[INFO] fetching crate tomlenv 0.4.1...
[INFO] testing tomlenv-0.4.1 against beta-2021-01-01 for beta-1.50-1
[INFO] extracting crate tomlenv 0.4.1 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate tomlenv 0.4.1 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 tomlenv 0.4.1
[INFO] finished tweaking crates.io crate tomlenv 0.4.1
[INFO] tweaked toml for crates.io crate tomlenv 0.4.1 written to /workspace/builds/worker-8/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]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] 37331bfe2d9c9053dbc18fe9a2e9cd027ed9d7554ed020a07e186534a109617f
[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" "37331bfe2d9c9053dbc18fe9a2e9cd027ed9d7554ed020a07e186534a109617f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "37331bfe2d9c9053dbc18fe9a2e9cd027ed9d7554ed020a07e186534a109617f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "37331bfe2d9c9053dbc18fe9a2e9cd027ed9d7554ed020a07e186534a109617f", kill_on_drop: false }`
[INFO] [stdout] 37331bfe2d9c9053dbc18fe9a2e9cd027ed9d7554ed020a07e186534a109617f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 643b8a190a6585b2cb3e7d059aab84b7d2d4aeb87631b9a1b2c77e6aa44fd257
[INFO] running `Command { std: "docker" "start" "-a" "643b8a190a6585b2cb3e7d059aab84b7d2d4aeb87631b9a1b2c77e6aa44fd257", kill_on_drop: false }`
[INFO] [stderr]    Compiling tomlenv v0.4.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: lint `intra_doc_link_resolution_failure` has been renamed to `broken_intra_doc_links`
[INFO] [stdout]    --> src/lib.rs:283:5
[INFO] [stdout]     |
[INFO] [stdout] 283 |     intra_doc_link_resolution_failure,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use the new name: `broken_intra_doc_links`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(renamed_and_removed_lints)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lint `overlapping_patterns` has been renamed to `overlapping_range_endpoints`
[INFO] [stdout]    --> src/lib.rs:301:5
[INFO] [stdout]     |
[INFO] [stdout] 301 |     overlapping_patterns,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^ help: use the new name: `overlapping_range_endpoints`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lint `redundant_semicolon` has been renamed to `redundant_semicolons`
[INFO] [stdout]    --> src/lib.rs:306:5
[INFO] [stdout]     |
[INFO] [stdout] 306 |     redundant_semicolon,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^ help: use the new name: `redundant_semicolons`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]    --> src/lib.rs:266:1
[INFO] [stdout]     |
[INFO] [stdout] 266 | #![feature(crate_visibility_modifier, error_iter)]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 3 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 `tomlenv`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "643b8a190a6585b2cb3e7d059aab84b7d2d4aeb87631b9a1b2c77e6aa44fd257", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "643b8a190a6585b2cb3e7d059aab84b7d2d4aeb87631b9a1b2c77e6aa44fd257", kill_on_drop: false }`
[INFO] [stdout] 643b8a190a6585b2cb3e7d059aab84b7d2d4aeb87631b9a1b2c77e6aa44fd257