[INFO] cloning repository https://github.com/bitfield/comprust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/bitfield/comprust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbitfield%2Fcomprust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbitfield%2Fcomprust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d4c77558510123dc96cc39c111010804fc72839c
[INFO] checking bitfield/comprust/d4c77558510123dc96cc39c111010804fc72839c against master#ab869e094a907cc5d19b4080f22eccaf347f1f95 for pr-129604
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbitfield%2Fcomprust" "/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/bitfield/comprust on toolchain ab869e094a907cc5d19b4080f22eccaf347f1f95
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/bitfield/comprust
[INFO] finished tweaking git repo https://github.com/bitfield/comprust
[INFO] tweaked toml for git repo https://github.com/bitfield/comprust written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/bitfield/comprust 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" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded debug_print v1.0.0
[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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b41c8e98c1182823c2aa00514a5459cad371cb84df0ff4240903311d8569fcbf
[INFO] running `Command { std: "docker" "start" "-a" "b41c8e98c1182823c2aa00514a5459cad371cb84df0ff4240903311d8569fcbf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b41c8e98c1182823c2aa00514a5459cad371cb84df0ff4240903311d8569fcbf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b41c8e98c1182823c2aa00514a5459cad371cb84df0ff4240903311d8569fcbf", kill_on_drop: false }`
[INFO] [stdout] b41c8e98c1182823c2aa00514a5459cad371cb84df0ff4240903311d8569fcbf
[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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 195df43d5ac60f268e34618a16bccf1e3176c14a2278ec7937a99e63b0ea44d1
[INFO] running `Command { std: "docker" "start" "-a" "195df43d5ac60f268e34618a16bccf1e3176c14a2278ec7937a99e63b0ea44d1", kill_on_drop: false }`
[INFO] [stderr]     Checking debug_print v1.0.0
[INFO] [stderr]     Checking comprust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variants `Java` and `Perl` are never constructed
[INFO] [stdout]  --> tests/builder.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | enum Language {
[INFO] [stdout]   |      -------- variants in this enum
[INFO] [stdout] 3 |     Rust,
[INFO] [stdout] 4 |     Java,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 5 |     Perl,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Language` 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] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name` and `version_expression` are never read
[INFO] [stdout]   --> tests/builder.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 9  | struct Dependency {
[INFO] [stdout]    |        ---------- fields in this struct
[INFO] [stdout] 10 |     name: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 11 |     version_expression: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Dependency` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.51s
[INFO] running `Command { std: "docker" "inspect" "195df43d5ac60f268e34618a16bccf1e3176c14a2278ec7937a99e63b0ea44d1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "195df43d5ac60f268e34618a16bccf1e3176c14a2278ec7937a99e63b0ea44d1", kill_on_drop: false }`
[INFO] [stdout] 195df43d5ac60f268e34618a16bccf1e3176c14a2278ec7937a99e63b0ea44d1