[INFO] updating cached repository https://github.com/aweinstock314/system-f-interpreter
[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] d95223e039d7e69f49a507a22e9b7e3a5de25773
[INFO] checking aweinstock314/system-f-interpreter against master#45d050cde277b22a755847338f2acc2c7b834141 for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faweinstock314%2Fsystem-f-interpreter" "/workspace/builds/worker-13/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-13/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/aweinstock314/system-f-interpreter on toolchain 45d050cde277b22a755847338f2acc2c7b834141
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/aweinstock314/system-f-interpreter
[INFO] finished tweaking git repo https://github.com/aweinstock314/system-f-interpreter
[INFO] tweaked toml for git repo https://github.com/aweinstock314/system-f-interpreter written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate git repo https://github.com/aweinstock314/system-f-interpreter already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "+45d050cde277b22a755847338f2acc2c7b834141" "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] 04c6cb57b30abfa3a6ebf745a750873c4d74acdce812729a8ba0031981b6f700
[INFO] running `"docker" "start" "-a" "04c6cb57b30abfa3a6ebf745a750873c4d74acdce812729a8ba0031981b6f700"`
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]    Compiling ryu v1.0.0
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]     Checking static_assertions v0.3.4
[INFO] [stderr]    Compiling nom v5.0.0
[INFO] [stderr]     Checking unreachable v1.0.0
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling stackvector v1.0.6
[INFO] [stderr]    Compiling lexical-core v0.4.3
[INFO] [stderr]     Checking system-f v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: function is never used: `parenthesized`
[INFO] [stderr]  --> src/parser.rs:9:4
[INFO] [stderr]   |
[INFO] [stderr] 9 | fn parenthesized<X, F: Fn(&[u8]) -> IResult<&[u8], X>>(f: F, input: &[u8]) -> IResult<&[u8], X> { delimited(tag(b"("), f, tag(b")"))(input) }
[INFO] [stderr]   |    ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `end_in_null`
[INFO] [stderr]   --> src/parser.rs:10:4
[INFO] [stderr]    |
[INFO] [stderr] 10 | fn end_in_null<X, F: Fn(&[u8]) -> IResult<&[u8], X>>(f: F, input: &[u8]) -> IResult<&[u8], X> { map(tuple((f, tag(b"\0"))), |x| x.0)(input) }
[INFO] [stderr]    |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `parenthesized`
[INFO] [stderr]  --> src/parser.rs:9:4
[INFO] [stderr]   |
[INFO] [stderr] 9 | fn parenthesized<X, F: Fn(&[u8]) -> IResult<&[u8], X>>(f: F, input: &[u8]) -> IResult<&[u8], X> { delimited(tag(b"("), f, tag(b")"))(input) }
[INFO] [stderr]   |    ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `end_in_null`
[INFO] [stderr]   --> src/parser.rs:10:4
[INFO] [stderr]    |
[INFO] [stderr] 10 | fn end_in_null<X, F: Fn(&[u8]) -> IResult<&[u8], X>>(f: F, input: &[u8]) -> IResult<&[u8], X> { map(tuple((f, tag(b"\0"))), |x| x.0)(input) }
[INFO] [stderr]    |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 15.02s
[INFO] running `"docker" "inspect" "04c6cb57b30abfa3a6ebf745a750873c4d74acdce812729a8ba0031981b6f700"`
[INFO] running `"docker" "rm" "-f" "04c6cb57b30abfa3a6ebf745a750873c4d74acdce812729a8ba0031981b6f700"`
[INFO] [stdout] 04c6cb57b30abfa3a6ebf745a750873c4d74acdce812729a8ba0031981b6f700