[INFO] cloning repository https://github.com/mverleg/prover
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mverleg/prover" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmverleg%2Fprover", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmverleg%2Fprover'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5f42a6f9fed24c439c53dcbbfa59ceba5b44361e
[INFO] testing mverleg/prover against beta-2021-08-01 for beta-1.55-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmverleg%2Fprover" "/workspace/builds/worker-69/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-69/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mverleg/prover on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mverleg/prover
[INFO] finished tweaking git repo https://github.com/mverleg/prover
[INFO] tweaked toml for git repo https://github.com/mverleg/prover written to /workspace/builds/worker-69/source/Cargo.toml
[INFO] crate git repo https://github.com/mverleg/prover already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-69/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-69/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" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8dcd3bf99371d9711c395fb90a7be75ba141422da216e72dc8a5b422251ab870
[INFO] running `Command { std: "docker" "start" "-a" "8dcd3bf99371d9711c395fb90a7be75ba141422da216e72dc8a5b422251ab870", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8dcd3bf99371d9711c395fb90a7be75ba141422da216e72dc8a5b422251ab870", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8dcd3bf99371d9711c395fb90a7be75ba141422da216e72dc8a5b422251ab870", kill_on_drop: false }`
[INFO] [stdout] 8dcd3bf99371d9711c395fb90a7be75ba141422da216e72dc8a5b422251ab870
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-69/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-69/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4da8690b6924066adf93b22716e2eda81106346af4a9b812295eee1c9f4c4c16
[INFO] running `Command { std: "docker" "start" "-a" "4da8690b6924066adf93b22716e2eda81106346af4a9b812295eee1c9f4c4c16", kill_on_drop: false }`
[INFO] [stderr]    Compiling bound_prover v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/logic/mod.rs:14:13
[INFO] [stdout]    |
[INFO] [stdout] 14 |     Num(&'a Num<T>),
[INFO] [stdout]    |             ^^^^^^ help: use `dyn`: `dyn Num<T>`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `num::Num`
[INFO] [stdout]  --> src/logic/proposition.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use num::Num;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `logic::eql::Eql`
[INFO] [stdout]  --> src/notation.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use logic::eql::Eql;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `logic::gt::Gt`
[INFO] [stdout]  --> src/notation.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use logic::gt::Gt;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `logic::lt::Lt`
[INFO] [stdout]  --> src/notation.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use logic::lt::Lt;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `num::Num`
[INFO] [stdout]  --> src/notation.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use num::Num;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0038]: the trait `Num` cannot be made into an object
[INFO] [stdout]    --> src/logic/mod.rs:14:13
[INFO] [stdout]     |
[INFO] [stdout] 14  |     Num(&'a Num<T>),
[INFO] [stdout]     |             ^^^^^^ `Num` cannot be made into an object
[INFO] [stdout]     |
[INFO] [stdout] note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit <https://doc.rust-lang.org/reference/items/traits.html#object-safety>
[INFO] [stdout]    --> src/num/mod.rs:6:50
[INFO] [stdout]     |
[INFO] [stdout] 6   | pub trait Num<T>: Difficulty + Display + Clone + PartialEq + Eq + Hash where T: Nr {
[INFO] [stdout]     |           ---                                    ^^^^^^^^^ ...because it uses `Self` as a type parameter
[INFO] [stdout]     |           |
[INFO] [stdout]     |           this trait cannot be made into an object...
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0038`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `bound_prover` due to 2 previous errors; 6 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "4da8690b6924066adf93b22716e2eda81106346af4a9b812295eee1c9f4c4c16", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4da8690b6924066adf93b22716e2eda81106346af4a9b812295eee1c9f4c4c16", kill_on_drop: false }`
[INFO] [stdout] 4da8690b6924066adf93b22716e2eda81106346af4a9b812295eee1c9f4c4c16
