[INFO] fetching crate cow_vec_item 0.5.1...
[INFO] testing cow_vec_item-0.5.1 against try#722e1797249a965b6335aebd65d777f917e498f1 for pr-91031
[INFO] extracting crate cow_vec_item 0.5.1 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate cow_vec_item 0.5.1 on toolchain 722e1797249a965b6335aebd65d777f917e498f1
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate cow_vec_item 0.5.1
[INFO] finished tweaking crates.io crate cow_vec_item 0.5.1
[INFO] tweaked toml for crates.io crate cow_vec_item 0.5.1 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "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-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 78e1e0457de2233e12064aa67545709c711f52279b48c77ae677a946b7f0cd31
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "78e1e0457de2233e12064aa67545709c711f52279b48c77ae677a946b7f0cd31", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "78e1e0457de2233e12064aa67545709c711f52279b48c77ae677a946b7f0cd31", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "78e1e0457de2233e12064aa67545709c711f52279b48c77ae677a946b7f0cd31", kill_on_drop: false }`
[INFO] [stdout] 78e1e0457de2233e12064aa67545709c711f52279b48c77ae677a946b7f0cd31
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 93b2fc618cf2efeb87401f700d7eb802bcd3ec96c344f8d938befbdbf48e927d
[INFO] running `Command { std: "docker" "start" "-a" "93b2fc618cf2efeb87401f700d7eb802bcd3ec96c344f8d938befbdbf48e927d", kill_on_drop: false }`
[INFO] [stderr]    Compiling cow_vec_item v0.5.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.43s
[INFO] running `Command { std: "docker" "inspect" "93b2fc618cf2efeb87401f700d7eb802bcd3ec96c344f8d938befbdbf48e927d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "93b2fc618cf2efeb87401f700d7eb802bcd3ec96c344f8d938befbdbf48e927d", kill_on_drop: false }`
[INFO] [stdout] 93b2fc618cf2efeb87401f700d7eb802bcd3ec96c344f8d938befbdbf48e927d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] f38321789a9c479a14e17577199e69e96bc9fdfb54ce29374e1d7efa102e688c
[INFO] running `Command { std: "docker" "start" "-a" "f38321789a9c479a14e17577199e69e96bc9fdfb54ce29374e1d7efa102e688c", kill_on_drop: false }`
[INFO] [stderr]    Compiling cow_vec_item v0.5.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.83s
[INFO] running `Command { std: "docker" "inspect" "f38321789a9c479a14e17577199e69e96bc9fdfb54ce29374e1d7efa102e688c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f38321789a9c479a14e17577199e69e96bc9fdfb54ce29374e1d7efa102e688c", kill_on_drop: false }`
[INFO] [stdout] f38321789a9c479a14e17577199e69e96bc9fdfb54ce29374e1d7efa102e688c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] f2d72dcd8d754696e34d69934b9e03aed66bf1eded5c66ff96b268006e5cdfca
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "f2d72dcd8d754696e34d69934b9e03aed66bf1eded5c66ff96b268006e5cdfca", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stdout] running 33 tests
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/cow_vec_item-50ed387b96f4ad76)
[INFO] [stdout] test tests::bench_cowvec_fast_for_each_owned_case ... ok
[INFO] [stdout] test tests::bench_cowvec_for_each ... ok
[INFO] [stdout] test tests::test_cornercase3 ... ok
[INFO] [stdout] test tests::test_eager_cloned_iter_mut ... ok
[INFO] [stdout] test tests::bench_vec ... ok
[INFO] [stdout] test tests::test_iter_nth ... ok
[INFO] [stdout] test tests::test_for_each_owning ... ok
[INFO] [stdout] test tests::test_for_each_not_always_owning ... ok
[INFO] [stdout] test tests::test_cornercase2 ... ok
[INFO] [stdout] test tests::test_fast_for_each ... ok
[INFO] [stdout] test tests::test_fast_for_each2 ... ok
[INFO] [stdout] test tests::test_iter_count_and_size_hint ... ok
[INFO] [stdout] test tests::bench_cowvec ... ok
[INFO] [stdout] test tests::bench_cowvec_fast_for_each ... ok
[INFO] [stdout] test tests::test_short_fuzz ... ok
[INFO] [stdout] test tests::test_cornercase1 ... ok
[INFO] [stdout] test tests::test_basics1 ... ok
[INFO] [stdout] test tests::bench_cowvec_eager_iter_mut ... ok
[INFO] [stdout] test tests::test_fuzz ... ok
[INFO] [stdout] test tests::test_fast_for_each_empty ... ok
[INFO] [stdout] test tests::test_zero_size_for_fast_each ... ok
[INFO] [stdout] test tests::test_zero_size_for_each2 ... ok
[INFO] [stdout] test tests::test_two_back_to_back_iter_mut_should_be_allowed ... ok
[INFO] [stdout] test tests::test_zero_size_for_each ... ok
[INFO] [stdout] test tests::test_with_empty_vec ... ok
[INFO] [stdout] test tests::test_taking_ownership ... ok
[INFO] [stdout] test tests::test_iter_nth2 ... ok
[INFO] [stdout] test tests::test_simultaneous_iter_allowed ... ok
[INFO] [stdout] test tests::test_ref_items ... ok
[INFO] [stdout] test tests::test_mut_twice ... ok
[INFO] [stdout] test tests::bench_vec_clone ... ok
[INFO] [stdout] test tests::test_zero_size_iter_mut ... ok
[INFO] [stdout] test tests::test_ensure_retaining_iterated_value_causes_panic - should panic ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 33 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.03s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests cow_vec_item
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - (line 20) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.64s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "f2d72dcd8d754696e34d69934b9e03aed66bf1eded5c66ff96b268006e5cdfca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f2d72dcd8d754696e34d69934b9e03aed66bf1eded5c66ff96b268006e5cdfca", kill_on_drop: false }`
[INFO] [stdout] f2d72dcd8d754696e34d69934b9e03aed66bf1eded5c66ff96b268006e5cdfca