[INFO] fetching crate tau-engine 1.13.1...
[INFO] checking tau-engine-1.13.1 against try#de0e80659cee4f27282e60d63bbb8c5271a0d147 for pr-129392
[INFO] extracting crate tau-engine 1.13.1 into /workspace/builds/worker-0-tc2/source
[INFO] validating manifest of crates.io crate tau-engine 1.13.1 on toolchain de0e80659cee4f27282e60d63bbb8c5271a0d147
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+de0e80659cee4f27282e60d63bbb8c5271a0d147" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate tau-engine 1.13.1
[INFO] finished tweaking crates.io crate tau-engine 1.13.1
[INFO] tweaked toml for crates.io crate tau-engine 1.13.1 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" "+de0e80659cee4f27282e60d63bbb8c5271a0d147" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 27 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+de0e80659cee4f27282e60d63bbb8c5271a0d147" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+de0e80659cee4f27282e60d63bbb8c5271a0d147" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 67fe787c176ebeaaed77f8328a57b9fd9133a49ed3e482890a8e05841fc80fe6
[INFO] running `Command { std: "docker" "start" "-a" "67fe787c176ebeaaed77f8328a57b9fd9133a49ed3e482890a8e05841fc80fe6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "67fe787c176ebeaaed77f8328a57b9fd9133a49ed3e482890a8e05841fc80fe6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "67fe787c176ebeaaed77f8328a57b9fd9133a49ed3e482890a8e05841fc80fe6", kill_on_drop: false }`
[INFO] [stdout] 67fe787c176ebeaaed77f8328a57b9fd9133a49ed3e482890a8e05841fc80fe6
[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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+de0e80659cee4f27282e60d63bbb8c5271a0d147" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ae856ed3d75fabf5481dd9f9746683315b5c309aa8481f4995225e33847fd9b6
[INFO] running `Command { std: "docker" "start" "-a" "ae856ed3d75fabf5481dd9f9746683315b5c309aa8481f4995225e33847fd9b6", kill_on_drop: false }`
[INFO] [stderr]     Checking aho-corasick v1.1.3
[INFO] [stderr]     Checking unsafe-libyaml v0.2.11
[INFO] [stderr]    Compiling syn v2.0.77
[INFO] [stderr]     Checking regex-automata v0.4.7
[INFO] [stderr]     Checking regex v1.10.6
[INFO] [stderr]    Compiling serde_derive v1.0.209
[INFO] [stderr]    Compiling tracing-attributes v0.1.27
[INFO] [stderr]     Checking tracing v0.1.40
[INFO] [stderr]     Checking serde v1.0.209
[INFO] [stderr]     Checking serde_yaml v0.9.34+deprecated
[INFO] [stderr]     Checking tau-engine v1.13.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Number`
[INFO] [stdout]  --> src/yaml.rs:5:31
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub use serde_yaml::{Mapping, Number, Value as Yaml};
[INFO] [stdout]   |                               ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Number`
[INFO] [stdout]  --> src/yaml.rs:5:31
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub use serde_yaml::{Mapping, Number, Value as Yaml};
[INFO] [stdout]   |                               ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_rule` is never used
[INFO] [stdout]   --> benches/solve.rs:11:4
[INFO] [stdout]    |
[INFO] [stdout] 11 | fn print_rule(rule: &tau_engine::Rule) {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `load_rule` is never used
[INFO] [stdout]  --> benches/common.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn load_rule(prefix: &str, name: &str) -> Rule {
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `load_optimised_rule` is never used
[INFO] [stdout]   --> benches/common.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub fn load_optimised_rule(prefix: &str, name: &str) -> Rule {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 20.77s
[INFO] running `Command { std: "docker" "inspect" "ae856ed3d75fabf5481dd9f9746683315b5c309aa8481f4995225e33847fd9b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ae856ed3d75fabf5481dd9f9746683315b5c309aa8481f4995225e33847fd9b6", kill_on_drop: false }`
[INFO] [stdout] ae856ed3d75fabf5481dd9f9746683315b5c309aa8481f4995225e33847fd9b6