[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 1.54.0 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-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mverleg/prover on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "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-7/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" "+1.54.0" "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-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b88c8438df6847e7a78bbb3fb26ab9ecbc932d5a0ad2880f823757cf69ea8abb
[INFO] running `Command { std: "docker" "start" "-a" "b88c8438df6847e7a78bbb3fb26ab9ecbc932d5a0ad2880f823757cf69ea8abb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b88c8438df6847e7a78bbb3fb26ab9ecbc932d5a0ad2880f823757cf69ea8abb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b88c8438df6847e7a78bbb3fb26ab9ecbc932d5a0ad2880f823757cf69ea8abb", kill_on_drop: false }`
[INFO] [stdout] b88c8438df6847e7a78bbb3fb26ab9ecbc932d5a0ad2880f823757cf69ea8abb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+1.54.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5a8f28a1b46bbbbe7d063465e446f39aa37f7520b756afc5ae003abd2c2a3bb3
[INFO] running `Command { std: "docker" "start" "-a" "5a8f28a1b46bbbbe7d063465e446f39aa37f7520b756afc5ae003abd2c2a3bb3", 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 was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[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`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "5a8f28a1b46bbbbe7d063465e446f39aa37f7520b756afc5ae003abd2c2a3bb3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5a8f28a1b46bbbbe7d063465e446f39aa37f7520b756afc5ae003abd2c2a3bb3", kill_on_drop: false }`
[INFO] [stdout] 5a8f28a1b46bbbbe7d063465e446f39aa37f7520b756afc5ae003abd2c2a3bb3
