[INFO] crate idmap 0.2.16 is already in cache
[INFO] testing idmap-0.2.16 against beta-2019-09-28 for beta-1.39-1
[INFO] extracting crate idmap 0.2.16 into work/builds/worker-6/source
[INFO] validating manifest of crates.io crate idmap 0.2.16 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 idmap 0.2.16
[INFO] finished tweaking crates.io crate idmap 0.2.16
[INFO] tweaked toml for crates.io crate idmap 0.2.16 written to work/builds/worker-6/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-6/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-6/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] dacc677e0bef4ccc73a4837574ec120c931653a6aca89578a9f5dded77ccc7b0
[INFO] running `"docker" "start" "-a" "dacc677e0bef4ccc73a4837574ec120c931653a6aca89578a9f5dded77ccc7b0"`
[INFO] [stderr]    Compiling idmap-derive v0.1.1
[INFO] [stderr]    Compiling idmap v0.2.16 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/lib.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | #![feature(try_from, trusted_len, core_intrinsics, const_fn, drain_filter)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/table.rs:344:29
[INFO] [stderr]     |
[INFO] [stderr] 344 |     fn raw_debug(&self) -> &Debug where K: Debug, V: Debug;
[INFO] [stderr]     |                             ^^^^^ help: use `dyn`: `dyn Debug`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/table.rs:469:29
[INFO] [stderr]     |
[INFO] [stderr] 469 |     fn raw_debug(&self) -> &Debug where K: Debug, V: Debug {
[INFO] [stderr]     |                             ^^^^^ help: use `dyn`: `dyn Debug`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/table.rs:470:18
[INFO] [stderr]     |
[INFO] [stderr] 470 |         self as &Debug
[INFO] [stderr]     |                  ^^^^^ help: use `dyn`: `dyn Debug`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/table.rs:683:29
[INFO] [stderr]     |
[INFO] [stderr] 683 |     fn raw_debug(&self) -> &Debug where K: Debug, V: Debug {
[INFO] [stderr]     |                             ^^^^^ help: use `dyn`: `dyn Debug`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/table.rs:684:18
[INFO] [stderr]     |
[INFO] [stderr] 684 |         self as &Debug
[INFO] [stderr]     |                  ^^^^^ help: use `dyn`: `dyn Debug`
[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 `idmap`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "dacc677e0bef4ccc73a4837574ec120c931653a6aca89578a9f5dded77ccc7b0"`
[INFO] running `"docker" "rm" "-f" "dacc677e0bef4ccc73a4837574ec120c931653a6aca89578a9f5dded77ccc7b0"`
[INFO] [stdout] dacc677e0bef4ccc73a4837574ec120c931653a6aca89578a9f5dded77ccc7b0