[INFO] cloning repository https://github.com/Sintrastes/pure-prolog-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Sintrastes/pure-prolog-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSintrastes%2Fpure-prolog-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSintrastes%2Fpure-prolog-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c528eda274848e3ed19b955b0dbc2242e7ca405b
[INFO] building Sintrastes/pure-prolog-rs against master#881c1ac408d93bb7adaa3a51dabab9266e82eee8 for issue-85264
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSintrastes%2Fpure-prolog-rs" "/workspace/builds/worker-11/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-11/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Sintrastes/pure-prolog-rs on toolchain 881c1ac408d93bb7adaa3a51dabab9266e82eee8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+881c1ac408d93bb7adaa3a51dabab9266e82eee8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Sintrastes/pure-prolog-rs
[INFO] finished tweaking git repo https://github.com/Sintrastes/pure-prolog-rs
[INFO] tweaked toml for git repo https://github.com/Sintrastes/pure-prolog-rs written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate git repo https://github.com/Sintrastes/pure-prolog-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+881c1ac408d93bb7adaa3a51dabab9266e82eee8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded mdo v0.3.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+881c1ac408d93bb7adaa3a51dabab9266e82eee8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9f36b565eeca58410b630d6dc078e600aff1c4ce39c0eab6113d25c5e6c3751f
[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" "9f36b565eeca58410b630d6dc078e600aff1c4ce39c0eab6113d25c5e6c3751f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9f36b565eeca58410b630d6dc078e600aff1c4ce39c0eab6113d25c5e6c3751f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9f36b565eeca58410b630d6dc078e600aff1c4ce39c0eab6113d25c5e6c3751f", kill_on_drop: false }`
[INFO] [stdout] 9f36b565eeca58410b630d6dc078e600aff1c4ce39c0eab6113d25c5e6c3751f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+881c1ac408d93bb7adaa3a51dabab9266e82eee8" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6104246bf882dc31d8386b95817b8f554b19052ec045203b3db010d0d5d7e030
[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" "6104246bf882dc31d8386b95817b8f554b19052ec045203b3db010d0d5d7e030", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.54
[INFO] [stderr]    Compiling mdo v0.3.0
[INFO] [stderr]    Compiling derive_more v0.99.11
[INFO] [stderr]    Compiling bedelibry-prolog-runtime-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the feature `unsized_locals` is incomplete and may not be safe to use and/or cause compiler crashes
[INFO] [stdout]  --> src/main.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![feature(unsized_locals)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(incomplete_features)]` on by default
[INFO] [stdout]   = note: see issue #48055 <https://github.com/rust-lang/rust/issues/48055> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: `Vec<&tree::Tree<term::Goal<'_, T, V>, unifiable::Unifier<'_, V, term::Term<'_, T, V>>>>` is not an iterator
[INFO] [stdout]    --> src/interp.rs:34:21
[INFO] [stdout]     |
[INFO] [stdout] 34  |           let trees = mdo! {
[INFO] [stdout]     |  _____________________^
[INFO] [stdout] 35  | |             clause =<< program.clauses.iter();
[INFO] [stdout] 36  | |             let Clause {head: clauseHead, body: clauseBody} = freshen(varsInGoal.clone(), clause);
[INFO] [stdout] 37  | |             ret match Term::unify(&clauseHead, &t) {
[INFO] [stdout] ...   |
[INFO] [stdout] 52  | |             }
[INFO] [stdout] 53  | |         };
[INFO] [stdout]     | |_________^ `Vec<&tree::Tree<term::Goal<'_, T, V>, unifiable::Unifier<'_, V, term::Term<'_, T, V>>>>` is not an iterator
[INFO] [stdout]     | 
[INFO] [stdout]    ::: /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/mdo-0.3.0/src/lib.rs:133:27
[INFO] [stdout]     |
[INFO] [stdout] 133 |       where I: Iterator, U: Iterator, F: FnMut(<I as Iterator>::Item) -> U {
[INFO] [stdout]     |                             -------- required by this bound in `mdo::iter::bind`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `std::iter::Iterator` is not implemented for `Vec<&tree::Tree<term::Goal<'_, T, V>, unifiable::Unifier<'_, V, term::Term<'_, T, V>>>>`
[INFO] [stdout]     = note: required because of the requirements on the impl of `std::iter::Iterator` for `&mut Vec<&tree::Tree<term::Goal<'_, T, V>, unifiable::Unifier<'_, V, term::Term<'_, T, V>>>>`
[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[E0271]: type mismatch resolving `<FlatMap<std::slice::Iter<'_, term::Clause<'_, T, V>>, &mut Vec<&tree::Tree<term::Goal<'_, T, V>, unifiable::Unifier<'_, V, term::Term<'_, T, V>>>>, [closure@/opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/mdo-0.3.0/src/lib.rs:64:18: 64:45]> as std::iter::Iterator>::Item == tree::Tree<term::Goal<'_, T, V>, _>`
[INFO] [stdout]   --> src/interp.rs:57:31
[INFO] [stdout]    |
[INFO] [stdout] 57 |                 goal.clone(), lazy_trees
[INFO] [stdout]    |                               ^^^^^^^^^^ expected enum `tree::Tree`, found `&mut _`
[INFO] [stdout]    |
[INFO] [stdout]    = note:           expected enum `tree::Tree<term::Goal<'_, T, V>, _>`
[INFO] [stdout]            found mutable reference `&mut &tree::Tree<term::Goal<'_, T, V>, unifiable::Unifier<'_, V, term::Term<'_, T, V>>>`
[INFO] [stdout]    = note: required for the cast to the object type `dyn std::iter::Iterator<Item = tree::Tree<term::Goal<'_, T, V>, _>>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0271, E0277.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0271`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `bedelibry-prolog-runtime-rs`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "6104246bf882dc31d8386b95817b8f554b19052ec045203b3db010d0d5d7e030", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6104246bf882dc31d8386b95817b8f554b19052ec045203b3db010d0d5d7e030", kill_on_drop: false }`
[INFO] [stdout] 6104246bf882dc31d8386b95817b8f554b19052ec045203b3db010d0d5d7e030
