[INFO] fetching crate gumdrop 0.8.1...
[INFO] checking gumdrop-0.8.1 against master#642c19bfc3a5c1de985bf5d0cc8207ac9d22708a for pr-148577
[INFO] extracting crate gumdrop 0.8.1 into /workspace/builds/worker-5-tc1/source
[INFO] started tweaking crates.io crate gumdrop 0.8.1
[INFO] finished tweaking crates.io crate gumdrop 0.8.1
[INFO] tweaked toml for crates.io crate gumdrop 0.8.1 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate gumdrop 0.8.1 on toolchain 642c19bfc3a5c1de985bf5d0cc8207ac9d22708a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate gumdrop 0.8.1 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" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded assert_matches v1.3.0
[INFO] [stderr]   Downloaded proc-macro2 v1.0.10
[INFO] [stderr]   Downloaded gumdrop_derive v0.8.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0c1d5ce43597a1d08a8e444e5b36b2f171afcd5ae992c0e0f2435b2fc655b90f
[INFO] running `Command { std: "docker" "start" "-a" "0c1d5ce43597a1d08a8e444e5b36b2f171afcd5ae992c0e0f2435b2fc655b90f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0c1d5ce43597a1d08a8e444e5b36b2f171afcd5ae992c0e0f2435b2fc655b90f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0c1d5ce43597a1d08a8e444e5b36b2f171afcd5ae992c0e0f2435b2fc655b90f", kill_on_drop: false }`
[INFO] [stdout] 0c1d5ce43597a1d08a8e444e5b36b2f171afcd5ae992c0e0f2435b2fc655b90f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c739169b673ae2197f52b92f260333ed73c0d2e20dc787179dc7f0ffe35e6d47
[INFO] running `Command { std: "docker" "start" "-a" "c739169b673ae2197f52b92f260333ed73c0d2e20dc787179dc7f0ffe35e6d47", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.10
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]     Checking assert_matches v1.3.0
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]    Compiling gumdrop_derive v0.8.1
[INFO] [stderr]     Checking gumdrop v0.8.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `Opts` is never constructed
[INFO] [stdout]   --> tests/options.rs:42:12
[INFO] [stdout]    |
[INFO] [stdout] 42 |     struct Opts {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Cmd` is never used
[INFO] [stdout]   --> tests/options.rs:56:10
[INFO] [stdout]    |
[INFO] [stdout] 56 |     enum Cmd {
[INFO] [stdout]    |          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `FooOpts` is never constructed
[INFO] [stdout]   --> tests/options.rs:62:12
[INFO] [stdout]    |
[INFO] [stdout] 62 |     struct FooOpts {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BarOpts` is never constructed
[INFO] [stdout]   --> tests/options.rs:69:12
[INFO] [stdout]    |
[INFO] [stdout] 69 |     struct BarOpts {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.69s
[INFO] running `Command { std: "docker" "inspect" "c739169b673ae2197f52b92f260333ed73c0d2e20dc787179dc7f0ffe35e6d47", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c739169b673ae2197f52b92f260333ed73c0d2e20dc787179dc7f0ffe35e6d47", kill_on_drop: false }`
[INFO] [stdout] c739169b673ae2197f52b92f260333ed73c0d2e20dc787179dc7f0ffe35e6d47