[INFO] fetching crate domafic 0.2.0...
[INFO] testing domafic-0.2.0 against beta-2021-01-01 for beta-1.50-1
[INFO] extracting crate domafic 0.2.0 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate domafic 0.2.0 on toolchain beta-2021-01-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate domafic 0.2.0
[INFO] finished tweaking crates.io crate domafic 0.2.0
[INFO] tweaked toml for crates.io crate domafic 0.2.0 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded marksman_escape v0.1.2
[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" "+beta-2021-01-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 09b53d10617c020c02e8f3627eeeed9c815f192058f4b439625860892860b550
[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" "09b53d10617c020c02e8f3627eeeed9c815f192058f4b439625860892860b550", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "09b53d10617c020c02e8f3627eeeed9c815f192058f4b439625860892860b550", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "09b53d10617c020c02e8f3627eeeed9c815f192058f4b439625860892860b550", kill_on_drop: false }`
[INFO] [stdout] 09b53d10617c020c02e8f3627eeeed9c815f192058f4b439625860892860b550
[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" "+beta-2021-01-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1dcaa256515e02a1b45edfc618b91948a59ebcbd2b0a446750494cad134d174e
[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" "1dcaa256515e02a1b45edfc618b91948a59ebcbd2b0a446750494cad134d174e", kill_on_drop: false }`
[INFO] [stderr]    Compiling either_n v0.2.0
[INFO] [stderr]    Compiling marksman_escape v0.1.2
[INFO] [stderr]    Compiling domafic v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 11.07s
[INFO] running `Command { std: "docker" "inspect" "1dcaa256515e02a1b45edfc618b91948a59ebcbd2b0a446750494cad134d174e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1dcaa256515e02a1b45edfc618b91948a59ebcbd2b0a446750494cad134d174e", kill_on_drop: false }`
[INFO] [stdout] 1dcaa256515e02a1b45edfc618b91948a59ebcbd2b0a446750494cad134d174e
[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" "+beta-2021-01-01" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 24e8f78b103e8bd95efbb839aee6e2843664150f2391565348b7b31facdb857b
[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" "24e8f78b103e8bd95efbb839aee6e2843664150f2391565348b7b31facdb857b", kill_on_drop: false }`
[INFO] [stderr]    Compiling domafic v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]    --> src/lib.rs:126:19
[INFO] [stdout]     |
[INFO] [stdout] 126 | #![cfg_attr(test, feature(conservative_impl_trait))]
[INFO] [stdout]     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]    --> src/lib.rs:315:13
[INFO] [stdout]     |
[INFO] [stdout] 315 |           div((
[INFO] [stdout]     |  _____________^
[INFO] [stdout] 316 | |             table((
[INFO] [stdout] 317 | |                 if include_rows {
[INFO] [stdout] 318 | |                     Either2::One((
[INFO] [stdout] ...   |
[INFO] [stdout] 325 | |             ))
[INFO] [stdout] 326 | |         ))
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 315 |         div(table((
[INFO] [stdout] 316 |                 if include_rows {
[INFO] [stdout] 317 |                     Either2::One((
[INFO] [stdout] 318 |                         tr("a"),
[INFO] [stdout] 319 |                         tr("b"),
[INFO] [stdout] 320 |                     ))
[INFO] [stdout]   ...
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]    --> src/lib.rs:316:19
[INFO] [stdout]     |
[INFO] [stdout] 316 |               table((
[INFO] [stdout]     |  ___________________^
[INFO] [stdout] 317 | |                 if include_rows {
[INFO] [stdout] 318 | |                     Either2::One((
[INFO] [stdout] 319 | |                         tr("a"),
[INFO] [stdout] ...   |
[INFO] [stdout] 324 | |                 }
[INFO] [stdout] 325 | |             ))
[INFO] [stdout]     | |_____________^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 316 |             table(if include_rows {
[INFO] [stdout] 317 |                     Either2::One((
[INFO] [stdout] 318 |                         tr("a"),
[INFO] [stdout] 319 |                         tr("b"),
[INFO] [stdout] 320 |                     ))
[INFO] [stdout] 321 |                 } else {
[INFO] [stdout]   ...
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 2 warnings 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 `domafic`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "24e8f78b103e8bd95efbb839aee6e2843664150f2391565348b7b31facdb857b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "24e8f78b103e8bd95efbb839aee6e2843664150f2391565348b7b31facdb857b", kill_on_drop: false }`
[INFO] [stdout] 24e8f78b103e8bd95efbb839aee6e2843664150f2391565348b7b31facdb857b