[INFO] fetching crate razor-chase 0.1.0...
[INFO] checking razor-chase-0.1.0 against try#cac44d9528e3bbbdaa1537d187bd489ccc5de18c for pr-91141
[INFO] extracting crate razor-chase 0.1.0 into /workspace/builds/worker-74/source
[INFO] validating manifest of crates.io crate razor-chase 0.1.0 on toolchain cac44d9528e3bbbdaa1537d187bd489ccc5de18c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate razor-chase 0.1.0
[INFO] finished tweaking crates.io crate razor-chase 0.1.0
[INFO] tweaked toml for crates.io crate razor-chase 0.1.0 written to /workspace/builds/worker-74/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "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-74/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-74/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4e1c589ca5c083e46d4a8485c77299e95406787e3cfbc07d2f43ab0d982d7b2e
[INFO] running `Command { std: "docker" "start" "-a" "4e1c589ca5c083e46d4a8485c77299e95406787e3cfbc07d2f43ab0d982d7b2e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4e1c589ca5c083e46d4a8485c77299e95406787e3cfbc07d2f43ab0d982d7b2e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4e1c589ca5c083e46d4a8485c77299e95406787e3cfbc07d2f43ab0d982d7b2e", kill_on_drop: false }`
[INFO] [stdout] 4e1c589ca5c083e46d4a8485c77299e95406787e3cfbc07d2f43ab0d982d7b2e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-74/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-74/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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cb191b855b29e8bdf2a1c2f31c1053ec1932ae4f744faac8cd3b4dda5b6c52b6
[INFO] running `Command { std: "docker" "start" "-a" "cb191b855b29e8bdf2a1c2f31c1053ec1932ae4f744faac8cd3b4dda5b6c52b6", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.82
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]     Checking rand_core v0.4.2
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]    Compiling version_check v0.1.5
[INFO] [stderr]     Checking cast v0.1.0
[INFO] [stderr]    Compiling serde_json v1.0.72
[INFO] [stderr]     Checking unicode-width v0.1.9
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking term v0.4.6
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[INFO] [stderr]     Checking ansi_term v0.11.0
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[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking pin-project-lite v0.2.7
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling backtrace v0.3.63
[INFO] [stderr]     Checking num_cpus v0.2.13
[INFO] [stderr]     Checking serde v1.0.130
[INFO] [stderr]     Checking isatty v0.1.9
[INFO] [stderr]     Checking log v0.3.9
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[INFO] [stderr]     Checking itertools v0.5.10
[INFO] [stderr]     Checking itertools v0.7.11
[INFO] [stderr]    Compiling nom v4.2.3
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking rand_xorshift v0.1.1
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[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking criterion-plot v0.1.3
[INFO] [stderr]     Checking nom_locate v0.3.1
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]     Checking criterion-stats v0.1.3
[INFO] [stderr]    Compiling synstructure v0.12.6
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]    Compiling tracing-attributes v0.1.18
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking razor-fol v0.1.0
[INFO] [stderr]     Checking tracing v0.1.29
[INFO] [stderr]     Checking criterion v0.1.2
[INFO] [stderr]     Checking razor-chase v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused return value of `std::convert::From::from` that must be used
[INFO] [stdout]    --> src/chase/impl/basic.rs:939:9
[INFO] [stdout]     |
[INFO] [stdout] 939 |         Sequent::from(&"true".parse().unwrap());
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::convert::From::from` that must be used
[INFO] [stdout]    --> src/chase/impl/basic.rs:945:9
[INFO] [stdout]     |
[INFO] [stdout] 945 |         Sequent::from(&"false".parse().unwrap());
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::convert::From::from` that must be used
[INFO] [stdout]    --> src/chase/impl/basic.rs:951:9
[INFO] [stdout]     |
[INFO] [stdout] 951 |         Sequent::from(&"false -> true".parse().unwrap());
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::convert::From::from` that must be used
[INFO] [stdout]    --> src/chase/impl/basic.rs:957:9
[INFO] [stdout]     |
[INFO] [stdout] 957 |         Sequent::from(&"(P(x) | Q(x)) -> R(x)".parse().unwrap());
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::convert::From::from` that must be used
[INFO] [stdout]    --> src/chase/impl/basic.rs:963:9
[INFO] [stdout]     |
[INFO] [stdout] 963 |         Sequent::from(&"P(x) -> R(x) & (Q(z) | R(z))".parse().unwrap());
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::convert::From::from` that must be used
[INFO] [stdout]    --> src/chase/impl/basic.rs:969:9
[INFO] [stdout]     |
[INFO] [stdout] 969 |         Sequent::from(&"P(x) -> ?x. Q(x)".parse().unwrap());
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::convert::From::from` that must be used
[INFO] [stdout]    --> src/chase/impl/basic.rs:975:9
[INFO] [stdout]     |
[INFO] [stdout] 975 |         Sequent::from(&"?x.Q(x) -> P(x)".parse().unwrap());
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::convert::From::from` that must be used
[INFO] [stdout]    --> src/chase/impl/basic.rs:981:9
[INFO] [stdout]     |
[INFO] [stdout] 981 |         Sequent::from(&"true -> ~false".parse().unwrap());
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::convert::From::from` that must be used
[INFO] [stdout]    --> src/chase/impl/basic.rs:987:9
[INFO] [stdout]     |
[INFO] [stdout] 987 |         Sequent::from(&"true -> ~true".parse().unwrap());
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::convert::From::from` that must be used
[INFO] [stdout]    --> src/chase/impl/basic.rs:993:9
[INFO] [stdout]     |
[INFO] [stdout] 993 |         Sequent::from(&"~P(x) -> ~Q(x)".parse().unwrap());
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 24.87s
[INFO] running `Command { std: "docker" "inspect" "cb191b855b29e8bdf2a1c2f31c1053ec1932ae4f744faac8cd3b4dda5b6c52b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cb191b855b29e8bdf2a1c2f31c1053ec1932ae4f744faac8cd3b4dda5b6c52b6", kill_on_drop: false }`
[INFO] [stdout] cb191b855b29e8bdf2a1c2f31c1053ec1932ae4f744faac8cd3b4dda5b6c52b6