[INFO] cloning repository https://github.com/mlafroce/barbaos
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mlafroce/barbaos" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmlafroce%2Fbarbaos", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmlafroce%2Fbarbaos'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0622d14772585101f731e5847acbf14922833913
[INFO] testing mlafroce/barbaos against 1.49.0 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmlafroce%2Fbarbaos" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mlafroce/barbaos 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] removed /workspace/builds/worker-0/source/.cargo/config
[INFO] started tweaking git repo https://github.com/mlafroce/barbaos
[INFO] finished tweaking git repo https://github.com/mlafroce/barbaos
[INFO] tweaked toml for git repo https://github.com/mlafroce/barbaos written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/mlafroce/barbaos 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-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] 0eae8272866119610f9f4d93de2728b2e306d37cea4f899d9a1373542e0ae126
[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" "0eae8272866119610f9f4d93de2728b2e306d37cea4f899d9a1373542e0ae126", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0eae8272866119610f9f4d93de2728b2e306d37cea4f899d9a1373542e0ae126", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0eae8272866119610f9f4d93de2728b2e306d37cea4f899d9a1373542e0ae126", kill_on_drop: false }`
[INFO] [stdout] 0eae8272866119610f9f4d93de2728b2e306d37cea4f899d9a1373542e0ae126
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] ac8b348524aa13e1d39601ff86f8905298400f72aea5e5ada199c2e9c84607c5
[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" "ac8b348524aa13e1d39601ff86f8905298400f72aea5e5ada199c2e9c84607c5", kill_on_drop: false }`
[INFO] [stderr]    Compiling barbaos v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/main.rs:10:1
[INFO] [stdout]    |
[INFO] [stdout] 10 | / #![feature(
[INFO] [stdout] 11 | |     global_asm,
[INFO] [stdout] 12 | |     llvm_asm,
[INFO] [stdout] 13 | |     panic_info_message,
[INFO] [stdout] 14 | |     custom_test_frameworks)]
[INFO] [stdout]    | |____________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::MapTable`
[INFO] [stdout]  --> src/system/syscall.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::MapTable;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: language item required, but not found: `eh_personality`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `barbaos`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "ac8b348524aa13e1d39601ff86f8905298400f72aea5e5ada199c2e9c84607c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ac8b348524aa13e1d39601ff86f8905298400f72aea5e5ada199c2e9c84607c5", kill_on_drop: false }`
[INFO] [stdout] ac8b348524aa13e1d39601ff86f8905298400f72aea5e5ada199c2e9c84607c5