[INFO] cloning repository https://github.com/djc/wsgrep
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/djc/wsgrep" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdjc%2Fwsgrep", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdjc%2Fwsgrep'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 52f1cc2f8af921dc508e1f40f356d2c98a53581d
[INFO] checking djc/wsgrep against master#368e2fd458a22d0cc133d0c254f2612ee999744f for pr-128351
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdjc%2Fwsgrep" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/djc/wsgrep on toolchain 368e2fd458a22d0cc133d0c254f2612ee999744f
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+368e2fd458a22d0cc133d0c254f2612ee999744f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/djc/wsgrep
[INFO] finished tweaking git repo https://github.com/djc/wsgrep
[INFO] tweaked toml for git repo https://github.com/djc/wsgrep written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/djc/wsgrep 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" "+368e2fd458a22d0cc133d0c254f2612ee999744f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded libc v0.2.59
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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:dff56e7819e73ed36160586b3445e93eb0be776c16704aeeded9c3fb668b2384" "/opt/rustwide/cargo-home/bin/cargo" "+368e2fd458a22d0cc133d0c254f2612ee999744f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b5a88cb2fe036ff09889fb7f0a1c9943967c9eef59f71af0bec0d905c5527993
[INFO] running `Command { std: "docker" "start" "-a" "b5a88cb2fe036ff09889fb7f0a1c9943967c9eef59f71af0bec0d905c5527993", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b5a88cb2fe036ff09889fb7f0a1c9943967c9eef59f71af0bec0d905c5527993", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b5a88cb2fe036ff09889fb7f0a1c9943967c9eef59f71af0bec0d905c5527993", kill_on_drop: false }`
[INFO] [stdout] b5a88cb2fe036ff09889fb7f0a1c9943967c9eef59f71af0bec0d905c5527993
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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:dff56e7819e73ed36160586b3445e93eb0be776c16704aeeded9c3fb668b2384" "/opt/rustwide/cargo-home/bin/cargo" "+368e2fd458a22d0cc133d0c254f2612ee999744f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 686f0ebac02504a45e24f07b6fe9e319aa7bdcb1f2f1b5190536828d45b84f6d
[INFO] running `Command { std: "docker" "start" "-a" "686f0ebac02504a45e24f07b6fe9e319aa7bdcb1f2f1b5190536828d45b84f6d", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling bitflags v1.1.0
[INFO] [stderr]    Compiling syn v0.15.39
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]     Checking unicode-width v0.1.5
[INFO] [stderr]    Compiling unicode-segmentation v1.3.0
[INFO] [stderr]    Compiling libc v0.2.59
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking ucd-util v0.1.3
[INFO] [stderr]    Compiling regex v1.1.9
[INFO] [stderr]     Checking lazy_static v1.3.0
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking regex-syntax v0.6.8
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]     Checking utf8-ranges v1.0.3
[INFO] [stderr]     Checking numtoa v0.1.0
[INFO] [stderr]     Checking aho-corasick v0.7.4
[INFO] [stderr]    Compiling quote v0.6.12
[INFO] [stderr]     Checking termion v1.5.3
[INFO] [stderr]    Compiling structopt-derive v0.2.18
[INFO] [stderr]     Checking structopt v0.2.18
[INFO] [stderr]     Checking wsgrep v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/main.rs:85:8
[INFO] [stdout]    |
[INFO] [stdout] 85 |     Io(io::Error),
[INFO] [stdout]    |     -- ^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 85 |     Io(()),
[INFO] [stdout]    |        ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/main.rs:86:8
[INFO] [stdout]    |
[INFO] [stdout] 86 |     Re(regex::Error),
[INFO] [stdout]    |     -- ^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 86 |     Re(()),
[INFO] [stdout]    |        ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/main.rs:85:8
[INFO] [stdout]    |
[INFO] [stdout] 85 |     Io(io::Error),
[INFO] [stdout]    |     -- ^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 85 |     Io(()),
[INFO] [stdout]    |        ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/main.rs:86:8
[INFO] [stdout]    |
[INFO] [stdout] 86 |     Re(regex::Error),
[INFO] [stdout]    |     -- ^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 86 |     Re(()),
[INFO] [stdout]    |        ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.12s
[INFO] running `Command { std: "docker" "inspect" "686f0ebac02504a45e24f07b6fe9e319aa7bdcb1f2f1b5190536828d45b84f6d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "686f0ebac02504a45e24f07b6fe9e319aa7bdcb1f2f1b5190536828d45b84f6d", kill_on_drop: false }`
[INFO] [stdout] 686f0ebac02504a45e24f07b6fe9e319aa7bdcb1f2f1b5190536828d45b84f6d