[INFO] updating cached repository rainbowbismuth/gbcc
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/rainbowbismuth/gbcc
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/rainbowbismuth/gbcc" "work/ex/beta-1.38-1/sources/1.37.0/gh/rainbowbismuth/gbcc"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/rainbowbismuth/gbcc'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/rainbowbismuth/gbcc" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/rainbowbismuth/gbcc"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/rainbowbismuth/gbcc'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a6576032bc5920ebc58bc2642b318bcc893b8959
[INFO] sha for GitHub repo rainbowbismuth/gbcc: a6576032bc5920ebc58bc2642b318bcc893b8959
[INFO] validating manifest of rainbowbismuth/gbcc on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of rainbowbismuth/gbcc on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing rainbowbismuth/gbcc
[INFO] finished frobbing rainbowbismuth/gbcc
[INFO] frobbed toml for rainbowbismuth/gbcc written to work/ex/beta-1.38-1/sources/1.37.0/gh/rainbowbismuth/gbcc/Cargo.toml
[INFO] started frobbing rainbowbismuth/gbcc
[INFO] finished frobbing rainbowbismuth/gbcc
[INFO] frobbed toml for rainbowbismuth/gbcc written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/rainbowbismuth/gbcc/Cargo.toml
[INFO] crate rainbowbismuth/gbcc already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing rainbowbismuth/gbcc against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/rainbowbismuth/gbcc:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 1996791ef1e3515438603b52c95f546b02ab5c594c081b89b0231994ffdb20ea
[INFO] running `"docker" "start" "-a" "1996791ef1e3515438603b52c95f546b02ab5c594c081b89b0231994ffdb20ea"`
[INFO] [stderr]    Compiling gbcc v0.1.0 (/opt/crater/workdir)
[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/dataflow/dominator.rs:17:38
[INFO] [stderr]    |
[INFO] [stderr] 17 |     fn join(&mut self, other: &Self, label: Label) -> bool {
[INFO] [stderr]    |                                      ^^^^^ help: consider prefixing 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/dataflow/dominator.rs:44:9
[INFO] [stderr]    |
[INFO] [stderr] 44 |         label: Label,
[INFO] [stderr]    |         ^^^^^ help: consider prefixing 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: consider prefixing with an underscore: `_label`
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `AnalyzeInstructionBackward`
[INFO] [stderr]  --> src/dataflow/backward_analysis.rs:7:1
[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: method is never used: `new`
[INFO] [stderr]   --> src/dataflow/backward_analysis.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     fn new(fact: &'a mut F) -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `fact`
[INFO] [stderr]   --> src/dataflow/backward_analysis.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     pub fn fact(&self) -> &F {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `fact_mut`
[INFO] [stderr]   --> src/dataflow/backward_analysis.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 |     pub fn fact_mut(self) -> &'a mut F {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `replace`
[INFO] [stderr]   --> src/dataflow/backward_analysis.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 | /     pub fn replace<L: Language>(
[INFO] [stderr] 25 | |         self,
[INFO] [stderr] 26 | |         instruction: L::Instruction,
[INFO] [stderr] 27 | |     ) -> RewriteInstructionBackward<L> {
[INFO] [stderr] 28 | |         RewriteInstructionBackward(RewriteInstructionEnum::Single(instruction))
[INFO] [stderr] 29 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `replace_many`
[INFO] [stderr]   --> src/dataflow/backward_analysis.rs:31:5
[INFO] [stderr]    |
[INFO] [stderr] 31 | /     pub fn replace_many<L: Language>(
[INFO] [stderr] 32 | |         self,
[INFO] [stderr] 33 | |         instructions: Vec<L::Instruction>,
[INFO] [stderr] 34 | |     ) -> RewriteInstructionBackward<L> {
[INFO] [stderr] 35 | |         RewriteInstructionBackward(RewriteInstructionEnum::Multiple(instructions))
[INFO] [stderr] 36 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `replace_with_graph`
[INFO] [stderr]   --> src/dataflow/backward_analysis.rs:38:5
[INFO] [stderr]    |
[INFO] [stderr] 38 | /     pub fn replace_with_graph<L: Language>(
[INFO] [stderr] 39 | |         self,
[INFO] [stderr] 40 | |         exit: L::Exit,
[INFO] [stderr] 41 | |         sub_graph: Graph<L>,
[INFO] [stderr] ...  |
[INFO] [stderr] 44 | |         RewriteInstructionBackward(RewriteInstructionEnum::Graph(exit, sub_graph, entry))
[INFO] [stderr] 45 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `AnalyzeExitBackward`
[INFO] [stderr]   --> src/dataflow/backward_analysis.rs:48:1
[INFO] [stderr]    |
[INFO] [stderr] 48 | pub struct AnalyzeExitBackward<'a, F> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/dataflow/backward_analysis.rs:53:5
[INFO] [stderr]    |
[INFO] [stderr] 53 |     fn new(fact: &'a mut F) -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `fact`
[INFO] [stderr]   --> src/dataflow/backward_analysis.rs:57:5
[INFO] [stderr]    |
[INFO] [stderr] 57 |     pub fn fact(&self) -> &F {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `fact_mut`
[INFO] [stderr]   --> src/dataflow/backward_analysis.rs:61:5
[INFO] [stderr]    |
[INFO] [stderr] 61 |     pub fn fact_mut(self) -> &'a mut F {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `replace`
[INFO] [stderr]   --> src/dataflow/backward_analysis.rs:65:5
[INFO] [stderr]    |
[INFO] [stderr] 65 |     pub fn replace<L: Language>(self, exit: L::Exit) -> RewriteExitBackward<L> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `replace_many`
[INFO] [stderr]   --> src/dataflow/backward_analysis.rs:69:5
[INFO] [stderr]    |
[INFO] [stderr] 69 | /     pub fn replace_many<L: Language>(
[INFO] [stderr] 70 | |         self,
[INFO] [stderr] 71 | |         instructions: Vec<L::Instruction>,
[INFO] [stderr] 72 | |         exit: L::Exit,
[INFO] [stderr] 73 | |     ) -> RewriteExitBackward<L> {
[INFO] [stderr] 74 | |         RewriteExitBackward(RewriteExitEnum::Extend(instructions, exit))
[INFO] [stderr] 75 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `replace_with_graph`
[INFO] [stderr]   --> src/dataflow/backward_analysis.rs:77:5
[INFO] [stderr]    |
[INFO] [stderr] 77 | /     pub fn replace_with_graph<L: Language>(
[INFO] [stderr] 78 | |         self,
[INFO] [stderr] 79 | |         exit: L::Exit,
[INFO] [stderr] 80 | |         sub_graph: Graph<L>,
[INFO] [stderr] 81 | |     ) -> RewriteExitBackward<L> {
[INFO] [stderr] 82 | |         RewriteExitBackward(RewriteExitEnum::Graph(exit, sub_graph))
[INFO] [stderr] 83 | |     }
[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:147:1
[INFO] [stderr]     |
[INFO] [stderr] 147 | / pub fn backward_analysis<L, A, F>(analysis: &mut A, graph: &Graph<L>, entry: Label) -> FactBase<F>
[INFO] [stderr] 148 | | where
[INFO] [stderr] 149 | |     L: Language,
[INFO] [stderr] 150 | |     A: BackwardAnalysis<L, F>,
[INFO] [stderr] ...   |
[INFO] [stderr] 155 | |     fact_base
[INFO] [stderr] 156 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fixed_point_backward_graph`
[INFO] [stderr]    --> src/dataflow/backward_analysis.rs:158:1
[INFO] [stderr]     |
[INFO] [stderr] 158 | / fn fixed_point_backward_graph<L, A, F>(
[INFO] [stderr] 159 | |     analysis: &mut A,
[INFO] [stderr] 160 | |     graph: &Graph<L>,
[INFO] [stderr] 161 | |     entry: Label,
[INFO] [stderr] ...   |
[INFO] [stderr] 191 | |     }
[INFO] [stderr] 192 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fixed_point_backward_block`
[INFO] [stderr]    --> src/dataflow/backward_analysis.rs:194:1
[INFO] [stderr]     |
[INFO] [stderr] 194 | / fn fixed_point_backward_block<L, A, F>(
[INFO] [stderr] 195 | |     analysis: &mut A,
[INFO] [stderr] 196 | |     graph: &Graph<L>,
[INFO] [stderr] 197 | |     label: Label,
[INFO] [stderr] ...   |
[INFO] [stderr] 258 | |     analysis.analyze_entry(&graph, label, &block.entry, fact)
[INFO] [stderr] 259 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `DominatorAnalysis`
[INFO] [stderr]   --> src/dataflow/dominator.rs:38:1
[INFO] [stderr]    |
[INFO] [stderr] 38 | pub struct DominatorAnalysis;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `fact`
[INFO] [stderr]  --> src/dataflow/forward_analysis.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     fact: &'a mut F,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/dataflow/forward_analysis.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     fn new(fact: &'a mut F) -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `fact`
[INFO] [stderr]   --> src/dataflow/forward_analysis.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     pub fn fact(&self) -> &F {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `fact_mut`
[INFO] [stderr]   --> src/dataflow/forward_analysis.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 |     pub fn fact_mut(self) -> &'a mut F {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `replace`
[INFO] [stderr]   --> src/dataflow/forward_analysis.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     pub fn replace<L: Language>(self, instruction: L::Instruction) -> RewriteInstruction<L> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `replace_many`
[INFO] [stderr]   --> src/dataflow/forward_analysis.rs:28:5
[INFO] [stderr]    |
[INFO] [stderr] 28 | /     pub fn replace_many<L: Language>(
[INFO] [stderr] 29 | |         self,
[INFO] [stderr] 30 | |         instructions: Vec<L::Instruction>,
[INFO] [stderr] 31 | |     ) -> RewriteInstruction<L> {
[INFO] [stderr] 32 | |         RewriteInstruction(RewriteInstructionEnum::Multiple(instructions))
[INFO] [stderr] 33 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `replace_with_graph`
[INFO] [stderr]   --> src/dataflow/forward_analysis.rs:35:5
[INFO] [stderr]    |
[INFO] [stderr] 35 | /     pub fn replace_with_graph<L: Language>(
[INFO] [stderr] 36 | |         self,
[INFO] [stderr] 37 | |         exit: L::Exit,
[INFO] [stderr] 38 | |         sub_graph: Graph<L>,
[INFO] [stderr] ...  |
[INFO] [stderr] 41 | |         RewriteInstruction(RewriteInstructionEnum::Graph(exit, sub_graph, entry))
[INFO] [stderr] 42 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Single`
[INFO] [stderr]   --> src/dataflow/forward_analysis.rs:51:5
[INFO] [stderr]    |
[INFO] [stderr] 51 |     Single(L::Instruction),
[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: function is never used: `forward_analysis`
[INFO] [stderr]    --> src/dataflow/forward_analysis.rs:107:1
[INFO] [stderr]     |
[INFO] [stderr] 107 | / pub fn forward_analysis<L, A, F>(
[INFO] [stderr] 108 | |     analysis: &mut A,
[INFO] [stderr] 109 | |     graph: &Graph<L>,
[INFO] [stderr] 110 | |     entry: Label,
[INFO] [stderr] ...   |
[INFO] [stderr] 123 | |     fact_base
[INFO] [stderr] 124 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fixed_point_forward_graph`
[INFO] [stderr]    --> src/dataflow/forward_analysis.rs:126:1
[INFO] [stderr]     |
[INFO] [stderr] 126 | / fn fixed_point_forward_graph<L, A, F>(
[INFO] [stderr] 127 | |     analysis: &mut A,
[INFO] [stderr] 128 | |     graph: &Graph<L>,
[INFO] [stderr] 129 | |     entry: Label,
[INFO] [stderr] ...   |
[INFO] [stderr] 158 | |     }
[INFO] [stderr] 159 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fixed_point_forward_block`
[INFO] [stderr]    --> src/dataflow/forward_analysis.rs:161:1
[INFO] [stderr]     |
[INFO] [stderr] 161 | / fn fixed_point_forward_block<L, A, F>(
[INFO] [stderr] 162 | |     analysis: &mut A,
[INFO] [stderr] 163 | |     graph: &Graph<L>,
[INFO] [stderr] 164 | |     label: Label,
[INFO] [stderr] ...   |
[INFO] [stderr] 223 | |     }
[INFO] [stderr] 224 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/dataflow/graph.rs:40:5
[INFO] [stderr]    |
[INFO] [stderr] 40 |     pub fn new(entry: L::Entry, code: Vec<L::Instruction>, exit: L::Exit) -> BasicBlock<L> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `label`
[INFO] [stderr]   --> src/dataflow/graph.rs:44:5
[INFO] [stderr]    |
[INFO] [stderr] 44 |     pub fn label(&self) -> Label {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `successors`
[INFO] [stderr]   --> src/dataflow/graph.rs:48:5
[INFO] [stderr]    |
[INFO] [stderr] 48 |     pub fn successors(&self) -> Vec<Label> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `from_blocks`
[INFO] [stderr]   --> src/dataflow/graph.rs:59:5
[INFO] [stderr]    |
[INFO] [stderr] 59 |     pub fn from_blocks(blocks: Vec<BasicBlock<L>>) -> Graph<L> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `post_order_traversal`
[INFO] [stderr]   --> src/dataflow/graph.rs:68:5
[INFO] [stderr]    |
[INFO] [stderr] 68 |     pub fn post_order_traversal(&self, entry: Label) -> Vec<Label> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `go`
[INFO] [stderr]   --> src/dataflow/graph.rs:69:9
[INFO] [stderr]    |
[INFO] [stderr] 69 | /         fn go<L: Language>(
[INFO] [stderr] 70 | |             graph: &Graph<L>,
[INFO] [stderr] 71 | |             output: &mut Vec<Label>,
[INFO] [stderr] 72 | |             visited: &mut FnvHashSet<Label>,
[INFO] [stderr] ...  |
[INFO] [stderr] 81 | |             output.push(label);
[INFO] [stderr] 82 | |         }
[INFO] [stderr]    | |_________^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `contains`
[INFO] [stderr]   --> src/dataflow/graph.rs:90:5
[INFO] [stderr]    |
[INFO] [stderr] 90 |     pub fn contains(&self, label: Label) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `direct_predecessors`
[INFO] [stderr]   --> src/dataflow/graph.rs:94:5
[INFO] [stderr]    |
[INFO] [stderr] 94 |     pub fn direct_predecessors(&self, label: Label) -> Vec<Label> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.55s
[INFO] running `"docker" "inspect" "1996791ef1e3515438603b52c95f546b02ab5c594c081b89b0231994ffdb20ea"`
[INFO] running `"docker" "rm" "-f" "1996791ef1e3515438603b52c95f546b02ab5c594c081b89b0231994ffdb20ea"`
[INFO] [stdout] 1996791ef1e3515438603b52c95f546b02ab5c594c081b89b0231994ffdb20ea
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/rainbowbismuth/gbcc:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] a2b9a428bd273b52d156ee8af256882c9c3e9e65a3c22ee584b3aada85864e78
[INFO] running `"docker" "start" "-a" "a2b9a428bd273b52d156ee8af256882c9c3e9e65a3c22ee584b3aada85864e78"`
[INFO] [stderr]    Compiling gbcc v0.1.0 (/opt/crater/workdir)
[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/dataflow/dominator.rs:17:38
[INFO] [stderr]    |
[INFO] [stderr] 17 |     fn join(&mut self, other: &Self, label: Label) -> bool {
[INFO] [stderr]    |                                      ^^^^^ help: consider prefixing 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/dataflow/dominator.rs:44:9
[INFO] [stderr]    |
[INFO] [stderr] 44 |         label: Label,
[INFO] [stderr]    |         ^^^^^ help: consider prefixing 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: consider prefixing with an underscore: `_label`
[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: consider prefixing with an underscore: `_label`
[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: consider prefixing with an underscore: `_label`
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `AnalyzeInstructionBackward`
[INFO] [stderr]  --> src/dataflow/backward_analysis.rs:7:1
[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: method is never used: `new`
[INFO] [stderr]   --> src/dataflow/backward_analysis.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     fn new(fact: &'a mut F) -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `fact`
[INFO] [stderr]   --> src/dataflow/backward_analysis.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     pub fn fact(&self) -> &F {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `fact_mut`
[INFO] [stderr]   --> src/dataflow/backward_analysis.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 |     pub fn fact_mut(self) -> &'a mut F {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `replace`
[INFO] [stderr]   --> src/dataflow/backward_analysis.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 | /     pub fn replace<L: Language>(
[INFO] [stderr] 25 | |         self,
[INFO] [stderr] 26 | |         instruction: L::Instruction,
[INFO] [stderr] 27 | |     ) -> RewriteInstructionBackward<L> {
[INFO] [stderr] 28 | |         RewriteInstructionBackward(RewriteInstructionEnum::Single(instruction))
[INFO] [stderr] 29 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `replace_many`
[INFO] [stderr]   --> src/dataflow/backward_analysis.rs:31:5
[INFO] [stderr]    |
[INFO] [stderr] 31 | /     pub fn replace_many<L: Language>(
[INFO] [stderr] 32 | |         self,
[INFO] [stderr] 33 | |         instructions: Vec<L::Instruction>,
[INFO] [stderr] 34 | |     ) -> RewriteInstructionBackward<L> {
[INFO] [stderr] 35 | |         RewriteInstructionBackward(RewriteInstructionEnum::Multiple(instructions))
[INFO] [stderr] 36 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `replace_with_graph`
[INFO] [stderr]   --> src/dataflow/backward_analysis.rs:38:5
[INFO] [stderr]    |
[INFO] [stderr] 38 | /     pub fn replace_with_graph<L: Language>(
[INFO] [stderr] 39 | |         self,
[INFO] [stderr] 40 | |         exit: L::Exit,
[INFO] [stderr] 41 | |         sub_graph: Graph<L>,
[INFO] [stderr] ...  |
[INFO] [stderr] 44 | |         RewriteInstructionBackward(RewriteInstructionEnum::Graph(exit, sub_graph, entry))
[INFO] [stderr] 45 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `AnalyzeExitBackward`
[INFO] [stderr]   --> src/dataflow/backward_analysis.rs:48:1
[INFO] [stderr]    |
[INFO] [stderr] 48 | pub struct AnalyzeExitBackward<'a, F> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/dataflow/backward_analysis.rs:53:5
[INFO] [stderr]    |
[INFO] [stderr] 53 |     fn new(fact: &'a mut F) -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `fact`
[INFO] [stderr]   --> src/dataflow/backward_analysis.rs:57:5
[INFO] [stderr]    |
[INFO] [stderr] 57 |     pub fn fact(&self) -> &F {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `fact_mut`
[INFO] [stderr]   --> src/dataflow/backward_analysis.rs:61:5
[INFO] [stderr]    |
[INFO] [stderr] 61 |     pub fn fact_mut(self) -> &'a mut F {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `replace`
[INFO] [stderr]   --> src/dataflow/backward_analysis.rs:65:5
[INFO] [stderr]    |
[INFO] [stderr] 65 |     pub fn replace<L: Language>(self, exit: L::Exit) -> RewriteExitBackward<L> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `replace_many`
[INFO] [stderr]   --> src/dataflow/backward_analysis.rs:69:5
[INFO] [stderr]    |
[INFO] [stderr] 69 | /     pub fn replace_many<L: Language>(
[INFO] [stderr] 70 | |         self,
[INFO] [stderr] 71 | |         instructions: Vec<L::Instruction>,
[INFO] [stderr] 72 | |         exit: L::Exit,
[INFO] [stderr] 73 | |     ) -> RewriteExitBackward<L> {
[INFO] [stderr] 74 | |         RewriteExitBackward(RewriteExitEnum::Extend(instructions, exit))
[INFO] [stderr] 75 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `replace_with_graph`
[INFO] [stderr]   --> src/dataflow/backward_analysis.rs:77:5
[INFO] [stderr]    |
[INFO] [stderr] 77 | /     pub fn replace_with_graph<L: Language>(
[INFO] [stderr] 78 | |         self,
[INFO] [stderr] 79 | |         exit: L::Exit,
[INFO] [stderr] 80 | |         sub_graph: Graph<L>,
[INFO] [stderr] 81 | |     ) -> RewriteExitBackward<L> {
[INFO] [stderr] 82 | |         RewriteExitBackward(RewriteExitEnum::Graph(exit, sub_graph))
[INFO] [stderr] 83 | |     }
[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:147:1
[INFO] [stderr]     |
[INFO] [stderr] 147 | / pub fn backward_analysis<L, A, F>(analysis: &mut A, graph: &Graph<L>, entry: Label) -> FactBase<F>
[INFO] [stderr] 148 | | where
[INFO] [stderr] 149 | |     L: Language,
[INFO] [stderr] 150 | |     A: BackwardAnalysis<L, F>,
[INFO] [stderr] ...   |
[INFO] [stderr] 155 | |     fact_base
[INFO] [stderr] 156 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fixed_point_backward_graph`
[INFO] [stderr]    --> src/dataflow/backward_analysis.rs:158:1
[INFO] [stderr]     |
[INFO] [stderr] 158 | / fn fixed_point_backward_graph<L, A, F>(
[INFO] [stderr] 159 | |     analysis: &mut A,
[INFO] [stderr] 160 | |     graph: &Graph<L>,
[INFO] [stderr] 161 | |     entry: Label,
[INFO] [stderr] ...   |
[INFO] [stderr] 191 | |     }
[INFO] [stderr] 192 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fixed_point_backward_block`
[INFO] [stderr]    --> src/dataflow/backward_analysis.rs:194:1
[INFO] [stderr]     |
[INFO] [stderr] 194 | / fn fixed_point_backward_block<L, A, F>(
[INFO] [stderr] 195 | |     analysis: &mut A,
[INFO] [stderr] 196 | |     graph: &Graph<L>,
[INFO] [stderr] 197 | |     label: Label,
[INFO] [stderr] ...   |
[INFO] [stderr] 258 | |     analysis.analyze_entry(&graph, label, &block.entry, fact)
[INFO] [stderr] 259 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `replace_many`
[INFO] [stderr]   --> src/dataflow/forward_analysis.rs:28:5
[INFO] [stderr]    |
[INFO] [stderr] 28 | /     pub fn replace_many<L: Language>(
[INFO] [stderr] 29 | |         self,
[INFO] [stderr] 30 | |         instructions: Vec<L::Instruction>,
[INFO] [stderr] 31 | |     ) -> RewriteInstruction<L> {
[INFO] [stderr] 32 | |         RewriteInstruction(RewriteInstructionEnum::Multiple(instructions))
[INFO] [stderr] 33 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `replace_with_graph`
[INFO] [stderr]   --> src/dataflow/forward_analysis.rs:35:5
[INFO] [stderr]    |
[INFO] [stderr] 35 | /     pub fn replace_with_graph<L: Language>(
[INFO] [stderr] 36 | |         self,
[INFO] [stderr] 37 | |         exit: L::Exit,
[INFO] [stderr] 38 | |         sub_graph: Graph<L>,
[INFO] [stderr] ...  |
[INFO] [stderr] 41 | |         RewriteInstruction(RewriteInstructionEnum::Graph(exit, sub_graph, entry))
[INFO] [stderr] 42 | |     }
[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: method is never used: `direct_predecessors`
[INFO] [stderr]   --> src/dataflow/graph.rs:94:5
[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]     Finished dev [unoptimized + debuginfo] target(s) in 1.92s
[INFO] running `"docker" "inspect" "a2b9a428bd273b52d156ee8af256882c9c3e9e65a3c22ee584b3aada85864e78"`
[INFO] running `"docker" "rm" "-f" "a2b9a428bd273b52d156ee8af256882c9c3e9e65a3c22ee584b3aada85864e78"`
[INFO] [stdout] a2b9a428bd273b52d156ee8af256882c9c3e9e65a3c22ee584b3aada85864e78
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/rainbowbismuth/gbcc:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-08-13" "test" "--frozen"`
[INFO] [stdout] 2394e118499e467bb0bacd19304275ee8c697164491a4bdc61eb032d8e891e41
[INFO] running `"docker" "start" "-a" "2394e118499e467bb0bacd19304275ee8c697164491a4bdc61eb032d8e891e41"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/gbcc-ac681252593d87be
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test test::dominator_test ... ok
[INFO] [stdout] test test::constant_test ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "2394e118499e467bb0bacd19304275ee8c697164491a4bdc61eb032d8e891e41"`
[INFO] running `"docker" "rm" "-f" "2394e118499e467bb0bacd19304275ee8c697164491a4bdc61eb032d8e891e41"`
[INFO] [stdout] 2394e118499e467bb0bacd19304275ee8c697164491a4bdc61eb032d8e891e41