[INFO] cloning repository https://github.com/yacinecheikh/parser-combinators-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/yacinecheikh/parser-combinators-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyacinecheikh%2Fparser-combinators-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyacinecheikh%2Fparser-combinators-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3ab0848073118b040f868a002237ff01331131a5
[INFO] checking yacinecheikh/parser-combinators-rust against try#b047d5f4496a7526d91d0dddea494c05853f2a7b for pr-122661-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyacinecheikh%2Fparser-combinators-rust" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/yacinecheikh/parser-combinators-rust
[INFO] finished tweaking git repo https://github.com/yacinecheikh/parser-combinators-rust
[INFO] tweaked toml for git repo https://github.com/yacinecheikh/parser-combinators-rust written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/yacinecheikh/parser-combinators-rust on toolchain b047d5f4496a7526d91d0dddea494c05853f2a7b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b047d5f4496a7526d91d0dddea494c05853f2a7b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/yacinecheikh/parser-combinators-rust 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" "+b047d5f4496a7526d91d0dddea494c05853f2a7b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+b047d5f4496a7526d91d0dddea494c05853f2a7b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c15dfa2122e1d7b611a87fefde17f6c5c7a45d6c40cf8af85eb240d35259613d
[INFO] running `Command { std: "docker" "start" "-a" "c15dfa2122e1d7b611a87fefde17f6c5c7a45d6c40cf8af85eb240d35259613d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c15dfa2122e1d7b611a87fefde17f6c5c7a45d6c40cf8af85eb240d35259613d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c15dfa2122e1d7b611a87fefde17f6c5c7a45d6c40cf8af85eb240d35259613d", kill_on_drop: false }`
[INFO] [stdout] c15dfa2122e1d7b611a87fefde17f6c5c7a45d6c40cf8af85eb240d35259613d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+b047d5f4496a7526d91d0dddea494c05853f2a7b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f806ae6e44059ad77481feba6ec8e78d1dbb2315c43e1bdeae222eb6f21c7f2e
[INFO] running `Command { std: "docker" "start" "-a" "f806ae6e44059ad77481feba6ec8e78d1dbb2315c43e1bdeae222eb6f21c7f2e", kill_on_drop: false }`
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking parser v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: enum `Result` is never used
[INFO] [stdout]  --> src/lib.rs:7:6
[INFO] [stdout]   |
[INFO] [stdout] 7 | enum Result<T> {
[INFO] [stdout]   |      ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `parse` is never used
[INFO] [stdout]   --> src/lib.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | trait Parse<T> {
[INFO] [stdout]    |       ----- method in this trait
[INFO] [stdout] 18 |     fn create(&self) -> Parser<T>; // create a Box<dyn Parse> trait object
[INFO] [stdout] 19 |     fn parse(&self, position: usize, source: &[u8]) -> Result<T>;
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `CharParser` is never constructed
[INFO] [stdout]   --> src/lib.rs:47:8
[INFO] [stdout]    |
[INFO] [stdout] 47 | struct CharParser {}
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `readchar` is never used
[INFO] [stdout]   --> src/lib.rs:64:4
[INFO] [stdout]    |
[INFO] [stdout] 64 | fn readchar() -> Parser<u8> {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `AndParser` is never constructed
[INFO] [stdout]   --> src/lib.rs:71:8
[INFO] [stdout]    |
[INFO] [stdout] 71 | struct AndParser<T> {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `concat` is never used
[INFO] [stdout]    --> src/lib.rs:100:4
[INFO] [stdout]     |
[INFO] [stdout] 100 | fn concat<T: 'static>(parsers: Vec<Parser<T>>) -> Parser<Vec<T>> {
[INFO] [stdout]     |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `OrParser` is never constructed
[INFO] [stdout]    --> src/lib.rs:105:8
[INFO] [stdout]     |
[INFO] [stdout] 105 | struct OrParser<T> {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `oneof` is never used
[INFO] [stdout]    --> src/lib.rs:125:4
[INFO] [stdout]     |
[INFO] [stdout] 125 | fn oneof<T: 'static>(parsers: Vec<Parser<T>>) -> Parser<T> {
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `FilterParser` is never constructed
[INFO] [stdout]    --> src/lib.rs:130:8
[INFO] [stdout]     |
[INFO] [stdout] 130 | struct FilterParser<T> {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `require` is never used
[INFO] [stdout]    --> src/lib.rs:156:4
[INFO] [stdout]     |
[INFO] [stdout] 156 | fn require<T: 'static>(f: fn(&T) -> bool, p: Parser<T>) -> Parser<T> {
[INFO] [stdout]     |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MapParser` is never constructed
[INFO] [stdout]    --> src/lib.rs:162:8
[INFO] [stdout]     |
[INFO] [stdout] 162 | struct MapParser<T, U> {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `process` is never used
[INFO] [stdout]    --> src/lib.rs:185:4
[INFO] [stdout]     |
[INFO] [stdout] 185 | fn process<T: 'static, U: 'static>(f: fn(T) -> U, parser: Parser<T>) -> Parser<U> {
[INFO] [stdout]     |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `StarParser` is never constructed
[INFO] [stdout]    --> src/lib.rs:190:8
[INFO] [stdout]     |
[INFO] [stdout] 190 | struct StarParser<T> {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `star` is never used
[INFO] [stdout]    --> src/lib.rs:218:4
[INFO] [stdout]     |
[INFO] [stdout] 218 | fn star<T: 'static>(parser: Parser<T>) -> Parser<Vec<T>> {
[INFO] [stdout]     |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.16s
[INFO] running `Command { std: "docker" "inspect" "f806ae6e44059ad77481feba6ec8e78d1dbb2315c43e1bdeae222eb6f21c7f2e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f806ae6e44059ad77481feba6ec8e78d1dbb2315c43e1bdeae222eb6f21c7f2e", kill_on_drop: false }`
[INFO] [stdout] f806ae6e44059ad77481feba6ec8e78d1dbb2315c43e1bdeae222eb6f21c7f2e