[INFO] updating cached repository https://github.com/xkapastel/unitype
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 02ec4aac95917de7be855eac5ce5964621a9293c
[INFO] checking xkapastel/unitype against try#ea663bba38739867a4b75ac820991b4f5d093c3b for pr-62262-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxkapastel%2Funitype" "/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/xkapastel/unitype on toolchain ea663bba38739867a4b75ac820991b4f5d093c3b
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/xkapastel/unitype
[INFO] finished tweaking git repo https://github.com/xkapastel/unitype
[INFO] tweaked toml for git repo https://github.com/xkapastel/unitype written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/xkapastel/unitype already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[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" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 6520123e07780ad01e6909038e7ba3760b974162ebf264d21c646f5a31d14224
[INFO] running `"docker" "start" "-a" "6520123e07780ad01e6909038e7ba3760b974162ebf264d21c646f5a31d14224"`
[INFO] [stderr]     Checking unitype v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `key`
[INFO] [stderr]   --> src/dictionary.rs:36:22
[INFO] [stderr]    |
[INFO] [stderr] 36 |   pub fn read(&self, key: &str) -> Option<Rc<str>> {
[INFO] [stderr]    |                      ^^^ help: consider prefixing with an underscore: `_key`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `key`
[INFO] [stderr]   --> src/dictionary.rs:40:27
[INFO] [stderr]    |
[INFO] [stderr] 40 |   pub fn write(&mut self, key: &str, value: Rc<str>) -> Option<Rc<str>> {
[INFO] [stderr]    |                           ^^^ help: consider prefixing with an underscore: `_key`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `value`
[INFO] [stderr]   --> src/dictionary.rs:40:38
[INFO] [stderr]    |
[INFO] [stderr] 40 |   pub fn write(&mut self, key: &str, value: Rc<str>) -> Option<Rc<str>> {
[INFO] [stderr]    |                                      ^^^^^ help: consider prefixing with an underscore: `_value`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `key`
[INFO] [stderr]   --> src/dictionary.rs:44:28
[INFO] [stderr]    |
[INFO] [stderr] 44 |   pub fn delete(&mut self, key: &str) -> Option<Rc<str>> {
[INFO] [stderr]    |                            ^^^ help: consider prefixing with an underscore: `_key`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `src`
[INFO] [stderr]   --> src/driver/pure/mod.rs:52:31
[INFO] [stderr]    |
[INFO] [stderr] 52 |   pub fn normalize(&mut self, src: &str, ctx: &Dictionary) -> Result<String> {
[INFO] [stderr]    |                               ^^^ help: consider prefixing with an underscore: `_src`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `ctx`
[INFO] [stderr]   --> src/driver/pure/mod.rs:52:42
[INFO] [stderr]    |
[INFO] [stderr] 52 |   pub fn normalize(&mut self, src: &str, ctx: &Dictionary) -> Result<String> {
[INFO] [stderr]    |                                          ^^^ help: consider prefixing with an underscore: `_ctx`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> src/driver/pure/heap.rs:56:9
[INFO] [stderr]    |
[INFO] [stderr] 56 |     for i in 0..capacity {
[INFO] [stderr]    |         ^ help: consider prefixing with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `nodes`
[INFO] [stderr]   --> src/driver/pure/heap.rs:29:3
[INFO] [stderr]    |
[INFO] [stderr] 29 |   nodes: Vec<Option<Node>>,
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `time`
[INFO] [stderr]   --> src/driver/pure/heap.rs:30:3
[INFO] [stderr]    |
[INFO] [stderr] 30 |   time: u64,
[INFO] [stderr]    |   ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `object`
[INFO] [stderr]   --> src/driver/pure/heap.rs:34:3
[INFO] [stderr]    |
[INFO] [stderr] 34 |   object: Object,
[INFO] [stderr]    |   ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `timestamp`
[INFO] [stderr]   --> src/driver/pure/heap.rs:35:3
[INFO] [stderr]    |
[INFO] [stderr] 35 |   timestamp: u64,
[INFO] [stderr]    |   ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `is_marked`
[INFO] [stderr]   --> src/driver/pure/heap.rs:36:3
[INFO] [stderr]    |
[INFO] [stderr] 36 |   is_marked: bool,
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Id`
[INFO] [stderr]   --> src/driver/pure/heap.rs:40:3
[INFO] [stderr]    |
[INFO] [stderr] 40 |   Id,
[INFO] [stderr]    |   ^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `App`
[INFO] [stderr]   --> src/driver/pure/heap.rs:41:3
[INFO] [stderr]    |
[INFO] [stderr] 41 |   App,
[INFO] [stderr]    |   ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Box`
[INFO] [stderr]   --> src/driver/pure/heap.rs:42:3
[INFO] [stderr]    |
[INFO] [stderr] 42 |   Box,
[INFO] [stderr]    |   ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Cat`
[INFO] [stderr]   --> src/driver/pure/heap.rs:43:3
[INFO] [stderr]    |
[INFO] [stderr] 43 |   Cat,
[INFO] [stderr]    |   ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Copy`
[INFO] [stderr]   --> src/driver/pure/heap.rs:44:3
[INFO] [stderr]    |
[INFO] [stderr] 44 |   Copy,
[INFO] [stderr]    |   ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Drop`
[INFO] [stderr]   --> src/driver/pure/heap.rs:45:3
[INFO] [stderr]    |
[INFO] [stderr] 45 |   Drop,
[INFO] [stderr]    |   ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Swap`
[INFO] [stderr]   --> src/driver/pure/heap.rs:46:3
[INFO] [stderr]    |
[INFO] [stderr] 46 |   Swap,
[INFO] [stderr]    |   ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Abs`
[INFO] [stderr]   --> src/driver/pure/heap.rs:47:3
[INFO] [stderr]    |
[INFO] [stderr] 47 |   Abs(Gc),
[INFO] [stderr]    |   ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Seq`
[INFO] [stderr]   --> src/driver/pure/heap.rs:48:3
[INFO] [stderr]    |
[INFO] [stderr] 48 |   Seq(Gc, Gc),
[INFO] [stderr]    |   ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Var`
[INFO] [stderr]   --> src/driver/pure/heap.rs:49:3
[INFO] [stderr]    |
[INFO] [stderr] 49 |   Var(Rc<str>),
[INFO] [stderr]    |   ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Tag`
[INFO] [stderr]   --> src/driver/pure/heap.rs:50:3
[INFO] [stderr]    |
[INFO] [stderr] 50 |   Tag(Rc<str>),
[INFO] [stderr]    |   ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `put`
[INFO] [stderr]   --> src/driver/pure/heap.rs:65:3
[INFO] [stderr]    |
[INFO] [stderr] 65 |   fn put(&mut self, object: Object) -> Result<Gc> {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_ref`
[INFO] [stderr]   --> src/driver/pure/heap.rs:85:3
[INFO] [stderr]    |
[INFO] [stderr] 85 |   fn get_ref(&self, pointer: Gc) -> Result<&Object> {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new_id`
[INFO] [stderr]   --> src/driver/pure/heap.rs:99:3
[INFO] [stderr]    |
[INFO] [stderr] 99 |   pub fn new_id(&mut self) -> Result<Gc> {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new_app`
[INFO] [stderr]    --> src/driver/pure/heap.rs:104:3
[INFO] [stderr]     |
[INFO] [stderr] 104 |   pub fn new_app(&mut self) -> Result<Gc> {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new_box`
[INFO] [stderr]    --> src/driver/pure/heap.rs:109:3
[INFO] [stderr]     |
[INFO] [stderr] 109 |   pub fn new_box(&mut self) -> Result<Gc> {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new_cat`
[INFO] [stderr]    --> src/driver/pure/heap.rs:114:3
[INFO] [stderr]     |
[INFO] [stderr] 114 |   pub fn new_cat(&mut self) -> Result<Gc> {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new_copy`
[INFO] [stderr]    --> src/driver/pure/heap.rs:119:3
[INFO] [stderr]     |
[INFO] [stderr] 119 |   pub fn new_copy(&mut self) -> Result<Gc> {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new_drop`
[INFO] [stderr]    --> src/driver/pure/heap.rs:124:3
[INFO] [stderr]     |
[INFO] [stderr] 124 |   pub fn new_drop(&mut self) -> Result<Gc> {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new_swap`
[INFO] [stderr]    --> src/driver/pure/heap.rs:129:3
[INFO] [stderr]     |
[INFO] [stderr] 129 |   pub fn new_swap(&mut self) -> Result<Gc> {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new_abs`
[INFO] [stderr]    --> src/driver/pure/heap.rs:134:3
[INFO] [stderr]     |
[INFO] [stderr] 134 |   pub fn new_abs(&mut self, body: Gc) -> Result<Gc> {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new_seq`
[INFO] [stderr]    --> src/driver/pure/heap.rs:139:3
[INFO] [stderr]     |
[INFO] [stderr] 139 |   pub fn new_seq(&mut self, fst: Gc, snd: Gc) -> Result<Gc> {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new_var`
[INFO] [stderr]    --> src/driver/pure/heap.rs:144:3
[INFO] [stderr]     |
[INFO] [stderr] 144 |   pub fn new_var(&mut self, value: Rc<str>) -> Result<Gc> {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new_tag`
[INFO] [stderr]    --> src/driver/pure/heap.rs:149:3
[INFO] [stderr]     |
[INFO] [stderr] 149 |   pub fn new_tag(&mut self, value: Rc<str>) -> Result<Gc> {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_id`
[INFO] [stderr]    --> src/driver/pure/heap.rs:154:3
[INFO] [stderr]     |
[INFO] [stderr] 154 |   pub fn is_id(&self, pointer: Gc) -> Result<bool> {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_app`
[INFO] [stderr]    --> src/driver/pure/heap.rs:165:3
[INFO] [stderr]     |
[INFO] [stderr] 165 |   pub fn is_app(&self, pointer: Gc) -> Result<bool> {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_box`
[INFO] [stderr]    --> src/driver/pure/heap.rs:176:3
[INFO] [stderr]     |
[INFO] [stderr] 176 |   pub fn is_box(&self, pointer: Gc) -> Result<bool> {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_cat`
[INFO] [stderr]    --> src/driver/pure/heap.rs:187:3
[INFO] [stderr]     |
[INFO] [stderr] 187 |   pub fn is_cat(&self, pointer: Gc) -> Result<bool> {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_copy`
[INFO] [stderr]    --> src/driver/pure/heap.rs:198:3
[INFO] [stderr]     |
[INFO] [stderr] 198 |   pub fn is_copy(&self, pointer: Gc) -> Result<bool> {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_drop`
[INFO] [stderr]    --> src/driver/pure/heap.rs:209:3
[INFO] [stderr]     |
[INFO] [stderr] 209 |   pub fn is_drop(&self, pointer: Gc) -> Result<bool> {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_swap`
[INFO] [stderr]    --> src/driver/pure/heap.rs:220:3
[INFO] [stderr]     |
[INFO] [stderr] 220 |   pub fn is_swap(&self, pointer: Gc) -> Result<bool> {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_abs`
[INFO] [stderr]    --> src/driver/pure/heap.rs:231:3
[INFO] [stderr]     |
[INFO] [stderr] 231 |   pub fn is_abs(&self, pointer: Gc) -> Result<bool> {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_seq`
[INFO] [stderr]    --> src/driver/pure/heap.rs:242:3
[INFO] [stderr]     |
[INFO] [stderr] 242 |   pub fn is_seq(&self, pointer: Gc) -> Result<bool> {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_var`
[INFO] [stderr]    --> src/driver/pure/heap.rs:253:3
[INFO] [stderr]     |
[INFO] [stderr] 253 |   pub fn is_var(&self, pointer: Gc) -> Result<bool> {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_tag`
[INFO] [stderr]    --> src/driver/pure/heap.rs:264:3
[INFO] [stderr]     |
[INFO] [stderr] 264 |   pub fn is_tag(&self, pointer: Gc) -> Result<bool> {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_var_value`
[INFO] [stderr]    --> src/driver/pure/heap.rs:275:3
[INFO] [stderr]     |
[INFO] [stderr] 275 |   pub fn get_var_value(&self, pointer: Gc) -> Result<Rc<str>> {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_tag_value`
[INFO] [stderr]    --> src/driver/pure/heap.rs:286:3
[INFO] [stderr]     |
[INFO] [stderr] 286 |   pub fn get_tag_value(&self, pointer: Gc) -> Result<Rc<str>> {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_abs_body`
[INFO] [stderr]    --> src/driver/pure/heap.rs:297:3
[INFO] [stderr]     |
[INFO] [stderr] 297 |   pub fn get_abs_body(&self, pointer: Gc) -> Result<Gc> {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_seq_fst`
[INFO] [stderr]    --> src/driver/pure/heap.rs:308:3
[INFO] [stderr]     |
[INFO] [stderr] 308 |   pub fn get_seq_fst(&self, pointer: Gc) -> Result<Gc> {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_seq_snd`
[INFO] [stderr]    --> src/driver/pure/heap.rs:319:3
[INFO] [stderr]     |
[INFO] [stderr] 319 |   pub fn get_seq_snd(&self, pointer: Gc) -> Result<Gc> {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `mark`
[INFO] [stderr]    --> src/driver/pure/heap.rs:330:3
[INFO] [stderr]     |
[INFO] [stderr] 330 |   pub fn mark(&mut self, root: Gc) -> Result<()> {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `sweep`
[INFO] [stderr]    --> src/driver/pure/heap.rs:356:3
[INFO] [stderr]     |
[INFO] [stderr] 356 |   pub fn sweep(&mut self) -> Result<()> {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `read`
[INFO] [stderr]   --> src/driver/pure/codec.rs:22:1
[INFO] [stderr]    |
[INFO] [stderr] 22 | pub fn read(src: &str, heap: &mut Heap) -> Result<Gc> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `print`
[INFO] [stderr]   --> src/driver/pure/codec.rs:86:1
[INFO] [stderr]    |
[INFO] [stderr] 86 | pub fn print(pointer: Gc, heap: &Heap, buffer: &mut String) -> Result<()> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `heap`
[INFO] [stderr]   --> src/driver/pure/mod.rs:40:3
[INFO] [stderr]    |
[INFO] [stderr] 40 |   heap: Heap,
[INFO] [stderr]    |   ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `cache`
[INFO] [stderr]   --> src/driver/pure/mod.rs:41:3
[INFO] [stderr]    |
[INFO] [stderr] 41 |   cache: HashMap<Rc<str>, Gc>,
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `key`
[INFO] [stderr]   --> src/dictionary.rs:36:22
[INFO] [stderr]    |
[INFO] [stderr] 36 |   pub fn read(&self, key: &str) -> Option<Rc<str>> {
[INFO] [stderr]    |                      ^^^ help: consider prefixing with an underscore: `_key`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `key`
[INFO] [stderr]   --> src/dictionary.rs:40:27
[INFO] [stderr]    |
[INFO] [stderr] 40 |   pub fn write(&mut self, key: &str, value: Rc<str>) -> Option<Rc<str>> {
[INFO] [stderr]    |                           ^^^ help: consider prefixing with an underscore: `_key`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `value`
[INFO] [stderr]   --> src/dictionary.rs:40:38
[INFO] [stderr]    |
[INFO] [stderr] 40 |   pub fn write(&mut self, key: &str, value: Rc<str>) -> Option<Rc<str>> {
[INFO] [stderr]    |                                      ^^^^^ help: consider prefixing with an underscore: `_value`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `key`
[INFO] [stderr]   --> src/dictionary.rs:44:28
[INFO] [stderr]    |
[INFO] [stderr] 44 |   pub fn delete(&mut self, key: &str) -> Option<Rc<str>> {
[INFO] [stderr]    |                            ^^^ help: consider prefixing with an underscore: `_key`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `src`
[INFO] [stderr]   --> src/driver/pure/mod.rs:52:31
[INFO] [stderr]    |
[INFO] [stderr] 52 |   pub fn normalize(&mut self, src: &str, ctx: &Dictionary) -> Result<String> {
[INFO] [stderr]    |                               ^^^ help: consider prefixing with an underscore: `_src`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `ctx`
[INFO] [stderr]   --> src/driver/pure/mod.rs:52:42
[INFO] [stderr]    |
[INFO] [stderr] 52 |   pub fn normalize(&mut self, src: &str, ctx: &Dictionary) -> Result<String> {
[INFO] [stderr]    |                                          ^^^ help: consider prefixing with an underscore: `_ctx`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> src/driver/pure/heap.rs:56:9
[INFO] [stderr]    |
[INFO] [stderr] 56 |     for i in 0..capacity {
[INFO] [stderr]    |         ^ help: consider prefixing with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `is_marked`
[INFO] [stderr]   --> src/driver/pure/heap.rs:36:3
[INFO] [stderr]    |
[INFO] [stderr] 36 |   is_marked: bool,
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Tag`
[INFO] [stderr]   --> src/driver/pure/heap.rs:50:3
[INFO] [stderr]    |
[INFO] [stderr] 50 |   Tag(Rc<str>),
[INFO] [stderr]    |   ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new_tag`
[INFO] [stderr]    --> src/driver/pure/heap.rs:149:3
[INFO] [stderr]     |
[INFO] [stderr] 149 |   pub fn new_tag(&mut self, value: Rc<str>) -> Result<Gc> {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `mark`
[INFO] [stderr]    --> src/driver/pure/heap.rs:330:3
[INFO] [stderr]     |
[INFO] [stderr] 330 |   pub fn mark(&mut self, root: Gc) -> Result<()> {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `sweep`
[INFO] [stderr]    --> src/driver/pure/heap.rs:356:3
[INFO] [stderr]     |
[INFO] [stderr] 356 |   pub fn sweep(&mut self) -> Result<()> {
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `heap`
[INFO] [stderr]   --> src/driver/pure/mod.rs:40:3
[INFO] [stderr]    |
[INFO] [stderr] 40 |   heap: Heap,
[INFO] [stderr]    |   ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `cache`
[INFO] [stderr]   --> src/driver/pure/mod.rs:41:3
[INFO] [stderr]    |
[INFO] [stderr] 41 |   cache: HashMap<Rc<str>, Gc>,
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.18s
[INFO] running `"docker" "inspect" "6520123e07780ad01e6909038e7ba3760b974162ebf264d21c646f5a31d14224"`
[INFO] running `"docker" "rm" "-f" "6520123e07780ad01e6909038e7ba3760b974162ebf264d21c646f5a31d14224"`
[INFO] [stdout] 6520123e07780ad01e6909038e7ba3760b974162ebf264d21c646f5a31d14224