[INFO] cloning repository https://github.com/Bram-Hub/aris
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Bram-Hub/aris" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBram-Hub%2Faris"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBram-Hub%2Faris'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b5c2713a3be2135346aad7e118f3aa879300430b
[INFO] checking Bram-Hub/aris against try#89c05fd3cc6404a13e1bd71450c6132a2755fa4b for pr-69741
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBram-Hub%2Faris" "/workspace/builds/worker-3/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Bram-Hub/aris on toolchain 89c05fd3cc6404a13e1bd71450c6132a2755fa4b
[INFO] running `"/workspace/cargo-home/bin/cargo" "+89c05fd3cc6404a13e1bd71450c6132a2755fa4b" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/Bram-Hub/aris
[INFO] finished tweaking git repo https://github.com/Bram-Hub/aris
[INFO] tweaked toml for git repo https://github.com/Bram-Hub/aris written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/Bram-Hub/aris already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+89c05fd3cc6404a13e1bd71450c6132a2755fa4b" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+89c05fd3cc6404a13e1bd71450c6132a2755fa4b" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] db50b6b6226552c73f45730dc6680b5a688a60d2d7aa0ddde47b10931176969a
[INFO] running `"docker" "start" "-a" "db50b6b6226552c73f45730dc6680b5a688a60d2d7aa0ddde47b10931176969a"`
[INFO] [stderr]    Compiling frunk_core v0.2.4
[INFO] [stderr]    Compiling cbindgen v0.13.1
[INFO] [stderr]     Checking vec_mut_scan v0.1.0
[INFO] [stderr]    Compiling backtrace-sys v0.1.33
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling syn v1.0.16
[INFO] [stderr]    Compiling aho-corasick v0.7.9
[INFO] [stderr]     Checking syn v0.15.44
[INFO] [stderr]    Compiling partial_ref_derive v0.3.1
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.1
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling backtrace v0.3.45
[INFO] [stderr]    Compiling regex v1.3.4
[INFO] [stderr]     Checking partial_ref v0.3.1
[INFO] [stderr]    Compiling tempfile v3.1.0
[INFO] [stderr]    Compiling varisat-internal-macros v0.2.1
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]    Compiling frunk_proc_macro_helpers v0.0.2
[INFO] [stderr]    Compiling frunk_derives v0.2.4
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]    Compiling failure_derive v0.1.6
[INFO] [stderr]    Compiling proc-macro-hack v0.5.11
[INFO] [stderr]     Checking failure v0.1.6
[INFO] [stderr]     Checking varisat-dimacs v0.2.1
[INFO] [stderr]     Checking varisat-internal-proof v0.2.1
[INFO] [stderr]    Compiling varisat v0.2.1
[INFO] [stderr]    Compiling frunk_proc_macros_impl v0.0.2
[INFO] [stderr]     Checking varisat-checker v0.2.1
[INFO] [stderr]     Checking frunk_proc_macros v0.0.2
[INFO] [stderr]     Checking frunk v0.2.4
[INFO] [stderr]    Compiling serde v1.0.104
[INFO] [stderr]    Compiling toml v0.5.6
[INFO] [stderr]    Compiling serde_json v1.0.48
[INFO] [stderr]    Compiling libaris-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `BSymbol`
[INFO] [stderr]  --> src/solver_integration/solver.rs:3:40
[INFO] [stderr]   |
[INFO] [stderr] 3 | use crate::expression::{Expr, ASymbol, BSymbol, USymbol};
[INFO] [stderr]   |                                        ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `CnfFormula`, `Var`, `solver::Solver`
[INFO] [stderr]  --> src/solver_integration/solver.rs:1:15
[INFO] [stderr]   |
[INFO] [stderr] 1 | use varisat::{CnfFormula, Lit, Var, solver::Solver, checker::{ProofProcessor, CheckedProofStep}, ExtendFormula};
[INFO] [stderr]   |               ^^^^^^^^^^       ^^^  ^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `pooledproof::PooledProof`
[INFO] [stderr]  --> src/solver_integration/solver.rs:2:28
[INFO] [stderr]   |
[INFO] [stderr] 2 | use crate::proofs::{Proof, pooledproof::PooledProof, Justification};
[INFO] [stderr]   |                            ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `BSymbol`
[INFO] [stderr]  --> src/solver_integration/solver.rs:3:40
[INFO] [stderr]   |
[INFO] [stderr] 3 | use crate::expression::{Expr, ASymbol, BSymbol, USymbol};
[INFO] [stderr]   |                                        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `ExtendFormula`
[INFO] [stderr]  --> src/solver_integration/solver.rs:1:98
[INFO] [stderr]   |
[INFO] [stderr] 1 | use varisat::{CnfFormula, Lit, Var, solver::Solver, checker::{ProofProcessor, CheckedProofStep}, ExtendFormula};
[INFO] [stderr]   |                                                                                                  ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_expr`
[INFO] [stderr]    --> src/proofs/treeproof.rs:130:5
[INFO] [stderr]     |
[INFO] [stderr] 130 |     fn get_expr(&self) -> &Expr {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `increment_indices`
[INFO] [stderr]    --> src/proofs/pooledproof.rs:201:5
[INFO] [stderr]     |
[INFO] [stderr] 201 |     fn increment_indices(&mut self, i: PremKey, j: JustKey, k: SubKey) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `add_pools`
[INFO] [stderr]    --> src/proofs/pooledproof.rs:213:5
[INFO] [stderr]     |
[INFO] [stderr] 213 |     fn add_pools(&mut self, other: &Self) -> (PremKey, JustKey, SubKey) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/solver_integration/solver.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 |     fn new() -> SatProofBuilder<P> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_expr`
[INFO] [stderr]    --> src/proofs/treeproof.rs:130:5
[INFO] [stderr]     |
[INFO] [stderr] 130 |     fn get_expr(&self) -> &Expr {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `increment_indices`
[INFO] [stderr]    --> src/proofs/pooledproof.rs:201:5
[INFO] [stderr]     |
[INFO] [stderr] 201 |     fn increment_indices(&mut self, i: PremKey, j: JustKey, k: SubKey) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `add_pools`
[INFO] [stderr]    --> src/proofs/pooledproof.rs:213:5
[INFO] [stderr]     |
[INFO] [stderr] 213 |     fn add_pools(&mut self, other: &Self) -> (PremKey, JustKey, SubKey) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/bin/auto_grader.rs:100:87
[INFO] [stderr]     |
[INFO] [stderr] 100 |                     let (index, _) = s_prf_with_lines.lines.iter().enumerate().find(|(i, rl)| rl.reference == r)
[INFO] [stderr]     |                                                                                       ^ help: consider prefixing with an underscore: `_i`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s_meta`
[INFO] [stderr]   --> src/bin/auto_grader.rs:75:17
[INFO] [stderr]    |
[INFO] [stderr] 75 |     let (s_prf, s_meta) = proof_from_xml::<P, _>(&student_file).unwrap();
[INFO] [stderr]    |                 ^^^^^^ help: consider prefixing with an underscore: `_s_meta`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `instructor_lines`
[INFO] [stderr]   --> src/bin/auto_grader.rs:89:9
[INFO] [stderr]    |
[INFO] [stderr] 89 |     let instructor_lines = i_prf.direct_lines();
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_instructor_lines`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/bin/auto_grader.rs:100:87
[INFO] [stderr]     |
[INFO] [stderr] 100 |                     let (index, _) = s_prf_with_lines.lines.iter().enumerate().find(|(i, rl)| rl.reference == r)
[INFO] [stderr]     |                                                                                       ^ help: consider prefixing with an underscore: `_i`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s_meta`
[INFO] [stderr]   --> src/bin/auto_grader.rs:75:17
[INFO] [stderr]    |
[INFO] [stderr] 75 |     let (s_prf, s_meta) = proof_from_xml::<P, _>(&student_file).unwrap();
[INFO] [stderr]    |                 ^^^^^^ help: consider prefixing with an underscore: `_s_meta`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `instructor_lines`
[INFO] [stderr]   --> src/bin/auto_grader.rs:89:9
[INFO] [stderr]    |
[INFO] [stderr] 89 |     let instructor_lines = i_prf.direct_lines();
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_instructor_lines`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2m 23s
[INFO] running `"docker" "inspect" "db50b6b6226552c73f45730dc6680b5a688a60d2d7aa0ddde47b10931176969a"`
[INFO] running `"docker" "rm" "-f" "db50b6b6226552c73f45730dc6680b5a688a60d2d7aa0ddde47b10931176969a"`
[INFO] [stdout] db50b6b6226552c73f45730dc6680b5a688a60d2d7aa0ddde47b10931176969a