[INFO] fetching crate birds 0.2.0...
[INFO] testing birds-0.2.0 against beta-2022-02-22 for beta-1.60-1
[INFO] extracting crate birds 0.2.0 into /workspace/builds/worker-21/source
[INFO] validating manifest of crates.io crate birds 0.2.0 on toolchain beta-2022-02-22
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "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-21/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "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-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6e52c384336802a6230d79a01a7f6688928ea71b3e2c1e413bece21bb4114693
[INFO] running `Command { std: "docker" "start" "-a" "6e52c384336802a6230d79a01a7f6688928ea71b3e2c1e413bece21bb4114693", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6e52c384336802a6230d79a01a7f6688928ea71b3e2c1e413bece21bb4114693", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6e52c384336802a6230d79a01a7f6688928ea71b3e2c1e413bece21bb4114693", kill_on_drop: false }`
[INFO] [stdout] 6e52c384336802a6230d79a01a7f6688928ea71b3e2c1e413bece21bb4114693
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 84574ffd1802ba27ef6e0612556faad1e634a99cb5e606e32dd0d3473b53c7eb
[INFO] running `Command { std: "docker" "start" "-a" "84574ffd1802ba27ef6e0612556faad1e634a99cb5e606e32dd0d3473b53c7eb", 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] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.38s
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "84574ffd1802ba27ef6e0612556faad1e634a99cb5e606e32dd0d3473b53c7eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "84574ffd1802ba27ef6e0612556faad1e634a99cb5e606e32dd0d3473b53c7eb", kill_on_drop: false }`
[INFO] [stdout] 84574ffd1802ba27ef6e0612556faad1e634a99cb5e606e32dd0d3473b53c7eb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bb9c09bf624f0a29081d23b33be36c189f3933673dcfa1de379bba29122f0b54
[INFO] running `Command { std: "docker" "start" "-a" "bb9c09bf624f0a29081d23b33be36c189f3933673dcfa1de379bba29122f0b54", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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] [stderr]    Compiling birds v0.2.0 (/opt/rustwide/workdir)
[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 0.61s
[INFO] running `Command { std: "docker" "inspect" "bb9c09bf624f0a29081d23b33be36c189f3933673dcfa1de379bba29122f0b54", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bb9c09bf624f0a29081d23b33be36c189f3933673dcfa1de379bba29122f0b54", kill_on_drop: false }`
[INFO] [stdout] bb9c09bf624f0a29081d23b33be36c189f3933673dcfa1de379bba29122f0b54
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] c4878c5acf9a571578c08f8cfcbf2276dba0223f57e216f97607ebff25e6e29b
[INFO] running `Command { std: "docker" "start" "-a" "c4878c5acf9a571578c08f8cfcbf2276dba0223f57e216f97607ebff25e6e29b", 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 0.04s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/birds-c3a438e79a5a75bd)
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests birds
[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] [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" "c4878c5acf9a571578c08f8cfcbf2276dba0223f57e216f97607ebff25e6e29b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c4878c5acf9a571578c08f8cfcbf2276dba0223f57e216f97607ebff25e6e29b", kill_on_drop: false }`
[INFO] [stdout] c4878c5acf9a571578c08f8cfcbf2276dba0223f57e216f97607ebff25e6e29b