[INFO] fetching crate chronofold 0.4.0...
[INFO] checking chronofold-0.4.0 against 1.55.0 for beta-1.56-3
[INFO] extracting crate chronofold 0.4.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate chronofold 0.4.0 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate chronofold 0.4.0
[INFO] finished tweaking crates.io crate chronofold 0.4.0
[INFO] tweaked toml for crates.io crate chronofold 0.4.0 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "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" "+1.55.0" "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-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f51a6a28e728394ea1d0f209f10cc715d2920d92945a8d0c9ce7d48895622377
[INFO] running `Command { std: "docker" "start" "-a" "f51a6a28e728394ea1d0f209f10cc715d2920d92945a8d0c9ce7d48895622377", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f51a6a28e728394ea1d0f209f10cc715d2920d92945a8d0c9ce7d48895622377", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f51a6a28e728394ea1d0f209f10cc715d2920d92945a8d0c9ce7d48895622377", kill_on_drop: false }`
[INFO] [stdout] f51a6a28e728394ea1d0f209f10cc715d2920d92945a8d0c9ce7d48895622377
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d08eeaa21b9856d15e1233bf5e5daa43ea517b5a1759e609241ec32cee423702
[INFO] running `Command { std: "docker" "start" "-a" "d08eeaa21b9856d15e1233bf5e5daa43ea517b5a1759e609241ec32cee423702", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling crossbeam-utils v0.8.5
[INFO] [stderr]    Compiling semver v1.0.4
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.5
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]     Checking itoa v0.4.8
[INFO] [stderr]    Compiling syn v1.0.80
[INFO] [stderr]     Checking plotters-backend v0.3.2
[INFO] [stderr]     Checking unicode-width v0.1.9
[INFO] [stderr]     Checking regex-automata v0.1.10
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]    Compiling anyhow v1.0.44
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]     Checking half v1.8.0
[INFO] [stderr]     Checking oorandom v11.1.3
[INFO] [stderr]     Checking chronofold v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling memoffset v0.6.4
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]     Checking itertools v0.10.1
[INFO] [stderr]     Checking serde v1.0.130
[INFO] [stderr]     Checking getrandom v0.1.16
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking plotters-svg v0.3.1
[INFO] [stderr]     Checking walkdir v2.3.2
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking plotters v0.3.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]    Compiling rustc_version v0.4.0
[INFO] [stderr]     Checking crossbeam-channel v0.5.1
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking crossbeam-deque v0.8.1
[INFO] [stderr]    Compiling cast v0.2.7
[INFO] [stderr]     Checking criterion-plot v0.4.4
[INFO] [stderr]     Checking serde_json v1.0.68
[INFO] [stderr]     Checking bstr v0.2.17
[INFO] [stderr]     Checking serde_cbor v0.11.2
[INFO] [stderr]     Checking csv v1.1.6
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]     Checking criterion v0.3.5
[INFO] [stdout] error[E0277]: the trait bound `Op<u8, &char>: serde::ser::Serialize` is not satisfied
[INFO] [stdout]     --> benches/dmonad.rs:242:51
[INFO] [stdout]      |
[INFO] [stdout] 242  |             total_ops_bytes += serde_json::to_vec(&op).unwrap().len();
[INFO] [stdout]      |                                                   ^^^ the trait `serde::ser::Serialize` is not implemented for `Op<u8, &char>`
[INFO] [stdout]      | 
[INFO] [stdout]     ::: /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde_json-1.0.68/src/ser.rs:2184:17
[INFO] [stdout]      |
[INFO] [stdout] 2184 |     T: ?Sized + Serialize,
[INFO] [stdout]      |                 --------- required by this bound in `to_vec`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `Chronofold<u8, char>: serde::ser::Serialize` is not satisfied
[INFO] [stdout]     --> benches/dmonad.rs:246:39
[INFO] [stdout]      |
[INFO] [stdout] 246  |     let doc_size = serde_json::to_vec(&cfold).unwrap().len();
[INFO] [stdout]      |                                       ^^^^^^ the trait `serde::ser::Serialize` is not implemented for `Chronofold<u8, char>`
[INFO] [stdout]      | 
[INFO] [stdout]     ::: /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde_json-1.0.68/src/ser.rs:2184:17
[INFO] [stdout]      |
[INFO] [stdout] 2184 |     T: ?Sized + Serialize,
[INFO] [stdout]      |                 --------- required by this bound in `to_vec`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `chronofold` due to 3 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "d08eeaa21b9856d15e1233bf5e5daa43ea517b5a1759e609241ec32cee423702", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d08eeaa21b9856d15e1233bf5e5daa43ea517b5a1759e609241ec32cee423702", kill_on_drop: false }`
[INFO] [stdout] d08eeaa21b9856d15e1233bf5e5daa43ea517b5a1759e609241ec32cee423702
