async fn garbage<'a>(names: &'a Vec<&String>) { [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_names` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `t` [INFO] [stdout] --> src/lifetimes/mod.rs:62:9 [INFO] [stdout] | [INFO] [stdout] 62 | let t = task::spawn(async { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_t` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `y` [INFO] [stdout] --> src/lifetimes/mod.rs:64:13 [INFO] [stdout] | [INFO] [stdout] 64 | let y = &x; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_y` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `x` [INFO] [stdout] --> src/lifetimes/ref_users.rs:36:43 [INFO] [stdout] | [INFO] [stdout] 36 | pub async fn runc>(x: T) {} [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_x` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `x` [INFO] [stdout] --> src/lifetimes/spawn.rs:1:21 [INFO] [stdout] | [INFO] [stdout] 1 | async fn foo<'a, T>(x: T) [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_x` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `x` [INFO] [stdout] --> src/lifetimes/ref_users.rs:38:53 [INFO] [stdout] | [INFO] [stdout] 38 | pub async fn foo<'a, T: Send + std::fmt::Debug>(mut x: &'a mut T) { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_x` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/lifetimes/ref_users.rs:38:49 [INFO] [stdout] | [INFO] [stdout] 38 | pub async fn foo<'a, T: Send + std::fmt::Debug>(mut x: &'a mut T) { [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: `x` [INFO] [stdout] --> src/lifetimes/spawn.rs:1:21 [INFO] [stdout] | [INFO] [stdout] 1 | async fn foo<'a, T>(x: T) [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_x` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `x` [INFO] [stdout] --> src/send_sync/mod.rs:31:22 [INFO] [stdout] | [INFO] [stdout] 31 | fn foo_send(x: T) {} [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_x` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `x` [INFO] [stdout] --> src/send_sync/mod.rs:31:22 [INFO] [stdout] | [INFO] [stdout] 31 | fn foo_send(x: T) {} [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_x` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `foo` is never used [INFO] [stdout] --> src/lifetimes/spawn.rs:1:10 [INFO] [stdout] | [INFO] [stdout] 1 | async fn foo<'a, T>(x: T) [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `foo2` is never used [INFO] [stdout] --> src/lifetimes/spawn.rs:7:10 [INFO] [stdout] | [INFO] [stdout] 7 | async fn foo2<'a, T>(x: T) [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `foo` is never used [INFO] [stdout] --> src/send_sync/mod.rs:5:10 [INFO] [stdout] | [INFO] [stdout] 5 | async fn foo() { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `foo2` is never used [INFO] [stdout] --> src/send_sync/mod.rs:20:10 [INFO] [stdout] | [INFO] [stdout] 20 | async fn foo2() { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `foo_send` is never used [INFO] [stdout] --> src/send_sync/mod.rs:31:4 [INFO] [stdout] | [INFO] [stdout] 31 | fn foo_send(x: T) {} [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `run` is never used [INFO] [stdout] --> src/send_sync/mod.rs:33:10 [INFO] [stdout] | [INFO] [stdout] 33 | async fn run() { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/lifetimes/spawn.rs:13:5 [INFO] [stdout] | [INFO] [stdout] 13 | tokio::spawn(foo(x)).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] 13 | let _ = tokio::spawn(foo(x)).await; [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `foo` is never used [INFO] [stdout] --> src/lifetimes/spawn.rs:1:10 [INFO] [stdout] | [INFO] [stdout] 1 | async fn foo<'a, T>(x: T) [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `foo2` is never used [INFO] [stdout] --> src/lifetimes/spawn.rs:7:10 [INFO] [stdout] | [INFO] [stdout] 7 | async fn foo2<'a, T>(x: T) [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `foo` is never used [INFO] [stdout] --> src/send_sync/mod.rs:5:10 [INFO] [stdout] | [INFO] [stdout] 5 | async fn foo() { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `foo2` is never used [INFO] [stdout] --> src/send_sync/mod.rs:20:10 [INFO] [stdout] | [INFO] [stdout] 20 | async fn foo2() { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `foo_send` is never used [INFO] [stdout] --> src/send_sync/mod.rs:31:4 [INFO] [stdout] | [INFO] [stdout] 31 | fn foo_send(x: T) {} [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `run` is never used [INFO] [stdout] --> src/send_sync/mod.rs:33:10 [INFO] [stdout] | [INFO] [stdout] 33 | async fn run() { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/lifetimes/spawn.rs:13:5 [INFO] [stdout] | [INFO] [stdout] 13 | tokio::spawn(foo(x)).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] 13 | let _ = tokio::spawn(foo(x)).await; [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 16.63s [INFO] running `Command { std: "docker" "inspect" "325353bfd4a10f3d7670ab973bd8e262fb25090a396b7b500adea59aeeb741fc", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "325353bfd4a10f3d7670ab973bd8e262fb25090a396b7b500adea59aeeb741fc", kill_on_drop: false }` [INFO] [stdout] 325353bfd4a10f3d7670ab973bd8e262fb25090a396b7b500adea59aeeb741fc