[INFO] cloning repository https://github.com/lonnng/lua-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/lonnng/lua-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flonnng%2Flua-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flonnng%2Flua-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] cc46902ab63e6c37a6040ec054cd7c92a08652be
[INFO] testing lonnng/lua-rs against beta-2020-07-24 for beta-1.46-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flonnng%2Flua-rs" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/lonnng/lua-rs on toolchain beta-2020-07-24
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/lonnng/lua-rs
[INFO] finished tweaking git repo https://github.com/lonnng/lua-rs
[INFO] tweaked toml for git repo https://github.com/lonnng/lua-rs written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/lonnng/lua-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "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] 8aa767ba330b5abbc7f8fab5f7ad7d2095089bca975b6baada3d692c29e63cf4
[INFO] running `Command { std: "docker" "start" "-a" "8aa767ba330b5abbc7f8fab5f7ad7d2095089bca975b6baada3d692c29e63cf4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8aa767ba330b5abbc7f8fab5f7ad7d2095089bca975b6baada3d692c29e63cf4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8aa767ba330b5abbc7f8fab5f7ad7d2095089bca975b6baada3d692c29e63cf4", kill_on_drop: false }`
[INFO] [stdout] 8aa767ba330b5abbc7f8fab5f7ad7d2095089bca975b6baada3d692c29e63cf4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "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] e2c6bc956847884c9525f35a498bac972c86f46b32629927120c2fc82448ffa3
[INFO] running `Command { std: "docker" "start" "-a" "e2c6bc956847884c9525f35a498bac972c86f46b32629927120c2fc82448ffa3", kill_on_drop: false }`
[INFO] [stderr]    Compiling bytes v0.5.4
[INFO] [stderr]    Compiling lua v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0277]: the trait bound `u8: bytes::Buf` is not satisfied
[INFO] [stdout]    --> src/scanner.rs:257:25
[INFO] [stdout]     |
[INFO] [stdout] 257 |         self.buffer.put(c as u8)
[INFO] [stdout]     |                         ^^^^^^^ the trait `bytes::Buf` is not implemented for `u8`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/scanner.rs:352:9
[INFO] [stdout]     |
[INFO] [stdout] 314 | /         loop {
[INFO] [stdout] 315 | |             match self.current {
[INFO] [stdout] 316 | |                 EOF => {
[INFO] [stdout] 317 | |                     if is_comment {
[INFO] [stdout] ...   |
[INFO] [stdout] 350 | |             }
[INFO] [stdout] 351 | |         }
[INFO] [stdout]     | |_________- any code following this expression is unreachable
[INFO] [stdout] 352 |           unreachable!()
[INFO] [stdout]     |           ^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `lua`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "e2c6bc956847884c9525f35a498bac972c86f46b32629927120c2fc82448ffa3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e2c6bc956847884c9525f35a498bac972c86f46b32629927120c2fc82448ffa3", kill_on_drop: false }`
[INFO] [stdout] e2c6bc956847884c9525f35a498bac972c86f46b32629927120c2fc82448ffa3