[INFO] fetching crate algebraics 0.2.0...
[INFO] testing algebraics-0.2.0 against beta-2020-08-29 for beta-1.47-1
[INFO] extracting crate algebraics 0.2.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate algebraics 0.2.0 on toolchain beta-2020-08-29
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate algebraics 0.2.0
[INFO] finished tweaking crates.io crate algebraics 0.2.0
[INFO] tweaked toml for crates.io crate algebraics 0.2.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded pyo3cls v0.9.2
[INFO] [stderr]   Downloaded pyo3-derive-backend v0.9.2
[INFO] [stderr]   Downloaded pyo3 v0.9.2
[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" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e1f17314c0db0233e5f0565ea11e020292fc5f31b0da21c0ac308ebeaabe29c2
[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" "e1f17314c0db0233e5f0565ea11e020292fc5f31b0da21c0ac308ebeaabe29c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e1f17314c0db0233e5f0565ea11e020292fc5f31b0da21c0ac308ebeaabe29c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e1f17314c0db0233e5f0565ea11e020292fc5f31b0da21c0ac308ebeaabe29c2", kill_on_drop: false }`
[INFO] [stdout] e1f17314c0db0233e5f0565ea11e020292fc5f31b0da21c0ac308ebeaabe29c2
[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=warn" "-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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 901cae739ad4d07a3e46f769a02aafde3eb87eb5cf04713eeea434c588f6b9dc
[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" "901cae739ad4d07a3e46f769a02aafde3eb87eb5cf04713eeea434c588f6b9dc", kill_on_drop: false }`
[INFO] [stderr]    Compiling rand_core v0.4.2
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]    Compiling num-integer v0.1.43
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling rand v0.5.6
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling algebraics v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0658]: use of unstable library feature 'trusted_random_access'
[INFO] [stdout]    --> src/array2d.rs:601:27
[INFO] [stdout]     |
[INFO] [stdout] 601 |                 Some(self.get_unchecked(x, y))
[INFO] [stdout]     |                           ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 662 | impl_positions_wrapper!(('a, T), IterWithPositions, ((usize, usize), &'a T));
[INFO] [stdout]     | ----------------------------------------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0061]: this function takes 1 argument but 2 arguments were supplied
[INFO] [stdout]    --> src/array2d.rs:601:27
[INFO] [stdout]     |
[INFO] [stdout] 601 |                 Some(self.get_unchecked(x, y))
[INFO] [stdout]     |                           ^^^^^^^^^^^^^ -  - supplied 2 arguments
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           expected 1 argument
[INFO] [stdout] ...
[INFO] [stdout] 662 | impl_positions_wrapper!(('a, T), IterWithPositions, ((usize, usize), &'a T));
[INFO] [stdout]     | ----------------------------------------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `array2d::IterWithPositions<'a, T>: std::iter::adapters::zip::TrustedRandomAccess` is not satisfied
[INFO] [stdout]    --> src/array2d.rs:601:27
[INFO] [stdout]     |
[INFO] [stdout] 601 |                 Some(self.get_unchecked(x, y))
[INFO] [stdout]     |                           ^^^^^^^^^^^^^ the trait `std::iter::adapters::zip::TrustedRandomAccess` is not implemented for `array2d::IterWithPositions<'a, T>`
[INFO] [stdout] ...
[INFO] [stdout] 662 | impl_positions_wrapper!(('a, T), IterWithPositions, ((usize, usize), &'a T));
[INFO] [stdout]     | ----------------------------------------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature 'trusted_random_access'
[INFO] [stdout]    --> src/array2d.rs:601:27
[INFO] [stdout]     |
[INFO] [stdout] 601 |                 Some(self.get_unchecked(x, y))
[INFO] [stdout]     |                           ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 719 | impl_positions_wrapper!(('a, T), Iter, &'a T);
[INFO] [stdout]     | ---------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0061]: this function takes 1 argument but 2 arguments were supplied
[INFO] [stdout]    --> src/array2d.rs:601:27
[INFO] [stdout]     |
[INFO] [stdout] 601 |                 Some(self.get_unchecked(x, y))
[INFO] [stdout]     |                           ^^^^^^^^^^^^^ -  - supplied 2 arguments
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           expected 1 argument
[INFO] [stdout] ...
[INFO] [stdout] 719 | impl_positions_wrapper!(('a, T), Iter, &'a T);
[INFO] [stdout]     | ---------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `array2d::Iter<'a, T>: std::iter::adapters::zip::TrustedRandomAccess` is not satisfied
[INFO] [stdout]    --> src/array2d.rs:601:27
[INFO] [stdout]     |
[INFO] [stdout] 601 |                 Some(self.get_unchecked(x, y))
[INFO] [stdout]     |                           ^^^^^^^^^^^^^ the trait `std::iter::adapters::zip::TrustedRandomAccess` is not implemented for `array2d::Iter<'a, T>`
[INFO] [stdout] ...
[INFO] [stdout] 719 | impl_positions_wrapper!(('a, T), Iter, &'a T);
[INFO] [stdout]     | ---------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 6 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0061, E0277, E0658.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0061`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `algebraics`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "901cae739ad4d07a3e46f769a02aafde3eb87eb5cf04713eeea434c588f6b9dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "901cae739ad4d07a3e46f769a02aafde3eb87eb5cf04713eeea434c588f6b9dc", kill_on_drop: false }`
[INFO] [stdout] 901cae739ad4d07a3e46f769a02aafde3eb87eb5cf04713eeea434c588f6b9dc