[INFO] fetching crate xc2par 0.0.2...
[INFO] checking xc2par-0.0.2 against master#936f2600b6c903b04387f74ed5cbce88bb06d243 for pr-91141
[INFO] extracting crate xc2par 0.0.2 into /workspace/builds/worker-77/source
[INFO] validating manifest of crates.io crate xc2par 0.0.2 on toolchain 936f2600b6c903b04387f74ed5cbce88bb06d243
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate xc2par 0.0.2
[INFO] finished tweaking crates.io crate xc2par 0.0.2
[INFO] tweaked toml for crates.io crate xc2par 0.0.2 written to /workspace/builds/worker-77/source/Cargo.toml
[INFO] crate crates.io crate xc2par 0.0.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "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-77/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-77/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" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f2e90858b9e8decd7c8109a9cc5b5adad114faf24c878676fbb22fe399ffe39f
[INFO] running `Command { std: "docker" "start" "-a" "f2e90858b9e8decd7c8109a9cc5b5adad114faf24c878676fbb22fe399ffe39f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f2e90858b9e8decd7c8109a9cc5b5adad114faf24c878676fbb22fe399ffe39f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f2e90858b9e8decd7c8109a9cc5b5adad114faf24c878676fbb22fe399ffe39f", kill_on_drop: false }`
[INFO] [stdout] f2e90858b9e8decd7c8109a9cc5b5adad114faf24c878676fbb22fe399ffe39f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-77/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-77/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" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b7fd5bac5667e92b9b4eee7fcec748bb8c2d6ed82466650084fe1ea353d63a7d
[INFO] running `Command { std: "docker" "start" "-a" "b7fd5bac5667e92b9b4eee7fcec748bb8c2d6ed82466650084fe1ea353d63a7d", 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] [stderr]     Checking libc v0.2.36
[INFO] [stderr]     Checking num-traits v0.2.0
[INFO] [stderr]    Compiling unicode-xid v0.0.4
[INFO] [stderr]    Compiling quote v0.3.15
[INFO] [stderr]     Checking slog v2.2.3
[INFO] [stderr]     Checking cfg-if v0.1.3
[INFO] [stderr]     Checking itoa v0.3.4
[INFO] [stderr]     Checking dtoa v0.4.2
[INFO] [stderr]     Checking serde v1.0.27
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking crossbeam v0.2.12
[INFO] [stderr]    Compiling xc2bit v0.0.4
[INFO] [stderr]     Checking byteorder v1.2.3
[INFO] [stderr]     Checking lazy_static v1.0.0
[INFO] [stderr]     Checking unicode-width v0.1.5
[INFO] [stderr]     Checking strsim v0.7.0
[INFO] [stderr]    Compiling xc2par v0.0.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking bitflags v1.0.1
[INFO] [stderr]     Checking jedec v0.0.3
[INFO] [stderr]    Compiling proc-macro2 v0.3.8
[INFO] [stderr]    Compiling synom v0.11.3
[INFO] [stderr]     Checking unreachable v1.0.0
[INFO] [stderr]     Checking log v0.4.1
[INFO] [stderr]     Checking thread_local v0.3.5
[INFO] [stderr]     Checking textwrap v0.9.0
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr]     Checking slog-scope v4.0.1
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]     Checking term v0.5.1
[INFO] [stderr]    Compiling quote v0.5.2
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]     Checking num-integer v0.1.36
[INFO] [stderr]    Compiling syn v0.13.11
[INFO] [stderr]     Checking slog-stdlog v3.0.2
[INFO] [stderr]     Checking time v0.1.40
[INFO] [stderr]     Checking atty v0.2.10
[INFO] [stderr]     Checking isatty v0.1.8
[INFO] [stderr]     Checking rand v0.4.2
[INFO] [stderr]     Checking clap v2.31.2
[INFO] [stderr]     Checking chrono v0.4.2
[INFO] [stderr]     Checking rand v0.3.22
[INFO] [stderr]    Compiling serde_derive_internals v0.19.0
[INFO] [stderr]     Checking slog-term v2.4.0
[INFO] [stderr]    Compiling serde_derive v1.0.27
[INFO] [stderr]     Checking serde_json v1.0.9
[INFO] [stderr]    Compiling bittwiddler v0.0.2
[INFO] [stderr]     Checking yosys-netlist-json v0.0.3
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/engine.rs:723:6
[INFO] [stdout]     |
[INFO] [stdout] 723 |     };
[INFO] [stdout]     |      ^ help: remove this semicolon
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/engine.rs:919:6
[INFO] [stdout]     |
[INFO] [stdout] 919 |     };
[INFO] [stdout]     |      ^ help: remove this semicolon
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/engine.rs:723:6
[INFO] [stdout]     |
[INFO] [stdout] 723 |     };
[INFO] [stdout]     |      ^ help: remove this semicolon
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/engine.rs:919:6
[INFO] [stdout]     |
[INFO] [stdout] 919 |     };
[INFO] [stdout]     |      ^ help: remove this semicolon
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `run_one_reftest`
[INFO] [stdout]     --> src/frontend.rs:1097:8
[INFO] [stdout]      |
[INFO] [stdout] 1097 |     fn run_one_reftest(input_filename: &'static str) {
[INFO] [stdout]      |        ^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `run_one_reftest`
[INFO] [stdout]     --> src/engine.rs:1549:8
[INFO] [stdout]      |
[INFO] [stdout] 1549 |     fn run_one_reftest(input_filename: &'static str) {
[INFO] [stdout]      |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `run_one_reftest`
[INFO] [stdout]     --> src/netlist.rs:1393:8
[INFO] [stdout]      |
[INFO] [stdout] 1393 |     fn run_one_reftest(input_filename: &'static str) {
[INFO] [stdout]      |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 14.94s
[INFO] running `Command { std: "docker" "inspect" "b7fd5bac5667e92b9b4eee7fcec748bb8c2d6ed82466650084fe1ea353d63a7d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b7fd5bac5667e92b9b4eee7fcec748bb8c2d6ed82466650084fe1ea353d63a7d", kill_on_drop: false }`
[INFO] [stdout] b7fd5bac5667e92b9b4eee7fcec748bb8c2d6ed82466650084fe1ea353d63a7d