[INFO] crate kg-tree 0.1.4 is already in cache
[INFO] extracting crate kg-tree 0.1.4 into work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/reg/kg-tree/0.1.4
[INFO] extracting crate kg-tree 0.1.4 into work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/reg/kg-tree/0.1.4
[INFO] validating manifest of kg-tree-0.1.4 on toolchain master#60960a260f7b5c695fd0717311d72ce62dd4eb43
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of kg-tree-0.1.4 on toolchain try#266783e4e09e4e9d5307c1c8e695659c58bbcac7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing kg-tree-0.1.4
[INFO] finished frobbing kg-tree-0.1.4
[INFO] frobbed toml for kg-tree-0.1.4 written to work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/reg/kg-tree/0.1.4/Cargo.toml
[INFO] started frobbing kg-tree-0.1.4
[INFO] finished frobbing kg-tree-0.1.4
[INFO] frobbed toml for kg-tree-0.1.4 written to work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/reg/kg-tree/0.1.4/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking kg-tree-0.1.4 against try#266783e4e09e4e9d5307c1c8e695659c58bbcac7 for pr-63376
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63376/worker-4/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/reg/kg-tree/0.1.4:/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=forbid" "-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" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 4f9a0faad79a03b7d8ae79a93b513ffec1d0231fac73c65cf341bba9318fc4c9
[INFO] running `"docker" "start" "-a" "4f9a0faad79a03b7d8ae79a93b513ffec1d0231fac73c65cf341bba9318fc4c9"`
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]     Checking assert_approx_eq v1.1.0
[INFO] [stderr]     Checking lock_api v0.2.0
[INFO] [stderr]    Compiling heapsize v0.4.2
[INFO] [stderr]    Compiling parking_lot_core v0.5.0
[INFO] [stderr]    Compiling parking_lot v0.8.0
[INFO] [stderr]    Compiling synstructure v0.5.2
[INFO] [stderr]     Checking kg-utils v0.2.4
[INFO] [stderr]    Compiling kg-display v0.1.2
[INFO] [stderr]    Compiling heapsize_derive v0.1.4
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]     Checking kg-symbol v0.1.10
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling synstructure v0.11.0
[INFO] [stderr]    Compiling kg-display-derive v0.1.1
[INFO] [stderr]    Compiling kg-diag v0.2.4
[INFO] [stderr]    Compiling kg-diag-derive v0.2.3
[INFO] [stderr]     Checking kg-tree v0.1.4 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `super::*`
[INFO] [stderr]    --> src/serial/fmt/json.rs:561:9
[INFO] [stderr]     |
[INFO] [stderr] 561 |     use super::*;
[INFO] [stderr]     |         ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `with_span`
[INFO] [stderr]    --> src/tree/mod.rs:863:5
[INFO] [stderr]     |
[INFO] [stderr] 863 |     pub (crate) fn with_span(self, span: Span) -> NodeRef {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `set_span_from`
[INFO] [stderr]    --> src/tree/mod.rs:868:5
[INFO] [stderr]     |
[INFO] [stderr] 868 |     pub (crate) fn set_span_from(&self, from: Position) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `set_span_to`
[INFO] [stderr]    --> src/tree/mod.rs:875:5
[INFO] [stderr]     |
[INFO] [stderr] 875 |     pub (crate) fn set_span_to(&self, to: Position) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type alias is never used: `Error`
[INFO] [stderr]  --> src/serial/fmt/json.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub type Error = ParseDiag;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `ParseErr`
[INFO] [stderr]   --> src/serial/fmt/json.rs:14:1
[INFO] [stderr]    |
[INFO] [stderr] 14 | pub enum ParseErr {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `invalid_escape`
[INFO] [stderr]   --> src/serial/fmt/json.rs:91:5
[INFO] [stderr]    |
[INFO] [stderr] 91 |     pub fn invalid_escape<T>(r: &mut dyn CharReader) -> Result<T, Error> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `invalid_input`
[INFO] [stderr]    --> src/serial/fmt/json.rs:114:5
[INFO] [stderr]     |
[INFO] [stderr] 114 |     pub fn invalid_input<T>(r: &mut dyn CharReader) -> Result<T, Error> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `invalid_input_one`
[INFO] [stderr]    --> src/serial/fmt/json.rs:138:5
[INFO] [stderr]     |
[INFO] [stderr] 138 |     pub fn invalid_input_one<T>(r: &mut dyn CharReader, expected: char) -> Result<T, Error> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `invalid_input_many`
[INFO] [stderr]    --> src/serial/fmt/json.rs:164:5
[INFO] [stderr]     |
[INFO] [stderr] 164 |     pub fn invalid_input_many<T>(r: &mut dyn CharReader, expected: Vec<char>) -> Result<T, Error> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `unexpected_eoi_str`
[INFO] [stderr]    --> src/serial/fmt/json.rs:191:5
[INFO] [stderr]     |
[INFO] [stderr] 191 |     pub fn unexpected_eoi_str<T>(r: &mut dyn CharReader, expected: String) -> Result<T, Error> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `unexpected_token`
[INFO] [stderr]    --> src/serial/fmt/json.rs:202:5
[INFO] [stderr]     |
[INFO] [stderr] 202 |     pub fn unexpected_token<T>(token: Token, r: &mut dyn CharReader) -> Result<T, Error> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `unexpected_token_one`
[INFO] [stderr]    --> src/serial/fmt/json.rs:209:5
[INFO] [stderr]     |
[INFO] [stderr] 209 |     pub fn unexpected_token_one<T>(token: Token, expected: Terminal, r: &mut dyn CharReader) -> Result<T, Error> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `unexpected_token_many`
[INFO] [stderr]    --> src/serial/fmt/json.rs:216:5
[INFO] [stderr]     |
[INFO] [stderr] 216 |     pub fn unexpected_token_many<T>(token: Token, expected: Vec<Terminal>, r: &mut dyn CharReader) -> Result<T, Error> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `End`
[INFO] [stderr]    --> src/serial/fmt/json.rs:227:5
[INFO] [stderr]     |
[INFO] [stderr] 227 |     End,
[INFO] [stderr]     |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `BraceLeft`
[INFO] [stderr]    --> src/serial/fmt/json.rs:229:5
[INFO] [stderr]     |
[INFO] [stderr] 229 |     BraceLeft,
[INFO] [stderr]     |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `BraceRight`
[INFO] [stderr]    --> src/serial/fmt/json.rs:231:5
[INFO] [stderr]     |
[INFO] [stderr] 231 |     BraceRight,
[INFO] [stderr]     |     ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `BracketLeft`
[INFO] [stderr]    --> src/serial/fmt/json.rs:233:5
[INFO] [stderr]     |
[INFO] [stderr] 233 |     BracketLeft,
[INFO] [stderr]     |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `BracketRight`
[INFO] [stderr]    --> src/serial/fmt/json.rs:235:5
[INFO] [stderr]     |
[INFO] [stderr] 235 |     BracketRight,
[INFO] [stderr]     |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Colon`
[INFO] [stderr]    --> src/serial/fmt/json.rs:237:5
[INFO] [stderr]     |
[INFO] [stderr] 237 |     Colon,
[INFO] [stderr]     |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Comma`
[INFO] [stderr]    --> src/serial/fmt/json.rs:239:5
[INFO] [stderr]     |
[INFO] [stderr] 239 |     Comma,
[INFO] [stderr]     |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Literal`
[INFO] [stderr]    --> src/serial/fmt/json.rs:241:5
[INFO] [stderr]     |
[INFO] [stderr] 241 |     Literal,
[INFO] [stderr]     |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Integer`
[INFO] [stderr]    --> src/serial/fmt/json.rs:243:5
[INFO] [stderr]     |
[INFO] [stderr] 243 |     Integer,
[INFO] [stderr]     |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Float`
[INFO] [stderr]    --> src/serial/fmt/json.rs:245:5
[INFO] [stderr]     |
[INFO] [stderr] 245 |     Float,
[INFO] [stderr]     |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `True`
[INFO] [stderr]    --> src/serial/fmt/json.rs:247:5
[INFO] [stderr]     |
[INFO] [stderr] 247 |     True,
[INFO] [stderr]     |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `False`
[INFO] [stderr]    --> src/serial/fmt/json.rs:249:5
[INFO] [stderr]     |
[INFO] [stderr] 249 |     False,
[INFO] [stderr]     |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Null`
[INFO] [stderr]    --> src/serial/fmt/json.rs:251:5
[INFO] [stderr]     |
[INFO] [stderr] 251 |     Null,
[INFO] [stderr]     |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `lex`
[INFO] [stderr]    --> src/serial/fmt/json.rs:271:5
[INFO] [stderr]     |
[INFO] [stderr] 271 |     fn lex(&mut self, r: &mut dyn CharReader) -> Result<Token, Error> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `process_scientific_notation`
[INFO] [stderr]    --> src/serial/fmt/json.rs:273:9
[INFO] [stderr]     |
[INFO] [stderr] 273 |         fn process_scientific_notation(r: &mut dyn CharReader, p1: Position) -> Result<Token, Error> {
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `consume`
[INFO] [stderr]    --> src/serial/fmt/json.rs:302:9
[INFO] [stderr]     |
[INFO] [stderr] 302 |         fn consume(r: &mut dyn CharReader, count: usize, term: Terminal) -> Result<Token, Error> {
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `next_token`
[INFO] [stderr]    --> src/serial/fmt/json.rs:390:5
[INFO] [stderr]     |
[INFO] [stderr] 390 |     fn next_token(&mut self, r: &mut dyn CharReader) -> Result<Token, Error> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `push_token`
[INFO] [stderr]    --> src/serial/fmt/json.rs:398:5
[INFO] [stderr]     |
[INFO] [stderr] 398 |     fn push_token(&mut self, t: Token) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `expect_token`
[INFO] [stderr]    --> src/serial/fmt/json.rs:402:5
[INFO] [stderr]     |
[INFO] [stderr] 402 |     fn expect_token(&mut self, r: &mut dyn CharReader, term: Terminal) -> Result<Token, Error> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `parse`
[INFO] [stderr]    --> src/serial/fmt/json.rs:411:5
[INFO] [stderr]     |
[INFO] [stderr] 411 |     pub fn parse(&mut self, r: &mut dyn CharReader) -> Result<NodeRef, Error> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `parse_value`
[INFO] [stderr]    --> src/serial/fmt/json.rs:416:5
[INFO] [stderr]     |
[INFO] [stderr] 416 |     fn parse_value(&mut self, r: &mut dyn CharReader) -> Result<NodeRef, Error> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `parse_object`
[INFO] [stderr]    --> src/serial/fmt/json.rs:465:5
[INFO] [stderr]     |
[INFO] [stderr] 465 |     fn parse_object(&mut self, r: &mut dyn CharReader) -> Result<NodeRef, Error> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `parse_array`
[INFO] [stderr]    --> src/serial/fmt/json.rs:499:5
[INFO] [stderr]     |
[INFO] [stderr] 499 |     fn parse_array(&mut self, r: &mut dyn CharReader) -> Result<NodeRef, Error> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `parse_literal`
[INFO] [stderr]    --> src/serial/fmt/json.rs:527:5
[INFO] [stderr]     |
[INFO] [stderr] 527 |     fn parse_literal<'a>(&mut self, t: Token, r: &'a mut dyn CharReader) -> Result<(), Error> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_non_alphanumeric`
[INFO] [stderr]  --> src/serial/fmt/mod.rs:8:1
[INFO] [stderr]   |
[INFO] [stderr] 8 | fn is_non_alphanumeric(c: Option<char>) -> bool {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]     --> src/opath/expr/func.rs:1387:17
[INFO] [stderr]      |
[INFO] [stderr] 1387 |             let mut res = expr.apply(&n, &n).unwrap();
[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: method is never used: `with_span`
[INFO] [stderr]    --> src/tree/mod.rs:863:5
[INFO] [stderr]     |
[INFO] [stderr] 863 |     pub (crate) fn with_span(self, span: Span) -> NodeRef {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `set_span_from`
[INFO] [stderr]    --> src/tree/mod.rs:868:5
[INFO] [stderr]     |
[INFO] [stderr] 868 |     pub (crate) fn set_span_from(&self, from: Position) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `set_span_to`
[INFO] [stderr]    --> src/tree/mod.rs:875:5
[INFO] [stderr]     |
[INFO] [stderr] 875 |     pub (crate) fn set_span_to(&self, to: Position) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `PlainErr`
[INFO] [stderr]     --> src/opath/expr/func.rs:1345:13
[INFO] [stderr]      |
[INFO] [stderr] 1345 |             PlainErr { name: String },
[INFO] [stderr]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `TestErr`
[INFO] [stderr]     --> src/opath/expr/func.rs:1356:13
[INFO] [stderr]      |
[INFO] [stderr] 1356 |             TestErr { err: Box<dyn Diag> },
[INFO] [stderr]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type alias is never used: `Error`
[INFO] [stderr]  --> src/serial/fmt/json.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub type Error = ParseDiag;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `ParseErr`
[INFO] [stderr]   --> src/serial/fmt/json.rs:14:1
[INFO] [stderr]    |
[INFO] [stderr] 14 | pub enum ParseErr {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `invalid_escape`
[INFO] [stderr]   --> src/serial/fmt/json.rs:91:5
[INFO] [stderr]    |
[INFO] [stderr] 91 |     pub fn invalid_escape<T>(r: &mut dyn CharReader) -> Result<T, Error> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `invalid_input`
[INFO] [stderr]    --> src/serial/fmt/json.rs:114:5
[INFO] [stderr]     |
[INFO] [stderr] 114 |     pub fn invalid_input<T>(r: &mut dyn CharReader) -> Result<T, Error> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `invalid_input_one`
[INFO] [stderr]    --> src/serial/fmt/json.rs:138:5
[INFO] [stderr]     |
[INFO] [stderr] 138 |     pub fn invalid_input_one<T>(r: &mut dyn CharReader, expected: char) -> Result<T, Error> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `invalid_input_many`
[INFO] [stderr]    --> src/serial/fmt/json.rs:164:5
[INFO] [stderr]     |
[INFO] [stderr] 164 |     pub fn invalid_input_many<T>(r: &mut dyn CharReader, expected: Vec<char>) -> Result<T, Error> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `unexpected_eoi_str`
[INFO] [stderr]    --> src/serial/fmt/json.rs:191:5
[INFO] [stderr]     |
[INFO] [stderr] 191 |     pub fn unexpected_eoi_str<T>(r: &mut dyn CharReader, expected: String) -> Result<T, Error> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `unexpected_token`
[INFO] [stderr]    --> src/serial/fmt/json.rs:202:5
[INFO] [stderr]     |
[INFO] [stderr] 202 |     pub fn unexpected_token<T>(token: Token, r: &mut dyn CharReader) -> Result<T, Error> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `unexpected_token_one`
[INFO] [stderr]    --> src/serial/fmt/json.rs:209:5
[INFO] [stderr]     |
[INFO] [stderr] 209 |     pub fn unexpected_token_one<T>(token: Token, expected: Terminal, r: &mut dyn CharReader) -> Result<T, Error> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `unexpected_token_many`
[INFO] [stderr]    --> src/serial/fmt/json.rs:216:5
[INFO] [stderr]     |
[INFO] [stderr] 216 |     pub fn unexpected_token_many<T>(token: Token, expected: Vec<Terminal>, r: &mut dyn CharReader) -> Result<T, Error> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `End`
[INFO] [stderr]    --> src/serial/fmt/json.rs:227:5
[INFO] [stderr]     |
[INFO] [stderr] 227 |     End,
[INFO] [stderr]     |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `BraceLeft`
[INFO] [stderr]    --> src/serial/fmt/json.rs:229:5
[INFO] [stderr]     |
[INFO] [stderr] 229 |     BraceLeft,
[INFO] [stderr]     |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `BraceRight`
[INFO] [stderr]    --> src/serial/fmt/json.rs:231:5
[INFO] [stderr]     |
[INFO] [stderr] 231 |     BraceRight,
[INFO] [stderr]     |     ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `BracketLeft`
[INFO] [stderr]    --> src/serial/fmt/json.rs:233:5
[INFO] [stderr]     |
[INFO] [stderr] 233 |     BracketLeft,
[INFO] [stderr]     |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `BracketRight`
[INFO] [stderr]    --> src/serial/fmt/json.rs:235:5
[INFO] [stderr]     |
[INFO] [stderr] 235 |     BracketRight,
[INFO] [stderr]     |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Colon`
[INFO] [stderr]    --> src/serial/fmt/json.rs:237:5
[INFO] [stderr]     |
[INFO] [stderr] 237 |     Colon,
[INFO] [stderr]     |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Comma`
[INFO] [stderr]    --> src/serial/fmt/json.rs:239:5
[INFO] [stderr]     |
[INFO] [stderr] 239 |     Comma,
[INFO] [stderr]     |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Literal`
[INFO] [stderr]    --> src/serial/fmt/json.rs:241:5
[INFO] [stderr]     |
[INFO] [stderr] 241 |     Literal,
[INFO] [stderr]     |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Integer`
[INFO] [stderr]    --> src/serial/fmt/json.rs:243:5
[INFO] [stderr]     |
[INFO] [stderr] 243 |     Integer,
[INFO] [stderr]     |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Float`
[INFO] [stderr]    --> src/serial/fmt/json.rs:245:5
[INFO] [stderr]     |
[INFO] [stderr] 245 |     Float,
[INFO] [stderr]     |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `True`
[INFO] [stderr]    --> src/serial/fmt/json.rs:247:5
[INFO] [stderr]     |
[INFO] [stderr] 247 |     True,
[INFO] [stderr]     |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `False`
[INFO] [stderr]    --> src/serial/fmt/json.rs:249:5
[INFO] [stderr]     |
[INFO] [stderr] 249 |     False,
[INFO] [stderr]     |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Null`
[INFO] [stderr]    --> src/serial/fmt/json.rs:251:5
[INFO] [stderr]     |
[INFO] [stderr] 251 |     Null,
[INFO] [stderr]     |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `lex`
[INFO] [stderr]    --> src/serial/fmt/json.rs:271:5
[INFO] [stderr]     |
[INFO] [stderr] 271 |     fn lex(&mut self, r: &mut dyn CharReader) -> Result<Token, Error> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `process_scientific_notation`
[INFO] [stderr]    --> src/serial/fmt/json.rs:273:9
[INFO] [stderr]     |
[INFO] [stderr] 273 |         fn process_scientific_notation(r: &mut dyn CharReader, p1: Position) -> Result<Token, Error> {
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `consume`
[INFO] [stderr]    --> src/serial/fmt/json.rs:302:9
[INFO] [stderr]     |
[INFO] [stderr] 302 |         fn consume(r: &mut dyn CharReader, count: usize, term: Terminal) -> Result<Token, Error> {
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `next_token`
[INFO] [stderr]    --> src/serial/fmt/json.rs:390:5
[INFO] [stderr]     |
[INFO] [stderr] 390 |     fn next_token(&mut self, r: &mut dyn CharReader) -> Result<Token, Error> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `push_token`
[INFO] [stderr]    --> src/serial/fmt/json.rs:398:5
[INFO] [stderr]     |
[INFO] [stderr] 398 |     fn push_token(&mut self, t: Token) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `expect_token`
[INFO] [stderr]    --> src/serial/fmt/json.rs:402:5
[INFO] [stderr]     |
[INFO] [stderr] 402 |     fn expect_token(&mut self, r: &mut dyn CharReader, term: Terminal) -> Result<Token, Error> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `parse`
[INFO] [stderr]    --> src/serial/fmt/json.rs:411:5
[INFO] [stderr]     |
[INFO] [stderr] 411 |     pub fn parse(&mut self, r: &mut dyn CharReader) -> Result<NodeRef, Error> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `parse_value`
[INFO] [stderr]    --> src/serial/fmt/json.rs:416:5
[INFO] [stderr]     |
[INFO] [stderr] 416 |     fn parse_value(&mut self, r: &mut dyn CharReader) -> Result<NodeRef, Error> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `parse_object`
[INFO] [stderr]    --> src/serial/fmt/json.rs:465:5
[INFO] [stderr]     |
[INFO] [stderr] 465 |     fn parse_object(&mut self, r: &mut dyn CharReader) -> Result<NodeRef, Error> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `parse_array`
[INFO] [stderr]    --> src/serial/fmt/json.rs:499:5
[INFO] [stderr]     |
[INFO] [stderr] 499 |     fn parse_array(&mut self, r: &mut dyn CharReader) -> Result<NodeRef, Error> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `parse_literal`
[INFO] [stderr]    --> src/serial/fmt/json.rs:527:5
[INFO] [stderr]     |
[INFO] [stderr] 527 |     fn parse_literal<'a>(&mut self, t: Token, r: &'a mut dyn CharReader) -> Result<(), Error> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_non_alphanumeric`
[INFO] [stderr]  --> src/serial/fmt/mod.rs:8:1
[INFO] [stderr]   |
[INFO] [stderr] 8 | fn is_non_alphanumeric(c: Option<char>) -> bool {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/opath/matcher.rs:115:9
[INFO] [stderr]     |
[INFO] [stderr] 115 |         m.resolve(&expr, &n, &n);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/opath/matcher.rs:128:9
[INFO] [stderr]     |
[INFO] [stderr] 128 |         m.resolve_cache(&expr, &n, &n, &mut cache);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/opath/resolve.rs:145:9
[INFO] [stderr]     |
[INFO] [stderr] 145 |         r.resolve(&n);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `res`
[INFO] [stderr]   --> tests/tests/math_ops/add.rs:24:9
[INFO] [stderr]    |
[INFO] [stderr] 24 |     let res = results.get(0).unwrap(); // TODO ws assertion
[INFO] [stderr]    |         ^^^ help: consider prefixing with an underscore: `_res`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 59.89s
[INFO] running `"docker" "inspect" "4f9a0faad79a03b7d8ae79a93b513ffec1d0231fac73c65cf341bba9318fc4c9"`
[INFO] running `"docker" "rm" "-f" "4f9a0faad79a03b7d8ae79a93b513ffec1d0231fac73c65cf341bba9318fc4c9"`
[INFO] [stdout] 4f9a0faad79a03b7d8ae79a93b513ffec1d0231fac73c65cf341bba9318fc4c9