[INFO] cloning repository https://github.com/msiemens/one2html
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/msiemens/one2html" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmsiemens%2Fone2html", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmsiemens%2Fone2html'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 734bc3f251f908fce62e0721135735a1073f459d
[INFO] testing msiemens/one2html against 1.49.0 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmsiemens%2Fone2html" "/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/msiemens/one2html 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/msiemens/one2html
[INFO] finished tweaking git repo https://github.com/msiemens/one2html
[INFO] tweaked toml for git repo https://github.com/msiemens/one2html written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/msiemens/one2html 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] [stdout] cad00331994f98a3384b6c973101ca39a2d4940ee20212f9ee1e44ddb2bfcd2b
[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" "cad00331994f98a3384b6c973101ca39a2d4940ee20212f9ee1e44ddb2bfcd2b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cad00331994f98a3384b6c973101ca39a2d4940ee20212f9ee1e44ddb2bfcd2b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cad00331994f98a3384b6c973101ca39a2d4940ee20212f9ee1e44ddb2bfcd2b", kill_on_drop: false }`
[INFO] [stdout] cad00331994f98a3384b6c973101ca39a2d4940ee20212f9ee1e44ddb2bfcd2b
[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] afeb3ffdd85c5c4ed9b62c114d4bed9f6a2a61a432eedd419e466f2a81eece81
[INFO] running `Command { std: "docker" "start" "-a" "afeb3ffdd85c5c4ed9b62c114d4bed9f6a2a61a432eedd419e466f2a81eece81", kill_on_drop: false }`
[INFO] [stderr]    Compiling askama_escape v0.10.1
[INFO] [stderr]    Compiling eyre v0.6.2
[INFO] [stderr]    Compiling number_prefix v0.3.0
[INFO] [stderr]    Compiling paste v1.0.2
[INFO] [stderr]    Compiling widestring v0.4.3
[INFO] [stderr]    Compiling phf_shared v0.8.0
[INFO] [stderr]    Compiling tracing-subscriber v0.2.15
[INFO] [stderr]    Compiling getrandom v0.1.15
[INFO] [stderr]    Compiling nom v5.1.2
[INFO] [stderr]    Compiling terminal_size v0.1.13
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling palette_derive v0.5.0
[INFO] [stderr]    Compiling approx v0.3.2
[INFO] [stderr]    Compiling enum-primitive-derive v0.2.1
[INFO] [stderr]    Compiling tracing v0.1.21
[INFO] [stderr]    Compiling backtrace v0.3.54
[INFO] [stderr]    Compiling sanitize-filename v0.3.0
[INFO] [stderr]    Compiling console v0.13.0
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling phf v0.8.0
[INFO] [stderr]    Compiling rand_pcg v0.2.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling structopt-derive v0.4.13
[INFO] [stderr]    Compiling tracing-error v0.1.2
[INFO] [stderr]    Compiling indicatif v0.15.0
[INFO] [stderr]    Compiling color-spantrace v0.1.4
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling color-eyre v0.5.7
[INFO] [stderr]    Compiling onenote_parser v0.2.1
[INFO] [stderr]    Compiling askama_shared v0.10.4
[INFO] [stderr]    Compiling phf_generator v0.8.0
[INFO] [stderr]    Compiling phf_codegen v0.8.0
[INFO] [stderr]    Compiling palette v0.5.0
[INFO] [stderr]    Compiling structopt v0.3.20
[INFO] [stderr]    Compiling happylog v0.1.0
[INFO] [stderr]    Compiling askama_derive v0.10.3
[INFO] [stderr]    Compiling askama v0.10.3
[INFO] [stderr]    Compiling one2html v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:1:36
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![cfg_attr(feature = "backtrace", feature(backtrace))]
[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 `one2html`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "afeb3ffdd85c5c4ed9b62c114d4bed9f6a2a61a432eedd419e466f2a81eece81", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "afeb3ffdd85c5c4ed9b62c114d4bed9f6a2a61a432eedd419e466f2a81eece81", kill_on_drop: false }`
[INFO] [stdout] afeb3ffdd85c5c4ed9b62c114d4bed9f6a2a61a432eedd419e466f2a81eece81