[INFO] crate nemo 0.2.1 is already in cache
[INFO] extracting crate nemo 0.2.1 into work/ex/beta-1.38-1/sources/1.37.0/reg/nemo/0.2.1
[INFO] extracting crate nemo 0.2.1 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/nemo/0.2.1
[INFO] validating manifest of nemo-0.2.1 on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of nemo-0.2.1 on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing nemo-0.2.1
[INFO] finished frobbing nemo-0.2.1
[INFO] frobbed toml for nemo-0.2.1 written to work/ex/beta-1.38-1/sources/1.37.0/reg/nemo/0.2.1/Cargo.toml
[INFO] started frobbing nemo-0.2.1
[INFO] finished frobbing nemo-0.2.1
[INFO] frobbed toml for nemo-0.2.1 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/nemo/0.2.1/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing nemo-0.2.1 against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/nemo/0.2.1:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] e2af78ec013dfd34f90074b344d6090f0e4557231ba3c051a69ad874ec8c6b0a
[INFO] running `"docker" "start" "-a" "e2af78ec013dfd34f90074b344d6090f0e4557231ba3c051a69ad874ec8c6b0a"`
[INFO] [stderr]    Compiling nemo v0.2.1 (/opt/crater/workdir)
[INFO] [stderr] error: `impl Trait for .. {}` is an obsolete syntax
[INFO] [stderr]   --> src/session_types/choose.rs:43:1
[INFO] [stderr]    |
[INFO] [stderr] 43 | impl NotSame for .. { }
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: use `auto trait Trait {}` instead
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]   --> src/lib.rs:14:1
[INFO] [stderr]    |
[INFO] [stderr] 14 | #![feature(optin_builtin_traits)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Channel`
[INFO] [stderr]  --> src/channels.rs:6:13
[INFO] [stderr]   |
[INFO] [stderr] 6 | use super::{Channel, Protocol, Transfers, IO};
[INFO] [stderr]   |             ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0192]: negative impls are only allowed for auto traits (e.g., `Send` and `Sync`)
[INFO] [stderr]   --> src/session_types/choose.rs:44:1
[INFO] [stderr]    |
[INFO] [stderr] 44 | impl<A> !NotSame for (A, A) { }
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0192, E0554.
[INFO] [stderr] For more information about an error, try `rustc --explain E0192`.
[INFO] [stderr] error: Could not compile `nemo`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "e2af78ec013dfd34f90074b344d6090f0e4557231ba3c051a69ad874ec8c6b0a"`
[INFO] running `"docker" "rm" "-f" "e2af78ec013dfd34f90074b344d6090f0e4557231ba3c051a69ad874ec8c6b0a"`
[INFO] [stdout] e2af78ec013dfd34f90074b344d6090f0e4557231ba3c051a69ad874ec8c6b0a