[INFO] cloning repository https://github.com/edmugabi/limi-prolog
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/edmugabi/limi-prolog" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fedmugabi%2Flimi-prolog", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fedmugabi%2Flimi-prolog'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9581d2d8e5324a22427c7268c7152d31b7d16e20
[INFO] checking edmugabi/limi-prolog against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fedmugabi%2Flimi-prolog" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/edmugabi/limi-prolog on toolchain 1f12b9b0fdbe735968ac002792a720f0ba4faca6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/edmugabi/limi-prolog
[INFO] finished tweaking git repo https://github.com/edmugabi/limi-prolog
[INFO] tweaked toml for git repo https://github.com/edmugabi/limi-prolog written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/edmugabi/limi-prolog already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 77e139cecc91440383a01c9b9525e9057f2d97d2b1095ca48eb9b81467bc98c8
[INFO] running `Command { std: "docker" "start" "-a" "77e139cecc91440383a01c9b9525e9057f2d97d2b1095ca48eb9b81467bc98c8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "77e139cecc91440383a01c9b9525e9057f2d97d2b1095ca48eb9b81467bc98c8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "77e139cecc91440383a01c9b9525e9057f2d97d2b1095ca48eb9b81467bc98c8", kill_on_drop: false }`
[INFO] [stdout] 77e139cecc91440383a01c9b9525e9057f2d97d2b1095ca48eb9b81467bc98c8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "RUSTDOCFLAGS=--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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a9b210969c7769e5816429f12b1a32921b73633a364a2b39b072d411fbdb4ab8
[INFO] running `Command { std: "docker" "start" "-a" "a9b210969c7769e5816429f12b1a32921b73633a364a2b39b072d411fbdb4ab8", kill_on_drop: false }`
[INFO] [stderr]    Compiling radium v0.5.3
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling lexical-core v0.7.6
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking funty v1.1.0
[INFO] [stderr]     Checking arrayvec v0.5.2
[INFO] [stderr]     Checking ryu v1.0.9
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]     Checking tap v1.0.1
[INFO] [stderr]     Checking wyz v0.2.0
[INFO] [stderr]     Checking static_assertions v1.1.0
[INFO] [stderr]    Compiling nom v6.2.1
[INFO] [stderr]     Checking bitvec v0.19.6
[INFO] [stderr]     Checking limi-prolog v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `alphanumeric1`
[INFO] [stdout]  --> src/parser.rs:5:47
[INFO] [stdout]   |
[INFO] [stdout] 5 | use nom::character::complete::{alphanumeric0, alphanumeric1, satisfy, space0};
[INFO] [stdout]   |                                               ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `value`
[INFO] [stdout]  --> src/parser.rs:6:54
[INFO] [stdout]   |
[INFO] [stdout] 6 | use nom::combinator::{all_consuming, map, recognize, value};
[INFO] [stdout]   |                                                      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `many0`
[INFO] [stdout]  --> src/parser.rs:7:18
[INFO] [stdout]   |
[INFO] [stdout] 7 | use nom::multi::{many0, many_m_n, separated_list0, separated_list1};
[INFO] [stdout]   |                  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `BTreeSet`
[INFO] [stdout]  --> src/term.rs:3:43
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::collections::{HashSet, BTreeMap, BTreeSet};
[INFO] [stdout]   |                                           ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::env`
[INFO] [stdout]  --> src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::env;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `pgoals`
[INFO] [stdout]   --> src/main.rs:11:31
[INFO] [stdout]    |
[INFO] [stdout] 11 | use crate::parser::{pprogram, pgoals};
[INFO] [stdout]    |                               ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `alphanumeric1`
[INFO] [stdout]  --> src/parser.rs:5:47
[INFO] [stdout]   |
[INFO] [stdout] 5 | use nom::character::complete::{alphanumeric0, alphanumeric1, satisfy, space0};
[INFO] [stdout]   |                                               ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `value`
[INFO] [stdout]  --> src/parser.rs:6:54
[INFO] [stdout]   |
[INFO] [stdout] 6 | use nom::combinator::{all_consuming, map, recognize, value};
[INFO] [stdout]   |                                                      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `many0`
[INFO] [stdout]  --> src/parser.rs:7:18
[INFO] [stdout]   |
[INFO] [stdout] 7 | use nom::multi::{many0, many_m_n, separated_list0, separated_list1};
[INFO] [stdout]   |                  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `BTreeSet`
[INFO] [stdout]  --> src/term.rs:3:43
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::collections::{HashSet, BTreeMap, BTreeSet};
[INFO] [stdout]   |                                           ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::env`
[INFO] [stdout]  --> src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::env;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/main.rs:79:5
[INFO] [stdout]    |
[INFO] [stdout] 28 | /     loop {
[INFO] [stdout] 29 | |         {
[INFO] [stdout] 30 | |             let mut handle = stdout.lock();
[INFO] [stdout] 31 | |             handle.write_all(b":- ")?;
[INFO] [stdout] ...  |
[INFO] [stdout] 76 | |         }
[INFO] [stdout] 77 | |     }
[INFO] [stdout]    | |_____- any code following this expression is unreachable
[INFO] [stdout] 78 |
[INFO] [stdout] 79 |       Ok(())
[INFO] [stdout]    |       ^^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/main.rs:79:5
[INFO] [stdout]    |
[INFO] [stdout] 28 | /     loop {
[INFO] [stdout] 29 | |         {
[INFO] [stdout] 30 | |             let mut handle = stdout.lock();
[INFO] [stdout] 31 | |             handle.write_all(b":- ")?;
[INFO] [stdout] ...  |
[INFO] [stdout] 76 | |         }
[INFO] [stdout] 77 | |     }
[INFO] [stdout]    | |_____- any code following this expression is unreachable
[INFO] [stdout] 78 |
[INFO] [stdout] 79 |       Ok(())
[INFO] [stdout]    |       ^^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `clauses` is never read
[INFO] [stdout]   --> src/main.rs:52:25
[INFO] [stdout]    |
[INFO] [stdout] 52 |                         clauses = cls;
[INFO] [stdout]    |                         ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Cyclic` is never used
[INFO] [stdout]    --> src/term.rs:141:6
[INFO] [stdout]     |
[INFO] [stdout] 141 | enum Cyclic {
[INFO] [stdout]     |      ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/clause.rs:16:19
[INFO] [stdout]    |
[INFO] [stdout] 15 | impl Clause {
[INFO] [stdout]    | ----------- associated function in this implementation
[INFO] [stdout] 16 |     pub(super) fn new(conds: Vec<Term>, conseqt: Term) -> Clause {
[INFO] [stdout]    |                   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `BFS` and `DLS` are never constructed
[INFO] [stdout]   --> src/sld.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub enum Strategy {
[INFO] [stdout]    |          -------- variants in this enum
[INFO] [stdout] 15 |     BFS,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 16 |     DFS,
[INFO] [stdout] 17 |     DLS(usize),
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Strategy` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `backchain_iddfs` is never used
[INFO] [stdout]   --> src/sld.rs:82:8
[INFO] [stdout]    |
[INFO] [stdout] 61 | impl<'b> CPoint<'b> {
[INFO] [stdout]    | ------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 82 |     fn backchain_iddfs(self) -> impl Iterator<Item=Env> + 'b where Self: 'b {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `empty` is never used
[INFO] [stdout]    --> src/sld.rs:160:12
[INFO] [stdout]     |
[INFO] [stdout] 158 | impl Env {
[INFO] [stdout]     | -------- associated function in this implementation
[INFO] [stdout] 159 |
[INFO] [stdout] 160 |     pub fn empty() -> Env {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `result`
[INFO] [stdout]    --> src/term.rs:297:13
[INFO] [stdout]     |
[INFO] [stdout] 297 |         let result = t1.unify_baader(&t2, &mut env);
[INFO] [stdout]     |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_result`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `clauses` is never read
[INFO] [stdout]   --> src/main.rs:52:25
[INFO] [stdout]    |
[INFO] [stdout] 52 |                         clauses = cls;
[INFO] [stdout]    |                         ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Cyclic` is never used
[INFO] [stdout]    --> src/term.rs:141:6
[INFO] [stdout]     |
[INFO] [stdout] 141 | enum Cyclic {
[INFO] [stdout]     |      ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/clause.rs:16:19
[INFO] [stdout]    |
[INFO] [stdout] 15 | impl Clause {
[INFO] [stdout]    | ----------- associated function in this implementation
[INFO] [stdout] 16 |     pub(super) fn new(conds: Vec<Term>, conseqt: Term) -> Clause {
[INFO] [stdout]    |                   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `DLS` is never constructed
[INFO] [stdout]   --> src/sld.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub enum Strategy {
[INFO] [stdout]    |          -------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 17 |     DLS(usize),
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Strategy` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `backchain_iddfs` is never used
[INFO] [stdout]   --> src/sld.rs:82:8
[INFO] [stdout]    |
[INFO] [stdout] 61 | impl<'b> CPoint<'b> {
[INFO] [stdout]    | ------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 82 |     fn backchain_iddfs(self) -> impl Iterator<Item=Env> + 'b where Self: 'b {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `empty` is never used
[INFO] [stdout]    --> src/sld.rs:160:12
[INFO] [stdout]     |
[INFO] [stdout] 158 | impl Env {
[INFO] [stdout]     | -------- associated function in this implementation
[INFO] [stdout] 159 |
[INFO] [stdout] 160 |     pub fn empty() -> Env {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.88s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: nom v6.2.1
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "a9b210969c7769e5816429f12b1a32921b73633a364a2b39b072d411fbdb4ab8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a9b210969c7769e5816429f12b1a32921b73633a364a2b39b072d411fbdb4ab8", kill_on_drop: false }`
[INFO] [stdout] a9b210969c7769e5816429f12b1a32921b73633a364a2b39b072d411fbdb4ab8