[INFO] cloning repository https://github.com/newmancodes/rust-logical-reasoning
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/newmancodes/rust-logical-reasoning" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnewmancodes%2Frust-logical-reasoning", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnewmancodes%2Frust-logical-reasoning'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 34e4589a30e5cf817644f90caf28b33e146dbf04
[INFO] building newmancodes/rust-logical-reasoning against master#ce36a966c79e109dabeef7a47fe68e5294c6d71e for pr-137044-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnewmancodes%2Frust-logical-reasoning" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/newmancodes/rust-logical-reasoning on toolchain ce36a966c79e109dabeef7a47fe68e5294c6d71e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ce36a966c79e109dabeef7a47fe68e5294c6d71e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/newmancodes/rust-logical-reasoning
[INFO] finished tweaking git repo https://github.com/newmancodes/rust-logical-reasoning
[INFO] tweaked toml for git repo https://github.com/newmancodes/rust-logical-reasoning written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/newmancodes/rust-logical-reasoning 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" "+ce36a966c79e109dabeef7a47fe68e5294c6d71e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded anyhow v1.0.38
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+ce36a966c79e109dabeef7a47fe68e5294c6d71e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f2e8e85d484d7a421c1c554a5146073d440623992e1d69642533bb07f5723b56
[INFO] running `Command { std: "docker" "start" "-a" "f2e8e85d484d7a421c1c554a5146073d440623992e1d69642533bb07f5723b56", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f2e8e85d484d7a421c1c554a5146073d440623992e1d69642533bb07f5723b56", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f2e8e85d484d7a421c1c554a5146073d440623992e1d69642533bb07f5723b56", kill_on_drop: false }`
[INFO] [stdout] f2e8e85d484d7a421c1c554a5146073d440623992e1d69642533bb07f5723b56
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+ce36a966c79e109dabeef7a47fe68e5294c6d71e" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 313a19d3c8d6fb95026fc4b5dcb654ccac23db2827be44beaf2de498f7629489
[INFO] running `Command { std: "docker" "start" "-a" "313a19d3c8d6fb95026fc4b5dcb654ccac23db2827be44beaf2de498f7629489", kill_on_drop: false }`
[INFO] [stderr]    Compiling anyhow v1.0.38
[INFO] [stderr]    Compiling rust-logical-reasoning v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `ForwardChaining` is never constructed
[INFO] [stdout]  --> src/forward_chaining.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct ForwardChaining {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `entails` are never used
[INFO] [stdout]   --> src/forward_chaining.rs:8:12
[INFO] [stdout]    |
[INFO] [stdout] 7  | impl ForwardChaining {
[INFO] [stdout]    | -------------------- associated items in this implementation
[INFO] [stdout] 8  |     pub fn new(knowledge_base: Vec<HornClause>) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 14 |     pub fn entails(self, n: i8) -> bool {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `HornClause` is never constructed
[INFO] [stdout]  --> src/horn_clause.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct HornClause {
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `iter` are never used
[INFO] [stdout]   --> src/horn_clause.rs:6:12
[INFO] [stdout]    |
[INFO] [stdout] 5  | impl HornClause {
[INFO] [stdout]    | --------------- associated items in this implementation
[INFO] [stdout] 6  |     pub fn new(literals: Vec<i8>) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 12 |     pub fn iter(&self) -> std::slice::Iter<'_, i8> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.15s
[INFO] running `Command { std: "docker" "inspect" "313a19d3c8d6fb95026fc4b5dcb654ccac23db2827be44beaf2de498f7629489", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "313a19d3c8d6fb95026fc4b5dcb654ccac23db2827be44beaf2de498f7629489", kill_on_drop: false }`
[INFO] [stdout] 313a19d3c8d6fb95026fc4b5dcb654ccac23db2827be44beaf2de498f7629489
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+ce36a966c79e109dabeef7a47fe68e5294c6d71e" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c18dd6e408d7190cb7f70c487d03229690d232b76b420876f2639535d27a599b
[INFO] running `Command { std: "docker" "start" "-a" "c18dd6e408d7190cb7f70c487d03229690d232b76b420876f2639535d27a599b", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-logical-reasoning v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.36s
[INFO] running `Command { std: "docker" "inspect" "c18dd6e408d7190cb7f70c487d03229690d232b76b420876f2639535d27a599b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c18dd6e408d7190cb7f70c487d03229690d232b76b420876f2639535d27a599b", kill_on_drop: false }`
[INFO] [stdout] c18dd6e408d7190cb7f70c487d03229690d232b76b420876f2639535d27a599b