[INFO] cloning repository https://github.com/ptonner/reinforce-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ptonner/reinforce-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fptonner%2Freinforce-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fptonner%2Freinforce-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] fca9066edf82f452b26a371ef3772240b4ec7e31
[INFO] building ptonner/reinforce-rust against try#9b5e8b16bd1c4acf4cf8e6880368314cf021a987+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fptonner%2Freinforce-rust" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ptonner/reinforce-rust on toolchain 9b5e8b16bd1c4acf4cf8e6880368314cf021a987
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9b5e8b16bd1c4acf4cf8e6880368314cf021a987" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ptonner/reinforce-rust
[INFO] finished tweaking git repo https://github.com/ptonner/reinforce-rust
[INFO] tweaked toml for git repo https://github.com/ptonner/reinforce-rust written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/ptonner/reinforce-rust 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" "+9b5e8b16bd1c4acf4cf8e6880368314cf021a987" "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
[ERROR] error running command: no output for 300 seconds
[INFO] building ptonner/reinforce-rust against try#9b5e8b16bd1c4acf4cf8e6880368314cf021a987+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fptonner%2Freinforce-rust" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ptonner/reinforce-rust on toolchain 9b5e8b16bd1c4acf4cf8e6880368314cf021a987
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9b5e8b16bd1c4acf4cf8e6880368314cf021a987" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ptonner/reinforce-rust
[INFO] finished tweaking git repo https://github.com/ptonner/reinforce-rust
[INFO] tweaked toml for git repo https://github.com/ptonner/reinforce-rust written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/ptonner/reinforce-rust 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" "+9b5e8b16bd1c4acf4cf8e6880368314cf021a987" "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-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+9b5e8b16bd1c4acf4cf8e6880368314cf021a987" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f41f0372bc48f6c67b683ef3d6b46a9c687802e417238caf6745b9a4bc0b190a
[INFO] running `Command { std: "docker" "start" "-a" "f41f0372bc48f6c67b683ef3d6b46a9c687802e417238caf6745b9a4bc0b190a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f41f0372bc48f6c67b683ef3d6b46a9c687802e417238caf6745b9a4bc0b190a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f41f0372bc48f6c67b683ef3d6b46a9c687802e417238caf6745b9a4bc0b190a", kill_on_drop: false }`
[INFO] [stdout] f41f0372bc48f6c67b683ef3d6b46a9c687802e417238caf6745b9a4bc0b190a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+9b5e8b16bd1c4acf4cf8e6880368314cf021a987" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c09663672d55dba52176bba2f42568eb9fb1160c6c5cf8330c1ba17a94b097fb
[INFO] running `Command { std: "docker" "start" "-a" "c09663672d55dba52176bba2f42568eb9fb1160c6c5cf8330c1ba17a94b097fb", kill_on_drop: false }`
[INFO] [stderr]    Compiling reinforce-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `from`
[INFO] [stdout]   --> src/main.rs:99:21
[INFO] [stdout]    |
[INFO] [stdout] 99 |     fn actions_from(from: &Self::State) -> HashSet<Self::Action> {
[INFO] [stdout]    |                     ^^^^ help: if this is intentional, prefix it with an underscore: `_from`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `from`
[INFO] [stdout]    --> src/main.rs:102:20
[INFO] [stdout]     |
[INFO] [stdout] 102 |     fn states_from(from: &Self::State, take: &Self::Action) -> HashSet<Self::State> {
[INFO] [stdout]     |                    ^^^^ help: if this is intentional, prefix it with an underscore: `_from`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `take`
[INFO] [stdout]    --> src/main.rs:102:40
[INFO] [stdout]     |
[INFO] [stdout] 102 |     fn states_from(from: &Self::State, take: &Self::Action) -> HashSet<Self::State> {
[INFO] [stdout]     |                                        ^^^^ help: if this is intentional, prefix it with an underscore: `_take`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.19s
[INFO] running `Command { std: "docker" "inspect" "c09663672d55dba52176bba2f42568eb9fb1160c6c5cf8330c1ba17a94b097fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c09663672d55dba52176bba2f42568eb9fb1160c6c5cf8330c1ba17a94b097fb", kill_on_drop: false }`
[INFO] [stdout] c09663672d55dba52176bba2f42568eb9fb1160c6c5cf8330c1ba17a94b097fb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+9b5e8b16bd1c4acf4cf8e6880368314cf021a987" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4cb1c5db84a239c2e19d0c732a2a1a4a3166e3fdc6e2a0b2fd250da0e4e6ff7e
[INFO] running `Command { std: "docker" "start" "-a" "4cb1c5db84a239c2e19d0c732a2a1a4a3166e3fdc6e2a0b2fd250da0e4e6ff7e", kill_on_drop: false }`
[INFO] [stderr]    Compiling reinforce-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `from`
[INFO] [stdout]   --> src/main.rs:99:21
[INFO] [stdout]    |
[INFO] [stdout] 99 |     fn actions_from(from: &Self::State) -> HashSet<Self::Action> {
[INFO] [stdout]    |                     ^^^^ help: if this is intentional, prefix it with an underscore: `_from`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `from`
[INFO] [stdout]    --> src/main.rs:102:20
[INFO] [stdout]     |
[INFO] [stdout] 102 |     fn states_from(from: &Self::State, take: &Self::Action) -> HashSet<Self::State> {
[INFO] [stdout]     |                    ^^^^ help: if this is intentional, prefix it with an underscore: `_from`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `take`
[INFO] [stdout]    --> src/main.rs:102:40
[INFO] [stdout]     |
[INFO] [stdout] 102 |     fn states_from(from: &Self::State, take: &Self::Action) -> HashSet<Self::State> {
[INFO] [stdout]     |                                        ^^^^ help: if this is intentional, prefix it with an underscore: `_take`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.11s
[INFO] running `Command { std: "docker" "inspect" "4cb1c5db84a239c2e19d0c732a2a1a4a3166e3fdc6e2a0b2fd250da0e4e6ff7e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4cb1c5db84a239c2e19d0c732a2a1a4a3166e3fdc6e2a0b2fd250da0e4e6ff7e", kill_on_drop: false }`
[INFO] [stdout] 4cb1c5db84a239c2e19d0c732a2a1a4a3166e3fdc6e2a0b2fd250da0e4e6ff7e