[INFO] cloning repository https://github.com/yichaolemon/RegexParser
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/yichaolemon/RegexParser" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyichaolemon%2FRegexParser", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyichaolemon%2FRegexParser'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9a6bde9e2d3abfc4f79597353a1037b6e9c99c4a
[INFO] checking yichaolemon/RegexParser against try#ddfd70ee3c3748e597b32f416b0d15a4f6e37685 for pr-87050
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyichaolemon%2FRegexParser" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/yichaolemon/RegexParser on toolchain ddfd70ee3c3748e597b32f416b0d15a4f6e37685
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/yichaolemon/RegexParser
[INFO] finished tweaking git repo https://github.com/yichaolemon/RegexParser
[INFO] tweaked toml for git repo https://github.com/yichaolemon/RegexParser written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/yichaolemon/RegexParser already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9cc1b1129ac21a000a71e29c0252e26e3ebd90e72753d08e30c995fe2b4c3dec
[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" "9cc1b1129ac21a000a71e29c0252e26e3ebd90e72753d08e30c995fe2b4c3dec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9cc1b1129ac21a000a71e29c0252e26e3ebd90e72753d08e30c995fe2b4c3dec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9cc1b1129ac21a000a71e29c0252e26e3ebd90e72753d08e30c995fe2b4c3dec", kill_on_drop: false }`
[INFO] [stdout] 9cc1b1129ac21a000a71e29c0252e26e3ebd90e72753d08e30c995fe2b4c3dec
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1963b52ae114216be258612a20554f61f017d525c79d18b99be9caaf4e458d6d
[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" "1963b52ae114216be258612a20554f61f017d525c79d18b99be9caaf4e458d6d", kill_on_drop: false }`
[INFO] [stderr]     Checking hex v0.4.2
[INFO] [stderr]     Checking regex_parser v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `example`
[INFO] [stdout]    --> src/graph.rs:124:10
[INFO] [stdout]     |
[INFO] [stdout] 124 |   pub fn example(&self) -> Option<String> {
[INFO] [stdout]     |          ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `example`
[INFO] [stdout]    --> src/graph.rs:124:10
[INFO] [stdout]     |
[INFO] [stdout] 124 |   pub fn example(&self) -> Option<String> {
[INFO] [stdout]     |          ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.27s
[INFO] running `Command { std: "docker" "inspect" "1963b52ae114216be258612a20554f61f017d525c79d18b99be9caaf4e458d6d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1963b52ae114216be258612a20554f61f017d525c79d18b99be9caaf4e458d6d", kill_on_drop: false }`
[INFO] [stdout] 1963b52ae114216be258612a20554f61f017d525c79d18b99be9caaf4e458d6d