[INFO] cloning repository https://github.com/vlad-onis/json_parser_rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/vlad-onis/json_parser_rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvlad-onis%2Fjson_parser_rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvlad-onis%2Fjson_parser_rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d4568c453cffb35e088218b6823943e6120bd1d6
[INFO] checking vlad-onis/json_parser_rs against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvlad-onis%2Fjson_parser_rs" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/vlad-onis/json_parser_rs
[INFO] removed 0 missing tests
[INFO] finished tweaking git repo https://github.com/vlad-onis/json_parser_rs
[INFO] tweaked toml for git repo https://github.com/vlad-onis/json_parser_rs written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/vlad-onis/json_parser_rs on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/vlad-onis/json_parser_rs 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8c3a03dc405acd147d0e85619b5819078544d40a940dda8ff0030de937fdf003
[INFO] running `Command { std: "docker" "start" "-a" "8c3a03dc405acd147d0e85619b5819078544d40a940dda8ff0030de937fdf003", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8c3a03dc405acd147d0e85619b5819078544d40a940dda8ff0030de937fdf003", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8c3a03dc405acd147d0e85619b5819078544d40a940dda8ff0030de937fdf003", kill_on_drop: false }`
[INFO] [stdout] 8c3a03dc405acd147d0e85619b5819078544d40a940dda8ff0030de937fdf003
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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 -Dunmustuse_in_always_ok" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 74ab27f91204e6a8f68dda9a28124c93f4270163aa64fb765939b047ea9c3a54
[INFO] running `Command { std: "docker" "start" "-a" "74ab27f91204e6a8f68dda9a28124c93f4270163aa64fb765939b047ea9c3a54", kill_on_drop: false }`
[INFO] [stderr]    Compiling thiserror v1.0.44
[INFO] [stderr]    Compiling syn v2.0.27
[INFO] [stderr]    Compiling thiserror-impl v1.0.44
[INFO] [stderr]     Checking json_parser_rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/json/syntactic_analyzer.rs:98:21
[INFO] [stdout]    |
[INFO] [stdout] 98 | pub fn parse_object(mut token_stream: &mut [Token]) -> Result<JsonValue, ParseError> {
[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: value assigned to `token_stream` is never read
[INFO] [stdout]    --> src/json/syntactic_analyzer.rs:115:17
[INFO] [stdout]     |
[INFO] [stdout] 115 |                 token_stream = &mut token_stream[1..];
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: you might have meant to mutate the pointed at value being passed in, instead of changing the reference in the local binding
[INFO] [stdout]     |
[INFO] [stdout] 103 ~ pub fn parse_object_members(token_stream: &mut [Token]) -> Result<Vec<JsonPair>, ParseError> {
[INFO] [stdout] 104 |     let mut pair_index = 0;
[INFO] [stdout] ...
[INFO] [stdout] 114 |             Err(ParseError::EmptyObject) => {
[INFO] [stdout] 115 ~                 *token_stream = token_stream[1..];
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `token_stream`
[INFO] [stdout]    --> src/json/syntactic_analyzer.rs:164:20
[INFO] [stdout]     |
[INFO] [stdout] 164 | pub fn parse_array(token_stream: &Vec<Token>, current_index: usize) {
[INFO] [stdout]     |                    ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_token_stream`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `current_index`
[INFO] [stdout]    --> src/json/syntactic_analyzer.rs:164:47
[INFO] [stdout]     |
[INFO] [stdout] 164 | pub fn parse_array(token_stream: &Vec<Token>, current_index: usize) {
[INFO] [stdout]     |                                               ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_current_index`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `token_stream`
[INFO] [stdout]    --> src/json/syntactic_analyzer.rs:168:29
[INFO] [stdout]     |
[INFO] [stdout] 168 | pub fn parse_array_elements(token_stream: &Vec<Token>, current_index: usize) {
[INFO] [stdout]     |                             ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_token_stream`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `current_index`
[INFO] [stdout]    --> src/json/syntactic_analyzer.rs:168:56
[INFO] [stdout]     |
[INFO] [stdout] 168 | pub fn parse_array_elements(token_stream: &Vec<Token>, current_index: usize) {
[INFO] [stdout]     |                                                        ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_current_index`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `parse`
[INFO] [stdout]  --> tests/integration_tests.rs:8:36
[INFO] [stdout]   |
[INFO] [stdout] 8 |         syntactic_analyzer::{self, parse, JsonPair, JsonValue, ParseError},
[INFO] [stdout]   |                                    ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/json/syntactic_analyzer.rs:98:21
[INFO] [stdout]    |
[INFO] [stdout] 98 | pub fn parse_object(mut token_stream: &mut [Token]) -> Result<JsonValue, ParseError> {
[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: value assigned to `token_stream` is never read
[INFO] [stdout]    --> src/json/syntactic_analyzer.rs:115:17
[INFO] [stdout]     |
[INFO] [stdout] 115 |                 token_stream = &mut token_stream[1..];
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: you might have meant to mutate the pointed at value being passed in, instead of changing the reference in the local binding
[INFO] [stdout]     |
[INFO] [stdout] 103 ~ pub fn parse_object_members(token_stream: &mut [Token]) -> Result<Vec<JsonPair>, ParseError> {
[INFO] [stdout] 104 |     let mut pair_index = 0;
[INFO] [stdout] ...
[INFO] [stdout] 114 |             Err(ParseError::EmptyObject) => {
[INFO] [stdout] 115 ~                 *token_stream = token_stream[1..];
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `token_stream`
[INFO] [stdout]    --> src/json/syntactic_analyzer.rs:164:20
[INFO] [stdout]     |
[INFO] [stdout] 164 | pub fn parse_array(token_stream: &Vec<Token>, current_index: usize) {
[INFO] [stdout]     |                    ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_token_stream`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `current_index`
[INFO] [stdout]    --> src/json/syntactic_analyzer.rs:164:47
[INFO] [stdout]     |
[INFO] [stdout] 164 | pub fn parse_array(token_stream: &Vec<Token>, current_index: usize) {
[INFO] [stdout]     |                                               ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_current_index`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `token_stream`
[INFO] [stdout]    --> src/json/syntactic_analyzer.rs:168:29
[INFO] [stdout]     |
[INFO] [stdout] 168 | pub fn parse_array_elements(token_stream: &Vec<Token>, current_index: usize) {
[INFO] [stdout]     |                             ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_token_stream`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `current_index`
[INFO] [stdout]    --> src/json/syntactic_analyzer.rs:168:56
[INFO] [stdout]     |
[INFO] [stdout] 168 | pub fn parse_array_elements(token_stream: &Vec<Token>, current_index: usize) {
[INFO] [stdout]     |                                                        ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_current_index`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<lexer::Token, Infallible>
[INFO] [stdout]    --> src/json/lexer.rs:387:29
[INFO] [stdout]     |
[INFO] [stdout] 387 |         let expected = vec!['{'.try_into().unwrap(), '}'.try_into().unwrap()];
[INFO] [stdout]     |                             ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<lexer::Token, Infallible>
[INFO] [stdout]    --> src/json/lexer.rs:387:54
[INFO] [stdout]     |
[INFO] [stdout] 387 |         let expected = vec!['{'.try_into().unwrap(), '}'.try_into().unwrap()];
[INFO] [stdout]     |                                                      ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<lexer::Token, Infallible>
[INFO] [stdout]    --> src/json/lexer.rs:403:13
[INFO] [stdout]     |
[INFO] [stdout] 403 |             '{'.try_into().unwrap(),
[INFO] [stdout]     |             ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<lexer::Token, Infallible>
[INFO] [stdout]    --> src/json/lexer.rs:405:13
[INFO] [stdout]     |
[INFO] [stdout] 405 |             ':'.try_into().unwrap(),
[INFO] [stdout]     |             ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<lexer::Token, Infallible>
[INFO] [stdout]    --> src/json/lexer.rs:407:13
[INFO] [stdout]     |
[INFO] [stdout] 407 |             '}'.try_into().unwrap(),
[INFO] [stdout]     |             ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<lexer::Token, Infallible>
[INFO] [stdout]    --> src/json/lexer.rs:470:13
[INFO] [stdout]     |
[INFO] [stdout] 470 |             '{'.try_into().unwrap(),
[INFO] [stdout]     |             ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<lexer::Token, Infallible>
[INFO] [stdout]    --> src/json/lexer.rs:472:13
[INFO] [stdout]     |
[INFO] [stdout] 472 |             ':'.try_into().unwrap(),
[INFO] [stdout]     |             ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<lexer::Token, Infallible>
[INFO] [stdout]    --> src/json/lexer.rs:474:13
[INFO] [stdout]     |
[INFO] [stdout] 474 |             '}'.try_into().unwrap(),
[INFO] [stdout]     |             ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<lexer::Token, Infallible>
[INFO] [stdout]    --> src/json/lexer.rs:526:13
[INFO] [stdout]     |
[INFO] [stdout] 526 |             '{'.try_into().unwrap(),
[INFO] [stdout]     |             ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<lexer::Token, Infallible>
[INFO] [stdout]    --> src/json/lexer.rs:528:13
[INFO] [stdout]     |
[INFO] [stdout] 528 |             ':'.try_into().unwrap(),
[INFO] [stdout]     |             ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<lexer::Token, Infallible>
[INFO] [stdout]    --> src/json/lexer.rs:530:13
[INFO] [stdout]     |
[INFO] [stdout] 530 |             '}'.try_into().unwrap(),
[INFO] [stdout]     |             ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<lexer::Token, Infallible>
[INFO] [stdout]    --> src/json/lexer.rs:550:13
[INFO] [stdout]     |
[INFO] [stdout] 550 |             '{'.try_into().unwrap(),
[INFO] [stdout]     |             ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<lexer::Token, Infallible>
[INFO] [stdout]    --> src/json/lexer.rs:552:13
[INFO] [stdout]     |
[INFO] [stdout] 552 |             ':'.try_into().unwrap(),
[INFO] [stdout]     |             ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<lexer::Token, Infallible>
[INFO] [stdout]    --> src/json/lexer.rs:555:13
[INFO] [stdout]     |
[INFO] [stdout] 555 |             ':'.try_into().unwrap(),
[INFO] [stdout]     |             ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<lexer::Token, Infallible>
[INFO] [stdout]    --> src/json/lexer.rs:558:13
[INFO] [stdout]     |
[INFO] [stdout] 558 |             ':'.try_into().unwrap(),
[INFO] [stdout]     |             ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<lexer::Token, Infallible>
[INFO] [stdout]    --> src/json/lexer.rs:561:13
[INFO] [stdout]     |
[INFO] [stdout] 561 |             ':'.try_into().unwrap(),
[INFO] [stdout]     |             ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<lexer::Token, Infallible>
[INFO] [stdout]    --> src/json/lexer.rs:563:13
[INFO] [stdout]     |
[INFO] [stdout] 563 |             '}'.try_into().unwrap(),
[INFO] [stdout]     |             ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `json_parser_rs` (lib test) due to 17 previous errors; 6 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "74ab27f91204e6a8f68dda9a28124c93f4270163aa64fb765939b047ea9c3a54", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "74ab27f91204e6a8f68dda9a28124c93f4270163aa64fb765939b047ea9c3a54", kill_on_drop: false }`
[INFO] [stdout] 74ab27f91204e6a8f68dda9a28124c93f4270163aa64fb765939b047ea9c3a54
