[INFO] crate domafic 0.2.0 is already in cache
[INFO] testing domafic-0.2.0 against 1.44.0 for beta-1.45-1
[INFO] extracting crate domafic 0.2.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate domafic 0.2.0 on toolchain 1.44.0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[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-4/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.44.0" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 0556cca8dd370be1328117855f5679d361fae0ba9e3e9fb9341a792af4b15496
[INFO] running `"docker" "start" "-a" "0556cca8dd370be1328117855f5679d361fae0ba9e3e9fb9341a792af4b15496"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling marksman_escape v0.1.2
[INFO] [stderr]    Compiling either_n v0.2.0
[INFO] [stderr]    Compiling domafic v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 11.64s
[INFO] running `"docker" "inspect" "0556cca8dd370be1328117855f5679d361fae0ba9e3e9fb9341a792af4b15496"`
[INFO] running `"docker" "rm" "-f" "0556cca8dd370be1328117855f5679d361fae0ba9e3e9fb9341a792af4b15496"`
[INFO] [stdout] 0556cca8dd370be1328117855f5679d361fae0ba9e3e9fb9341a792af4b15496
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.44.0" "test" "--frozen" "--no-run"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 57390001ea83995e873462505835c2c78884eb6f4f04a6334377bdefc37c0c9d
[INFO] running `"docker" "start" "-a" "57390001ea83995e873462505835c2c78884eb6f4f04a6334377bdefc37c0c9d"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling domafic v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]    --> src/lib.rs:126:19
[INFO] [stderr]     |
[INFO] [stderr] 126 | #![cfg_attr(test, feature(conservative_impl_trait))]
[INFO] [stderr]     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]    --> src/lib.rs:315:13
[INFO] [stderr]     |
[INFO] [stderr] 315 |           div((
[INFO] [stderr]     |  _____________^
[INFO] [stderr] 316 | |             table((
[INFO] [stderr] 317 | |                 if include_rows {
[INFO] [stderr] 318 | |                     Either2::One((
[INFO] [stderr] ...   |
[INFO] [stderr] 325 | |             ))
[INFO] [stderr] 326 | |         ))
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 315 |         div(
[INFO] [stderr] 316 |             table((
[INFO] [stderr] 317 |                 if include_rows {
[INFO] [stderr] 318 |                     Either2::One((
[INFO] [stderr] 319 |                         tr("a"),
[INFO] [stderr] 320 |                         tr("b"),
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]    --> src/lib.rs:316:19
[INFO] [stderr]     |
[INFO] [stderr] 316 |               table((
[INFO] [stderr]     |  ___________________^
[INFO] [stderr] 317 | |                 if include_rows {
[INFO] [stderr] 318 | |                     Either2::One((
[INFO] [stderr] 319 | |                         tr("a"),
[INFO] [stderr] ...   |
[INFO] [stderr] 324 | |                 }
[INFO] [stderr] 325 | |             ))
[INFO] [stderr]     | |_____________^
[INFO] [stderr]     |
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 316 |             table(
[INFO] [stderr] 317 |                 if include_rows {
[INFO] [stderr] 318 |                     Either2::One((
[INFO] [stderr] 319 |                         tr("a"),
[INFO] [stderr] 320 |                         tr("b"),
[INFO] [stderr] 321 |                     ))
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error; 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: could not compile `domafic`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "57390001ea83995e873462505835c2c78884eb6f4f04a6334377bdefc37c0c9d"`
[INFO] running `"docker" "rm" "-f" "57390001ea83995e873462505835c2c78884eb6f4f04a6334377bdefc37c0c9d"`
[INFO] [stdout] 57390001ea83995e873462505835c2c78884eb6f4f04a6334377bdefc37c0c9d