[INFO] fetching crate tomcat 0.1.12...
[INFO] testing tomcat-0.1.12 against 1.90.0 for beta-1.91-3
[INFO] extracting crate tomcat 0.1.12 into /workspace/builds/worker-3-tc1/source
[INFO] started tweaking crates.io crate tomcat 0.1.12
[INFO] finished tweaking crates.io crate tomcat 0.1.12
[INFO] tweaked toml for crates.io crate tomcat 0.1.12 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate tomcat 0.1.12 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 tomcat 0.1.12 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded futures-core v0.3.24
[INFO] [stderr]   Downloaded proc-macro2 v1.0.46
[INFO] [stderr]   Downloaded openssl-sys v0.9.76
[INFO] [stderr]   Downloaded serde v1.0.145
[INFO] [stderr]   Downloaded openssl v0.10.42
[INFO] [stderr]   Downloaded tokio v1.21.2
[INFO] [stderr]   Downloaded serde_json v1.0.86
[INFO] [stderr]   Downloaded libc v0.2.134
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 087cd679dc6cf163a20623aead817948e4d7d4e5a753cf588d8c0de706e32c94
[INFO] running `Command { std: "docker" "start" "-a" "087cd679dc6cf163a20623aead817948e4d7d4e5a753cf588d8c0de706e32c94", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "087cd679dc6cf163a20623aead817948e4d7d4e5a753cf588d8c0de706e32c94", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "087cd679dc6cf163a20623aead817948e4d7d4e5a753cf588d8c0de706e32c94", kill_on_drop: false }`
[INFO] [stdout] 087cd679dc6cf163a20623aead817948e4d7d4e5a753cf588d8c0de706e32c94
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 8693a5fb8ae7ab9c7dc5cd7856aecbd1eb774cc723ba6a5c6eb06bd70ca45603
[INFO] running `Command { std: "docker" "start" "-a" "8693a5fb8ae7ab9c7dc5cd7856aecbd1eb774cc723ba6a5c6eb06bd70ca45603", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.134
[INFO] [stderr]    Compiling proc-macro2 v1.0.46
[INFO] [stderr]    Compiling unicode-ident v1.0.5
[INFO] [stderr]    Compiling syn v1.0.102
[INFO] [stderr]    Compiling once_cell v1.15.0
[INFO] [stderr]    Compiling openssl-sys v0.9.76
[INFO] [stderr]    Compiling futures-core v0.3.24
[INFO] [stderr]    Compiling tokio v1.21.2
[INFO] [stderr]    Compiling itoa v1.0.4
[INFO] [stderr]    Compiling futures-util v0.3.24
[INFO] [stderr]    Compiling openssl v0.10.42
[INFO] [stderr]    Compiling serde v1.0.145
[INFO] [stderr]    Compiling futures-channel v0.3.24
[INFO] [stderr]    Compiling unicode-normalization v0.1.22
[INFO] [stderr]    Compiling serde_json v1.0.86
[INFO] [stderr]    Compiling http v0.2.8
[INFO] [stderr]    Compiling tracing-core v0.1.30
[INFO] [stderr]    Compiling native-tls v0.2.10
[INFO] [stderr]    Compiling idna v0.3.0
[INFO] [stderr]    Compiling tracing v0.1.37
[INFO] [stderr]    Compiling url v2.3.1
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]    Compiling http-body v0.4.5
[INFO] [stderr]    Compiling parking_lot_core v0.9.3
[INFO] [stderr]    Compiling signal-hook-registry v1.4.0
[INFO] [stderr]    Compiling mio v0.8.4
[INFO] [stderr]    Compiling num_cpus v1.13.1
[INFO] [stderr]    Compiling socket2 v0.4.7
[INFO] [stderr]    Compiling parking_lot v0.12.1
[INFO] [stderr]    Compiling serde_urlencoded v0.7.1
[INFO] [stderr]    Compiling tokio-macros v1.8.0
[INFO] [stderr]    Compiling openssl-macros v0.1.0
[INFO] [stderr]    Compiling tokio-util v0.7.4
[INFO] [stderr]    Compiling tokio-native-tls v0.3.0
[INFO] [stderr]    Compiling h2 v0.3.14
[INFO] [stderr]    Compiling hyper v0.14.20
[INFO] [stderr]    Compiling hyper-tls v0.5.0
[INFO] [stderr]    Compiling reqwest v0.11.12
[INFO] [stderr]    Compiling tomcat v0.1.12 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![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/lib.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![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 `tomcat` (lib) due to 1 previous error; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "8693a5fb8ae7ab9c7dc5cd7856aecbd1eb774cc723ba6a5c6eb06bd70ca45603", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8693a5fb8ae7ab9c7dc5cd7856aecbd1eb774cc723ba6a5c6eb06bd70ca45603", kill_on_drop: false }`
[INFO] [stdout] 8693a5fb8ae7ab9c7dc5cd7856aecbd1eb774cc723ba6a5c6eb06bd70ca45603