[INFO] crate drone-macros 0.6.0 is already in cache
[INFO] testing drone-macros-0.6.0 against beta-2019-09-28 for beta-1.39-1
[INFO] extracting crate drone-macros 0.6.0 into work/builds/worker-7/source
[INFO] validating manifest of crates.io crate drone-macros 0.6.0 on toolchain beta-2019-09-28
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate drone-macros 0.6.0
[INFO] finished tweaking crates.io crate drone-macros 0.6.0
[INFO] tweaked toml for crates.io crate drone-macros 0.6.0 written to work/builds/worker-7/source/Cargo.toml
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "+beta-2019-09-28" "build" "--frozen"`
[INFO] [stdout] 30ab96e39eb70d65cb4f962e432994fc373ba63501eae1272a08a9942f1b817d
[INFO] running `"docker" "start" "-a" "30ab96e39eb70d65cb4f962e432994fc373ba63501eae1272a08a9942f1b817d"`
[INFO] [stderr]    Compiling drone-macros v0.6.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/lib.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | #![feature(proc_macro)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_left_matches': superseded by `trim_start_matches`
[INFO] [stderr]    --> src/heap.rs:177:22
[INFO] [stderr]     |
[INFO] [stderr] 177 |   let string = input.trim_left_matches("//!");
[INFO] [stderr]     |                      ^^^^^^^^^^^^^^^^^ help: replace the use of the deprecated item: `trim_start_matches`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_left_matches': superseded by `trim_start_matches`
[INFO] [stderr]   --> src/reg.rs:11:29
[INFO] [stderr]    |
[INFO] [stderr] 11 |         let string = string.trim_left_matches("//!");
[INFO] [stderr]    |                             ^^^^^^^^^^^^^^^^^ help: replace the use of the deprecated item: `trim_start_matches`
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_left_matches': superseded by `trim_start_matches`
[INFO] [stderr]   --> src/thread_local.rs:20:33
[INFO] [stderr]    |
[INFO] [stderr] 20 |             let string = string.trim_left_matches("//!");
[INFO] [stderr]    |                                 ^^^^^^^^^^^^^^^^^ help: replace the use of the deprecated item: `trim_start_matches`
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_left_matches': superseded by `trim_start_matches`
[INFO] [stderr]   --> src/thread_local.rs:23:33
[INFO] [stderr]    |
[INFO] [stderr] 23 |             let string = string.trim_left_matches("///");
[INFO] [stderr]    |                                 ^^^^^^^^^^^^^^^^^ help: replace the use of the deprecated item: `trim_start_matches`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: could not compile `drone-macros`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "30ab96e39eb70d65cb4f962e432994fc373ba63501eae1272a08a9942f1b817d"`
[INFO] running `"docker" "rm" "-f" "30ab96e39eb70d65cb4f962e432994fc373ba63501eae1272a08a9942f1b817d"`
[INFO] [stdout] 30ab96e39eb70d65cb4f962e432994fc373ba63501eae1272a08a9942f1b817d