[INFO] fetching crate mcircuit 0.1.7...
[INFO] checking mcircuit-0.1.7 against master#8007b506ac5da629f223b755f5a5391edd5f6d01 for pr-88041
[INFO] extracting crate mcircuit 0.1.7 into /workspace/builds/worker-67/source
[INFO] validating manifest of crates.io crate mcircuit 0.1.7 on toolchain 8007b506ac5da629f223b755f5a5391edd5f6d01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-67/source/rust-toolchain
[INFO] started tweaking crates.io crate mcircuit 0.1.7
[INFO] finished tweaking crates.io crate mcircuit 0.1.7
[INFO] tweaked toml for crates.io crate mcircuit 0.1.7 written to /workspace/builds/worker-67/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "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" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-67/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-67/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 10efa0a23f2f3d124dfc883237d245d71a377bc9ad322b9c784967dc5353d16c
[INFO] running `Command { std: "docker" "start" "-a" "10efa0a23f2f3d124dfc883237d245d71a377bc9ad322b9c784967dc5353d16c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "10efa0a23f2f3d124dfc883237d245d71a377bc9ad322b9c784967dc5353d16c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "10efa0a23f2f3d124dfc883237d245d71a377bc9ad322b9c784967dc5353d16c", kill_on_drop: false }`
[INFO] [stdout] 10efa0a23f2f3d124dfc883237d245d71a377bc9ad322b9c784967dc5353d16c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-67/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-67/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6cbe2e764612bc4f1a99d48e4a94defc5f0b6b663e0e6f5bd0e16a5e50829901
[INFO] running `Command { std: "docker" "start" "-a" "6cbe2e764612bc4f1a99d48e4a94defc5f0b6b663e0e6f5bd0e16a5e50829901", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.28
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]    Compiling serde_derive v1.0.127
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling serde v1.0.127
[INFO] [stderr]    Compiling serde_json v1.0.66
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling lexpr-macros v0.2.1
[INFO] [stderr]     Checking lexpr v0.2.6
[INFO] [stderr]    Compiling variant_count v1.1.0
[INFO] [stderr]     Checking bincode v1.3.3
[INFO] [stderr]     Checking mcircuit v0.1.7 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Cons`
[INFO] [stdout]   --> src/parsers/smtlib.rs:30:17
[INFO] [stdout]    |
[INFO] [stdout] 30 |     use lexpr::{Cons, Value};
[INFO] [stdout]    |                 ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `sample`
[INFO] [stdout]   --> src/parsers/smtlib.rs:75:8
[INFO] [stdout]    |
[INFO] [stdout] 75 |     fn sample() -> String {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 16.66s
[INFO] running `Command { std: "docker" "inspect" "6cbe2e764612bc4f1a99d48e4a94defc5f0b6b663e0e6f5bd0e16a5e50829901", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6cbe2e764612bc4f1a99d48e4a94defc5f0b6b663e0e6f5bd0e16a5e50829901", kill_on_drop: false }`
[INFO] [stdout] 6cbe2e764612bc4f1a99d48e4a94defc5f0b6b663e0e6f5bd0e16a5e50829901