[INFO] fetching crate phlow-server 2.0.1...
[INFO] testing phlow-server-2.0.1 against 1.90.0 for beta-1.91-3
[INFO] extracting crate phlow-server 2.0.1 into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate phlow-server 2.0.1
[INFO] finished tweaking crates.io crate phlow-server 2.0.1
[INFO] tweaked toml for crates.io crate phlow-server 2.0.1 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate phlow-server 2.0.1 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 phlow-server 2.0.1 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]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded blob-uuid v0.5.0
[INFO] [stderr]   Downloaded phlow-derive v2.0.0
[INFO] [stderr]   Downloaded unique_id v0.1.5
[INFO] [stderr]   Downloaded phlow-extensions v2.0.0
[INFO] [stderr]   Downloaded typetag-impl v0.2.16
[INFO] [stderr]   Downloaded phlow v2.0.0
[INFO] [stderr]   Downloaded async-trait v0.1.79
[INFO] [stderr]   Downloaded erased-serde v0.4.4
[INFO] [stderr]   Downloaded base64 v0.22.0
[INFO] [stderr]   Downloaded typetag v0.2.16
[INFO] [stderr]   Downloaded warp v0.3.6
[INFO] [stderr]   Downloaded h2 v0.3.25
[INFO] [stderr]   Downloaded serde_json v1.0.115
[INFO] [stderr]   Downloaded syn v2.0.57
[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] b3be8446280d099f0c43ab13d62af294c4e5a8997eafccf2e864d9494f77d0ab
[INFO] running `Command { std: "docker" "start" "-a" "b3be8446280d099f0c43ab13d62af294c4e5a8997eafccf2e864d9494f77d0ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b3be8446280d099f0c43ab13d62af294c4e5a8997eafccf2e864d9494f77d0ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b3be8446280d099f0c43ab13d62af294c4e5a8997eafccf2e864d9494f77d0ab", kill_on_drop: false }`
[INFO] [stdout] b3be8446280d099f0c43ab13d62af294c4e5a8997eafccf2e864d9494f77d0ab
[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] 2510007708b953a00eea98881368b9ffcf3653708a270fd5a18cdbd2201c8147
[INFO] running `Command { std: "docker" "start" "-a" "2510007708b953a00eea98881368b9ffcf3653708a270fd5a18cdbd2201c8147", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.79
[INFO] [stderr]    Compiling lock_api v0.4.11
[INFO] [stderr]    Compiling getrandom v0.2.12
[INFO] [stderr]    Compiling parking_lot_core v0.9.9
[INFO] [stderr]    Compiling serde v1.0.197
[INFO] [stderr]    Compiling thiserror v1.0.58
[INFO] [stderr]    Compiling tracing v0.1.40
[INFO] [stderr]    Compiling sha1 v0.10.6
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling uuid v1.8.0
[INFO] [stderr]    Compiling async-trait v0.1.79
[INFO] [stderr]    Compiling indexmap v2.2.6
[INFO] [stderr]    Compiling mime_guess v2.0.4
[INFO] [stderr]    Compiling multer v2.1.0
[INFO] [stderr]    Compiling parking_lot v0.12.1
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling serde_json v1.0.115
[INFO] [stderr]    Compiling headers-core v0.2.0
[INFO] [stderr]    Compiling spin v0.9.8
[INFO] [stderr]    Compiling blob-uuid v0.5.0
[INFO] [stderr]    Compiling base64 v0.22.0
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling unique_id v0.1.5
[INFO] [stderr]    Compiling headers v0.3.9
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling rust-format v0.3.4
[INFO] [stderr]    Compiling syn v2.0.57
[INFO] [stderr]    Compiling futures-macro v0.3.30
[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stderr]    Compiling tokio-macros v2.2.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.58
[INFO] [stderr]    Compiling typetag-impl v0.2.16
[INFO] [stderr]    Compiling phlow-derive v2.0.0
[INFO] [stderr]    Compiling pin-project-internal v1.1.5
[INFO] [stderr]    Compiling serde_repr v0.1.18
[INFO] [stderr]    Compiling tokio v1.37.0
[INFO] [stderr]    Compiling futures-util v0.3.30
[INFO] [stderr]    Compiling pin-project v1.1.5
[INFO] [stderr]    Compiling tungstenite v0.20.1
[INFO] [stderr]    Compiling futures-executor v0.3.30
[INFO] [stderr]    Compiling erased-serde v0.4.4
[INFO] [stderr]    Compiling serde_urlencoded v0.7.1
[INFO] [stderr]    Compiling tokio-util v0.7.10
[INFO] [stderr]    Compiling tokio-tungstenite v0.20.1
[INFO] [stderr]    Compiling tokio-stream v0.1.15
[INFO] [stderr]    Compiling typetag v0.2.16
[INFO] [stderr]    Compiling phlow v2.0.0
[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/phlow-2.0.0/src/lib.rs:4:35
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![cfg_attr(feature = "printing", feature(specialization))]
[INFO] [stdout]   |                                   ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling h2 v0.3.25
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `phlow` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "2510007708b953a00eea98881368b9ffcf3653708a270fd5a18cdbd2201c8147", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2510007708b953a00eea98881368b9ffcf3653708a270fd5a18cdbd2201c8147", kill_on_drop: false }`
[INFO] [stdout] 2510007708b953a00eea98881368b9ffcf3653708a270fd5a18cdbd2201c8147