[INFO] fetching crate syndicate-server 0.51.0-rc.4...
[INFO] testing syndicate-server-0.51.0-rc.4 against 1.99.0-beta.8 for beta-1.100-2
[INFO] extracting crate syndicate-server 0.51.0-rc.4 into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate syndicate-server 0.51.0-rc.4
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate syndicate-server 0.51.0-rc.4
[INFO] tweaked toml for crates.io crate syndicate-server 0.51.0-rc.4 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate syndicate-server 0.51.0-rc.4 on toolchain 1.99.0-beta.8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.99.0-beta.8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate syndicate-server 0.51.0-rc.4 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" "+1.99.0-beta.8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded pin-project-internal v1.1.11
[INFO] [stderr]   Downloaded syndicate-schema-plugin v0.12.0-rc.3
[INFO] [stderr]   Downloaded preserves-schema v6.0.0-rc.10
[INFO] [stderr]   Downloaded pin-project v1.1.11
[INFO] [stderr]   Downloaded dtoa v0.4.8
[INFO] [stderr]   Downloaded fsevent-sys v2.0.1
[INFO] [stderr]   Downloaded noise-rust-crypto v0.5.0
[INFO] [stderr]   Downloaded ghash v0.4.4
[INFO] [stderr]   Downloaded hyper-tungstenite v0.11.1
[INFO] [stderr]   Downloaded inotify-sys v0.1.5
[INFO] [stderr]   Downloaded libredox v0.1.16
[INFO] [stderr]   Downloaded fsevent v0.4.0
[INFO] [stderr]   Downloaded noise-protocol v0.1.4
[INFO] [stderr]   Downloaded redox_syscall v0.7.4
[INFO] [stderr]   Downloaded poly1305 v0.7.2
[INFO] [stderr]   Downloaded chacha20 v0.8.2
[INFO] [stderr]   Downloaded syndicate-macros v0.35.0-rc.6
[INFO] [stderr]   Downloaded inotify v0.7.1
[INFO] [stderr]   Downloaded data-encoding v2.11.0
[INFO] [stderr]   Downloaded notify v4.0.18
[INFO] [stderr]   Downloaded structopt v0.3.26
[INFO] [stderr]   Downloaded preserves v5.0.0-rc.10
[INFO] [stderr]   Downloaded chacha20poly1305 v0.9.1
[INFO] [stderr]   Downloaded x25519-dalek v1.2.0
[INFO] [stderr]   Downloaded syndicate v0.44.0-rc.8
[INFO] [stderr]   Downloaded unicode-segmentation v1.13.2
[INFO] [stderr]   Downloaded aes-gcm v0.9.4
[INFO] [stderr]   Downloaded tokio v1.52.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3111399a4047eeb3a02b7a90e478d715f38a8c6669b5c4b49d30a17385265909" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 9aeee424953361c53ccf05972f83242bb6741459ceb2f7cf7315e68895f2556b
[INFO] running `Command { std: "docker" "start" "9aeee424953361c53ccf05972f83242bb6741459ceb2f7cf7315e68895f2556b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9aeee424953361c53ccf05972f83242bb6741459ceb2f7cf7315e68895f2556b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "9aeee424953361c53ccf05972f83242bb6741459ceb2f7cf7315e68895f2556b" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9aeee424953361c53ccf05972f83242bb6741459ceb2f7cf7315e68895f2556b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "9aeee424953361c53ccf05972f83242bb6741459ceb2f7cf7315e68895f2556b" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
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[INFO] [stderr]    Compiling tracing-subscriber v0.3.23
[INFO] [stderr]    Compiling x25519-dalek v1.2.0
[INFO] [stderr]    Compiling noise-rust-crypto v0.5.0
[INFO] [stderr]    Compiling tinystr v0.8.3
[INFO] [stderr]    Compiling potential_utf v0.1.5
[INFO] [stderr]    Compiling icu_collections v2.2.0
[INFO] [stderr]    Compiling icu_locale_core v2.2.0
[INFO] [stderr]    Compiling icu_provider v2.2.0
[INFO] [stderr]    Compiling icu_properties v2.2.0
[INFO] [stderr]    Compiling icu_normalizer v2.2.0
[INFO] [stderr]    Compiling futures-executor v0.3.32
[INFO] [stderr]    Compiling futures v0.3.32
[INFO] [stderr]    Compiling syndicate-schema-plugin v0.12.0-rc.3
[INFO] [stderr]    Compiling idna_adapter v1.2.1
[INFO] [stderr]    Compiling idna v1.1.0
[INFO] [stderr]    Compiling tokio-util v0.6.10
[INFO] [stderr]    Compiling url v2.5.8
[INFO] [stderr]    Compiling tungstenite v0.20.1
[INFO] [stderr]    Compiling hyper v0.14.32
[INFO] [stderr]    Compiling tokio-tungstenite v0.20.1
[INFO] [stderr]    Compiling tokio-stream v0.1.18
[INFO] [stderr]    Compiling hyper-tungstenite v0.11.1
[INFO] [stderr]    Compiling syndicate v0.44.0-rc.8
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/syndicate-0.44.0-rc.8/src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(min_specialization)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/syndicate-0.44.0-rc.8/src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(min_specialization)]
[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 `syndicate` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `syndicate` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "9aeee424953361c53ccf05972f83242bb6741459ceb2f7cf7315e68895f2556b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9aeee424953361c53ccf05972f83242bb6741459ceb2f7cf7315e68895f2556b", kill_on_drop: false }`
[INFO] [stdout] 9aeee424953361c53ccf05972f83242bb6741459ceb2f7cf7315e68895f2556b
