[INFO] fetching crate roopes-derive 0.1.0...
[INFO] testing roopes-derive-0.1.0 against 1.91.0 for beta-1.92-2
[INFO] extracting crate roopes-derive 0.1.0 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate roopes-derive 0.1.0
[INFO] finished tweaking crates.io crate roopes-derive 0.1.0
[INFO] tweaked toml for crates.io crate roopes-derive 0.1.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate roopes-derive 0.1.0 on toolchain 1.91.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 36 packages to latest compatible versions
[INFO] [stderr]       Adding delegate v0.9.0 (available: v0.13.4)
[INFO] [stderr]       Adding derive-getters v0.3.0 (available: v0.5.0)
[INFO] [stderr]       Adding heck v0.4.1 (available: v0.5.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded trybuild v1.0.113
[INFO] [stderr]   Downloaded embed-doc-image v0.1.4
[INFO] [stderr]   Downloaded target-triple v1.0.0
[INFO] [stderr]   Downloaded delegate v0.9.0
[INFO] [stderr]   Downloaded enclose v1.2.1
[INFO] [stderr]   Downloaded derive-getters v0.3.0
[INFO] [stderr]   Downloaded roopes-core v0.1.1
[INFO] [stderr]   Downloaded toml v0.9.8
[INFO] [stderr]   Downloaded serde_spanned v1.0.3
[INFO] [stderr]   Downloaded toml_writer v1.0.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 957ebc8c5324cfc07ae3ff52d04a8fd99ef42e105b3178cf2469f53b04fa3f00
[INFO] running `Command { std: "docker" "start" "-a" "957ebc8c5324cfc07ae3ff52d04a8fd99ef42e105b3178cf2469f53b04fa3f00", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "957ebc8c5324cfc07ae3ff52d04a8fd99ef42e105b3178cf2469f53b04fa3f00", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "957ebc8c5324cfc07ae3ff52d04a8fd99ef42e105b3178cf2469f53b04fa3f00", kill_on_drop: false }`
[INFO] [stdout] 957ebc8c5324cfc07ae3ff52d04a8fd99ef42e105b3178cf2469f53b04fa3f00
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9bce162b20b1ff31cd08115bb54555279485e30ffd0ed8d0079eaf5570e882cd
[INFO] running `Command { std: "docker" "start" "-a" "9bce162b20b1ff31cd08115bb54555279485e30ffd0ed8d0079eaf5570e882cd", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling base64 v0.13.1
[INFO] [stderr]    Compiling enclose v1.2.1
[INFO] [stderr]    Compiling syn v2.0.108
[INFO] [stderr]    Compiling prettyplease v0.2.37
[INFO] [stderr]    Compiling embed-doc-image v0.1.4
[INFO] [stderr]    Compiling delegate v0.9.0
[INFO] [stderr]    Compiling derive-getters v0.3.0
[INFO] [stderr]    Compiling roopes-core v0.1.1
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/roopes-core-0.1.1/src/lib.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![feature(trait_alias)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/roopes-core-0.1.1/src/lib.rs:7:1
[INFO] [stdout]   |
[INFO] [stdout] 7 | #![feature(associated_type_bounds)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `associated_type_bounds` has been stable since `1.79.0` and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `roopes-core` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "9bce162b20b1ff31cd08115bb54555279485e30ffd0ed8d0079eaf5570e882cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9bce162b20b1ff31cd08115bb54555279485e30ffd0ed8d0079eaf5570e882cd", kill_on_drop: false }`
[INFO] [stdout] 9bce162b20b1ff31cd08115bb54555279485e30ffd0ed8d0079eaf5570e882cd