[INFO] cloning repository https://github.com/Atte/discord-bot
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Atte/discord-bot" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAtte%2Fdiscord-bot", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAtte%2Fdiscord-bot'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] fd6072213c27f9ff790f35a99336b7af8f7e01e9
[INFO] testing Atte/discord-bot against beta-2021-05-23 for beta-1.52-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAtte%2Fdiscord-bot" "/workspace/builds/worker-11/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-11/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Atte/discord-bot on toolchain beta-2021-05-23
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-05-23" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Atte/discord-bot
[INFO] finished tweaking git repo https://github.com/Atte/discord-bot
[INFO] tweaked toml for git repo https://github.com/Atte/discord-bot written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate git repo https://github.com/Atte/discord-bot already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-05-23" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] Downloading crates ...
[INFO] [stderr] Downloaded darling_core v0.12.4
[INFO] [stderr] Downloaded pbkdf2 v0.7.5
[INFO] [stderr] Downloaded font-kit v0.7.1
[INFO] [stderr] Downloaded meval v0.2.0
[INFO] [stderr] Downloaded serde_with v1.9.0
[INFO] [stderr] Downloaded command_attr v0.3.5
[INFO] [stderr] Downloaded trust-dns-resolver v0.20.2
[INFO] [stderr] Downloaded darling_macro v0.12.4
[INFO] [stderr] Downloaded tokio-stream v0.1.5
[INFO] [stderr] Downloaded darling v0.12.4
[INFO] [stderr] Downloaded mongodb v2.0.0-alpha.1
[INFO] [stderr] Downloaded stable-eyre v0.2.2
[INFO] [stderr] Downloaded cpufeatures v0.1.1
[INFO] [stderr] Downloaded tabwriter v1.2.1
[INFO] [stderr] Downloaded serde-aux v2.2.0
[INFO] [stderr] Downloaded indenter v0.3.3
[INFO] [stderr] Downloaded trust-dns-proto v0.20.2
[INFO] [stderr] Downloaded serenity v0.10.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-05-23" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 25893ac353be25ee7eb23d61093bca29a7db4af0ab93c6fdc1e40d2d746c6953
[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" "25893ac353be25ee7eb23d61093bca29a7db4af0ab93c6fdc1e40d2d746c6953", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "25893ac353be25ee7eb23d61093bca29a7db4af0ab93c6fdc1e40d2d746c6953", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "25893ac353be25ee7eb23d61093bca29a7db4af0ab93c6fdc1e40d2d746c6953", kill_on_drop: false }`
[INFO] [stdout] 25893ac353be25ee7eb23d61093bca29a7db4af0ab93c6fdc1e40d2d746c6953
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-05-23" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 0ae828a1d796ae4c5843d2e7ea845a8dcf5eb1c85e2f6aed5386a63bde02f480
[INFO] running `Command { std: "docker" "start" "-a" "0ae828a1d796ae4c5843d2e7ea845a8dcf5eb1c85e2f6aed5386a63bde02f480", kill_on_drop: false }`
[INFO] [stderr] Compiling libc v0.2.94
[INFO] [stderr] Compiling proc-macro2 v1.0.26
[INFO] [stderr] Compiling unicode-xid v0.2.2
[INFO] [stderr] Compiling syn v1.0.72
[INFO] [stderr] Compiling cc v1.0.67
[INFO] [stderr] Compiling log v0.4.14
[INFO] [stderr] Compiling memchr v2.4.0
[INFO] [stderr] Compiling version_check v0.9.3
[INFO] [stderr] Compiling pin-project-lite v0.2.6
[INFO] [stderr] Compiling once_cell v1.7.2
[INFO] [stderr] Compiling futures-core v0.3.15
[INFO] [stderr] Compiling futures-task v0.3.15
[INFO] [stderr] Compiling serde_derive v1.0.125
[INFO] [stderr] Compiling typenum v1.13.0
[INFO] [stderr] Compiling futures-channel v0.3.15
[INFO] [stderr] Compiling futures-sink v0.3.15
[INFO] [stderr] Compiling serde v1.0.125
[INFO] [stderr] Compiling slab v0.4.3
[INFO] [stderr] Compiling futures-io v0.3.15
[INFO] [stderr] Compiling getrandom v0.1.16
[INFO] [stderr] Compiling byteorder v1.4.3
[INFO] [stderr] Compiling httparse v1.4.1
[INFO] [stderr] Compiling openssl v0.10.34
[INFO] [stderr] Compiling serde_json v1.0.64
[INFO] [stderr] Compiling cpufeatures v0.1.1
[INFO] [stderr] Compiling httpdate v1.0.0
[INFO] [stderr] Compiling async-trait v0.1.50
[INFO] [stderr] Compiling openssl-probe v0.1.4
[INFO] [stderr] Compiling ident_case v1.0.1
[INFO] [stderr] Compiling encoding_rs v0.8.28
[INFO] [stderr] Compiling adler v1.0.2
[INFO] [stderr] Compiling rustversion v1.0.4
[INFO] [stderr] Compiling adler32 v1.2.0
[INFO] [stderr] Compiling gimli v0.24.0
[INFO] [stderr] Compiling utf-8 v0.7.6
[INFO] [stderr] Compiling eyre v0.6.5
[INFO] [stderr] Compiling float-ord v0.2.0
[INFO] [stderr] Compiling hex v0.4.3
[INFO] [stderr] Compiling object v0.24.0
[INFO] [stderr] Compiling regex-syntax v0.6.25
[INFO] [stderr] Compiling plotters-backend v0.3.0
[INFO] [stderr] Compiling serenity v0.10.5
[INFO] [stderr] Compiling indenter v0.3.3
[INFO] [stderr] Compiling rustc-demangle v0.1.19
[INFO] [stderr] Compiling bytemuck v1.5.1
[INFO] [stderr] Compiling color_quant v1.1.0
[INFO] [stderr] Compiling typemap_rev v0.1.5
[INFO] [stderr] Compiling uwl v0.6.0
[INFO] [stderr] Compiling nom v1.2.4
[INFO] [stderr] Compiling tokio v1.5.0
[INFO] [stderr] Compiling futures-macro v0.3.15
[INFO] [stderr] Compiling futures-util v0.3.15
[INFO] [stderr] Compiling indexmap v1.6.2
[INFO] [stderr] Compiling miniz_oxide v0.4.4
[INFO] [stderr] Compiling num-rational v0.3.2
[INFO] [stderr] Compiling num-iter v0.1.42
[INFO] [stderr] Compiling servo-fontconfig-sys v4.0.9
[INFO] [stderr] Compiling http v0.2.4
[INFO] [stderr] Compiling tracing-core v0.1.18
[INFO] [stderr] Compiling unicode-bidi v0.3.5
[INFO] [stderr] Compiling tinyvec v1.2.0
[INFO] [stderr] Compiling form_urlencoded v1.0.1
[INFO] [stderr] Compiling lock_api v0.4.4
[INFO] [stderr] Compiling generic-array v0.14.4
[INFO] [stderr] Compiling unicase v2.6.0
[INFO] [stderr] Compiling input_buffer v0.3.1
[INFO] [stderr] Compiling cmake v0.1.45
[INFO] [stderr] Compiling stb_truetype v0.3.1
[INFO] [stderr] Compiling walkdir v2.3.2
[INFO] [stderr] Compiling miniz_oxide v0.3.7
[INFO] [stderr] Compiling deflate v0.8.6
[INFO] [stderr] Compiling tabwriter v1.2.1
[INFO] [stderr] Compiling itertools v0.10.0
[INFO] [stderr] Compiling plotters-bitmap v0.3.0
[INFO] [stderr] Compiling meval v0.2.0
[INFO] [stderr] Compiling ring v0.16.20
[INFO] [stderr] Compiling openssl-sys v0.9.63
[INFO] [stderr] Compiling backtrace v0.3.59
[INFO] [stderr] Compiling servo-freetype-sys v4.0.5
[INFO] [stderr] Compiling expat-sys v2.1.6
[INFO] [stderr] Compiling pathfinder_simd v0.5.0
[INFO] [stderr] Compiling unicode-normalization v0.1.17
[INFO] [stderr] Compiling want v0.3.0
[INFO] [stderr] Compiling os_info v3.0.4
[INFO] [stderr] Compiling png v0.16.8
[INFO] [stderr] Compiling ordered-float v1.1.1
[INFO] [stderr] Compiling approx v0.3.2
[INFO] [stderr] Compiling aho-corasick v0.7.18
[INFO] [stderr] Compiling quote v1.0.9
[INFO] [stderr] Compiling addr2line v0.15.1
[INFO] [stderr] Compiling http-body v0.4.2
[INFO] [stderr] Compiling num_cpus v1.13.0
[INFO] [stderr] Compiling mio v0.7.11
[INFO] [stderr] Compiling getrandom v0.2.2
[INFO] [stderr] Compiling socket2 v0.4.0
[INFO] [stderr] Compiling time v0.1.43
[INFO] [stderr] Compiling hostname v0.3.1
[INFO] [stderr] Compiling parking_lot_core v0.8.3
[INFO] [stderr] Compiling dirs-sys v0.3.6
[INFO] [stderr] Compiling atty v0.2.14
[INFO] [stderr] Compiling rusttype v0.8.3
[INFO] [stderr] Compiling mime_guess v2.0.3
[INFO] [stderr] Compiling rand_core v0.5.1
[INFO] [stderr] Compiling flate2 v1.0.20
[INFO] [stderr] Compiling rand_core v0.6.2
[INFO] [stderr] Compiling uuid v0.8.2
[INFO] [stderr] Compiling resolv-conf v0.7.0
[INFO] [stderr] Compiling dirs v2.0.2
[INFO] [stderr] Compiling idna v0.2.3
[INFO] [stderr] Compiling stringprep v0.1.2
[INFO] [stderr] Compiling parking_lot v0.11.1
[INFO] [stderr] Compiling native-tls v0.2.7
[INFO] [stderr] Compiling regex v1.5.4
[INFO] [stderr] Compiling digest v0.9.0
[INFO] [stderr] Compiling block-buffer v0.9.0
[INFO] [stderr] Compiling crypto-mac v0.10.0
[INFO] [stderr] Compiling rand_chacha v0.2.2
[INFO] [stderr] Compiling rand_chacha v0.3.0
[INFO] [stderr] Compiling image v0.23.14
[INFO] [stderr] Compiling freetype v0.4.1
[INFO] [stderr] Compiling stable-eyre v0.2.2
[INFO] [stderr] Compiling sha-1 v0.9.6
[INFO] [stderr] Compiling md-5 v0.9.1
[INFO] [stderr] Compiling sha2 v0.9.5
[INFO] [stderr] Compiling hmac v0.10.1
[INFO] [stderr] Compiling pbkdf2 v0.7.5
[INFO] [stderr] Compiling url v2.2.2
[INFO] [stderr] Compiling servo-fontconfig v0.4.0
[INFO] [stderr] Compiling rand v0.7.3
[INFO] [stderr] Compiling rand v0.8.3
[INFO] [stderr] Compiling pathfinder_geometry v0.5.1
[INFO] [stderr] Compiling env_logger v0.8.3
[INFO] [stderr] Compiling font-kit v0.7.1
[INFO] [stderr] Compiling webpki v0.21.4
[INFO] [stderr] Compiling sct v0.6.1
[INFO] [stderr] Compiling tungstenite v0.11.1
[INFO] [stderr] Compiling rustls v0.19.1
[INFO] [stderr] Compiling webpki-roots v0.21.1
[INFO] [stderr] Compiling webpki-roots v0.20.0
[INFO] [stderr] Compiling darling_core v0.12.4
[INFO] [stderr] Compiling tokio-macros v1.1.0
[INFO] [stderr] Compiling pin-project-internal v1.0.7
[INFO] [stderr] Compiling tracing-attributes v0.1.15
[INFO] [stderr] Compiling thiserror-impl v1.0.24
[INFO] [stderr] Compiling enum-as-inner v0.3.3
[INFO] [stderr] Compiling derivative v2.2.0
[INFO] [stderr] Compiling typed-builder v0.4.1
[INFO] [stderr] Compiling command_attr v0.3.5
[INFO] [stderr] Compiling darling_macro v0.12.4
[INFO] [stderr] Compiling thiserror v1.0.24
[INFO] [stderr] Compiling darling v0.12.4
[INFO] [stderr] Compiling tracing v0.1.26
[INFO] [stderr] Compiling serde_with_macros v1.4.1
[INFO] [stderr] Compiling pin-project v1.0.7
[INFO] [stderr] Compiling futures-executor v0.3.15
[INFO] [stderr] Compiling futures v0.3.15
[INFO] [stderr] Compiling tokio-util v0.6.6
[INFO] [stderr] Compiling tokio-rustls v0.22.0
[INFO] [stderr] Compiling tokio-native-tls v0.3.0
[INFO] [stderr] Compiling trust-dns-proto v0.20.2
[INFO] [stderr] Compiling tokio-stream v0.1.5
[INFO] [stderr] Compiling async-tungstenite v0.11.0
[INFO] [stderr] Compiling h2 v0.3.3
[INFO] [stderr] Compiling trust-dns-resolver v0.20.2
[INFO] [stderr] Compiling chrono v0.4.19
[INFO] [stderr] Compiling serde_urlencoded v0.7.0
[INFO] [stderr] Compiling serde_bytes v0.11.5
[INFO] [stderr] Compiling serde_with v1.9.0
[INFO] [stderr] Compiling toml v0.5.8
[INFO] [stderr] Compiling plotters v0.3.0
[INFO] [stderr] Compiling bson v1.2.2
[INFO] [stderr] Compiling serde-aux v2.2.0
[INFO] [stderr] Compiling hyper v0.14.7
[INFO] [stderr] Compiling hyper-rustls v0.22.1
[INFO] [stderr] Compiling hyper-tls v0.5.0
[INFO] [stderr] Compiling reqwest v0.11.3
[INFO] [stderr] Compiling mongodb v2.0.0-alpha.1
[INFO] [stderr] Compiling discord-bot v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `first_entry`
[INFO] [stdout] --> src/serialization.rs:51:8
[INFO] [stdout] |
[INFO] [stdout] 51 | pub fn first_entry<'de, T, D>(deserializer: D) -> Result