[INFO] fetching crate discord-retention-bot 1.0.2...
[INFO] testing discord-retention-bot-1.0.2 against 1.90.0 for beta-1.91-3
[INFO] extracting crate discord-retention-bot 1.0.2 into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate discord-retention-bot 1.0.2
[INFO] finished tweaking crates.io crate discord-retention-bot 1.0.2
[INFO] tweaked toml for crates.io crate discord-retention-bot 1.0.2 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate discord-retention-bot 1.0.2 on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate discord-retention-bot 1.0.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 006397689f30abf5557e75ce324f163a6febd0084938a763b76c2b2f0ee4a3eb
[INFO] running `Command { std: "docker" "start" "-a" "006397689f30abf5557e75ce324f163a6febd0084938a763b76c2b2f0ee4a3eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "006397689f30abf5557e75ce324f163a6febd0084938a763b76c2b2f0ee4a3eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "006397689f30abf5557e75ce324f163a6febd0084938a763b76c2b2f0ee4a3eb", kill_on_drop: false }`
[INFO] [stdout] 006397689f30abf5557e75ce324f163a6febd0084938a763b76c2b2f0ee4a3eb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 099b2e882fdefaf573bac210f1d4d7036003aa85a37b74f166c1d4aa3cc4d344
[INFO] running `Command { std: "docker" "start" "-a" "099b2e882fdefaf573bac210f1d4d7036003aa85a37b74f166c1d4aa3cc4d344", kill_on_drop: false }`
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[INFO] [stderr]    Compiling tracing-attributes v0.1.11
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[INFO] [stderr]    Compiling pin-project v1.0.2
[INFO] [stderr]    Compiling tracing v0.1.22
[INFO] [stderr]    Compiling futures-util v0.3.8
[INFO] [stderr]    Compiling regex v1.4.2
[INFO] [stderr]    Compiling pin-project v0.4.27
[INFO] [stderr]    Compiling tracing-futures v0.2.4
[INFO] [stderr]    Compiling thiserror-impl v1.0.22
[INFO] [stderr]    Compiling async-trait v0.1.42
[INFO] [stderr]    Compiling thiserror v1.0.22
[INFO] [stderr]    Compiling tokio-test v0.3.0
[INFO] [stderr]    Compiling env_logger v0.8.2
[INFO] [stderr]    Compiling tokio-util v0.3.1
[INFO] [stderr]    Compiling tokio-rustls v0.14.1
[INFO] [stderr]    Compiling futures-executor v0.3.8
[INFO] [stderr]    Compiling h2 v0.2.7
[INFO] [stderr]    Compiling async-tungstenite v0.9.3
[INFO] [stderr]    Compiling futures v0.3.8
[INFO] [stderr]    Compiling serde_urlencoded v0.7.0
[INFO] [stderr]    Compiling chrono v0.4.19
[INFO] [stderr]    Compiling hyper v0.13.9
[INFO] [stderr]    Compiling hyper-rustls v0.21.0
[INFO] [stderr]    Compiling reqwest v0.10.9
[INFO] [stderr]    Compiling discord-retention-bot v1.0.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(async_closure)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `async_closure` has been stable since `1.85.0` and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `async_closure` has been stable since 1.85.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(async_closure)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `discord-retention-bot` (bin "discord-retention-bot") due to 1 previous error; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "099b2e882fdefaf573bac210f1d4d7036003aa85a37b74f166c1d4aa3cc4d344", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "099b2e882fdefaf573bac210f1d4d7036003aa85a37b74f166c1d4aa3cc4d344", kill_on_drop: false }`
[INFO] [stdout] 099b2e882fdefaf573bac210f1d4d7036003aa85a37b74f166c1d4aa3cc4d344
