[INFO] fetching crate blasters 0.1.0...
[INFO] checking blasters-0.1.0 against beta for pr-78714
[INFO] extracting crate blasters 0.1.0 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate blasters 0.1.0 on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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-14/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2779e4ba1dd0f5a91965bd93a173190e448c44473ebbf82266918d1f319a5fcd
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "2779e4ba1dd0f5a91965bd93a173190e448c44473ebbf82266918d1f319a5fcd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2779e4ba1dd0f5a91965bd93a173190e448c44473ebbf82266918d1f319a5fcd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2779e4ba1dd0f5a91965bd93a173190e448c44473ebbf82266918d1f319a5fcd", kill_on_drop: false }`
[INFO] [stdout] 2779e4ba1dd0f5a91965bd93a173190e448c44473ebbf82266918d1f319a5fcd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] aea17eb61b22156a4ef7937c4eada2bfb1c983d631266c69f74a6f4bad27f2d0
[INFO] running `Command { std: "docker" "start" "-a" "aea17eb61b22156a4ef7937c4eada2bfb1c983d631266c69f74a6f4bad27f2d0", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking optimath v0.1.0
[INFO] [stdout] error: `default` is only allowed on items in `impl` definitions
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/optimath-0.1.0/src/advanced.rs:20:2
[INFO] [stdout]    |
[INFO] [stdout] 20 |       pub default fn matrix_multiply<const O: usize>(
[INFO] [stdout]    |       ^   ------- `default` because of this
[INFO] [stdout]    |  _____|
[INFO] [stdout]    | |
[INFO] [stdout] 21 | |         &'a self,
[INFO] [stdout] 22 | |         other: &'b Matrix<T, N, O>,
[INFO] [stdout] 23 | |     ) -> Matrix<T, M, O> {
[INFO] [stdout] ...  |
[INFO] [stdout] 40 | |         output
[INFO] [stdout] 41 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: `default` is only allowed on items in `impl` definitions
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/optimath-0.1.0/src/advanced.rs:49:2
[INFO] [stdout]    |
[INFO] [stdout] 49 |     pub default fn dot(self, other: &'b Vector<T, M>) -> T { (self * other).into_iter().sum() }
[INFO] [stdout]    |     ^^^^-------^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         `default` because of this
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/optimath-0.1.0/src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(const_generics)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/optimath-0.1.0/src/lib.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(specialization)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/optimath-0.1.0/src/lib.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![feature(trait_alias)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/optimath-0.1.0/src/lib.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![feature(maybe_uninit_extra)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/optimath-0.1.0/src/lib.rs:8:1
[INFO] [stdout]   |
[INFO] [stdout] 8 | #![feature(associated_type_defaults)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `read` found for reference `&MaybeUninit<T>` in the current scope
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/optimath-0.1.0/src/types.rs:87:57
[INFO] [stdout]    |
[INFO] [stdout] 87 |             let out = unsafe { self.data.get_unchecked(self.pos).read() };
[INFO] [stdout]    |                                                                  ^^^^ method not found in `&MaybeUninit<T>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `read` found for reference `&MaybeUninit<T>` in the current scope
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/optimath-0.1.0/src/types.rs:99:47
[INFO] [stdout]    |
[INFO] [stdout] 99 |             unsafe { self.data.get_unchecked(self.pos).read() };
[INFO] [stdout]    |                                                        ^^^^ method not found in `&MaybeUninit<T>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 9 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0599.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `optimath`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "aea17eb61b22156a4ef7937c4eada2bfb1c983d631266c69f74a6f4bad27f2d0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aea17eb61b22156a4ef7937c4eada2bfb1c983d631266c69f74a6f4bad27f2d0", kill_on_drop: false }`
[INFO] [stdout] aea17eb61b22156a4ef7937c4eada2bfb1c983d631266c69f74a6f4bad27f2d0