[INFO] fetching crate blasters 0.1.0...
[INFO] checking blasters-0.1.0 against master#dfd7b8d03fb93d0e03147d28b3be6d93260fa94d for pr-87050
[INFO] extracting crate blasters 0.1.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate blasters 0.1.0 on toolchain dfd7b8d03fb93d0e03147d28b3be6d93260fa94d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", 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-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "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" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "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" "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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 40ade78c006c229a816a8407e5155ba787d5e66eb146e43176f8938209794f04
[INFO] running `Command { std: "docker" "start" "-a" "40ade78c006c229a816a8407e5155ba787d5e66eb146e43176f8938209794f04", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "40ade78c006c229a816a8407e5155ba787d5e66eb146e43176f8938209794f04", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "40ade78c006c229a816a8407e5155ba787d5e66eb146e43176f8938209794f04", kill_on_drop: false }`
[INFO] [stdout] 40ade78c006c229a816a8407e5155ba787d5e66eb146e43176f8938209794f04
[INFO] running `Command { std: "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" "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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e9d93eb74b41fbfe35c4923b233929b61bba9a58034d64430ae5bf0d7040585d
[INFO] running `Command { std: "docker" "start" "-a" "e9d93eb74b41fbfe35c4923b233929b61bba9a58034d64430ae5bf0d7040585d", 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 trait impls
[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 trait impls
[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[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 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[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" "e9d93eb74b41fbfe35c4923b233929b61bba9a58034d64430ae5bf0d7040585d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e9d93eb74b41fbfe35c4923b233929b61bba9a58034d64430ae5bf0d7040585d", kill_on_drop: false }`
[INFO] [stdout] e9d93eb74b41fbfe35c4923b233929b61bba9a58034d64430ae5bf0d7040585d