[INFO] cloning repository https://github.com/Bestra/essence-of-datalog-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Bestra/essence-of-datalog-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBestra%2Fessence-of-datalog-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBestra%2Fessence-of-datalog-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 71c650e2bbdf48ebef34160183eb0297c5abdd1d
[INFO] testing Bestra/essence-of-datalog-rs against try#722e1797249a965b6335aebd65d777f917e498f1 for pr-91031
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBestra%2Fessence-of-datalog-rs" "/workspace/builds/worker-98/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-98/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Bestra/essence-of-datalog-rs on toolchain 722e1797249a965b6335aebd65d777f917e498f1
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Bestra/essence-of-datalog-rs
[INFO] finished tweaking git repo https://github.com/Bestra/essence-of-datalog-rs
[INFO] tweaked toml for git repo https://github.com/Bestra/essence-of-datalog-rs written to /workspace/builds/worker-98/source/Cargo.toml
[INFO] crate git repo https://github.com/Bestra/essence-of-datalog-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-98/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-98/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c8b8cbdcd7a05fbd9d4a05ff1761c619891c365c2304e2c28ad50e78da9d12ef
[INFO] running `Command { std: "docker" "start" "-a" "c8b8cbdcd7a05fbd9d4a05ff1761c619891c365c2304e2c28ad50e78da9d12ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c8b8cbdcd7a05fbd9d4a05ff1761c619891c365c2304e2c28ad50e78da9d12ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c8b8cbdcd7a05fbd9d4a05ff1761c619891c365c2304e2c28ad50e78da9d12ef", kill_on_drop: false }`
[INFO] [stdout] c8b8cbdcd7a05fbd9d4a05ff1761c619891c365c2304e2c28ad50e78da9d12ef
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-98/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-98/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b4e39ef9d78e2a8b5b47cc203bf18755c12c5c499ceda1cbbda0ccfec05af825
[INFO] running `Command { std: "docker" "start" "-a" "b4e39ef9d78e2a8b5b47cc203bf18755c12c5c499ceda1cbbda0ccfec05af825", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling datalog v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variant is never constructed: `Var`
[INFO] [stdout]  --> src/main.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     Var(String),
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Sym`
[INFO] [stdout]   --> src/main.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     Sym(String),
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `var`
[INFO] [stdout]   --> src/main.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 |     fn var(s: &str) -> Term {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `sym`
[INFO] [stdout]   --> src/main.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 |     fn sym(s: &str) -> Term {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `head`
[INFO] [stdout]   --> src/main.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 30 |     head: Atom,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `body`
[INFO] [stdout]   --> src/main.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 31 |     body: Atom,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `Program`
[INFO] [stdout]   --> src/main.rs:34:1
[INFO] [stdout]    |
[INFO] [stdout] 34 | type Program = Vec<Rule>;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `KnowledgeBase`
[INFO] [stdout]   --> src/main.rs:35:1
[INFO] [stdout]    |
[INFO] [stdout] 35 | type KnowledgeBase = Vec<Atom>;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `Substitution`
[INFO] [stdout]   --> src/main.rs:36:1
[INFO] [stdout]    |
[INFO] [stdout] 36 | type Substitution = HashMap<Term, Term>;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `substitute`
[INFO] [stdout]   --> src/main.rs:39:8
[INFO] [stdout]    |
[INFO] [stdout] 39 |     fn substitute(&self, substitution: Substitution) -> Atom {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: structure field `predSym` should have a snake case name
[INFO] [stdout]   --> src/main.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 |     predSym: String,
[INFO] [stdout]    |     ^^^^^^^ help: convert the identifier to snake case: `pred_sym`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.03s
[INFO] running `Command { std: "docker" "inspect" "b4e39ef9d78e2a8b5b47cc203bf18755c12c5c499ceda1cbbda0ccfec05af825", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b4e39ef9d78e2a8b5b47cc203bf18755c12c5c499ceda1cbbda0ccfec05af825", kill_on_drop: false }`
[INFO] [stdout] b4e39ef9d78e2a8b5b47cc203bf18755c12c5c499ceda1cbbda0ccfec05af825
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-98/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-98/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 935c1531cebbbd374a540c0b196e6ea5d4fe555b681bb8fed9313b25b96074ba
[INFO] running `Command { std: "docker" "start" "-a" "935c1531cebbbd374a540c0b196e6ea5d4fe555b681bb8fed9313b25b96074ba", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling datalog v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `head`
[INFO] [stdout]   --> src/main.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 30 |     head: Atom,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `body`
[INFO] [stdout]   --> src/main.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 31 |     body: Atom,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `Program`
[INFO] [stdout]   --> src/main.rs:34:1
[INFO] [stdout]    |
[INFO] [stdout] 34 | type Program = Vec<Rule>;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `KnowledgeBase`
[INFO] [stdout]   --> src/main.rs:35:1
[INFO] [stdout]    |
[INFO] [stdout] 35 | type KnowledgeBase = Vec<Atom>;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: structure field `predSym` should have a snake case name
[INFO] [stdout]   --> src/main.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 |     predSym: String,
[INFO] [stdout]    |     ^^^^^^^ help: convert the identifier to snake case: `pred_sym`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.23s
[INFO] running `Command { std: "docker" "inspect" "935c1531cebbbd374a540c0b196e6ea5d4fe555b681bb8fed9313b25b96074ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "935c1531cebbbd374a540c0b196e6ea5d4fe555b681bb8fed9313b25b96074ba", kill_on_drop: false }`
[INFO] [stdout] 935c1531cebbbd374a540c0b196e6ea5d4fe555b681bb8fed9313b25b96074ba
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-98/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-98/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] a9d512a0e685db25c8f9ccd6440d846106016b00276d26026b0bfc7211ff65a6
[INFO] running `Command { std: "docker" "start" "-a" "a9d512a0e685db25c8f9ccd6440d846106016b00276d26026b0bfc7211ff65a6", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: field is never read: `head`
[INFO] [stderr]   --> src/main.rs:30:5
[INFO] [stderr]    |
[INFO] [stderr] 30 |     head: Atom,
[INFO] [stderr]    |     ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `body`
[INFO] [stderr]   --> src/main.rs:31:5
[INFO] [stderr]    |
[INFO] [stderr] 31 |     body: Atom,
[INFO] [stderr]    |     ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type alias is never used: `Program`
[INFO] [stderr]   --> src/main.rs:34:1
[INFO] [stderr]    |
[INFO] [stderr] 34 | type Program = Vec<Rule>;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type alias is never used: `KnowledgeBase`
[INFO] [stderr]   --> src/main.rs:35:1
[INFO] [stderr]    |
[INFO] [stderr] 35 | type KnowledgeBase = Vec<Atom>;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: structure field `predSym` should have a snake case name
[INFO] [stderr]   --> src/main.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     predSym: String,
[INFO] [stderr]    |     ^^^^^^^ help: convert the identifier to snake case: `pred_sym`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `datalog` (bin "datalog" test) generated 5 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/datalog-b8a22d8aac78218b)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test tests::it_works ... ok
[INFO] [stdout] test tests::subs ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "a9d512a0e685db25c8f9ccd6440d846106016b00276d26026b0bfc7211ff65a6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a9d512a0e685db25c8f9ccd6440d846106016b00276d26026b0bfc7211ff65a6", kill_on_drop: false }`
[INFO] [stdout] a9d512a0e685db25c8f9ccd6440d846106016b00276d26026b0bfc7211ff65a6