[INFO] fetching crate xc2bit 0.0.4...
[INFO] checking xc2bit-0.0.4 against master#da897dfb6daa268a965d2d73620316ba56020a19 for pr-76219
[INFO] extracting crate xc2bit 0.0.4 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate xc2bit 0.0.4 on toolchain da897dfb6daa268a965d2d73620316ba56020a19
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+da897dfb6daa268a965d2d73620316ba56020a19" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate xc2bit 0.0.4
[INFO] finished tweaking crates.io crate xc2bit 0.0.4
[INFO] tweaked toml for crates.io crate xc2bit 0.0.4 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate crates.io crate xc2bit 0.0.4 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+da897dfb6daa268a965d2d73620316ba56020a19" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+da897dfb6daa268a965d2d73620316ba56020a19" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7e2c76b101a0b3e7e6412f6b766a22f23ba0d88c8aca3e687b0787ae99a2adeb
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "7e2c76b101a0b3e7e6412f6b766a22f23ba0d88c8aca3e687b0787ae99a2adeb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7e2c76b101a0b3e7e6412f6b766a22f23ba0d88c8aca3e687b0787ae99a2adeb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7e2c76b101a0b3e7e6412f6b766a22f23ba0d88c8aca3e687b0787ae99a2adeb", kill_on_drop: false }`
[INFO] [stdout] 7e2c76b101a0b3e7e6412f6b766a22f23ba0d88c8aca3e687b0787ae99a2adeb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+da897dfb6daa268a965d2d73620316ba56020a19" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 379cc170771c9e6850daee1b48b7c6150d2309a95ff3d340d35ca0d6b7552460
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "379cc170771c9e6850daee1b48b7c6150d2309a95ff3d340d35ca0d6b7552460", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]     Checking num-traits v0.2.0
[INFO] [stderr]     Checking dtoa v0.4.2
[INFO] [stderr]     Checking serde v1.0.27
[INFO] [stderr]    Compiling xc2bit v0.0.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking jedec v0.0.3
[INFO] [stderr]    Compiling serde_derive_internals v0.19.0
[INFO] [stderr]    Compiling proc-macro2 v0.3.6
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]    Compiling quote v0.5.1
[INFO] [stderr]    Compiling serde_derive v1.0.27
[INFO] [stderr]    Compiling syn v0.13.1
[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: function is never used: `run_one_reftest`
[INFO] [stdout]    --> src/lib.rs:123:8
[INFO] [stdout]     |
[INFO] [stdout] 123 |     fn run_one_reftest(jed_filename: &'static str) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 24.58s
[INFO] running `Command { std: "docker" "inspect" "379cc170771c9e6850daee1b48b7c6150d2309a95ff3d340d35ca0d6b7552460", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "379cc170771c9e6850daee1b48b7c6150d2309a95ff3d340d35ca0d6b7552460", kill_on_drop: false }`
[INFO] [stdout] 379cc170771c9e6850daee1b48b7c6150d2309a95ff3d340d35ca0d6b7552460