[INFO] cloning repository https://github.com/rainbowbismuth/gbcc
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/rainbowbismuth/gbcc" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frainbowbismuth%2Fgbcc", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frainbowbismuth%2Fgbcc'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 205245f3d5f9ddaaf1e7e531211c216a3ea1700e
[INFO] testing rainbowbismuth/gbcc against 1.59.0 for beta-1.60-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frainbowbismuth%2Fgbcc" "/workspace/builds/worker-44/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-44/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/rainbowbismuth/gbcc on toolchain 1.59.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/rainbowbismuth/gbcc
[INFO] finished tweaking git repo https://github.com/rainbowbismuth/gbcc
[INFO] tweaked toml for git repo https://github.com/rainbowbismuth/gbcc written to /workspace/builds/worker-44/source/Cargo.toml
[INFO] crate git repo https://github.com/rainbowbismuth/gbcc already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "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-44/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-44/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e9e1915f62cae0b5c08f95581ba3cb67d579393b2e547dc7f679f3a08e145c89
[INFO] running `Command { std: "docker" "start" "-a" "e9e1915f62cae0b5c08f95581ba3cb67d579393b2e547dc7f679f3a08e145c89", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e9e1915f62cae0b5c08f95581ba3cb67d579393b2e547dc7f679f3a08e145c89", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e9e1915f62cae0b5c08f95581ba3cb67d579393b2e547dc7f679f3a08e145c89", kill_on_drop: false }`
[INFO] [stdout] e9e1915f62cae0b5c08f95581ba3cb67d579393b2e547dc7f679f3a08e145c89
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-44/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-44/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] aa3005ccd8f10c6f967aac4b0710a1f68b4143db3ea5ec4af19b76331d1b209f
[INFO] running `Command { std: "docker" "start" "-a" "aa3005ccd8f10c6f967aac4b0710a1f68b4143db3ea5ec4af19b76331d1b209f", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling gbcc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `fnv::FnvHashSet`
[INFO] [stdout]  --> src/dataflow/dominator.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use fnv::FnvHashSet;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `label`
[INFO] [stdout]   --> src/dataflow/dominator.rs:17:38
[INFO] [stdout]    |
[INFO] [stdout] 17 |     fn join(&mut self, other: &Self, label: Label) -> bool {
[INFO] [stdout]    |                                      ^^^^^ help: if this is intentional, prefix it with an underscore: `_label`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `label`
[INFO] [stdout]   --> src/dataflow/dominator.rs:44:9
[INFO] [stdout]    |
[INFO] [stdout] 44 |         label: Label,
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_label`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `label`
[INFO] [stdout]   --> src/dataflow/graph.rs:94:39
[INFO] [stdout]    |
[INFO] [stdout] 94 |     pub fn direct_predecessors(&self, label: Label) -> Vec<Label> {
[INFO] [stdout]    |                                       ^^^^^ help: if this is intentional, prefix it with an underscore: `_label`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `AnalyzeInstructionBackward`
[INFO] [stdout]  --> src/dataflow/backward_analysis.rs:7:12
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub struct AnalyzeInstructionBackward<'a, F> {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/dataflow/backward_analysis.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 |     fn new(fact: &'a mut F) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `fact`
[INFO] [stdout]   --> src/dataflow/backward_analysis.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 16 |     pub fn fact(&self) -> &F {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `fact_mut`
[INFO] [stdout]   --> src/dataflow/backward_analysis.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 |     pub fn fact_mut(self) -> &'a mut F {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `replace`
[INFO] [stdout]   --> src/dataflow/backward_analysis.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 24 |     pub fn replace<L: Language>(
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `replace_many`
[INFO] [stdout]   --> src/dataflow/backward_analysis.rs:31:12
[INFO] [stdout]    |
[INFO] [stdout] 31 |     pub fn replace_many<L: Language>(
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `replace_with_graph`
[INFO] [stdout]   --> src/dataflow/backward_analysis.rs:38:12
[INFO] [stdout]    |
[INFO] [stdout] 38 |     pub fn replace_with_graph<L: Language>(
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `AnalyzeExitBackward`
[INFO] [stdout]   --> src/dataflow/backward_analysis.rs:48:12
[INFO] [stdout]    |
[INFO] [stdout] 48 | pub struct AnalyzeExitBackward<'a, F> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/dataflow/backward_analysis.rs:53:8
[INFO] [stdout]    |
[INFO] [stdout] 53 |     fn new(fact: &'a mut F) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `fact`
[INFO] [stdout]   --> src/dataflow/backward_analysis.rs:57:12
[INFO] [stdout]    |
[INFO] [stdout] 57 |     pub fn fact(&self) -> &F {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `fact_mut`
[INFO] [stdout]   --> src/dataflow/backward_analysis.rs:61:12
[INFO] [stdout]    |
[INFO] [stdout] 61 |     pub fn fact_mut(self) -> &'a mut F {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `replace`
[INFO] [stdout]   --> src/dataflow/backward_analysis.rs:65:12
[INFO] [stdout]    |
[INFO] [stdout] 65 |     pub fn replace<L: Language>(self, exit: L::Exit) -> RewriteExitBackward<L> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `replace_many`
[INFO] [stdout]   --> src/dataflow/backward_analysis.rs:69:12
[INFO] [stdout]    |
[INFO] [stdout] 69 |     pub fn replace_many<L: Language>(
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `replace_with_graph`
[INFO] [stdout]   --> src/dataflow/backward_analysis.rs:77:12
[INFO] [stdout]    |
[INFO] [stdout] 77 |     pub fn replace_with_graph<L: Language>(
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Single`
[INFO] [stdout]   --> src/dataflow/backward_analysis.rs:92:5
[INFO] [stdout]    |
[INFO] [stdout] 92 |     Single(L::Instruction),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Multiple`
[INFO] [stdout]   --> src/dataflow/backward_analysis.rs:95:5
[INFO] [stdout]    |
[INFO] [stdout] 95 |     Multiple(Vec<L::Instruction>),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Graph`
[INFO] [stdout]    --> src/dataflow/backward_analysis.rs:101:5
[INFO] [stdout]     |
[INFO] [stdout] 101 |     Graph(L::Exit, Graph<L>, L::Entry),
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Single`
[INFO] [stdout]    --> src/dataflow/backward_analysis.rs:110:5
[INFO] [stdout]     |
[INFO] [stdout] 110 |     Single(L::Exit),
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Extend`
[INFO] [stdout]    --> src/dataflow/backward_analysis.rs:113:5
[INFO] [stdout]     |
[INFO] [stdout] 113 |     Extend(Vec<L::Instruction>, L::Exit),
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Graph`
[INFO] [stdout]    --> src/dataflow/backward_analysis.rs:118:5
[INFO] [stdout]     |
[INFO] [stdout] 118 |     Graph(L::Exit, Graph<L>),
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `backward_analysis`
[INFO] [stdout]    --> src/dataflow/backward_analysis.rs:147:8
[INFO] [stdout]     |
[INFO] [stdout] 147 | pub fn backward_analysis<L, A, F>(analysis: &mut A, graph: &Graph<L>, entry: Label) -> FactBase<F>
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `fixed_point_backward_graph`
[INFO] [stdout]    --> src/dataflow/backward_analysis.rs:158:4
[INFO] [stdout]     |
[INFO] [stdout] 158 | fn fixed_point_backward_graph<L, A, F>(
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `fixed_point_backward_block`
[INFO] [stdout]    --> src/dataflow/backward_analysis.rs:194:4
[INFO] [stdout]     |
[INFO] [stdout] 194 | fn fixed_point_backward_block<L, A, F>(
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `fact`
[INFO] [stdout]  --> src/dataflow/forward_analysis.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     fact: &'a mut F,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/dataflow/forward_analysis.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 |     fn new(fact: &'a mut F) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `fact`
[INFO] [stdout]   --> src/dataflow/forward_analysis.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 16 |     pub fn fact(&self) -> &F {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `fact_mut`
[INFO] [stdout]   --> src/dataflow/forward_analysis.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 |     pub fn fact_mut(self) -> &'a mut F {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `replace`
[INFO] [stdout]   --> src/dataflow/forward_analysis.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 24 |     pub fn replace<L: Language>(self, instruction: L::Instruction) -> RewriteInstruction<L> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `replace_many`
[INFO] [stdout]   --> src/dataflow/forward_analysis.rs:28:12
[INFO] [stdout]    |
[INFO] [stdout] 28 |     pub fn replace_many<L: Language>(
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `replace_with_graph`
[INFO] [stdout]   --> src/dataflow/forward_analysis.rs:35:12
[INFO] [stdout]    |
[INFO] [stdout] 35 |     pub fn replace_with_graph<L: Language>(
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Single`
[INFO] [stdout]   --> src/dataflow/forward_analysis.rs:51:5
[INFO] [stdout]    |
[INFO] [stdout] 51 |     Single(L::Instruction),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Multiple`
[INFO] [stdout]   --> src/dataflow/forward_analysis.rs:54:5
[INFO] [stdout]    |
[INFO] [stdout] 54 |     Multiple(Vec<L::Instruction>),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Graph`
[INFO] [stdout]   --> src/dataflow/forward_analysis.rs:60:5
[INFO] [stdout]    |
[INFO] [stdout] 60 |     Graph(L::Exit, Graph<L>, L::Entry),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Single`
[INFO] [stdout]   --> src/dataflow/forward_analysis.rs:68:5
[INFO] [stdout]    |
[INFO] [stdout] 68 |     Single(L::Exit),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Extend`
[INFO] [stdout]   --> src/dataflow/forward_analysis.rs:71:5
[INFO] [stdout]    |
[INFO] [stdout] 71 |     Extend(Vec<L::Instruction>, L::Exit),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Graph`
[INFO] [stdout]   --> src/dataflow/forward_analysis.rs:76:5
[INFO] [stdout]    |
[INFO] [stdout] 76 |     Graph(L::Exit, Graph<L>),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `forward_analysis`
[INFO] [stdout]    --> src/dataflow/forward_analysis.rs:107:8
[INFO] [stdout]     |
[INFO] [stdout] 107 | pub fn forward_analysis<L, A, F>(
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `fixed_point_forward_graph`
[INFO] [stdout]    --> src/dataflow/forward_analysis.rs:126:4
[INFO] [stdout]     |
[INFO] [stdout] 126 | fn fixed_point_forward_graph<L, A, F>(
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `fixed_point_forward_block`
[INFO] [stdout]    --> src/dataflow/forward_analysis.rs:161:4
[INFO] [stdout]     |
[INFO] [stdout] 161 | fn fixed_point_forward_block<L, A, F>(
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/dataflow/graph.rs:40:12
[INFO] [stdout]    |
[INFO] [stdout] 40 |     pub fn new(entry: L::Entry, code: Vec<L::Instruction>, exit: L::Exit) -> BasicBlock<L> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `label`
[INFO] [stdout]   --> src/dataflow/graph.rs:44:12
[INFO] [stdout]    |
[INFO] [stdout] 44 |     pub fn label(&self) -> Label {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `successors`
[INFO] [stdout]   --> src/dataflow/graph.rs:48:12
[INFO] [stdout]    |
[INFO] [stdout] 48 |     pub fn successors(&self) -> Vec<Label> {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_blocks`
[INFO] [stdout]   --> src/dataflow/graph.rs:59:12
[INFO] [stdout]    |
[INFO] [stdout] 59 |     pub fn from_blocks(blocks: Vec<BasicBlock<L>>) -> Graph<L> {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `post_order_traversal`
[INFO] [stdout]   --> src/dataflow/graph.rs:68:12
[INFO] [stdout]    |
[INFO] [stdout] 68 |     pub fn post_order_traversal(&self, entry: Label) -> Vec<Label> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `go`
[INFO] [stdout]   --> src/dataflow/graph.rs:69:12
[INFO] [stdout]    |
[INFO] [stdout] 69 |         fn go<L: Language>(
[INFO] [stdout]    |            ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `contains`
[INFO] [stdout]   --> src/dataflow/graph.rs:90:12
[INFO] [stdout]    |
[INFO] [stdout] 90 |     pub fn contains(&self, label: Label) -> bool {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `direct_predecessors`
[INFO] [stdout]   --> src/dataflow/graph.rs:94:12
[INFO] [stdout]    |
[INFO] [stdout] 94 |     pub fn direct_predecessors(&self, label: Label) -> Vec<Label> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 51 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.31s
[INFO] running `Command { std: "docker" "inspect" "aa3005ccd8f10c6f967aac4b0710a1f68b4143db3ea5ec4af19b76331d1b209f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aa3005ccd8f10c6f967aac4b0710a1f68b4143db3ea5ec4af19b76331d1b209f", kill_on_drop: false }`
[INFO] [stdout] aa3005ccd8f10c6f967aac4b0710a1f68b4143db3ea5ec4af19b76331d1b209f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-44/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-44/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9024a6ba70376c3ad8ac9ff857819b8c70418d9b9ba6ee679d61f1d38fda97a1
[INFO] running `Command { std: "docker" "start" "-a" "9024a6ba70376c3ad8ac9ff857819b8c70418d9b9ba6ee679d61f1d38fda97a1", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling gbcc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `fnv::FnvHashSet`
[INFO] [stdout]  --> src/dataflow/dominator.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use fnv::FnvHashSet;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `label`
[INFO] [stdout]    --> src/main.rs:161:13
[INFO] [stdout]     |
[INFO] [stdout] 161 |             label: Label,
[INFO] [stdout]     |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_label`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `label`
[INFO] [stdout]    --> src/main.rs:193:13
[INFO] [stdout]     |
[INFO] [stdout] 193 |             label: Label,
[INFO] [stdout]     |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_label`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `label`
[INFO] [stdout]   --> src/dataflow/dominator.rs:17:38
[INFO] [stdout]    |
[INFO] [stdout] 17 |     fn join(&mut self, other: &Self, label: Label) -> bool {
[INFO] [stdout]    |                                      ^^^^^ help: if this is intentional, prefix it with an underscore: `_label`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `label`
[INFO] [stdout]   --> src/dataflow/dominator.rs:44:9
[INFO] [stdout]    |
[INFO] [stdout] 44 |         label: Label,
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_label`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `label`
[INFO] [stdout]   --> src/dataflow/graph.rs:94:39
[INFO] [stdout]    |
[INFO] [stdout] 94 |     pub fn direct_predecessors(&self, label: Label) -> Vec<Label> {
[INFO] [stdout]    |                                       ^^^^^ help: if this is intentional, prefix it with an underscore: `_label`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `AnalyzeInstructionBackward`
[INFO] [stdout]  --> src/dataflow/backward_analysis.rs:7:12
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub struct AnalyzeInstructionBackward<'a, F> {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/dataflow/backward_analysis.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 |     fn new(fact: &'a mut F) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `fact`
[INFO] [stdout]   --> src/dataflow/backward_analysis.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 16 |     pub fn fact(&self) -> &F {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `fact_mut`
[INFO] [stdout]   --> src/dataflow/backward_analysis.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 |     pub fn fact_mut(self) -> &'a mut F {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `replace`
[INFO] [stdout]   --> src/dataflow/backward_analysis.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 24 |     pub fn replace<L: Language>(
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `replace_many`
[INFO] [stdout]   --> src/dataflow/backward_analysis.rs:31:12
[INFO] [stdout]    |
[INFO] [stdout] 31 |     pub fn replace_many<L: Language>(
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `replace_with_graph`
[INFO] [stdout]   --> src/dataflow/backward_analysis.rs:38:12
[INFO] [stdout]    |
[INFO] [stdout] 38 |     pub fn replace_with_graph<L: Language>(
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `AnalyzeExitBackward`
[INFO] [stdout]   --> src/dataflow/backward_analysis.rs:48:12
[INFO] [stdout]    |
[INFO] [stdout] 48 | pub struct AnalyzeExitBackward<'a, F> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/dataflow/backward_analysis.rs:53:8
[INFO] [stdout]    |
[INFO] [stdout] 53 |     fn new(fact: &'a mut F) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `fact`
[INFO] [stdout]   --> src/dataflow/backward_analysis.rs:57:12
[INFO] [stdout]    |
[INFO] [stdout] 57 |     pub fn fact(&self) -> &F {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `fact_mut`
[INFO] [stdout]   --> src/dataflow/backward_analysis.rs:61:12
[INFO] [stdout]    |
[INFO] [stdout] 61 |     pub fn fact_mut(self) -> &'a mut F {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `replace`
[INFO] [stdout]   --> src/dataflow/backward_analysis.rs:65:12
[INFO] [stdout]    |
[INFO] [stdout] 65 |     pub fn replace<L: Language>(self, exit: L::Exit) -> RewriteExitBackward<L> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `replace_many`
[INFO] [stdout]   --> src/dataflow/backward_analysis.rs:69:12
[INFO] [stdout]    |
[INFO] [stdout] 69 |     pub fn replace_many<L: Language>(
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `replace_with_graph`
[INFO] [stdout]   --> src/dataflow/backward_analysis.rs:77:12
[INFO] [stdout]    |
[INFO] [stdout] 77 |     pub fn replace_with_graph<L: Language>(
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Single`
[INFO] [stdout]   --> src/dataflow/backward_analysis.rs:92:5
[INFO] [stdout]    |
[INFO] [stdout] 92 |     Single(L::Instruction),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Multiple`
[INFO] [stdout]   --> src/dataflow/backward_analysis.rs:95:5
[INFO] [stdout]    |
[INFO] [stdout] 95 |     Multiple(Vec<L::Instruction>),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Graph`
[INFO] [stdout]    --> src/dataflow/backward_analysis.rs:101:5
[INFO] [stdout]     |
[INFO] [stdout] 101 |     Graph(L::Exit, Graph<L>, L::Entry),
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Single`
[INFO] [stdout]    --> src/dataflow/backward_analysis.rs:110:5
[INFO] [stdout]     |
[INFO] [stdout] 110 |     Single(L::Exit),
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Extend`
[INFO] [stdout]    --> src/dataflow/backward_analysis.rs:113:5
[INFO] [stdout]     |
[INFO] [stdout] 113 |     Extend(Vec<L::Instruction>, L::Exit),
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Graph`
[INFO] [stdout]    --> src/dataflow/backward_analysis.rs:118:5
[INFO] [stdout]     |
[INFO] [stdout] 118 |     Graph(L::Exit, Graph<L>),
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `backward_analysis`
[INFO] [stdout]    --> src/dataflow/backward_analysis.rs:147:8
[INFO] [stdout]     |
[INFO] [stdout] 147 | pub fn backward_analysis<L, A, F>(analysis: &mut A, graph: &Graph<L>, entry: Label) -> FactBase<F>
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `fixed_point_backward_graph`
[INFO] [stdout]    --> src/dataflow/backward_analysis.rs:158:4
[INFO] [stdout]     |
[INFO] [stdout] 158 | fn fixed_point_backward_graph<L, A, F>(
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `fixed_point_backward_block`
[INFO] [stdout]    --> src/dataflow/backward_analysis.rs:194:4
[INFO] [stdout]     |
[INFO] [stdout] 194 | fn fixed_point_backward_block<L, A, F>(
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `replace_many`
[INFO] [stdout]   --> src/dataflow/forward_analysis.rs:28:12
[INFO] [stdout]    |
[INFO] [stdout] 28 |     pub fn replace_many<L: Language>(
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `replace_with_graph`
[INFO] [stdout]   --> src/dataflow/forward_analysis.rs:35:12
[INFO] [stdout]    |
[INFO] [stdout] 35 |     pub fn replace_with_graph<L: Language>(
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Multiple`
[INFO] [stdout]   --> src/dataflow/forward_analysis.rs:54:5
[INFO] [stdout]    |
[INFO] [stdout] 54 |     Multiple(Vec<L::Instruction>),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Graph`
[INFO] [stdout]   --> src/dataflow/forward_analysis.rs:60:5
[INFO] [stdout]    |
[INFO] [stdout] 60 |     Graph(L::Exit, Graph<L>, L::Entry),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Single`
[INFO] [stdout]   --> src/dataflow/forward_analysis.rs:68:5
[INFO] [stdout]    |
[INFO] [stdout] 68 |     Single(L::Exit),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Extend`
[INFO] [stdout]   --> src/dataflow/forward_analysis.rs:71:5
[INFO] [stdout]    |
[INFO] [stdout] 71 |     Extend(Vec<L::Instruction>, L::Exit),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Graph`
[INFO] [stdout]   --> src/dataflow/forward_analysis.rs:76:5
[INFO] [stdout]    |
[INFO] [stdout] 76 |     Graph(L::Exit, Graph<L>),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `direct_predecessors`
[INFO] [stdout]   --> src/dataflow/graph.rs:94:12
[INFO] [stdout]    |
[INFO] [stdout] 94 |     pub fn direct_predecessors(&self, label: Label) -> Vec<Label> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Add`
[INFO] [stdout]   --> src/main.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |         Add,
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `And`
[INFO] [stdout]   --> src/main.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |         And,
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Or`
[INFO] [stdout]   --> src/main.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |         Or,
[INFO] [stdout]    |         ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Neq`
[INFO] [stdout]   --> src/main.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |         Neq,
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Lt`
[INFO] [stdout]   --> src/main.rs:28:9
[INFO] [stdout]    |
[INFO] [stdout] 28 |         Lt,
[INFO] [stdout]    |         ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Lte`
[INFO] [stdout]   --> src/main.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 |         Lte,
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 43 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.92s
[INFO] running `Command { std: "docker" "inspect" "9024a6ba70376c3ad8ac9ff857819b8c70418d9b9ba6ee679d61f1d38fda97a1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9024a6ba70376c3ad8ac9ff857819b8c70418d9b9ba6ee679d61f1d38fda97a1", kill_on_drop: false }`
[INFO] [stdout] 9024a6ba70376c3ad8ac9ff857819b8c70418d9b9ba6ee679d61f1d38fda97a1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-44/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-44/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] d40f17d50b2cc3e84defd3510d734b4c050a05bea3367f266fe58f6d72e3e763
[INFO] running `Command { std: "docker" "start" "-a" "d40f17d50b2cc3e84defd3510d734b4c050a05bea3367f266fe58f6d72e3e763", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: unused import: `fnv::FnvHashSet`
[INFO] [stderr]  --> src/dataflow/dominator.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use fnv::FnvHashSet;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `label`
[INFO] [stderr]    --> src/main.rs:161:13
[INFO] [stderr]     |
[INFO] [stderr] 161 |             label: Label,
[INFO] [stderr]     |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_label`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `label`
[INFO] [stderr]    --> src/main.rs:193:13
[INFO] [stderr]     |
[INFO] [stderr] 193 |             label: Label,
[INFO] [stderr]     |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_label`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `label`
[INFO] [stderr]   --> src/dataflow/dominator.rs:17:38
[INFO] [stderr]    |
[INFO] [stderr] 17 |     fn join(&mut self, other: &Self, label: Label) -> bool {
[INFO] [stderr]    |                                      ^^^^^ help: if this is intentional, prefix it with an underscore: `_label`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `label`
[INFO] [stderr]   --> src/dataflow/dominator.rs:44:9
[INFO] [stderr]    |
[INFO] [stderr] 44 |         label: Label,
[INFO] [stderr]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_label`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `label`
[INFO] [stderr]   --> src/dataflow/graph.rs:94:39
[INFO] [stderr]    |
[INFO] [stderr] 94 |     pub fn direct_predecessors(&self, label: Label) -> Vec<Label> {
[INFO] [stderr]    |                                       ^^^^^ help: if this is intentional, prefix it with an underscore: `_label`
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `AnalyzeInstructionBackward`
[INFO] [stderr]  --> src/dataflow/backward_analysis.rs:7:12
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub struct AnalyzeInstructionBackward<'a, F> {
[INFO] [stderr]   |            ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/dataflow/backward_analysis.rs:12:8
[INFO] [stderr]    |
[INFO] [stderr] 12 |     fn new(fact: &'a mut F) -> Self {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `fact`
[INFO] [stderr]   --> src/dataflow/backward_analysis.rs:16:12
[INFO] [stderr]    |
[INFO] [stderr] 16 |     pub fn fact(&self) -> &F {
[INFO] [stderr]    |            ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `fact_mut`
[INFO] [stderr]   --> src/dataflow/backward_analysis.rs:20:12
[INFO] [stderr]    |
[INFO] [stderr] 20 |     pub fn fact_mut(self) -> &'a mut F {
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `replace`
[INFO] [stderr]   --> src/dataflow/backward_analysis.rs:24:12
[INFO] [stderr]    |
[INFO] [stderr] 24 |     pub fn replace<L: Language>(
[INFO] [stderr]    |            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `replace_many`
[INFO] [stderr]   --> src/dataflow/backward_analysis.rs:31:12
[INFO] [stderr]    |
[INFO] [stderr] 31 |     pub fn replace_many<L: Language>(
[INFO] [stderr]    |            ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `replace_with_graph`
[INFO] [stderr]   --> src/dataflow/backward_analysis.rs:38:12
[INFO] [stderr]    |
[INFO] [stderr] 38 |     pub fn replace_with_graph<L: Language>(
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `AnalyzeExitBackward`
[INFO] [stderr]   --> src/dataflow/backward_analysis.rs:48:12
[INFO] [stderr]    |
[INFO] [stderr] 48 | pub struct AnalyzeExitBackward<'a, F> {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/dataflow/backward_analysis.rs:53:8
[INFO] [stderr]    |
[INFO] [stderr] 53 |     fn new(fact: &'a mut F) -> Self {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `fact`
[INFO] [stderr]   --> src/dataflow/backward_analysis.rs:57:12
[INFO] [stderr]    |
[INFO] [stderr] 57 |     pub fn fact(&self) -> &F {
[INFO] [stderr]    |            ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `fact_mut`
[INFO] [stderr]   --> src/dataflow/backward_analysis.rs:61:12
[INFO] [stderr]    |
[INFO] [stderr] 61 |     pub fn fact_mut(self) -> &'a mut F {
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `replace`
[INFO] [stderr]   --> src/dataflow/backward_analysis.rs:65:12
[INFO] [stderr]    |
[INFO] [stderr] 65 |     pub fn replace<L: Language>(self, exit: L::Exit) -> RewriteExitBackward<L> {
[INFO] [stderr]    |            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `replace_many`
[INFO] [stderr]   --> src/dataflow/backward_analysis.rs:69:12
[INFO] [stderr]    |
[INFO] [stderr] 69 |     pub fn replace_many<L: Language>(
[INFO] [stderr]    |            ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `replace_with_graph`
[INFO] [stderr]   --> src/dataflow/backward_analysis.rs:77:12
[INFO] [stderr]    |
[INFO] [stderr] 77 |     pub fn replace_with_graph<L: Language>(
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Single`
[INFO] [stderr]   --> src/dataflow/backward_analysis.rs:92:5
[INFO] [stderr]    |
[INFO] [stderr] 92 |     Single(L::Instruction),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Multiple`
[INFO] [stderr]   --> src/dataflow/backward_analysis.rs:95:5
[INFO] [stderr]    |
[INFO] [stderr] 95 |     Multiple(Vec<L::Instruction>),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Graph`
[INFO] [stderr]    --> src/dataflow/backward_analysis.rs:101:5
[INFO] [stderr]     |
[INFO] [stderr] 101 |     Graph(L::Exit, Graph<L>, L::Entry),
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Single`
[INFO] [stderr]    --> src/dataflow/backward_analysis.rs:110:5
[INFO] [stderr]     |
[INFO] [stderr] 110 |     Single(L::Exit),
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Extend`
[INFO] [stderr]    --> src/dataflow/backward_analysis.rs:113:5
[INFO] [stderr]     |
[INFO] [stderr] 113 |     Extend(Vec<L::Instruction>, L::Exit),
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Graph`
[INFO] [stderr]    --> src/dataflow/backward_analysis.rs:118:5
[INFO] [stderr]     |
[INFO] [stderr] 118 |     Graph(L::Exit, Graph<L>),
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `backward_analysis`
[INFO] [stderr]    --> src/dataflow/backward_analysis.rs:147:8
[INFO] [stderr]     |
[INFO] [stderr] 147 | pub fn backward_analysis<L, A, F>(analysis: &mut A, graph: &Graph<L>, entry: Label) -> FactBase<F>
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fixed_point_backward_graph`
[INFO] [stderr]    --> src/dataflow/backward_analysis.rs:158:4
[INFO] [stderr]     |
[INFO] [stderr] 158 | fn fixed_point_backward_graph<L, A, F>(
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fixed_point_backward_block`
[INFO] [stderr]    --> src/dataflow/backward_analysis.rs:194:4
[INFO] [stderr]     |
[INFO] [stderr] 194 | fn fixed_point_backward_block<L, A, F>(
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `replace_many`
[INFO] [stderr]   --> src/dataflow/forward_analysis.rs:28:12
[INFO] [stderr]    |
[INFO] [stderr] 28 |     pub fn replace_many<L: Language>(
[INFO] [stderr]    |            ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `replace_with_graph`
[INFO] [stderr]   --> src/dataflow/forward_analysis.rs:35:12
[INFO] [stderr]    |
[INFO] [stderr] 35 |     pub fn replace_with_graph<L: Language>(
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Multiple`
[INFO] [stderr]   --> src/dataflow/forward_analysis.rs:54:5
[INFO] [stderr]    |
[INFO] [stderr] 54 |     Multiple(Vec<L::Instruction>),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Graph`
[INFO] [stderr]   --> src/dataflow/forward_analysis.rs:60:5
[INFO] [stderr]    |
[INFO] [stderr] 60 |     Graph(L::Exit, Graph<L>, L::Entry),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Single`
[INFO] [stderr]   --> src/dataflow/forward_analysis.rs:68:5
[INFO] [stderr]    |
[INFO] [stderr] 68 |     Single(L::Exit),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Extend`
[INFO] [stderr]   --> src/dataflow/forward_analysis.rs:71:5
[INFO] [stderr]    |
[INFO] [stderr] 71 |     Extend(Vec<L::Instruction>, L::Exit),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Graph`
[INFO] [stderr]   --> src/dataflow/forward_analysis.rs:76:5
[INFO] [stderr]    |
[INFO] [stderr] 76 |     Graph(L::Exit, Graph<L>),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `direct_predecessors`
[INFO] [stderr]   --> src/dataflow/graph.rs:94:12
[INFO] [stderr]    |
[INFO] [stderr] 94 |     pub fn direct_predecessors(&self, label: Label) -> Vec<Label> {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Add`
[INFO] [stderr]   --> src/main.rs:18:9
[INFO] [stderr]    |
[INFO] [stderr] 18 |         Add,
[INFO] [stderr]    |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `And`
[INFO] [stderr]   --> src/main.rs:20:9
[INFO] [stderr]    |
[INFO] [stderr] 20 |         And,
[INFO] [stderr]    |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Or`
[INFO] [stderr]   --> src/main.rs:21:9
[INFO] [stderr]    |
[INFO] [stderr] 21 |         Or,
[INFO] [stderr]    |         ^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Neq`
[INFO] [stderr]   --> src/main.rs:27:9
[INFO] [stderr]    |
[INFO] [stderr] 27 |         Neq,
[INFO] [stderr]    |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Lt`
[INFO] [stderr]   --> src/main.rs:28:9
[INFO] [stderr]    |
[INFO] [stderr] 28 |         Lt,
[INFO] [stderr]    |         ^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Lte`
[INFO] [stderr]   --> src/main.rs:29:9
[INFO] [stderr]    |
[INFO] [stderr] 29 |         Lte,
[INFO] [stderr]    |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `gbcc` (bin "gbcc" test) generated 43 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 3.07s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/gbcc-a6cfce68fe037068)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test test::constant_test ... ok
[INFO] [stdout] test test::dominator_test ... 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" "d40f17d50b2cc3e84defd3510d734b4c050a05bea3367f266fe58f6d72e3e763", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d40f17d50b2cc3e84defd3510d734b4c050a05bea3367f266fe58f6d72e3e763", kill_on_drop: false }`
[INFO] [stdout] d40f17d50b2cc3e84defd3510d734b4c050a05bea3367f266fe58f6d72e3e763