[INFO] cloning repository https://github.com/sjrsjz/Simple-Constraint-System
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sjrsjz/Simple-Constraint-System" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsjrsjz%2FSimple-Constraint-System", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsjrsjz%2FSimple-Constraint-System'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 09821b77cd1f08b5d711403f7cdf003fa07e2ad2
[INFO] checking sjrsjz/Simple-Constraint-System against 895980e0290783bb09b1ccf1b11f14eb09b10430 for pr-160186
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsjrsjz%2FSimple-Constraint-System" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/sjrsjz/Simple-Constraint-System
[INFO] finished tweaking git repo https://github.com/sjrsjz/Simple-Constraint-System
[INFO] tweaked toml for git repo https://github.com/sjrsjz/Simple-Constraint-System written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/sjrsjz/Simple-Constraint-System on toolchain 895980e0290783bb09b1ccf1b11f14eb09b10430
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+895980e0290783bb09b1ccf1b11f14eb09b10430" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/sjrsjz/Simple-Constraint-System 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" "+895980e0290783bb09b1ccf1b11f14eb09b10430" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:77db811e55d90add9212f6832c23229e3de5f1c1f9905e8cb07319ea15df73ac" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] f132b849f949e213c26b3964f2d10d1a64bcac0129b19414d2add6f346fbb55f
[INFO] running `Command { std: "docker" "start" "f132b849f949e213c26b3964f2d10d1a64bcac0129b19414d2add6f346fbb55f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f132b849f949e213c26b3964f2d10d1a64bcac0129b19414d2add6f346fbb55f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "f132b849f949e213c26b3964f2d10d1a64bcac0129b19414d2add6f346fbb55f" "/opt/rustwide/cargo-home/bin/cargo" "+895980e0290783bb09b1ccf1b11f14eb09b10430" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f132b849f949e213c26b3964f2d10d1a64bcac0129b19414d2add6f346fbb55f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "f132b849f949e213c26b3964f2d10d1a64bcac0129b19414d2add6f346fbb55f" "/opt/rustwide/cargo-home/bin/cargo" "+895980e0290783bb09b1ccf1b11f14eb09b10430" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]     Checking constraint-system v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variant `F` is never constructed
[INFO] [stdout]   --> src/constraint.rs:36:5
[INFO] [stdout]    |
[INFO] [stdout] 34 | pub enum ConstraintNode {
[INFO] [stdout]    |          -------------- variant in this enum
[INFO] [stdout] 35 |     T,                                              // 顶点约束，表示任意值
[INFO] [stdout] 36 |     F,                                              // 假约束，表示不可能的值
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ConstraintNode` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `refine` is never used
[INFO] [stdout]    --> src/constraint.rs:127:12
[INFO] [stdout]     |
[INFO] [stdout] 113 | impl Constraint {
[INFO] [stdout]     | --------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 127 |     pub fn refine(&self, v: &Self) -> Self {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `AtomicConstraint` is never used
[INFO] [stdout]  --> src/constraint.rs:9:10
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub enum AtomicConstraint {
[INFO] [stdout]   |          ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `ConstraintNode` is never used
[INFO] [stdout]   --> src/constraint.rs:34:10
[INFO] [stdout]    |
[INFO] [stdout] 34 | pub enum ConstraintNode {
[INFO] [stdout]    |          ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Constraint` is never constructed
[INFO] [stdout]   --> src/constraint.rs:80:12
[INFO] [stdout]    |
[INFO] [stdout] 80 | pub struct Constraint {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `add_node`, `get_node`, and `entry` are never used
[INFO] [stdout]    --> src/constraint.rs:86:12
[INFO] [stdout]     |
[INFO] [stdout]  85 | impl Constraint {
[INFO] [stdout]     | --------------- associated items in this implementation
[INFO] [stdout]  86 |     pub fn new(entry: String) -> Self {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout]  93 |     pub fn add_node(&mut self, name: String, node: ConstraintNode) {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 104 |     pub fn get_node(&self, name: &str) -> Option<&ConstraintNode> {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 108 |     pub fn entry(&self) -> &String {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `super_of`, `refine`, `check_subsumption`, and `check_subsumption_inner` are never used
[INFO] [stdout]    --> src/constraint.rs:114:12
[INFO] [stdout]     |
[INFO] [stdout] 113 | impl Constraint {
[INFO] [stdout]     | --------------- associated items in this implementation
[INFO] [stdout] 114 |     pub fn super_of(&self, other: &Self) -> bool {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 127 |     pub fn refine(&self, v: &Self) -> Self {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 139 |     fn check_subsumption(
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 162 |     fn check_subsumption_inner(
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `PrettyFormatter` is never constructed
[INFO] [stdout]    --> src/constraint.rs:298:8
[INFO] [stdout]     |
[INFO] [stdout] 298 | struct PrettyFormatter<'a> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `format_node` are never used
[INFO] [stdout]    --> src/constraint.rs:305:8
[INFO] [stdout]     |
[INFO] [stdout] 304 | impl<'a> PrettyFormatter<'a> {
[INFO] [stdout]     | ---------------------------- associated items in this implementation
[INFO] [stdout] 305 |     fn new(constraint: &'a Constraint) -> Self {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 313 |     fn format_node(&mut self, f: &mut fmt::Formatter<'_>, node: &ConstraintNode) -> fmt::Result {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.24s
[INFO] running `Command { std: "docker" "inspect" "f132b849f949e213c26b3964f2d10d1a64bcac0129b19414d2add6f346fbb55f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f132b849f949e213c26b3964f2d10d1a64bcac0129b19414d2add6f346fbb55f", kill_on_drop: false }`
[INFO] [stdout] f132b849f949e213c26b3964f2d10d1a64bcac0129b19414d2add6f346fbb55f
