[INFO] cloning repository https://github.com/BurntSushi/ucd-generate
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/BurntSushi/ucd-generate" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBurntSushi%2Fucd-generate", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBurntSushi%2Fucd-generate'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] aad0bec5ca6a3e1db569471998c34a0d3c720c50
[INFO] checking BurntSushi/ucd-generate against 1.55.0 for beta-1.56-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBurntSushi%2Fucd-generate" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/BurntSushi/ucd-generate on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/BurntSushi/ucd-generate
[INFO] finished tweaking git repo https://github.com/BurntSushi/ucd-generate
[INFO] tweaked toml for git repo https://github.com/BurntSushi/ucd-generate written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/BurntSushi/ucd-generate already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] c8cc20b1f809d84a368fb073d9eb61b306d5c76a8fd982be0366a4d0bd7e53dc
[INFO] running `Command { std: "docker" "start" "-a" "c8cc20b1f809d84a368fb073d9eb61b306d5c76a8fd982be0366a4d0bd7e53dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c8cc20b1f809d84a368fb073d9eb61b306d5c76a8fd982be0366a4d0bd7e53dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c8cc20b1f809d84a368fb073d9eb61b306d5c76a8fd982be0366a4d0bd7e53dc", kill_on_drop: false }`
[INFO] [stdout] c8cc20b1f809d84a368fb073d9eb61b306d5c76a8fd982be0366a4d0bd7e53dc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e5ea7978f27dc6eee2bc8831ad067cdd5a0f10f0f7657396595a10d3af12f254
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "e5ea7978f27dc6eee2bc8831ad067cdd5a0f10f0f7657396595a10d3af12f254", kill_on_drop: false }`
[INFO] [stderr]     Checking regex-syntax v0.6.21
[INFO] [stderr]    Compiling fst v0.4.5
[INFO] [stderr]     Checking ucd-trie v0.1.3 (/opt/rustwide/workdir/ucd-trie)
[INFO] [stderr]     Checking ucd-util v0.1.8 (/opt/rustwide/workdir/ucd-util)
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> ucd-trie/benches/bench.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(test)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ucd-trie` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "e5ea7978f27dc6eee2bc8831ad067cdd5a0f10f0f7657396595a10d3af12f254", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e5ea7978f27dc6eee2bc8831ad067cdd5a0f10f0f7657396595a10d3af12f254", kill_on_drop: false }`
[INFO] [stdout] e5ea7978f27dc6eee2bc8831ad067cdd5a0f10f0f7657396595a10d3af12f254
