[INFO] crate split_tokens 0.1.0 is already in cache
[INFO] testing split_tokens-0.1.0 against 1.44.0 for beta-1.45-1
[INFO] extracting crate split_tokens 0.1.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate split_tokens 0.1.0 on toolchain 1.44.0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate split_tokens 0.1.0
[INFO] finished tweaking crates.io crate split_tokens 0.1.0
[INFO] tweaked toml for crates.io crate split_tokens 0.1.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "MAP_USER_ID=0" "-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" "+1.44.0" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] ac9ce790acca5dedb0b7e8b1403222f6724e1ddda5a02e25b2dbc83a4a97d5e9
[INFO] running `"docker" "start" "-a" "ac9ce790acca5dedb0b7e8b1403222f6724e1ddda5a02e25b2dbc83a4a97d5e9"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling split_tokens v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.18s
[INFO] running `"docker" "inspect" "ac9ce790acca5dedb0b7e8b1403222f6724e1ddda5a02e25b2dbc83a4a97d5e9"`
[INFO] running `"docker" "rm" "-f" "ac9ce790acca5dedb0b7e8b1403222f6724e1ddda5a02e25b2dbc83a4a97d5e9"`
[INFO] [stdout] ac9ce790acca5dedb0b7e8b1403222f6724e1ddda5a02e25b2dbc83a4a97d5e9
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "MAP_USER_ID=0" "-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" "+1.44.0" "test" "--frozen" "--no-run"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 39153fde6c222663d5c386b2572e005eabbc5b9f62571149d061f04b88259bed
[INFO] running `"docker" "start" "-a" "39153fde6c222663d5c386b2572e005eabbc5b9f62571149d061f04b88259bed"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling split_tokens v0.1.0 (/opt/rustwide/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 stable 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] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "39153fde6c222663d5c386b2572e005eabbc5b9f62571149d061f04b88259bed"`
[INFO] running `"docker" "rm" "-f" "39153fde6c222663d5c386b2572e005eabbc5b9f62571149d061f04b88259bed"`
[INFO] [stdout] 39153fde6c222663d5c386b2572e005eabbc5b9f62571149d061f04b88259bed