[INFO] cloning repository https://github.com/cfsamson/examples-parsers
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/cfsamson/examples-parsers" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcfsamson%2Fexamples-parsers", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcfsamson%2Fexamples-parsers'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e47801140f65a0b613c09dd8b2a6cd55ed3e51c8
[INFO] testing cfsamson/examples-parsers against try#722e1797249a965b6335aebd65d777f917e498f1 for pr-91031
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcfsamson%2Fexamples-parsers" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/cfsamson/examples-parsers on toolchain 722e1797249a965b6335aebd65d777f917e498f1
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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-6/source/Cargo.toml
[INFO] crate git repo https://github.com/cfsamson/examples-parsers already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ffc0e346d86633acebc0c03180d35bd729d54c724b6b5dcad5f615e1730ce39b
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "ffc0e346d86633acebc0c03180d35bd729d54c724b6b5dcad5f615e1730ce39b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ffc0e346d86633acebc0c03180d35bd729d54c724b6b5dcad5f615e1730ce39b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ffc0e346d86633acebc0c03180d35bd729d54c724b6b5dcad5f615e1730ce39b", kill_on_drop: false }`
[INFO] [stdout] ffc0e346d86633acebc0c03180d35bd729d54c724b6b5dcad5f615e1730ce39b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 33e4ba043ff7566a7aa4ffa29c55eb662c52500922ebbf04f1863b64c28856b6
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "33e4ba043ff7566a7aa4ffa29c55eb662c52500922ebbf04f1863b64c28856b6", kill_on_drop: false }`
[INFO] [stderr]    Compiling parser v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `test`
[INFO] [stdout]  --> src/recursive_ascent.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 |     let test = "[1, [], 3]";
[INFO] [stdout]   |         ^^^^ help: if this is intentional, prefix it with an underscore: `_test`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test`
[INFO] [stdout]  --> src/recursive_ascent.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn test() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Lex`
[INFO] [stdout]  --> src/recursive_ascent.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct Lex {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `token`
[INFO] [stdout]   --> src/recursive_ascent.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 |     fn token(&self) -> Token {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Token`
[INFO] [stdout]   --> src/recursive_ascent.rs:16:6
[INFO] [stdout]    |
[INFO] [stdout] 16 | enum Token {
[INFO] [stdout]    |      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Value`
[INFO] [stdout]   --> src/recursive_ascent.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 | struct Value(JsonValue);
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Array`
[INFO] [stdout]   --> src/recursive_ascent.rs:25:8
[INFO] [stdout]    |
[INFO] [stdout] 25 | struct Array(Vec<JsonValue>);
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Elements`
[INFO] [stdout]   --> src/recursive_ascent.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | struct Elements(Vec<JsonValue>);
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `JsonValue`
[INFO] [stdout]   --> src/recursive_ascent.rs:28:6
[INFO] [stdout]    |
[INFO] [stdout] 28 | enum JsonValue {
[INFO] [stdout]    |      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `ParseError`
[INFO] [stdout]   --> src/recursive_ascent.rs:33:8
[INFO] [stdout]    |
[INFO] [stdout] 33 | struct ParseError;
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.72s
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "33e4ba043ff7566a7aa4ffa29c55eb662c52500922ebbf04f1863b64c28856b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "33e4ba043ff7566a7aa4ffa29c55eb662c52500922ebbf04f1863b64c28856b6", kill_on_drop: false }`
[INFO] [stdout] 33e4ba043ff7566a7aa4ffa29c55eb662c52500922ebbf04f1863b64c28856b6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b63c11adcc516cd328123e109b98f0a12ef5dfa53684a821d69bb820abe42193
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "b63c11adcc516cd328123e109b98f0a12ef5dfa53684a821d69bb820abe42193", kill_on_drop: false }`
[INFO] [stderr]    Compiling parser v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `test`
[INFO] [stdout]  --> src/recursive_ascent.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 |     let test = "[1, [], 3]";
[INFO] [stdout]   |         ^^^^ help: if this is intentional, prefix it with an underscore: `_test`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test`
[INFO] [stdout]  --> src/recursive_ascent.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn test() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Lex`
[INFO] [stdout]  --> src/recursive_ascent.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct Lex {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `token`
[INFO] [stdout]   --> src/recursive_ascent.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 |     fn token(&self) -> Token {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Token`
[INFO] [stdout]   --> src/recursive_ascent.rs:16:6
[INFO] [stdout]    |
[INFO] [stdout] 16 | enum Token {
[INFO] [stdout]    |      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Value`
[INFO] [stdout]   --> src/recursive_ascent.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 | struct Value(JsonValue);
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Array`
[INFO] [stdout]   --> src/recursive_ascent.rs:25:8
[INFO] [stdout]    |
[INFO] [stdout] 25 | struct Array(Vec<JsonValue>);
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Elements`
[INFO] [stdout]   --> src/recursive_ascent.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | struct Elements(Vec<JsonValue>);
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `JsonValue`
[INFO] [stdout]   --> src/recursive_ascent.rs:28:6
[INFO] [stdout]    |
[INFO] [stdout] 28 | enum JsonValue {
[INFO] [stdout]    |      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `ParseError`
[INFO] [stdout]   --> src/recursive_ascent.rs:33:8
[INFO] [stdout]    |
[INFO] [stdout] 33 | struct ParseError;
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.65s
[INFO] running `Command { std: "docker" "inspect" "b63c11adcc516cd328123e109b98f0a12ef5dfa53684a821d69bb820abe42193", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b63c11adcc516cd328123e109b98f0a12ef5dfa53684a821d69bb820abe42193", kill_on_drop: false }`
[INFO] [stdout] b63c11adcc516cd328123e109b98f0a12ef5dfa53684a821d69bb820abe42193
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 5802e2cd020863b30965cbd4ed633e0e2693006f63eaaeafeb0f0a10482d3e3d
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "5802e2cd020863b30965cbd4ed633e0e2693006f63eaaeafeb0f0a10482d3e3d", kill_on_drop: false }`
[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: associated function is never used: `token`
[INFO] [stderr]   --> src/recursive_ascent.rs:11:8
[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: `parser` (bin "parser" test) generated 10 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/parser-2e5bf270cdb510be)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "5802e2cd020863b30965cbd4ed633e0e2693006f63eaaeafeb0f0a10482d3e3d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5802e2cd020863b30965cbd4ed633e0e2693006f63eaaeafeb0f0a10482d3e3d", kill_on_drop: false }`
[INFO] [stdout] 5802e2cd020863b30965cbd4ed633e0e2693006f63eaaeafeb0f0a10482d3e3d