[INFO] crate blasters 0.1.0 is already in cache
[INFO] testing blasters-0.1.0 against beta-2020-06-03 for beta-1.45-1
[INFO] extracting crate blasters 0.1.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate blasters 0.1.0 on toolchain beta-2020-06-03
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate blasters 0.1.0
[INFO] finished tweaking crates.io crate blasters 0.1.0
[INFO] tweaked toml for crates.io crate blasters 0.1.0 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+beta-2020-06-03" "build" "--frozen"`
[INFO] [stdout] 83cadc560d724b1dd082b4cfa6da70040d3eca8e20788744d84d96902ccae174
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "83cadc560d724b1dd082b4cfa6da70040d3eca8e20788744d84d96902ccae174"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling optimath v0.1.0
[INFO] [stderr] error: `default` is only allowed on items in `impl` definitions
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/optimath-0.1.0/src/advanced.rs:20:2
[INFO] [stderr]    |
[INFO] [stderr] 20 |       pub default fn matrix_multiply<const O: usize>(
[INFO] [stderr]    |       ^   ------- `default` because of this
[INFO] [stderr]    |  _____|
[INFO] [stderr]    | |
[INFO] [stderr] 21 | |         &'a self,
[INFO] [stderr] 22 | |         other: &'b Matrix<T, N, O>,
[INFO] [stderr] 23 | |     ) -> Matrix<T, M, O> {
[INFO] [stderr] ...  |
[INFO] [stderr] 40 | |         output
[INFO] [stderr] 41 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr] 
[INFO] [stderr] error: `default` is only allowed on items in `impl` definitions
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/optimath-0.1.0/src/advanced.rs:49:2
[INFO] [stderr]    |
[INFO] [stderr] 49 |     pub default fn dot(self, other: &'b Vector<T, M>) -> T { (self * other).into_iter().sum() }
[INFO] [stderr]    |     ^^^^-------^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         `default` because of this
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/optimath-0.1.0/src/lib.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![feature(const_generics)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/optimath-0.1.0/src/lib.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | #![feature(specialization)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/optimath-0.1.0/src/lib.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | #![feature(trait_alias)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/optimath-0.1.0/src/lib.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | #![feature(maybe_uninit_extra)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/optimath-0.1.0/src/lib.rs:8:1
[INFO] [stderr]   |
[INFO] [stderr] 8 | #![feature(associated_type_defaults)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 7 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: could not compile `optimath`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "83cadc560d724b1dd082b4cfa6da70040d3eca8e20788744d84d96902ccae174"`
[INFO] running `"docker" "rm" "-f" "83cadc560d724b1dd082b4cfa6da70040d3eca8e20788744d84d96902ccae174"`
[INFO] [stdout] 83cadc560d724b1dd082b4cfa6da70040d3eca8e20788744d84d96902ccae174