[INFO] cloning repository https://github.com/shinkwhek/SATsolver
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/shinkwhek/SATsolver" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshinkwhek%2FSATsolver", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshinkwhek%2FSATsolver'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] be638a5296a4ad1884c0952d59ed7ba62739ccc9
[INFO] testing shinkwhek/SATsolver against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshinkwhek%2FSATsolver" "/workspace/builds/worker-51/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-51/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/shinkwhek/SATsolver on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/shinkwhek/SATsolver
[INFO] finished tweaking git repo https://github.com/shinkwhek/SATsolver
[INFO] tweaked toml for git repo https://github.com/shinkwhek/SATsolver written to /workspace/builds/worker-51/source/Cargo.toml
[INFO] crate git repo https://github.com/shinkwhek/SATsolver already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-51/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-51/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0199c042bfc02d1ab7242cd12a6d86ea5d04a0c991bdfe02d85aa73d5fcfac4a
[INFO] running `Command { std: "docker" "start" "-a" "0199c042bfc02d1ab7242cd12a6d86ea5d04a0c991bdfe02d85aa73d5fcfac4a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0199c042bfc02d1ab7242cd12a6d86ea5d04a0c991bdfe02d85aa73d5fcfac4a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0199c042bfc02d1ab7242cd12a6d86ea5d04a0c991bdfe02d85aa73d5fcfac4a", kill_on_drop: false }`
[INFO] [stdout] 0199c042bfc02d1ab7242cd12a6d86ea5d04a0c991bdfe02d85aa73d5fcfac4a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-51/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-51/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6ce140878bfc4e1d92a46ebe39169f3c33e2d51000c89a0c96bb2be2b2ddf3a9
[INFO] running `Command { std: "docker" "start" "-a" "6ce140878bfc4e1d92a46ebe39169f3c33e2d51000c89a0c96bb2be2b2ddf3a9", 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] [stderr]    Compiling unicode-width v0.1.4
[INFO] [stderr]    Compiling libc v0.2.39
[INFO] [stderr]    Compiling bitflags v1.0.1
[INFO] [stderr]    Compiling strsim v0.7.0
[INFO] [stderr]    Compiling vec_map v0.8.0
[INFO] [stderr]    Compiling ansi_term v0.9.0
[INFO] [stderr]    Compiling textwrap v0.9.0
[INFO] [stderr]    Compiling atty v0.2.8
[INFO] [stderr]    Compiling clap v2.31.1
[INFO] [stderr]    Compiling satsolver v1.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: type alias is never used: `Cnf`
[INFO] [stdout]  --> src/lexer.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | type Cnf = Vec<Vec<isize>>;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Lexer`
[INFO] [stdout]  --> src/lexer.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct Lexer;
[INFO] [stdout]   |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]  --> src/lexer.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 |     pub fn new(filename: &str) -> Cnf {
[INFO] [stdout]   |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `parse_line`
[INFO] [stdout]   --> src/lexer.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn parse_line(s: &str) -> Vec<isize> {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/solver.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub fn new(cnf: Cnf) -> Dpll {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `solver`
[INFO] [stdout]   --> src/solver.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 |     pub fn solver(self) -> Option<Self> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `unit_propagation`
[INFO] [stdout]   --> src/solver.rs:43:8
[INFO] [stdout]    |
[INFO] [stdout] 43 |     fn unit_propagation(self) -> Self {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `assign`
[INFO] [stdout]   --> src/solver.rs:50:8
[INFO] [stdout]    |
[INFO] [stdout] 50 |     fn assign(&self, lit: Literal) -> Self {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `retain_lit`
[INFO] [stdout]   --> src/solver.rs:64:4
[INFO] [stdout]    |
[INFO] [stdout] 64 | fn retain_lit(mut cl: Clause, lit: Literal) -> Clause {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `exists_empty_clause`
[INFO] [stdout]   --> src/solver.rs:70:8
[INFO] [stdout]    |
[INFO] [stdout] 70 |     fn exists_empty_clause(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_unit_literal`
[INFO] [stdout]   --> src/solver.rs:74:8
[INFO] [stdout]    |
[INFO] [stdout] 74 |     fn get_unit_literal(&self) -> Option<Literal> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `heuristic_select`
[INFO] [stdout]   --> src/solver.rs:81:8
[INFO] [stdout]    |
[INFO] [stdout] 81 |     fn heuristic_select(&self) -> Literal {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_empty`
[INFO] [stdout]   --> src/solver.rs:85:8
[INFO] [stdout]    |
[INFO] [stdout] 85 |     fn is_empty(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.79s
[INFO] running `Command { std: "docker" "inspect" "6ce140878bfc4e1d92a46ebe39169f3c33e2d51000c89a0c96bb2be2b2ddf3a9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6ce140878bfc4e1d92a46ebe39169f3c33e2d51000c89a0c96bb2be2b2ddf3a9", kill_on_drop: false }`
[INFO] [stdout] 6ce140878bfc4e1d92a46ebe39169f3c33e2d51000c89a0c96bb2be2b2ddf3a9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-51/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-51/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7645f69f3e9ff005b232fad2dd6fa362002574767165b3771bb698d0f3f16db0
[INFO] running `Command { std: "docker" "start" "-a" "7645f69f3e9ff005b232fad2dd6fa362002574767165b3771bb698d0f3f16db0", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling satsolver v1.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: type alias is never used: `Cnf`
[INFO] [stdout]  --> src/lexer.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | type Cnf = Vec<Vec<isize>>;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Lexer`
[INFO] [stdout]  --> src/lexer.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct Lexer;
[INFO] [stdout]   |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]  --> src/lexer.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 |     pub fn new(filename: &str) -> Cnf {
[INFO] [stdout]   |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `parse_line`
[INFO] [stdout]   --> src/lexer.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn parse_line(s: &str) -> Vec<isize> {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/solver.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub fn new(cnf: Cnf) -> Dpll {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `solver`
[INFO] [stdout]   --> src/solver.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 |     pub fn solver(self) -> Option<Self> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `unit_propagation`
[INFO] [stdout]   --> src/solver.rs:43:8
[INFO] [stdout]    |
[INFO] [stdout] 43 |     fn unit_propagation(self) -> Self {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `assign`
[INFO] [stdout]   --> src/solver.rs:50:8
[INFO] [stdout]    |
[INFO] [stdout] 50 |     fn assign(&self, lit: Literal) -> Self {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `retain_lit`
[INFO] [stdout]   --> src/solver.rs:64:4
[INFO] [stdout]    |
[INFO] [stdout] 64 | fn retain_lit(mut cl: Clause, lit: Literal) -> Clause {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `exists_empty_clause`
[INFO] [stdout]   --> src/solver.rs:70:8
[INFO] [stdout]    |
[INFO] [stdout] 70 |     fn exists_empty_clause(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_unit_literal`
[INFO] [stdout]   --> src/solver.rs:74:8
[INFO] [stdout]    |
[INFO] [stdout] 74 |     fn get_unit_literal(&self) -> Option<Literal> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `heuristic_select`
[INFO] [stdout]   --> src/solver.rs:81:8
[INFO] [stdout]    |
[INFO] [stdout] 81 |     fn heuristic_select(&self) -> Literal {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_empty`
[INFO] [stdout]   --> src/solver.rs:85:8
[INFO] [stdout]    |
[INFO] [stdout] 85 |     fn is_empty(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `Cnf`
[INFO] [stdout]  --> src/lexer.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | type Cnf = Vec<Vec<isize>>;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Lexer`
[INFO] [stdout]  --> src/lexer.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct Lexer;
[INFO] [stdout]   |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]  --> src/lexer.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 |     pub fn new(filename: &str) -> Cnf {
[INFO] [stdout]   |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `parse_line`
[INFO] [stdout]   --> src/lexer.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn parse_line(s: &str) -> Vec<isize> {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.28s
[INFO] running `Command { std: "docker" "inspect" "7645f69f3e9ff005b232fad2dd6fa362002574767165b3771bb698d0f3f16db0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7645f69f3e9ff005b232fad2dd6fa362002574767165b3771bb698d0f3f16db0", kill_on_drop: false }`
[INFO] [stdout] 7645f69f3e9ff005b232fad2dd6fa362002574767165b3771bb698d0f3f16db0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-51/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-51/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 0dbd57c5d4056cbcedcde074c8873ab23d517aae89e83a05ef4f31b1140be088
[INFO] running `Command { std: "docker" "start" "-a" "0dbd57c5d4056cbcedcde074c8873ab23d517aae89e83a05ef4f31b1140be088", kill_on_drop: false }`
[INFO] [stderr] warning: type alias is never used: `Cnf`
[INFO] [stderr]  --> src/lexer.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | type Cnf = Vec<Vec<isize>>;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Lexer`
[INFO] [stderr]  --> src/lexer.rs:6:12
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub struct Lexer;
[INFO] [stderr]   |            ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]  --> src/lexer.rs:8:12
[INFO] [stderr]   |
[INFO] [stderr] 8 |     pub fn new(filename: &str) -> Cnf {
[INFO] [stderr]   |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `parse_line`
[INFO] [stderr]   --> src/lexer.rs:35:8
[INFO] [stderr]    |
[INFO] [stderr] 35 |     fn parse_line(s: &str) -> Vec<isize> {
[INFO] [stderr]    |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/solver.rs:13:12
[INFO] [stderr]    |
[INFO] [stderr] 13 |     pub fn new(cnf: Cnf) -> Dpll {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `solver`
[INFO] [stderr]   --> src/solver.rs:20:12
[INFO] [stderr]    |
[INFO] [stderr] 20 |     pub fn solver(self) -> Option<Self> {
[INFO] [stderr]    |            ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `unit_propagation`
[INFO] [stderr]   --> src/solver.rs:43:8
[INFO] [stderr]    |
[INFO] [stderr] 43 |     fn unit_propagation(self) -> Self {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `assign`
[INFO] [stderr]   --> src/solver.rs:50:8
[INFO] [stderr]    |
[INFO] [stderr] 50 |     fn assign(&self, lit: Literal) -> Self {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `retain_lit`
[INFO] [stderr]   --> src/solver.rs:64:4
[INFO] [stderr]    |
[INFO] [stderr] 64 | fn retain_lit(mut cl: Clause, lit: Literal) -> Clause {
[INFO] [stderr]    |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `exists_empty_clause`
[INFO] [stderr]   --> src/solver.rs:70:8
[INFO] [stderr]    |
[INFO] [stderr] 70 |     fn exists_empty_clause(&self) -> bool {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get_unit_literal`
[INFO] [stderr]   --> src/solver.rs:74:8
[INFO] [stderr]    |
[INFO] [stderr] 74 |     fn get_unit_literal(&self) -> Option<Literal> {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `heuristic_select`
[INFO] [stderr]   --> src/solver.rs:81:8
[INFO] [stderr]    |
[INFO] [stderr] 81 |     fn heuristic_select(&self) -> Literal {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `is_empty`
[INFO] [stderr]   --> src/solver.rs:85:8
[INFO] [stderr]    |
[INFO] [stderr] 85 |     fn is_empty(&self) -> bool {
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `satsolver` (lib) generated 13 warnings
[INFO] [stderr] warning: `satsolver` (lib test) generated 4 warnings (4 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/satsolver-0a80b28517f7f269)
[INFO] [stdout] 
[INFO] [stdout] running 10 tests
[INFO] [stdout] test solver::assign_test ... ok
[INFO] [stdout] test solver::heuristic_select_test ... ok
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/satsolver-084845c7d7a1bead)
[INFO] [stdout] test solver::get_unit_literal_test ... ok
[INFO] [stdout] test solver::is_empty_test ... ok
[INFO] [stdout] test solver::solver_test_1 ... ok
[INFO] [stdout] test solver::exists_empty_clause_test ... ok
[INFO] [stdout] test solver::retain_lit_test ... ok
[INFO] [stdout] test solver::unit_propagation_test_1 ... ok
[INFO] [stdout] test solver::unit_propagation_test_2 ... ok
[INFO] [stdout] test solver::solver_test_2 ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 10 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 10 tests
[INFO] [stdout] test solver::exists_empty_clause_test ... ok
[INFO] [stdout] test solver::get_unit_literal_test ... ok
[INFO] [stdout] test solver::assign_test ... ok
[INFO] [stdout] test solver::heuristic_select_test ... ok
[INFO] [stdout] test solver::is_empty_test ... ok
[INFO] [stdout] test solver::retain_lit_test ... ok
[INFO] [stdout] test solver::solver_test_1 ... ok
[INFO] [stdout] test solver::solver_test_2 ... ok
[INFO] [stderr]    Doc-tests satsolver
[INFO] [stdout] test solver::unit_propagation_test_2 ... ok
[INFO] [stdout] test solver::unit_propagation_test_1 ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 10 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "0dbd57c5d4056cbcedcde074c8873ab23d517aae89e83a05ef4f31b1140be088", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0dbd57c5d4056cbcedcde074c8873ab23d517aae89e83a05ef4f31b1140be088", kill_on_drop: false }`
[INFO] [stdout] 0dbd57c5d4056cbcedcde074c8873ab23d517aae89e83a05ef4f31b1140be088