[INFO] cloning repository https://github.com/scottschroeder/storyestimate
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/scottschroeder/storyestimate" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fscottschroeder%2Fstoryestimate", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fscottschroeder%2Fstoryestimate'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6f44b969691d4d74c3b1d3a667659250eb45d862
[INFO] testing scottschroeder/storyestimate against 1.49.0 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fscottschroeder%2Fstoryestimate" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/scottschroeder/storyestimate on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/scottschroeder/storyestimate
[INFO] finished tweaking git repo https://github.com/scottschroeder/storyestimate
[INFO] tweaked toml for git repo https://github.com/scottschroeder/storyestimate written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/scottschroeder/storyestimate already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "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] 2ee03222d38f4ad9e1e31392831b8c6c629eddf5fcc9a1fe3c436e88cde42b85
[INFO] running `Command { std: "docker" "start" "-a" "2ee03222d38f4ad9e1e31392831b8c6c629eddf5fcc9a1fe3c436e88cde42b85", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2ee03222d38f4ad9e1e31392831b8c6c629eddf5fcc9a1fe3c436e88cde42b85", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2ee03222d38f4ad9e1e31392831b8c6c629eddf5fcc9a1fe3c436e88cde42b85", kill_on_drop: false }`
[INFO] [stdout] 2ee03222d38f4ad9e1e31392831b8c6c629eddf5fcc9a1fe3c436e88cde42b85
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", 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] c5e685113a43132fb72821df3f42cf5a0c74c4bf069c22f484b6cd4d656302ab
[INFO] running `Command { std: "docker" "start" "-a" "c5e685113a43132fb72821df3f42cf5a0c74c4bf069c22f484b6cd4d656302ab", kill_on_drop: false }`
[INFO] [stderr]    Compiling matches v0.1.4
[INFO] [stderr]    Compiling unicode-normalization v0.1.4
[INFO] [stderr]    Compiling version_check v0.1.0
[INFO] [stderr]    Compiling gcc v0.3.43
[INFO] [stderr]    Compiling httparse v1.2.1
[INFO] [stderr]    Compiling regex-syntax v0.4.0
[INFO] [stderr]    Compiling state v0.2.0
[INFO] [stderr]    Compiling backtrace v0.3.0
[INFO] [stderr]    Compiling dtoa v0.4.1
[INFO] [stderr]    Compiling redis v0.8.0
[INFO] [stderr]    Compiling itoa v0.3.1
[INFO] [stderr]    Compiling serde v0.9.11
[INFO] [stderr]    Compiling num-traits v0.1.37
[INFO] [stderr]    Compiling rustc-demangle v0.1.4
[INFO] [stderr]    Compiling cfg-if v0.1.0
[INFO] [stderr]    Compiling quick-error v1.1.0
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/state-0.2.0/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(const_fn)]
[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 `state`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "c5e685113a43132fb72821df3f42cf5a0c74c4bf069c22f484b6cd4d656302ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c5e685113a43132fb72821df3f42cf5a0c74c4bf069c22f484b6cd4d656302ab", kill_on_drop: false }`
[INFO] [stdout] c5e685113a43132fb72821df3f42cf5a0c74c4bf069c22f484b6cd4d656302ab