[INFO] cloning repository https://github.com/Mancomb/luci
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Mancomb/luci" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMancomb%2Fluci", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMancomb%2Fluci'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d6d822abbf0847bdec8a296ca7d47a61b11baae5
[INFO] testing Mancomb/luci against 1.49.0 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMancomb%2Fluci" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Mancomb/luci 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/Mancomb/luci
[INFO] finished tweaking git repo https://github.com/Mancomb/luci
[INFO] tweaked toml for git repo https://github.com/Mancomb/luci written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/Mancomb/luci 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-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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] [stdout] 4dd0e6f00cb9c9e88ba94cfbf0eab883becd7d121b6f064cff44bca44b91a81e
[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" "4dd0e6f00cb9c9e88ba94cfbf0eab883becd7d121b6f064cff44bca44b91a81e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4dd0e6f00cb9c9e88ba94cfbf0eab883becd7d121b6f064cff44bca44b91a81e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4dd0e6f00cb9c9e88ba94cfbf0eab883becd7d121b6f064cff44bca44b91a81e", kill_on_drop: false }`
[INFO] [stdout] 4dd0e6f00cb9c9e88ba94cfbf0eab883becd7d121b6f064cff44bca44b91a81e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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] [stdout] 7c9dc6e28a540e9419e0e9cc9d002086ebaafbbe67750cadd197e3cc79d388a4
[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" "7c9dc6e28a540e9419e0e9cc9d002086ebaafbbe67750cadd197e3cc79d388a4", kill_on_drop: false }`
[INFO] [stderr]    Compiling lazy_static v1.0.0
[INFO] [stderr]    Compiling mucow v0.1.0
[INFO] [stderr]    Compiling prefetch v0.2.0
[INFO] [stderr]    Compiling rand_core v0.1.0-pre.0
[INFO] [stderr]    Compiling thread-id v3.3.0
[INFO] [stderr]    Compiling log v0.4.1
[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/prefetch-0.2.0/src/lib.rs:18:1
[INFO] [stdout]    |
[INFO] [stdout] 18 | #![feature(link_llvm_intrinsics)]
[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 `prefetch`
[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] [stdout] error[E0425]: cannot find function `unreachable` in module `std::mem`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/lazy_static-1.0.0/src/nightly_lazy.rs:30:35
[INFO] [stdout]    |
[INFO] [stdout] 30 |                 None => std::mem::unreachable(),
[INFO] [stdout]    |                                   ^^^^^^^^^^^ not found in `std::mem`
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing this function
[INFO] [stdout]    |
[INFO] [stdout] 10 | use lazy::std::intrinsics::unreachable;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[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/lazy_static-1.0.0/src/lib.rs:104:32
[INFO] [stdout]     |
[INFO] [stdout] 104 | #![cfg_attr(feature="nightly", feature(unreachable))]
[INFO] [stdout]     |                                ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0425, E0554.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0425`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "7c9dc6e28a540e9419e0e9cc9d002086ebaafbbe67750cadd197e3cc79d388a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7c9dc6e28a540e9419e0e9cc9d002086ebaafbbe67750cadd197e3cc79d388a4", kill_on_drop: false }`
[INFO] [stdout] 7c9dc6e28a540e9419e0e9cc9d002086ebaafbbe67750cadd197e3cc79d388a4