[INFO] cloning repository https://github.com/FeanorTheElf/Parser
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/FeanorTheElf/Parser" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FFeanorTheElf%2FParser"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FFeanorTheElf%2FParser'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 7738339c9159ebeaff187244f1defb2bb99fae66
[INFO] checking FeanorTheElf/Parser against try#e4dba30b9b475d8750370c4dfb49b6541990904d for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FFeanorTheElf%2FParser" "/workspace/builds/worker-8/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/FeanorTheElf/Parser on toolchain e4dba30b9b475d8750370c4dfb49b6541990904d
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/FeanorTheElf/Parser
[INFO] finished tweaking git repo https://github.com/FeanorTheElf/Parser
[INFO] tweaked toml for git repo https://github.com/FeanorTheElf/Parser written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/FeanorTheElf/Parser already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 4bd37d863cd02da6b005a7eab838cffa327d9e666e30e0cbdcbdbc8e26bb4e84
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "4bd37d863cd02da6b005a7eab838cffa327d9e666e30e0cbdcbdbc8e26bb4e84"`
[INFO] [stderr]     Checking either v1.5.3
[INFO] [stderr]     Checking take_mut v0.2.2
[INFO] [stderr]     Checking itertools v0.8.2
[INFO] [stderr]     Checking parser v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:23:6
[INFO] [stderr]    |
[INFO] [stderr] 23 |     let mut program = Program::parse(&mut lex("
[INFO] [stderr]    |         ----^^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:23:6
[INFO] [stderr]    |
[INFO] [stderr] 23 |     let mut program = Program::parse(&mut lex("
[INFO] [stderr]    |         ----^^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `get_all_mut`
[INFO] [stderr]   --> src/util/mod.rs:20:8
[INFO] [stderr]    |
[INFO] [stderr] 20 | pub fn get_all_mut<'a, T, I>(vec: &'a mut Vec<T>, it: I) -> impl 'a + Iterator<Item = &'a mut T>
[INFO] [stderr]    |        ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `UndefinedSymbol`
[INFO] [stderr]  --> src/language/error.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     UndefinedSymbol,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `ShadowedDefinition`
[INFO] [stderr]  --> src/language/error.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     ShadowedDefinition,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `VariableVoidType`
[INFO] [stderr]   --> src/language/error.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     VariableVoidType,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `DuplicateDefinition`
[INFO] [stderr]   --> src/language/error.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     DuplicateDefinition,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `IllegalArrayBaseType`
[INFO] [stderr]   --> src/language/error.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     IllegalArrayBaseType,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_position`
[INFO] [stderr]   --> src/language/error.rs:32:5
[INFO] [stderr]    |
[INFO] [stderr] 32 |     pub fn get_position(&self) -> &TextPosition {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `TestType`
[INFO] [stderr]   --> src/language/program.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 |     TestType,
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `print_nazgul`
[INFO] [stderr]   --> src/language/nazgul_printer.rs:26:8
[INFO] [stderr]    |
[INFO] [stderr] 26 | pub fn print_nazgul<T: ?Sized + Printable>(node: &T) -> NazgulDisplay<T>
[INFO] [stderr]    |        ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `create`
[INFO] [stderr]    --> src/transformation/scope.rs:119:5
[INFO] [stderr]     |
[INFO] [stderr] 119 | /     fn create<T: ?Sized>(scope: &T) -> ScopeNode 
[INFO] [stderr] 120 | |         where for<'a> &'a T: EnumerateDefinitions<'a>
[INFO] [stderr] 121 | |     {
[INFO] [stderr] 122 | |         ScopeNode {
[INFO] [stderr] 123 | |             definitions: scope.enumerate().map(|def| def.get_name().clone()).collect()
[INFO] [stderr] 124 | |         }
[INFO] [stderr] 125 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]    --> src/transformation/scope.rs:154:5
[INFO] [stderr]     |
[INFO] [stderr] 154 |     pub fn new(global: &[Box<Function>]) -> ScopeStack
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `child_stack`
[INFO] [stderr]    --> src/transformation/scope.rs:162:5
[INFO] [stderr]     |
[INFO] [stderr] 162 |     pub fn child_stack<'b>(&'b self) -> ScopeStack<'b>
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `enter`
[INFO] [stderr]    --> src/transformation/scope.rs:170:5
[INFO] [stderr]     |
[INFO] [stderr] 170 | /     pub fn enter<T: ?Sized>(&mut self, scope: &T)
[INFO] [stderr] 171 | |         where for<'b> &'b T: EnumerateDefinitions<'b>
[INFO] [stderr] 172 | |     {
[INFO] [stderr] 173 | |         self.scopes.push(ScopeNode::create(scope));
[INFO] [stderr] 174 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `exit`
[INFO] [stderr]    --> src/transformation/scope.rs:176:5
[INFO] [stderr]     |
[INFO] [stderr] 176 |     pub fn exit(&mut self) 
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `parent_stacks`
[INFO] [stderr]    --> src/transformation/scope.rs:181:5
[INFO] [stderr]     |
[INFO] [stderr] 181 |     fn parent_stacks<'b>(&'b self) -> ScopeStackIter<'b>
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `definitions`
[INFO] [stderr]    --> src/transformation/scope.rs:188:5
[INFO] [stderr]     |
[INFO] [stderr] 188 |     pub fn definitions<'b>(&'b self) -> impl 'b + Iterator<Item = &'b Name>
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `rename_disjunct`
[INFO] [stderr]    --> src/transformation/scope.rs:193:5
[INFO] [stderr]     |
[INFO] [stderr] 193 |     pub fn rename_disjunct<'b>(&'b self) -> impl 'b + FnMut(Name) -> Name
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `replace_expression_with_inlined`
[INFO] [stderr]  --> src/transformation/inline.rs:5:4
[INFO] [stderr]   |
[INFO] [stderr] 5 | fn replace_expression_with_inlined<'a, F>(rename_disjunct: &'a mut F) -> impl (FnMut(Expression, &mut Vec<Box<dyn Statement>>, &mut Vec<usize>) -> Expression) + 'a
[INFO] [stderr]   |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `prepare_inline_expressions_in_block`
[INFO] [stderr]   --> src/transformation/inline.rs:50:4
[INFO] [stderr]    |
[INFO] [stderr] 50 | fn prepare_inline_expressions_in_block<'a, 'b>(block: &'a mut Block, parent_scopes: &'b ScopeStack<'b>) -> (ScopeStack<'b>, impl 'a + Iterator<Item = &'a mut Block>)
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 20 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `UndefinedSymbol`
[INFO] [stderr]  --> src/language/error.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     UndefinedSymbol,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `ShadowedDefinition`
[INFO] [stderr]  --> src/language/error.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     ShadowedDefinition,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `VariableVoidType`
[INFO] [stderr]   --> src/language/error.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     VariableVoidType,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `DuplicateDefinition`
[INFO] [stderr]   --> src/language/error.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     DuplicateDefinition,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `IllegalArrayBaseType`
[INFO] [stderr]   --> src/language/error.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     IllegalArrayBaseType,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_position`
[INFO] [stderr]   --> src/language/error.rs:32:5
[INFO] [stderr]    |
[INFO] [stderr] 32 |     pub fn get_position(&self) -> &TextPosition {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused implementer of `std::iter::Iterator` in tuple element 1 that must be used
[INFO] [stderr]   --> src/transformation/inline.rs:88:5
[INFO] [stderr]    |
[INFO] [stderr] 88 |     prepare_inline_expressions_in_block(&mut block, &scope_stack);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: iterators are lazy and do nothing unless consumed
[INFO] [stderr] 
[INFO] [stderr] warning: 8 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.45s
[INFO] running `"docker" "inspect" "4bd37d863cd02da6b005a7eab838cffa327d9e666e30e0cbdcbdbc8e26bb4e84"`
[INFO] running `"docker" "rm" "-f" "4bd37d863cd02da6b005a7eab838cffa327d9e666e30e0cbdcbdbc8e26bb4e84"`
[INFO] [stdout] 4bd37d863cd02da6b005a7eab838cffa327d9e666e30e0cbdcbdbc8e26bb4e84