[INFO] fetching crate moto-rt 0.15.0...
[INFO] testing moto-rt-0.15.0 against 1.91.0 for beta-1.92-2
[INFO] extracting crate moto-rt 0.15.0 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate moto-rt 0.15.0
[INFO] finished tweaking crates.io crate moto-rt 0.15.0
[INFO] tweaked toml for crates.io crate moto-rt 0.15.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate moto-rt 0.15.0 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] crate crates.io crate moto-rt 0.15.0 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" "+1.91.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rustc-std-workspace-core v1.0.1
[INFO] [stderr]   Downloaded rustc-std-workspace-alloc v1.0.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 63b3bf197476ad15a19d247e952fb31d01ac1d2fb2198cb38e4153cba2c25cc2
[INFO] running `Command { std: "docker" "start" "-a" "63b3bf197476ad15a19d247e952fb31d01ac1d2fb2198cb38e4153cba2c25cc2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "63b3bf197476ad15a19d247e952fb31d01ac1d2fb2198cb38e4153cba2c25cc2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "63b3bf197476ad15a19d247e952fb31d01ac1d2fb2198cb38e4153cba2c25cc2", kill_on_drop: false }`
[INFO] [stdout] 63b3bf197476ad15a19d247e952fb31d01ac1d2fb2198cb38e4153cba2c25cc2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 83cad61c4d4f0dad40e26c42d3752fc08da3cf904d2d84e13c5974bffcad05eb
[INFO] running `Command { std: "docker" "start" "-a" "83cad61c4d4f0dad40e26c42d3752fc08da3cf904d2d84e13c5974bffcad05eb", kill_on_drop: false }`
[INFO] [stderr]    Compiling moto-rt v0.15.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:27:1
[INFO] [stdout]    |
[INFO] [stdout] 27 | #![feature(linkage)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `moto-rt` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "83cad61c4d4f0dad40e26c42d3752fc08da3cf904d2d84e13c5974bffcad05eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "83cad61c4d4f0dad40e26c42d3752fc08da3cf904d2d84e13c5974bffcad05eb", kill_on_drop: false }`
[INFO] [stdout] 83cad61c4d4f0dad40e26c42d3752fc08da3cf904d2d84e13c5974bffcad05eb
