[INFO] fetching crate domafic 0.2.0...
[INFO] testing domafic-0.2.0 against 1.49.0 for beta-1.50-1
[INFO] extracting crate domafic 0.2.0 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate domafic 0.2.0 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 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-13/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[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-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] aa28b902ad10f7c6ebfea93d01d5e5c9f8ed2ebf6a582741703cfc3762328947
[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" "aa28b902ad10f7c6ebfea93d01d5e5c9f8ed2ebf6a582741703cfc3762328947", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "aa28b902ad10f7c6ebfea93d01d5e5c9f8ed2ebf6a582741703cfc3762328947", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aa28b902ad10f7c6ebfea93d01d5e5c9f8ed2ebf6a582741703cfc3762328947", kill_on_drop: false }`
[INFO] [stdout] aa28b902ad10f7c6ebfea93d01d5e5c9f8ed2ebf6a582741703cfc3762328947
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] 22284245d5df58225af0525c5df047125e7822cb185b621e758a286071067d43
[INFO] running `Command { std: "docker" "start" "-a" "22284245d5df58225af0525c5df047125e7822cb185b621e758a286071067d43", kill_on_drop: false }`
[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 10.17s
[INFO] running `Command { std: "docker" "inspect" "22284245d5df58225af0525c5df047125e7822cb185b621e758a286071067d43", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "22284245d5df58225af0525c5df047125e7822cb185b621e758a286071067d43", kill_on_drop: false }`
[INFO] [stdout] 22284245d5df58225af0525c5df047125e7822cb185b621e758a286071067d43
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 08f82e3c28bf5540c177985f241e7fb242bd90f17ec40116b7c408e1b2a91050
[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" "08f82e3c28bf5540c177985f241e7fb242bd90f17ec40116b7c408e1b2a91050", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling domafic v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable 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" "08f82e3c28bf5540c177985f241e7fb242bd90f17ec40116b7c408e1b2a91050", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "08f82e3c28bf5540c177985f241e7fb242bd90f17ec40116b7c408e1b2a91050", kill_on_drop: false }`
[INFO] [stdout] 08f82e3c28bf5540c177985f241e7fb242bd90f17ec40116b7c408e1b2a91050