[INFO] crate split_tokens 0.1.0 is already in cache
[INFO] extracting crate split_tokens 0.1.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/split_tokens/0.1.0
[INFO] extracting crate split_tokens 0.1.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/split_tokens/0.1.0
[INFO] validating manifest of split_tokens-0.1.0 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 split_tokens-0.1.0 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 split_tokens-0.1.0
[INFO] finished frobbing split_tokens-0.1.0
[INFO] frobbed toml for split_tokens-0.1.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/split_tokens/0.1.0/Cargo.toml
[INFO] started frobbing split_tokens-0.1.0
[INFO] finished frobbing split_tokens-0.1.0
[INFO] frobbed toml for split_tokens-0.1.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/split_tokens/0.1.0/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 split_tokens-0.1.0 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-2/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/split_tokens/0.1.0:/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] e78e5bbe0ca28dc3662b3531e5a8ee5d050d0738cffc7f035e482040c245f39c
[INFO] running `"docker" "start" "-a" "e78e5bbe0ca28dc3662b3531e5a8ee5d050d0738cffc7f035e482040c245f39c"`
[INFO] [stderr]    Compiling split_tokens v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.30s
[INFO] running `"docker" "inspect" "e78e5bbe0ca28dc3662b3531e5a8ee5d050d0738cffc7f035e482040c245f39c"`
[INFO] running `"docker" "rm" "-f" "e78e5bbe0ca28dc3662b3531e5a8ee5d050d0738cffc7f035e482040c245f39c"`
[INFO] [stdout] e78e5bbe0ca28dc3662b3531e5a8ee5d050d0738cffc7f035e482040c245f39c
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/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/split_tokens/0.1.0:/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" "test" "--frozen" "--no-run"`
[INFO] [stdout] 30314ec166f99499badd5a9d02774a1f4cf61d2a0ccc4a8f5e3ed189c7f40840
[INFO] running `"docker" "start" "-a" "30314ec166f99499badd5a9d02774a1f4cf61d2a0ccc4a8f5e3ed189c7f40840"`
[INFO] [stderr]    Compiling split_tokens v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] note: trace_macro
[INFO] [stderr]   --> src/lib.rs:65:5
[INFO] [stderr]    |
[INFO] [stderr] 65 |     split_tokens!{(>>+=-=<<) then stringify!()};
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: expanding `split_tokens! { (>> += -= <<) then stringify ! () }`
[INFO] [stderr]    = note: to `split_tokens ! (@ inner (>> += -= <<) () (stringify)) ;`
[INFO] [stderr]    = note: expanding `split_tokens! { @ inner (>> += -= <<) () (stringify) }`
[INFO] [stderr]    = note: to `split_tokens ! (@ inner (+= -= <<) (> >) (stringify)) ;`
[INFO] [stderr]    = note: expanding `split_tokens! { @ inner (+= -= <<) (> >) (stringify) }`
[INFO] [stderr]    = note: to `split_tokens ! (@ inner (-= <<) (> > + =) (stringify)) ;`
[INFO] [stderr]    = note: expanding `split_tokens! { @ inner (-= <<) (> > + =) (stringify) }`
[INFO] [stderr]    = note: to `split_tokens ! (@ inner (<<) (> > + = - =) (stringify)) ;`
[INFO] [stderr]    = note: expanding `split_tokens! { @ inner (<<) (> > + = - =) (stringify) }`
[INFO] [stderr]    = note: to `split_tokens ! (@ inner () (> > + = - = < <) (stringify)) ;`
[INFO] [stderr]    = note: expanding `split_tokens! { @ inner () (> > + = - = < <) (stringify) }`
[INFO] [stderr]    = note: to `stringify ! (() (> > + = - = < <)) ;`
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/lib.rs:1:19
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![cfg_attr(test, feature(trace_macros))]
[INFO] [stderr]   |                   ^^^^^^^^^^^^^^^^^^^^^
[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 `split_tokens`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "30314ec166f99499badd5a9d02774a1f4cf61d2a0ccc4a8f5e3ed189c7f40840"`
[INFO] running `"docker" "rm" "-f" "30314ec166f99499badd5a9d02774a1f4cf61d2a0ccc4a8f5e3ed189c7f40840"`
[INFO] [stdout] 30314ec166f99499badd5a9d02774a1f4cf61d2a0ccc4a8f5e3ed189c7f40840