[INFO] fetching crate jsonrpc-server-utils 18.0.0...
[INFO] checking jsonrpc-server-utils-18.0.0 against try#c387b04bf028733cd561d62128c8a5eee4bc1458+rustflags=-Dtail_expr_drop_order for pr-130930
[INFO] extracting crate jsonrpc-server-utils 18.0.0 into /workspace/builds/worker-6-tc2/source
[INFO] validating manifest of crates.io crate jsonrpc-server-utils 18.0.0 on toolchain c387b04bf028733cd561d62128c8a5eee4bc1458
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate jsonrpc-server-utils 18.0.0
[INFO] finished tweaking crates.io crate jsonrpc-server-utils 18.0.0
[INFO] tweaked toml for crates.io crate jsonrpc-server-utils 18.0.0 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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 60 packages to latest compatible versions
[INFO] [stderr]       Adding hermit-abi v0.3.9 (available: v0.4.0)
[INFO] [stderr]       Adding tokio-util v0.6.10 (available: v0.7.12)
[INFO] [stderr]       Adding wasi v0.11.0+wasi-snapshot-preview1 (available: v0.13.2+wasi-0.2.1)
[INFO] [stderr]       Adding windows-sys v0.52.0 (available: v0.59.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5636d7b141ff3093023755cb0b0b2222e2d7380c49596795a6fc9e035aafa831
[INFO] running `Command { std: "docker" "start" "-a" "5636d7b141ff3093023755cb0b0b2222e2d7380c49596795a6fc9e035aafa831", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5636d7b141ff3093023755cb0b0b2222e2d7380c49596795a6fc9e035aafa831", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5636d7b141ff3093023755cb0b0b2222e2d7380c49596795a6fc9e035aafa831", kill_on_drop: false }`
[INFO] [stdout] 5636d7b141ff3093023755cb0b0b2222e2d7380c49596795a6fc9e035aafa831
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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 -Dtail_expr_drop_order" "-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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b63f4e75db019cbf811cb6208cf13ab53671c951706df6e7d8e1f63c18ba95c1
[INFO] running `Command { std: "docker" "start" "-a" "b63f4e75db019cbf811cb6208cf13ab53671c951706df6e7d8e1f63c18ba95c1", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.210
[INFO] [stderr]     Checking futures-channel v0.3.30
[INFO] [stderr]     Checking aho-corasick v1.1.3
[INFO] [stderr]     Checking regex-syntax v0.8.4
[INFO] [stderr]     Checking bstr v1.10.0
[INFO] [stderr]    Compiling syn v2.0.79
[INFO] [stderr]     Checking tokio v1.40.0
[INFO] [stderr]     Checking regex-automata v0.4.7
[INFO] [stderr]    Compiling futures-macro v0.3.30
[INFO] [stderr]    Compiling serde_derive v1.0.210
[INFO] [stderr]     Checking globset v0.4.15
[INFO] [stderr]     Checking serde_json v1.0.128
[INFO] [stderr]     Checking futures-util v0.3.30
[INFO] [stderr]     Checking tokio-util v0.6.10
[INFO] [stderr]     Checking tokio-stream v0.1.16
[INFO] [stderr]     Checking futures-executor v0.3.30
[INFO] [stderr]     Checking futures v0.3.30
[INFO] [stderr]     Checking jsonrpc-core v18.0.0
[INFO] [stderr]     Checking jsonrpc-server-utils v18.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `executor` is never read
[INFO] [stdout]   --> src/reactor.rs:78:2
[INFO] [stdout]    |
[INFO] [stdout] 77 | pub struct RpcEventLoop {
[INFO] [stdout]    |            ------------ field in this struct
[INFO] [stdout] 78 |     executor: TaskExecutor,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `RpcEventLoop` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `executor` is never read
[INFO] [stdout]   --> src/reactor.rs:78:2
[INFO] [stdout]    |
[INFO] [stdout] 77 | pub struct RpcEventLoop {
[INFO] [stdout]    |            ------------ field in this struct
[INFO] [stdout] 78 |     executor: TaskExecutor,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `RpcEventLoop` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 11.74s
[INFO] running `Command { std: "docker" "inspect" "b63f4e75db019cbf811cb6208cf13ab53671c951706df6e7d8e1f63c18ba95c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b63f4e75db019cbf811cb6208cf13ab53671c951706df6e7d8e1f63c18ba95c1", kill_on_drop: false }`
[INFO] [stdout] b63f4e75db019cbf811cb6208cf13ab53671c951706df6e7d8e1f63c18ba95c1