[INFO] cloning repository https://github.com/tqma113/json_parser
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tqma113/json_parser" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftqma113%2Fjson_parser", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftqma113%2Fjson_parser'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7c6fab0d27c40fd2a068247eb6464063baa5a7f6
[INFO] checking tqma113/json_parser against try#6757d700f93f6d16c8b39cf79e96b019bd570e7d for pr-155299
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftqma113%2Fjson_parser" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/tqma113/json_parser
[INFO] finished tweaking git repo https://github.com/tqma113/json_parser
[INFO] tweaked toml for git repo https://github.com/tqma113/json_parser written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/tqma113/json_parser on toolchain 6757d700f93f6d16c8b39cf79e96b019bd570e7d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6757d700f93f6d16c8b39cf79e96b019bd570e7d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/tqma113/json_parser already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6757d700f93f6d16c8b39cf79e96b019bd570e7d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+6757d700f93f6d16c8b39cf79e96b019bd570e7d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 77f38ef18ff5b8b74ee157ba3ec1e6d2c71716bf65fe025da9832f31622d67f6
[INFO] running `Command { std: "docker" "start" "-a" "77f38ef18ff5b8b74ee157ba3ec1e6d2c71716bf65fe025da9832f31622d67f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "77f38ef18ff5b8b74ee157ba3ec1e6d2c71716bf65fe025da9832f31622d67f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "77f38ef18ff5b8b74ee157ba3ec1e6d2c71716bf65fe025da9832f31622d67f6", kill_on_drop: false }`
[INFO] [stdout] 77f38ef18ff5b8b74ee157ba3ec1e6d2c71716bf65fe025da9832f31622d67f6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+6757d700f93f6d16c8b39cf79e96b019bd570e7d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 70047cb3c064980004ff7cac0393abb969b4fdc57154bcc3ddddfb4822d5be34
[INFO] running `Command { std: "docker" "start" "-a" "70047cb3c064980004ff7cac0393abb969b4fdc57154bcc3ddddfb4822d5be34", kill_on_drop: false }`
[INFO] [stderr]     Checking json_parser v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/json/de.rs:416:21
[INFO] [stdout]     |
[INFO] [stdout] 416 |                        break match self.match_digit() {
[INFO] [stdout]     |  ______________________^     -
[INFO] [stdout]     | | ___________________________|
[INFO] [stdout] 417 | ||                         Ok(c) => {
[INFO] [stdout] 418 | ||                             match c.to_digit(10) {
[INFO] [stdout] 419 | ||                                 Some(n) => {
[INFO] [stdout] ...   ||
[INFO] [stdout] 431 | ||                     }
[INFO] [stdout]     | ||                     ^
[INFO] [stdout]     | ||_____________________|
[INFO] [stdout]     |  |_____________________unreachable expression
[INFO] [stdout]     |                        any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/json/de.rs:416:21
[INFO] [stdout]     |
[INFO] [stdout] 416 |                        break match self.match_digit() {
[INFO] [stdout]     |  ______________________^     -
[INFO] [stdout]     | | ___________________________|
[INFO] [stdout] 417 | ||                         Ok(c) => {
[INFO] [stdout] 418 | ||                             match c.to_digit(10) {
[INFO] [stdout] 419 | ||                                 Some(n) => {
[INFO] [stdout] ...   ||
[INFO] [stdout] 431 | ||                     }
[INFO] [stdout]     | ||                     ^
[INFO] [stdout]     | ||_____________________|
[INFO] [stdout]     |  |_____________________unreachable expression
[INFO] [stdout]     |                        any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `message`
[INFO] [stdout]    --> src/json/de.rs:144:29
[INFO] [stdout]     |
[INFO] [stdout] 144 |                         Err(message) => {
[INFO] [stdout]     |                             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_message`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `message`
[INFO] [stdout]    --> src/json/de.rs:207:29
[INFO] [stdout]     |
[INFO] [stdout] 207 |                         Err(message) => {
[INFO] [stdout]     |                             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_message`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `code`
[INFO] [stdout]    --> src/json/de.rs:214:28
[INFO] [stdout]     |
[INFO] [stdout] 214 |                         Ok(code) => {
[INFO] [stdout]     |                            ^^^^ help: if this is intentional, prefix it with an underscore: `_code`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `message`
[INFO] [stdout]    --> src/json/de.rs:232:17
[INFO] [stdout]     |
[INFO] [stdout] 232 |             Err(message) => {
[INFO] [stdout]     |                 ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_message`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `message`
[INFO] [stdout]    --> src/json/de.rs:305:29
[INFO] [stdout]     |
[INFO] [stdout] 305 |                         Err(message) => {
[INFO] [stdout]     |                             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_message`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]    --> src/json/de.rs:327:18
[INFO] [stdout]     |
[INFO] [stdout] 327 |             Some(c) => {
[INFO] [stdout]     |                  ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `message`
[INFO] [stdout]    --> src/json/de.rs:336:29
[INFO] [stdout]     |
[INFO] [stdout] 336 |                         Err(message) => {
[INFO] [stdout]     |                             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_message`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]    --> src/json/de.rs:352:18
[INFO] [stdout]     |
[INFO] [stdout] 352 |             Some(c) => {
[INFO] [stdout]     |                  ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `message`
[INFO] [stdout]    --> src/json/de.rs:373:37
[INFO] [stdout]     |
[INFO] [stdout] 373 | ...                   Err(message) => {
[INFO] [stdout]     |                           ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_message`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/json/de.rs:412:21
[INFO] [stdout]     |
[INFO] [stdout] 412 |                 let mut count: u16 = 0;
[INFO] [stdout]     |                     ----^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]    --> src/json/de.rs:410:18
[INFO] [stdout]     |
[INFO] [stdout] 410 |             Some(c) => {
[INFO] [stdout]     |                  ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]    --> src/json/de.rs:442:16
[INFO] [stdout]     |
[INFO] [stdout] 442 |             Ok(c) => {
[INFO] [stdout]     |                ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Element` is never constructed
[INFO] [stdout]  --> src/json/element.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Element {
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Value` is never used
[INFO] [stdout]   --> src/json/value/mod.rs:10:10
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub enum Value {
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple methods are never used
[INFO] [stdout]   --> src/json/value/mod.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 19 | impl Value {
[INFO] [stdout]    | ---------- methods in this implementation
[INFO] [stdout] 20 |     pub fn index_into<I: Index>(&self, i: I) -> Option<&Value> {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 24 |     pub fn is_null(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 31 |     pub fn as_boolean(&self) -> Option<bool> {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 38 |     pub fn is_boolean(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 45 |     pub fn as_number(&self) -> Option<&Number> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 52 |     pub fn is_number(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 59 |     pub fn as_str(&self) -> Option<&str> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 66 |     pub fn is_string(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 73 |     pub fn as_array(&self) -> Option<&Vec<Value>> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 80 |     pub fn is_array(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 87 |     pub fn as_object(&self) -> Option<&HashMap<String, Value>> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 94 |     pub fn is_object(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Number` is never constructed
[INFO] [stdout]  --> src/json/value/number.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Number {
[INFO] [stdout]   |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Num` is never used
[INFO] [stdout]  --> src/json/value/number.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub enum Num {
[INFO] [stdout]   |          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Index` is never used
[INFO] [stdout]  --> src/json/value/index.rs:3:11
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub trait Index {
[INFO] [stdout]   |           ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `De` is never constructed
[INFO] [stdout]  --> src/json/de.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub struct De<'a> {
[INFO] [stdout]   |            ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/json/de.rs:14:12
[INFO] [stdout]     |
[INFO] [stdout]  13 | impl De<'_> {
[INFO] [stdout]     | ----------- associated items in this implementation
[INFO] [stdout]  14 |     pub fn new(str: &String) -> De {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout]  21 |     pub fn deserialization(&mut self) -> Result<Value, String> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  26 |     pub fn next(&mut self) -> Option<char> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout]  31 |     pub fn ignore_space(&mut self) {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  47 |     pub fn match_value(&mut self) -> Result<Value, String> {
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 163 |     pub fn match_object(&mut self) -> Result<Value, String> {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 195 |     pub fn match_members(&mut self) -> Result<HashMap<String, Value>, String> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 226 |     pub fn match_member(&mut self) -> Result<(String, Value), Result<u8, String>> {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 262 |     pub fn match_array(&mut self) -> Result<Value, String> {
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 293 |     pub fn match_elements(&mut self) -> Result<Vec<Value>, String> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 317 |     pub fn match_element(&mut self) -> Result<Value, String> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 325 |     pub fn match_string(&mut self) -> Result<String, String> {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 350 |     pub fn match_number(&mut self) -> Result<Number, String> {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 408 |     pub fn match_integer(&mut self) -> Result<u32, String> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 440 |     pub fn match_true(&mut self) -> Result<bool, String> {
[INFO] [stdout]     |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 470 |     pub fn match_letter(&mut self) -> Result<char, String> {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 485 |     pub fn match_digit(&mut self) -> Result<char, String> {
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 500 |     pub fn match_spec_char(&mut self, ic: char) -> Result<char, String> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/json/de.rs:14:21
[INFO] [stdout]    |
[INFO] [stdout] 14 |     pub fn new(str: &String) -> De {
[INFO] [stdout]    |                     ^^^^^^^     ^^ the same lifetime is hidden here
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 14 |     pub fn new(str: &String) -> De<'_> {
[INFO] [stdout]    |                                   ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/json/de.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |         &self.next();
[INFO] [stdout]    |         ^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 22 |         let _ = &self.next();
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `message`
[INFO] [stdout]    --> src/json/de.rs:144:29
[INFO] [stdout]     |
[INFO] [stdout] 144 |                         Err(message) => {
[INFO] [stdout]     |                             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_message`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `message`
[INFO] [stdout]    --> src/json/de.rs:207:29
[INFO] [stdout]     |
[INFO] [stdout] 207 |                         Err(message) => {
[INFO] [stdout]     |                             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_message`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `code`
[INFO] [stdout]    --> src/json/de.rs:214:28
[INFO] [stdout]     |
[INFO] [stdout] 214 |                         Ok(code) => {
[INFO] [stdout]     |                            ^^^^ help: if this is intentional, prefix it with an underscore: `_code`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `message`
[INFO] [stdout]    --> src/json/de.rs:232:17
[INFO] [stdout]     |
[INFO] [stdout] 232 |             Err(message) => {
[INFO] [stdout]     |                 ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_message`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `message`
[INFO] [stdout]    --> src/json/de.rs:305:29
[INFO] [stdout]     |
[INFO] [stdout] 305 |                         Err(message) => {
[INFO] [stdout]     |                             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_message`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]    --> src/json/de.rs:327:18
[INFO] [stdout]     |
[INFO] [stdout] 327 |             Some(c) => {
[INFO] [stdout]     |                  ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `message`
[INFO] [stdout]    --> src/json/de.rs:336:29
[INFO] [stdout]     |
[INFO] [stdout] 336 |                         Err(message) => {
[INFO] [stdout]     |                             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_message`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]    --> src/json/de.rs:352:18
[INFO] [stdout]     |
[INFO] [stdout] 352 |             Some(c) => {
[INFO] [stdout]     |                  ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `message`
[INFO] [stdout]    --> src/json/de.rs:373:37
[INFO] [stdout]     |
[INFO] [stdout] 373 | ...                   Err(message) => {
[INFO] [stdout]     |                           ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_message`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/json/de.rs:412:21
[INFO] [stdout]     |
[INFO] [stdout] 412 |                 let mut count: u16 = 0;
[INFO] [stdout]     |                     ----^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]    --> src/json/de.rs:410:18
[INFO] [stdout]     |
[INFO] [stdout] 410 |             Some(c) => {
[INFO] [stdout]     |                  ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]    --> src/json/de.rs:442:16
[INFO] [stdout]     |
[INFO] [stdout] 442 |             Ok(c) => {
[INFO] [stdout]     |                ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Element` is never constructed
[INFO] [stdout]  --> src/json/element.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Element {
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Value` is never used
[INFO] [stdout]   --> src/json/value/mod.rs:10:10
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub enum Value {
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple methods are never used
[INFO] [stdout]   --> src/json/value/mod.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 19 | impl Value {
[INFO] [stdout]    | ---------- methods in this implementation
[INFO] [stdout] 20 |     pub fn index_into<I: Index>(&self, i: I) -> Option<&Value> {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 24 |     pub fn is_null(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 31 |     pub fn as_boolean(&self) -> Option<bool> {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 38 |     pub fn is_boolean(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 45 |     pub fn as_number(&self) -> Option<&Number> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 52 |     pub fn is_number(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 59 |     pub fn as_str(&self) -> Option<&str> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 66 |     pub fn is_string(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 73 |     pub fn as_array(&self) -> Option<&Vec<Value>> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 80 |     pub fn is_array(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 87 |     pub fn as_object(&self) -> Option<&HashMap<String, Value>> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 94 |     pub fn is_object(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Number` is never constructed
[INFO] [stdout]  --> src/json/value/number.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Number {
[INFO] [stdout]   |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Num` is never used
[INFO] [stdout]  --> src/json/value/number.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub enum Num {
[INFO] [stdout]   |          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Index` is never used
[INFO] [stdout]  --> src/json/value/index.rs:3:11
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub trait Index {
[INFO] [stdout]   |           ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `De` is never constructed
[INFO] [stdout]  --> src/json/de.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub struct De<'a> {
[INFO] [stdout]   |            ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/json/de.rs:14:12
[INFO] [stdout]     |
[INFO] [stdout]  13 | impl De<'_> {
[INFO] [stdout]     | ----------- associated items in this implementation
[INFO] [stdout]  14 |     pub fn new(str: &String) -> De {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout]  21 |     pub fn deserialization(&mut self) -> Result<Value, String> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  26 |     pub fn next(&mut self) -> Option<char> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout]  31 |     pub fn ignore_space(&mut self) {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  47 |     pub fn match_value(&mut self) -> Result<Value, String> {
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 163 |     pub fn match_object(&mut self) -> Result<Value, String> {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 195 |     pub fn match_members(&mut self) -> Result<HashMap<String, Value>, String> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 226 |     pub fn match_member(&mut self) -> Result<(String, Value), Result<u8, String>> {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 262 |     pub fn match_array(&mut self) -> Result<Value, String> {
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 293 |     pub fn match_elements(&mut self) -> Result<Vec<Value>, String> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 317 |     pub fn match_element(&mut self) -> Result<Value, String> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 325 |     pub fn match_string(&mut self) -> Result<String, String> {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 350 |     pub fn match_number(&mut self) -> Result<Number, String> {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 408 |     pub fn match_integer(&mut self) -> Result<u32, String> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 440 |     pub fn match_true(&mut self) -> Result<bool, String> {
[INFO] [stdout]     |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 470 |     pub fn match_letter(&mut self) -> Result<char, String> {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 485 |     pub fn match_digit(&mut self) -> Result<char, String> {
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 500 |     pub fn match_spec_char(&mut self, ic: char) -> Result<char, String> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/json/de.rs:14:21
[INFO] [stdout]    |
[INFO] [stdout] 14 |     pub fn new(str: &String) -> De {
[INFO] [stdout]    |                     ^^^^^^^     ^^ the same lifetime is hidden here
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 14 |     pub fn new(str: &String) -> De<'_> {
[INFO] [stdout]    |                                   ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/json/de.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |         &self.next();
[INFO] [stdout]    |         ^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 22 |         let _ = &self.next();
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.12s
[INFO] running `Command { std: "docker" "inspect" "70047cb3c064980004ff7cac0393abb969b4fdc57154bcc3ddddfb4822d5be34", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "70047cb3c064980004ff7cac0393abb969b4fdc57154bcc3ddddfb4822d5be34", kill_on_drop: false }`
[INFO] [stdout] 70047cb3c064980004ff7cac0393abb969b4fdc57154bcc3ddddfb4822d5be34
