[INFO] cloning repository https://github.com/OneMore14/rust-playground
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/OneMore14/rust-playground" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FOneMore14%2Frust-playground", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FOneMore14%2Frust-playground'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] aa9dc26559417f99beced372f02d244141390010
[INFO] checking OneMore14/rust-playground against try#173780a87744406b7489b28349c0176f14bb3881 for pr-135841
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FOneMore14%2Frust-playground" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/OneMore14/rust-playground on toolchain 173780a87744406b7489b28349c0176f14bb3881
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+173780a87744406b7489b28349c0176f14bb3881" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/OneMore14/rust-playground
[INFO] finished tweaking git repo https://github.com/OneMore14/rust-playground
[INFO] tweaked toml for git repo https://github.com/OneMore14/rust-playground written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+173780a87744406b7489b28349c0176f14bb3881" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr] note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr] note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr] note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 40 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+173780a87744406b7489b28349c0176f14bb3881" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr] note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr] note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr] note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:c80049f3b88b82089a44e0f06d0d6029d44b96b7257e55a1cd63dbc9f4c33334" "/opt/rustwide/cargo-home/bin/cargo" "+173780a87744406b7489b28349c0176f14bb3881" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5f39c63d5b9fc7e852958ecb6fc0cde9b7567e53f98a66264bfe6c74a675f0d9
[INFO] running `Command { std: "docker" "start" "-a" "5f39c63d5b9fc7e852958ecb6fc0cde9b7567e53f98a66264bfe6c74a675f0d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5f39c63d5b9fc7e852958ecb6fc0cde9b7567e53f98a66264bfe6c74a675f0d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5f39c63d5b9fc7e852958ecb6fc0cde9b7567e53f98a66264bfe6c74a675f0d9", kill_on_drop: false }`
[INFO] [stdout] 5f39c63d5b9fc7e852958ecb6fc0cde9b7567e53f98a66264bfe6c74a675f0d9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:c80049f3b88b82089a44e0f06d0d6029d44b96b7257e55a1cd63dbc9f4c33334" "/opt/rustwide/cargo-home/bin/cargo" "+173780a87744406b7489b28349c0176f14bb3881" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 09497f5af35e61738e3ff312064bf5be8cc4eb7159b065b199d2f121b7bb847b
[INFO] running `Command { std: "docker" "start" "-a" "09497f5af35e61738e3ff312064bf5be8cc4eb7159b065b199d2f121b7bb847b", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr] note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr] note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr] note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr]    Compiling unicode-ident v1.0.15
[INFO] [stderr]     Checking smallvec v1.13.2
[INFO] [stderr]     Checking signal-hook-registry v1.4.2
[INFO] [stderr]    Compiling proc-macro2 v1.0.93
[INFO] [stderr]     Checking parking_lot_core v0.9.10
[INFO] [stderr]     Checking parking_lot v0.12.3
[INFO] [stderr]    Compiling quote v1.0.38
[INFO] [stderr]    Compiling syn v2.0.96
[INFO] [stderr]    Compiling tokio-macros v2.5.0
[INFO] [stderr]     Checking tokio v1.43.0
[INFO] [stderr]     Checking rust_lang v0.1.0 (/opt/rustwide/workdir/rust_lang)
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]   --> rust_lang/src/async_lang/async_closures.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     use super::*;
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `city_name`
[INFO] [stdout]   --> rust_lang/src/async_lang/async_closures.rs:13:23
[INFO] [stdout]    |
[INFO] [stdout] 13 | async fn do_something(city_name: &str) { todo!() }
[INFO] [stdout]    |                       ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_city_name`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `for_each_city` is never used
[INFO] [stdout]  --> rust_lang/src/async_lang/async_closures.rs:3:10
[INFO] [stdout]   |
[INFO] [stdout] 3 | async fn for_each_city<F, Fut>(mut f: F)
[INFO] [stdout]   |          ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `do_something` is never used
[INFO] [stdout]   --> rust_lang/src/async_lang/async_closures.rs:13:10
[INFO] [stdout]    |
[INFO] [stdout] 13 | async fn do_something(city_name: &str) { todo!() }
[INFO] [stdout]    |          ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `city_name`
[INFO] [stdout]   --> rust_lang/src/async_lang/async_closures.rs:13:23
[INFO] [stdout]    |
[INFO] [stdout] 13 | async fn do_something(city_name: &str) { todo!() }
[INFO] [stdout]    |                       ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_city_name`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `for_each_city` is never used
[INFO] [stdout]  --> rust_lang/src/async_lang/async_closures.rs:3:10
[INFO] [stdout]   |
[INFO] [stdout] 3 | async fn for_each_city<F, Fut>(mut f: F)
[INFO] [stdout]   |          ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `do_something` is never used
[INFO] [stdout]   --> rust_lang/src/async_lang/async_closures.rs:13:10
[INFO] [stdout]    |
[INFO] [stdout] 13 | async fn do_something(city_name: &str) { todo!() }
[INFO] [stdout]    |          ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 12.27s
[INFO] running `Command { std: "docker" "inspect" "09497f5af35e61738e3ff312064bf5be8cc4eb7159b065b199d2f121b7bb847b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "09497f5af35e61738e3ff312064bf5be8cc4eb7159b065b199d2f121b7bb847b", kill_on_drop: false }`
[INFO] [stdout] 09497f5af35e61738e3ff312064bf5be8cc4eb7159b065b199d2f121b7bb847b