[INFO] cloning repository https://github.com/peng1999/trans-csv
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/peng1999/trans-csv" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpeng1999%2Ftrans-csv", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpeng1999%2Ftrans-csv'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9f13508ec45d89bae4c674d02f4b1e77e1be6128
[INFO] testing peng1999/trans-csv against 1.49.0 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpeng1999%2Ftrans-csv" "/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/peng1999/trans-csv 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/peng1999/trans-csv
[INFO] finished tweaking git repo https://github.com/peng1999/trans-csv
[INFO] tweaked toml for git repo https://github.com/peng1999/trans-csv written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/peng1999/trans-csv 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] [stderr]     Blocking waiting for file lock on package cache
[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" "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] d348de3dd9a13a68a1ec1bdd4a2a93f036eaa591fa9b225af8a85c78a099cc19
[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" "d348de3dd9a13a68a1ec1bdd4a2a93f036eaa591fa9b225af8a85c78a099cc19", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d348de3dd9a13a68a1ec1bdd4a2a93f036eaa591fa9b225af8a85c78a099cc19", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d348de3dd9a13a68a1ec1bdd4a2a93f036eaa591fa9b225af8a85c78a099cc19", kill_on_drop: false }`
[INFO] [stdout] d348de3dd9a13a68a1ec1bdd4a2a93f036eaa591fa9b225af8a85c78a099cc19
[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" "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] 9a75a12ec1f19713ec0588579e635d0b5a2e6a58a36e3fd1637e07b7b84aacbb
[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" "9a75a12ec1f19713ec0588579e635d0b5a2e6a58a36e3fd1637e07b7b84aacbb", kill_on_drop: false }`
[INFO] [stderr]    Compiling bindgen v0.35.0
[INFO] [stderr]    Compiling memchr v1.0.2
[INFO] [stderr]    Compiling which v1.0.5
[INFO] [stderr]    Compiling libloading v0.5.0
[INFO] [stderr]    Compiling clang-sys v0.22.0
[INFO] [stderr]    Compiling regex-syntax v0.5.3
[INFO] [stderr]    Compiling nom v3.2.1
[INFO] [stderr]    Compiling cexpr v0.2.3
[INFO] [stderr]    Compiling regex v0.2.10
[INFO] [stderr]    Compiling env_logger v0.5.6
[INFO] [stderr]    Compiling trans-csv v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> build.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(nll)]
[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 `trans-csv`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "9a75a12ec1f19713ec0588579e635d0b5a2e6a58a36e3fd1637e07b7b84aacbb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9a75a12ec1f19713ec0588579e635d0b5a2e6a58a36e3fd1637e07b7b84aacbb", kill_on_drop: false }`
[INFO] [stdout] 9a75a12ec1f19713ec0588579e635d0b5a2e6a58a36e3fd1637e07b7b84aacbb