[INFO] updating cached repository https://github.com/cfsamson/examples-parsers
[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] e47801140f65a0b613c09dd8b2a6cd55ed3e51c8
[INFO] checking cfsamson/examples-parsers against try#e4dba30b9b475d8750370c4dfb49b6541990904d for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcfsamson%2Fexamples-parsers" "/workspace/builds/worker-4/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/cfsamson/examples-parsers on toolchain e4dba30b9b475d8750370c4dfb49b6541990904d
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/cfsamson/examples-parsers
[INFO] finished tweaking git repo https://github.com/cfsamson/examples-parsers
[INFO] tweaked toml for git repo https://github.com/cfsamson/examples-parsers written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/cfsamson/examples-parsers already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 69303cd5ac9ced645ea7eff4c0893b6580d3d48d1801b63994b4112dc6b250bb
[INFO] running `"docker" "start" "-a" "69303cd5ac9ced645ea7eff4c0893b6580d3d48d1801b63994b4112dc6b250bb"`
[INFO] [stderr]     Checking parser v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `test`
[INFO] [stderr]  --> src/recursive_ascent.rs:2:9
[INFO] [stderr]   |
[INFO] [stderr] 2 |     let test = "[1, [], 3]";
[INFO] [stderr]   |         ^^^^ help: if this is intentional, prefix it with an underscore: `_test`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test`
[INFO] [stderr]  --> src/recursive_ascent.rs:1:4
[INFO] [stderr]   |
[INFO] [stderr] 1 | fn test() {
[INFO] [stderr]   |    ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Lex`
[INFO] [stderr]  --> src/recursive_ascent.rs:6:8
[INFO] [stderr]   |
[INFO] [stderr] 6 | struct Lex {
[INFO] [stderr]   |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `token`
[INFO] [stderr]   --> src/recursive_ascent.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     fn token(&self) -> Token {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `Token`
[INFO] [stderr]   --> src/recursive_ascent.rs:16:6
[INFO] [stderr]    |
[INFO] [stderr] 16 | enum Token {
[INFO] [stderr]    |      ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Value`
[INFO] [stderr]   --> src/recursive_ascent.rs:24:8
[INFO] [stderr]    |
[INFO] [stderr] 24 | struct Value(JsonValue);
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Array`
[INFO] [stderr]   --> src/recursive_ascent.rs:25:8
[INFO] [stderr]    |
[INFO] [stderr] 25 | struct Array(Vec<JsonValue>);
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Elements`
[INFO] [stderr]   --> src/recursive_ascent.rs:26:8
[INFO] [stderr]    |
[INFO] [stderr] 26 | struct Elements(Vec<JsonValue>);
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `JsonValue`
[INFO] [stderr]   --> src/recursive_ascent.rs:28:6
[INFO] [stderr]    |
[INFO] [stderr] 28 | enum JsonValue {
[INFO] [stderr]    |      ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `ParseError`
[INFO] [stderr]   --> src/recursive_ascent.rs:33:8
[INFO] [stderr]    |
[INFO] [stderr] 33 | struct ParseError;
[INFO] [stderr]    |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 10 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `test`
[INFO] [stderr]  --> src/recursive_ascent.rs:2:9
[INFO] [stderr]   |
[INFO] [stderr] 2 |     let test = "[1, [], 3]";
[INFO] [stderr]   |         ^^^^ help: if this is intentional, prefix it with an underscore: `_test`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test`
[INFO] [stderr]  --> src/recursive_ascent.rs:1:4
[INFO] [stderr]   |
[INFO] [stderr] 1 | fn test() {
[INFO] [stderr]   |    ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Lex`
[INFO] [stderr]  --> src/recursive_ascent.rs:6:8
[INFO] [stderr]   |
[INFO] [stderr] 6 | struct Lex {
[INFO] [stderr]   |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `token`
[INFO] [stderr]   --> src/recursive_ascent.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     fn token(&self) -> Token {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `Token`
[INFO] [stderr]   --> src/recursive_ascent.rs:16:6
[INFO] [stderr]    |
[INFO] [stderr] 16 | enum Token {
[INFO] [stderr]    |      ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Value`
[INFO] [stderr]   --> src/recursive_ascent.rs:24:8
[INFO] [stderr]    |
[INFO] [stderr] 24 | struct Value(JsonValue);
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Array`
[INFO] [stderr]   --> src/recursive_ascent.rs:25:8
[INFO] [stderr]    |
[INFO] [stderr] 25 | struct Array(Vec<JsonValue>);
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Elements`
[INFO] [stderr]   --> src/recursive_ascent.rs:26:8
[INFO] [stderr]    |
[INFO] [stderr] 26 | struct Elements(Vec<JsonValue>);
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `JsonValue`
[INFO] [stderr]   --> src/recursive_ascent.rs:28:6
[INFO] [stderr]    |
[INFO] [stderr] 28 | enum JsonValue {
[INFO] [stderr]    |      ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `ParseError`
[INFO] [stderr]   --> src/recursive_ascent.rs:33:8
[INFO] [stderr]    |
[INFO] [stderr] 33 | struct ParseError;
[INFO] [stderr]    |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 10 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.62s
[INFO] running `"docker" "inspect" "69303cd5ac9ced645ea7eff4c0893b6580d3d48d1801b63994b4112dc6b250bb"`
[INFO] running `"docker" "rm" "-f" "69303cd5ac9ced645ea7eff4c0893b6580d3d48d1801b63994b4112dc6b250bb"`
[INFO] [stdout] 69303cd5ac9ced645ea7eff4c0893b6580d3d48d1801b63994b4112dc6b250bb