[INFO] fetching crate util 0.1.2...
[INFO] testing util-0.1.2 against master#62efba8a050c64249dab942951bb28f710208bc8 for pr-90799
[INFO] extracting crate util 0.1.2 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate util 0.1.2 on toolchain 62efba8a050c64249dab942951bb28f710208bc8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate util 0.1.2
[INFO] finished tweaking crates.io crate util 0.1.2
[INFO] tweaked toml for crates.io crate util 0.1.2 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "+62efba8a050c64249dab942951bb28f710208bc8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] af11900c4bfa8d87a5c73b47fe31aa3984db5b70bf25af4c5d28f6a93a308cee
[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" "af11900c4bfa8d87a5c73b47fe31aa3984db5b70bf25af4c5d28f6a93a308cee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "af11900c4bfa8d87a5c73b47fe31aa3984db5b70bf25af4c5d28f6a93a308cee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "af11900c4bfa8d87a5c73b47fe31aa3984db5b70bf25af4c5d28f6a93a308cee", kill_on_drop: false }`
[INFO] [stdout] af11900c4bfa8d87a5c73b47fe31aa3984db5b70bf25af4c5d28f6a93a308cee
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "+62efba8a050c64249dab942951bb28f710208bc8" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7aaf903cb64e323a6f7bc84fc1be04c4e37bb16f3b0b672e8e3c7ee4498680bb
[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" "7aaf903cb64e323a6f7bc84fc1be04c4e37bb16f3b0b672e8e3c7ee4498680bb", kill_on_drop: false }`
[INFO] [stderr]    Compiling util v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]   --> src/lib.rs:54:62
[INFO] [stdout]    |
[INFO] [stdout] 54 |         if k > self.len() { None } else { Some(unsafe { self.split_at_unchecked(k) }) }
[INFO] [stdout]    |                                                              ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unstable_name_collisions)]` on by default
[INFO] [stdout]    = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]    = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]    = help: call with fully qualified syntax `SliceExt::split_at_unchecked(...)` to keep using the current method
[INFO] [stdout]    = help: add `#![feature(slice_split_at_unchecked)]` to the crate attributes to enable `slice::<impl [T]>::split_at_unchecked`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.10s
[INFO] running `Command { std: "docker" "inspect" "7aaf903cb64e323a6f7bc84fc1be04c4e37bb16f3b0b672e8e3c7ee4498680bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7aaf903cb64e323a6f7bc84fc1be04c4e37bb16f3b0b672e8e3c7ee4498680bb", kill_on_drop: false }`
[INFO] [stdout] 7aaf903cb64e323a6f7bc84fc1be04c4e37bb16f3b0b672e8e3c7ee4498680bb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "+62efba8a050c64249dab942951bb28f710208bc8" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b529794a4477e546b2ad5685321f26f52b7a43edaa5baa9a52f20e622999b554
[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" "b529794a4477e546b2ad5685321f26f52b7a43edaa5baa9a52f20e622999b554", kill_on_drop: false }`
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]   --> src/lib.rs:54:62
[INFO] [stdout]    |
[INFO] [stdout] 54 |         if k > self.len() { None } else { Some(unsafe { self.split_at_unchecked(k) }) }
[INFO] [stdout]    |                                                              ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unstable_name_collisions)]` on by default
[INFO] [stdout]    = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]    = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]    = help: call with fully qualified syntax `SliceExt::split_at_unchecked(...)` to keep using the current method
[INFO] [stdout]    = help: add `#![feature(slice_split_at_unchecked)]` to the crate attributes to enable `slice::<impl [T]>::split_at_unchecked`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling util v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]   --> src/lib.rs:54:62
[INFO] [stdout]    |
[INFO] [stdout] 54 |         if k > self.len() { None } else { Some(unsafe { self.split_at_unchecked(k) }) }
[INFO] [stdout]    |                                                              ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unstable_name_collisions)]` on by default
[INFO] [stdout]    = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]    = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]    = help: call with fully qualified syntax `SliceExt::split_at_unchecked(...)` to keep using the current method
[INFO] [stdout]    = help: add `#![feature(slice_split_at_unchecked)]` to the crate attributes to enable `slice::<impl [T]>::split_at_unchecked`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.42s
[INFO] running `Command { std: "docker" "inspect" "b529794a4477e546b2ad5685321f26f52b7a43edaa5baa9a52f20e622999b554", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b529794a4477e546b2ad5685321f26f52b7a43edaa5baa9a52f20e622999b554", kill_on_drop: false }`
[INFO] [stdout] b529794a4477e546b2ad5685321f26f52b7a43edaa5baa9a52f20e622999b554
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "+62efba8a050c64249dab942951bb28f710208bc8" "test" "--frozen", 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] 2695e165c511018acd3c6f7c8dc0f771925745878c0966040de30dc17cc450e9
[INFO] running `Command { std: "docker" "start" "-a" "2695e165c511018acd3c6f7c8dc0f771925745878c0966040de30dc17cc450e9", kill_on_drop: false }`
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]   --> src/lib.rs:54:62
[INFO] [stderr]    |
[INFO] [stderr] 54 |         if k > self.len() { None } else { Some(unsafe { self.split_at_unchecked(k) }) }
[INFO] [stderr]    |                                                              ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unstable_name_collisions)]` on by default
[INFO] [stderr]    = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stderr]    = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stderr]    = help: call with fully qualified syntax `SliceExt::split_at_unchecked(...)` to keep using the current method
[INFO] [stderr]    = help: add `#![feature(slice_split_at_unchecked)]` to the crate attributes to enable `slice::<impl [T]>::split_at_unchecked`
[INFO] [stderr] 
[INFO] [stderr] warning: `util` (lib) generated 1 warning
[INFO] [stderr] warning: `util` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/util-dc207d47dc5f05fb)
[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 util
[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" "2695e165c511018acd3c6f7c8dc0f771925745878c0966040de30dc17cc450e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2695e165c511018acd3c6f7c8dc0f771925745878c0966040de30dc17cc450e9", kill_on_drop: false }`
[INFO] [stdout] 2695e165c511018acd3c6f7c8dc0f771925745878c0966040de30dc17cc450e9