[INFO] fetching crate birds 0.2.0...
[INFO] checking birds-0.2.0 against try#24cd45d7714ba43afd4b8e62fb677b069b21c4a5 for pr-129543
[INFO] extracting crate birds 0.2.0 into /workspace/builds/worker-0-tc2/source
[INFO] validating manifest of crates.io crate birds 0.2.0 on toolchain 24cd45d7714ba43afd4b8e62fb677b069b21c4a5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+24cd45d7714ba43afd4b8e62fb677b069b21c4a5" "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-0-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+24cd45d7714ba43afd4b8e62fb677b069b21c4a5" "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" "+24cd45d7714ba43afd4b8e62fb677b069b21c4a5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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" "+24cd45d7714ba43afd4b8e62fb677b069b21c4a5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d4bd2e5371bdde7b28bfca86bb41a2e02051bc6ddbc28257750d1bf7a84b62f2
[INFO] running `Command { std: "docker" "start" "-a" "d4bd2e5371bdde7b28bfca86bb41a2e02051bc6ddbc28257750d1bf7a84b62f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d4bd2e5371bdde7b28bfca86bb41a2e02051bc6ddbc28257750d1bf7a84b62f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d4bd2e5371bdde7b28bfca86bb41a2e02051bc6ddbc28257750d1bf7a84b62f2", kill_on_drop: false }`
[INFO] [stdout] d4bd2e5371bdde7b28bfca86bb41a2e02051bc6ddbc28257750d1bf7a84b62f2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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" "+24cd45d7714ba43afd4b8e62fb677b069b21c4a5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e62ad65de232728c493056ce038485bc715b6112f4db4d20df92c6a0cb41e609
[INFO] running `Command { std: "docker" "start" "-a" "e62ad65de232728c493056ce038485bc715b6112f4db4d20df92c6a0cb41e609", 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: 1 warning emitted
[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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.19s
[INFO] running `Command { std: "docker" "inspect" "e62ad65de232728c493056ce038485bc715b6112f4db4d20df92c6a0cb41e609", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e62ad65de232728c493056ce038485bc715b6112f4db4d20df92c6a0cb41e609", kill_on_drop: false }`
[INFO] [stdout] e62ad65de232728c493056ce038485bc715b6112f4db4d20df92c6a0cb41e609