[INFO] fetching crate list-fn 0.20.1...
[INFO] testing list-fn-0.20.1 against try#dec9417b8611e34e787a3e4c37686b5131f9e5c5 for pr-154210-1
[INFO] extracting crate list-fn 0.20.1 into /workspace/builds/worker-1-tc2/source
[INFO] started tweaking crates.io crate list-fn 0.20.1
[INFO] finished tweaking crates.io crate list-fn 0.20.1
[INFO] tweaked toml for crates.io crate list-fn 0.20.1 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate list-fn 0.20.1 on toolchain dec9417b8611e34e787a3e4c37686b5131f9e5c5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 1 package to latest compatible version
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fd256c970eac73538bcb0eb9f5ce74b2d26b886d22310b9875a1630bde5b5ef4
[INFO] running `Command { std: "docker" "start" "-a" "fd256c970eac73538bcb0eb9f5ce74b2d26b886d22310b9875a1630bde5b5ef4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fd256c970eac73538bcb0eb9f5ce74b2d26b886d22310b9875a1630bde5b5ef4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fd256c970eac73538bcb0eb9f5ce74b2d26b886d22310b9875a1630bde5b5ef4", kill_on_drop: false }`
[INFO] [stdout] fd256c970eac73538bcb0eb9f5ce74b2d26b886d22310b9875a1630bde5b5ef4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e3fe094aa14bdd7a3ceb4716e69774546cb1672b892e018caa97ad8090ed391f
[INFO] running `Command { std: "docker" "start" "-a" "e3fe094aa14bdd7a3ceb4716e69774546cb1672b892e018caa97ad8090ed391f", kill_on_drop: false }`
[INFO] [stderr]    Compiling take_mut v0.2.2
[INFO] [stderr]    Compiling list-fn v0.20.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `option::*`
[INFO] [stdout]   --> src/lib.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 | pub use option::*;
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.42s
[INFO] running `Command { std: "docker" "inspect" "e3fe094aa14bdd7a3ceb4716e69774546cb1672b892e018caa97ad8090ed391f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e3fe094aa14bdd7a3ceb4716e69774546cb1672b892e018caa97ad8090ed391f", kill_on_drop: false }`
[INFO] [stdout] e3fe094aa14bdd7a3ceb4716e69774546cb1672b892e018caa97ad8090ed391f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ac573e6e5c677986d56e7b177016559563fdab98cf7c0267c1d62f6bbd568ad4
[INFO] running `Command { std: "docker" "start" "-a" "ac573e6e5c677986d56e7b177016559563fdab98cf7c0267c1d62f6bbd568ad4", kill_on_drop: false }`
[INFO] [stderr]    Compiling list-fn v0.20.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `option::*`
[INFO] [stdout]   --> src/lib.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 | pub use option::*;
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `option::*`
[INFO] [stdout]   --> src/lib.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 | pub use option::*;
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.39s
[INFO] running `Command { std: "docker" "inspect" "ac573e6e5c677986d56e7b177016559563fdab98cf7c0267c1d62f6bbd568ad4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ac573e6e5c677986d56e7b177016559563fdab98cf7c0267c1d62f6bbd568ad4", kill_on_drop: false }`
[INFO] [stdout] ac573e6e5c677986d56e7b177016559563fdab98cf7c0267c1d62f6bbd568ad4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] ba3d6f24ecaf1806bff117621fadcafce1ff64b5896c98d5f2af171f337ce44c
[INFO] running `Command { std: "docker" "start" "-a" "ba3d6f24ecaf1806bff117621fadcafce1ff64b5896c98d5f2af171f337ce44c", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `option::*`
[INFO] [stderr]   --> src/lib.rs:34:9
[INFO] [stderr]    |
[INFO] [stderr] 34 | pub use option::*;
[INFO] [stderr]    |         ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `list-fn` (lib) generated 1 warning (run `cargo fix --lib -p list-fn` to apply 1 suggestion)
[INFO] [stderr] warning: `list-fn` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/list_fn-7562578d6b03344d)
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test tests::as_range ... ok
[INFO] [stdout] test flat_scan::tests::flat_scan_end ... ok
[INFO] [stdout] test tests::as_ref ... ok
[INFO] [stdout] test tests::option ... ok
[INFO] [stdout] test tests::foreach ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests list_fn
[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" "ba3d6f24ecaf1806bff117621fadcafce1ff64b5896c98d5f2af171f337ce44c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ba3d6f24ecaf1806bff117621fadcafce1ff64b5896c98d5f2af171f337ce44c", kill_on_drop: false }`
[INFO] [stdout] ba3d6f24ecaf1806bff117621fadcafce1ff64b5896c98d5f2af171f337ce44c