[INFO] fetching crate birds 0.2.0...
[INFO] testing birds-0.2.0 against 1.60.0 for beta-1.61-1
[INFO] extracting crate birds 0.2.0 into /workspace/builds/worker-26/source
[INFO] validating manifest of crates.io crate birds 0.2.0 on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "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-26/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-26/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-26/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9f674236846ef63d87649f80452a9c37926a93a978b15de8a614b0f2c8a29376
[INFO] running `Command { std: "docker" "start" "-a" "9f674236846ef63d87649f80452a9c37926a93a978b15de8a614b0f2c8a29376", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9f674236846ef63d87649f80452a9c37926a93a978b15de8a614b0f2c8a29376", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9f674236846ef63d87649f80452a9c37926a93a978b15de8a614b0f2c8a29376", kill_on_drop: false }`
[INFO] [stdout] 9f674236846ef63d87649f80452a9c37926a93a978b15de8a614b0f2c8a29376
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-26/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-26/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7fb1d4584b7666791d02f42746f61c060d34f579e029eb574a9bfbec789208c1
[INFO] running `Command { std: "docker" "start" "-a" "7fb1d4584b7666791d02f42746f61c060d34f579e029eb574a9bfbec789208c1", kill_on_drop: false }`
[INFO] [stderr]    Compiling 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] 145 | | {
[INFO] [stdout] 146 | |     x(sage(x.clone()))
[INFO] [stdout]     | |       --------------- recursive call site
[INFO] [stdout] 147 | | }
[INFO] [stdout]     | |_^ cannot return without recursing
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unconditional_recursion)]` on by default
[INFO] [stdout]     = help: a `loop` may express intention better if this is on purpose
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.71s
[INFO] running `Command { std: "docker" "inspect" "7fb1d4584b7666791d02f42746f61c060d34f579e029eb574a9bfbec789208c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7fb1d4584b7666791d02f42746f61c060d34f579e029eb574a9bfbec789208c1", kill_on_drop: false }`
[INFO] [stdout] 7fb1d4584b7666791d02f42746f61c060d34f579e029eb574a9bfbec789208c1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-26/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-26/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0966bdae62fc80a590e5d8447b62ecd0955798d55eb29f5c2c394d4d54e90c65
[INFO] running `Command { std: "docker" "start" "-a" "0966bdae62fc80a590e5d8447b62ecd0955798d55eb29f5c2c394d4d54e90c65", kill_on_drop: false }`
[INFO] [stderr]    Compiling 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] 145 | | {
[INFO] [stdout] 146 | |     x(sage(x.clone()))
[INFO] [stdout]     | |       --------------- recursive call site
[INFO] [stdout] 147 | | }
[INFO] [stdout]     | |_^ cannot return without recursing
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unconditional_recursion)]` on by default
[INFO] [stdout]     = help: a `loop` may express intention better if this is on purpose
[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] 145 | | {
[INFO] [stdout] 146 | |     x(sage(x.clone()))
[INFO] [stdout]     | |       --------------- recursive call site
[INFO] [stdout] 147 | | }
[INFO] [stdout]     | |_^ cannot return without recursing
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unconditional_recursion)]` on by default
[INFO] [stdout]     = help: a `loop` may express intention better if this is on purpose
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.26s
[INFO] running `Command { std: "docker" "inspect" "0966bdae62fc80a590e5d8447b62ecd0955798d55eb29f5c2c394d4d54e90c65", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0966bdae62fc80a590e5d8447b62ecd0955798d55eb29f5c2c394d4d54e90c65", kill_on_drop: false }`
[INFO] [stdout] 0966bdae62fc80a590e5d8447b62ecd0955798d55eb29f5c2c394d4d54e90c65
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-26/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-26/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 98bc2860aac76c72215c292ba8789aa67dc57e504895ce03ae5c7d9031d380b2
[INFO] running `Command { std: "docker" "start" "-a" "98bc2860aac76c72215c292ba8789aa67dc57e504895ce03ae5c7d9031d380b2", kill_on_drop: false }`
[INFO] [stderr] warning: function cannot return without recursing
[INFO] [stderr]    --> src/lib.rs:142:1
[INFO] [stderr]     |
[INFO] [stderr] 142 | / pub fn sage<A, X>(x: X) -> A
[INFO] [stderr] 143 | | where
[INFO] [stderr] 144 | |     X: Fn(A) -> A + Clone,
[INFO] [stderr] 145 | | {
[INFO] [stderr] 146 | |     x(sage(x.clone()))
[INFO] [stderr]     | |       --------------- recursive call site
[INFO] [stderr] 147 | | }
[INFO] [stderr]     | |_^ cannot return without recursing
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unconditional_recursion)]` on by default
[INFO] [stderr]     = help: a `loop` may express intention better if this is on purpose
[INFO] [stderr] 
[INFO] [stderr] warning: `birds` (lib) generated 1 warning
[INFO] [stderr] warning: `birds` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.00s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/birds-c4af5fec0d362ecf)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests birds
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "98bc2860aac76c72215c292ba8789aa67dc57e504895ce03ae5c7d9031d380b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "98bc2860aac76c72215c292ba8789aa67dc57e504895ce03ae5c7d9031d380b2", kill_on_drop: false }`
[INFO] [stdout] 98bc2860aac76c72215c292ba8789aa67dc57e504895ce03ae5c7d9031d380b2