[INFO] fetching crate birds 0.2.0...
[INFO] checking birds-0.2.0 against master#0f6e1ae67854c3c44726e8376144c16b465fe7c6 for pr-129392
[INFO] extracting crate birds 0.2.0 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate birds 0.2.0 on toolchain 0f6e1ae67854c3c44726e8376144c16b465fe7c6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0f6e1ae67854c3c44726e8376144c16b465fe7c6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate birds 0.2.0
[INFO] finished tweaking crates.io crate birds 0.2.0
[INFO] tweaked toml for crates.io crate birds 0.2.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0f6e1ae67854c3c44726e8376144c16b465fe7c6" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0f6e1ae67854c3c44726e8376144c16b465fe7c6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "+0f6e1ae67854c3c44726e8376144c16b465fe7c6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] be977c53ace13c479b2806684beba3e57336961804049d56090224d4654a254e
[INFO] running `Command { std: "docker" "start" "-a" "be977c53ace13c479b2806684beba3e57336961804049d56090224d4654a254e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "be977c53ace13c479b2806684beba3e57336961804049d56090224d4654a254e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "be977c53ace13c479b2806684beba3e57336961804049d56090224d4654a254e", kill_on_drop: false }`
[INFO] [stdout] be977c53ace13c479b2806684beba3e57336961804049d56090224d4654a254e
[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" "+0f6e1ae67854c3c44726e8376144c16b465fe7c6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3ee9a9ca9c85dcf3de2f1a0c392b09089b7500abd7278bff63573c1eafa8c150
[INFO] running `Command { std: "docker" "start" "-a" "3ee9a9ca9c85dcf3de2f1a0c392b09089b7500abd7278bff63573c1eafa8c150", kill_on_drop: false }`
[INFO] [stderr]     Checking birds v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function cannot return without recursing
[INFO] [stdout]    --> src/lib.rs:142:1
[INFO] [stdout]     |
[INFO] [stdout] 142 | / pub fn sage<A, X>(x: X) -> A
[INFO] [stdout] 143 | | where
[INFO] [stdout] 144 | |     X: Fn(A) -> A + Clone,
[INFO] [stdout]     | |__________________________^ cannot return without recursing
[INFO] [stdout] 145 |   {
[INFO] [stdout] 146 |       x(sage(x.clone()))
[INFO] [stdout]     |         --------------- recursive call site
[INFO] [stdout]     |
[INFO] [stdout]     = help: a `loop` may express intention better if this is on purpose
[INFO] [stdout]     = note: `#[warn(unconditional_recursion)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function cannot return without recursing
[INFO] [stdout]    --> src/lib.rs:142:1
[INFO] [stdout]     |
[INFO] [stdout] 142 | / pub fn sage<A, X>(x: X) -> A
[INFO] [stdout] 143 | | where
[INFO] [stdout] 144 | |     X: Fn(A) -> A + Clone,
[INFO] [stdout]     | |__________________________^ cannot return without recursing
[INFO] [stdout] 145 |   {
[INFO] [stdout] 146 |       x(sage(x.clone()))
[INFO] [stdout]     |         --------------- recursive call site
[INFO] [stdout]     |
[INFO] [stdout]     = help: a `loop` may express intention better if this is on purpose
[INFO] [stdout]     = note: `#[warn(unconditional_recursion)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.07s
[INFO] running `Command { std: "docker" "inspect" "3ee9a9ca9c85dcf3de2f1a0c392b09089b7500abd7278bff63573c1eafa8c150", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3ee9a9ca9c85dcf3de2f1a0c392b09089b7500abd7278bff63573c1eafa8c150", kill_on_drop: false }`
[INFO] [stdout] 3ee9a9ca9c85dcf3de2f1a0c392b09089b7500abd7278bff63573c1eafa8c150