[INFO] cloning repository https://github.com/edwardwohaijun/unwrap
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/edwardwohaijun/unwrap" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fedwardwohaijun%2Funwrap", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fedwardwohaijun%2Funwrap'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ea51b3fb4617fefb875e90081c9e1577228a8e1a
[INFO] checking edwardwohaijun/unwrap against master#36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923 for pr-81863
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fedwardwohaijun%2Funwrap" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/edwardwohaijun/unwrap on toolchain 36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/edwardwohaijun/unwrap
[INFO] finished tweaking git repo https://github.com/edwardwohaijun/unwrap
[INFO] tweaked toml for git repo https://github.com/edwardwohaijun/unwrap written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/edwardwohaijun/unwrap already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "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" "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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ca6b92b1a7d9201c1407cb127131d5c1e42652878defbc154100c8944d5dfe82
[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" "ca6b92b1a7d9201c1407cb127131d5c1e42652878defbc154100c8944d5dfe82", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ca6b92b1a7d9201c1407cb127131d5c1e42652878defbc154100c8944d5dfe82", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ca6b92b1a7d9201c1407cb127131d5c1e42652878defbc154100c8944d5dfe82", kill_on_drop: false }`
[INFO] [stdout] ca6b92b1a7d9201c1407cb127131d5c1e42652878defbc154100c8944d5dfe82
[INFO] running `Command { std: "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" "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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] c283ba898ce5f744f23fabc1c2faea51d387d54c2f667f5ef287e4768a93182f
[INFO] running `Command { std: "docker" "start" "-a" "c283ba898ce5f744f23fabc1c2faea51d387d54c2f667f5ef287e4768a93182f", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling num-traits v0.2.6
[INFO] [stderr]     Checking cfg-if v0.1.6
[INFO] [stderr]     Checking rand_core v0.4.0
[INFO] [stderr]    Compiling autocfg v0.1.2
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling crc32fast v1.1.2
[INFO] [stderr]    Compiling byteorder v1.3.1
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]    Compiling memchr v2.2.0
[INFO] [stderr]    Compiling pkg-config v0.3.14
[INFO] [stderr]     Checking stable_deref_trait v1.1.1
[INFO] [stderr]     Checking lazy_static v1.2.0
[INFO] [stderr]     Checking ucd-util v0.1.3
[INFO] [stderr]    Compiling regex v1.1.0
[INFO] [stderr]     Checking libc v0.1.12
[INFO] [stderr]     Checking utf8-ranges v1.0.2
[INFO] [stderr]     Checking lazy_static v0.2.11
[INFO] [stderr]     Checking lazy_static v0.1.16
[INFO] [stderr]     Checking nom v2.2.1
[INFO] [stderr]    Compiling bzip2-sys v0.1.7
[INFO] [stderr]    Compiling miniz-sys v0.1.11
[INFO] [stderr]    Compiling unrar_sys v0.2.0
[INFO] [stderr]     Checking log v0.4.6
[INFO] [stderr]     Checking regex-syntax v0.6.5
[INFO] [stderr]     Checking unreachable v1.0.0
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[INFO] [stderr]     Checking rand_os v0.1.2
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]     Checking smallvec v0.6.8
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]     Checking rand_xorshift v0.1.1
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[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand v0.6.5
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[INFO] [stderr]     Checking aho-corasick v0.5.3
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[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling rust-lzma v0.4.0
[INFO] [stderr]     Checking regex v0.1.80
[INFO] [stderr]     Checking flate2 v1.0.6
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[INFO] [stderr]     Checking base64 v0.10.1
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[INFO] [stderr]     Checking parking_lot_core v0.2.14
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[INFO] [stderr]     Checking parking_lot v0.4.8
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[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]     Checking num-complex v0.1.43
[INFO] [stderr]     Checking enum_primitive v0.1.1
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[INFO] [stderr]     Checking zip v0.5.0
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[INFO] [stderr]     Checking num-iter v0.1.37
[INFO] [stderr]     Checking num-rational v0.1.42
[INFO] [stderr]     Checking num v0.1.42
[INFO] [stderr]     Checking unrar v0.4.3
[INFO] [stderr]     Checking unwrap v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `create_dir`
[INFO] [stdout]    --> src/main.rs:251:4
[INFO] [stdout]     |
[INFO] [stdout] 251 | fn create_dir(path: &str) -> io::Result<String> { // after moving this fn into a module, make this one private
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static variable `path_digi_suffix` should have an upper case name
[INFO] [stdout]   --> src/main.rs:35:16
[INFO] [stdout]    |
[INFO] [stdout] 35 |     static ref path_digi_suffix: Regex = Regex::new(r"_\((\d+)\)$").unwrap(); // to match a directory name: this_is_a_directory_(123)
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^ help: convert the identifier to upper case: `PATH_DIGI_SUFFIX`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `create_dir`
[INFO] [stdout]    --> src/main.rs:251:4
[INFO] [stdout]     |
[INFO] [stdout] 251 | fn create_dir(path: &str) -> io::Result<String> { // after moving this fn into a module, make this one private
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static variable `path_digi_suffix` should have an upper case name
[INFO] [stdout]   --> src/main.rs:35:16
[INFO] [stdout]    |
[INFO] [stdout] 35 |     static ref path_digi_suffix: Regex = Regex::new(r"_\((\d+)\)$").unwrap(); // to match a directory name: this_is_a_directory_(123)
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^ help: convert the identifier to upper case: `PATH_DIGI_SUFFIX`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 07s
[INFO] running `Command { std: "docker" "inspect" "c283ba898ce5f744f23fabc1c2faea51d387d54c2f667f5ef287e4768a93182f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c283ba898ce5f744f23fabc1c2faea51d387d54c2f667f5ef287e4768a93182f", kill_on_drop: false }`
[INFO] [stdout] c283ba898ce5f744f23fabc1c2faea51d387d54c2f667f5ef287e4768a93182f