[INFO] fetching crate list-fn 0.19.1...
[INFO] testing list-fn-0.19.1 against 1.55.0 for beta-1.56-1
[INFO] extracting crate list-fn 0.19.1 into /workspace/builds/worker-100/source
[INFO] validating manifest of crates.io crate list-fn 0.19.1 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate list-fn 0.19.1
[INFO] finished tweaking crates.io crate list-fn 0.19.1
[INFO] tweaked toml for crates.io crate list-fn 0.19.1 written to /workspace/builds/worker-100/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "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-100/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-100/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c687c65cfc8c19c35b5fa59cc96c75ea6e192e9414fcf67977d4f940a4531cf5
[INFO] running `Command { std: "docker" "start" "-a" "c687c65cfc8c19c35b5fa59cc96c75ea6e192e9414fcf67977d4f940a4531cf5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c687c65cfc8c19c35b5fa59cc96c75ea6e192e9414fcf67977d4f940a4531cf5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c687c65cfc8c19c35b5fa59cc96c75ea6e192e9414fcf67977d4f940a4531cf5", kill_on_drop: false }`
[INFO] [stdout] c687c65cfc8c19c35b5fa59cc96c75ea6e192e9414fcf67977d4f940a4531cf5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-100/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-100/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 40891a38fb0b4f712ca970a51f7addca3854e4bc0b43b8845ae8e15867ea7f38
[INFO] running `Command { std: "docker" "start" "-a" "40891a38fb0b4f712ca970a51f7addca3854e4bc0b43b8845ae8e15867ea7f38", kill_on_drop: false }`
[INFO] [stderr]    Compiling take_mut v0.2.2
[INFO] [stderr]    Compiling list-fn v0.19.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]  --> src/collection.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use super::*;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.66s
[INFO] running `Command { std: "docker" "inspect" "40891a38fb0b4f712ca970a51f7addca3854e4bc0b43b8845ae8e15867ea7f38", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "40891a38fb0b4f712ca970a51f7addca3854e4bc0b43b8845ae8e15867ea7f38", kill_on_drop: false }`
[INFO] [stdout] 40891a38fb0b4f712ca970a51f7addca3854e4bc0b43b8845ae8e15867ea7f38
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-100/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-100/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6c9125b2e9ba3a5d6e5e1f5d1b29fa4eb8e6dcdaf13e4b69959ffe6fdaf55b07
[INFO] running `Command { std: "docker" "start" "-a" "6c9125b2e9ba3a5d6e5e1f5d1b29fa4eb8e6dcdaf13e4b69959ffe6fdaf55b07", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling list-fn v0.19.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]  --> src/collection.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use super::*;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]  --> src/collection.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use super::*;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.08s
[INFO] running `Command { std: "docker" "inspect" "6c9125b2e9ba3a5d6e5e1f5d1b29fa4eb8e6dcdaf13e4b69959ffe6fdaf55b07", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6c9125b2e9ba3a5d6e5e1f5d1b29fa4eb8e6dcdaf13e4b69959ffe6fdaf55b07", kill_on_drop: false }`
[INFO] [stdout] 6c9125b2e9ba3a5d6e5e1f5d1b29fa4eb8e6dcdaf13e4b69959ffe6fdaf55b07
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-100/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-100/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] c37e7040bc321860ab625485156d95b38c24c0115924afc2d64bdb9881bfc565
[INFO] running `Command { std: "docker" "start" "-a" "c37e7040bc321860ab625485156d95b38c24c0115924afc2d64bdb9881bfc565", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `super::*`
[INFO] [stderr]  --> src/collection.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use super::*;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `list-fn` (lib) generated 1 warning
[INFO] [stderr] warning: `list-fn` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/list_fn-2ca3c261ddd6ab79)
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test flat_scan::tests::flat_scan_end ... ok
[INFO] [stdout] test tests::as_range ... 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 0.00s
[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" "c37e7040bc321860ab625485156d95b38c24c0115924afc2d64bdb9881bfc565", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c37e7040bc321860ab625485156d95b38c24c0115924afc2d64bdb9881bfc565", kill_on_drop: false }`
[INFO] [stdout] c37e7040bc321860ab625485156d95b38c24c0115924afc2d64bdb9881bfc565