[INFO] crate optimath 0.3.0 is already in cache
[INFO] testing optimath-0.3.0 against master#8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e for pr-74409
[INFO] extracting crate optimath 0.3.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate optimath 0.3.0 on toolchain 8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate optimath 0.3.0
[INFO] finished tweaking crates.io crate optimath 0.3.0
[INFO] tweaked toml for crates.io crate optimath 0.3.0 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "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_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "metadata" "--no-deps" "--format-version=1", 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] 61118092bdffec715b18d9bec8f6c09865834faa1715b1523ae4d2b450d1dea7
[INFO] running `Command { std: "docker" "start" "-a" "61118092bdffec715b18d9bec8f6c09865834faa1715b1523ae4d2b450d1dea7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "61118092bdffec715b18d9bec8f6c09865834faa1715b1523ae4d2b450d1dea7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "61118092bdffec715b18d9bec8f6c09865834faa1715b1523ae4d2b450d1dea7", kill_on_drop: false }`
[INFO] [stdout] 61118092bdffec715b18d9bec8f6c09865834faa1715b1523ae4d2b450d1dea7
[INFO] running `Command { std: "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=forbid" "-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@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "build" "--frozen" "--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] ca5a591519608e939c6b816f9a37bc750d884787815bf14e8c327f66fa3008b2
[INFO] running `Command { std: "docker" "start" "-a" "ca5a591519608e939c6b816f9a37bc750d884787815bf14e8c327f66fa3008b2", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.73
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling ppv-lite86 v0.2.8
[INFO] [stderr]    Compiling serde v1.0.114
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling optimath v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: `default` is only allowed on items in `impl` definitions
[INFO] [stdout]   --> 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]   --> 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: `default` is only allowed on items in `impl` definitions
[INFO] [stdout]   --> src/advanced.rs:57:2
[INFO] [stdout]    |
[INFO] [stdout] 57 |     pub default fn dot(&'a 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: constant expression depends on a generic parameter
[INFO] [stdout]   --> src/dimensional.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |     inner: ICEAvoider<T, { Dim::MUL }>,
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this may fail depending on what value the parameter takes
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `optimath`.
[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 `Command { std: "docker" "inspect" "ca5a591519608e939c6b816f9a37bc750d884787815bf14e8c327f66fa3008b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ca5a591519608e939c6b816f9a37bc750d884787815bf14e8c327f66fa3008b2", kill_on_drop: false }`
[INFO] [stdout] ca5a591519608e939c6b816f9a37bc750d884787815bf14e8c327f66fa3008b2