[INFO] fetching crate xstd 0.2.0...
[INFO] testing xstd-0.2.0 against beta-2022-02-22 for beta-1.60-1
[INFO] extracting crate xstd 0.2.0 into /workspace/builds/worker-107/source
[INFO] validating manifest of crates.io crate xstd 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 xstd 0.2.0
[INFO] finished tweaking crates.io crate xstd 0.2.0
[INFO] tweaked toml for crates.io crate xstd 0.2.0 written to /workspace/builds/worker-107/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] [stderr]     Blocking waiting for file lock on package cache
[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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-107/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-107/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] a8e8cceaa308888c69f440b6334a9c461aa15bdf201314b1f9f694235ed3c167
[INFO] running `Command { std: "docker" "start" "-a" "a8e8cceaa308888c69f440b6334a9c461aa15bdf201314b1f9f694235ed3c167", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a8e8cceaa308888c69f440b6334a9c461aa15bdf201314b1f9f694235ed3c167", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a8e8cceaa308888c69f440b6334a9c461aa15bdf201314b1f9f694235ed3c167", kill_on_drop: false }`
[INFO] [stdout] a8e8cceaa308888c69f440b6334a9c461aa15bdf201314b1f9f694235ed3c167
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-107/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-107/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] d2592dd100ae03e6913b973e382ce97999cf519fdd6d44ca766bbcfdf0b42fa5
[INFO] running `Command { std: "docker" "start" "-a" "d2592dd100ae03e6913b973e382ce97999cf519fdd6d44ca766bbcfdf0b42fa5", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling xstd v0.2.0 (/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/vec.rs:21:14
[INFO] [stdout]    |
[INFO] [stdout] 21 |             .intersperse(&"\n")
[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 `intersperse_iter::IntersperseIterAdapter::intersperse(...)` to keep using the current method
[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/vec.rs:45:14
[INFO] [stdout]    |
[INFO] [stdout] 45 |             .intersperse(&" ")
[INFO] [stdout]    |              ^^^^^^^^^^^
[INFO] [stdout]    |
[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 `intersperse_iter::IntersperseIterAdapter::intersperse(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: missing documentation for a trait
[INFO] [stdout]  --> src/iter/intersperse_iter.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub trait IntersperseIterAdapter: Iterator {
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]  --> src/lib.rs:1:10
[INFO] [stdout]   |
[INFO] [stdout] 1 | #! [deny(missing_docs)]
[INFO] [stdout]   |          ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: missing documentation for an associated function
[INFO] [stdout]  --> src/iter/intersperse_iter.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | /     fn intersperse(self, elem: Self::Item) -> IntersperseIter<Self>
[INFO] [stdout] 3 | |     where
[INFO] [stdout] 4 | |         Self: Sized,
[INFO] [stdout] 5 | |         Self::Item: Clone,
[INFO] [stdout] 6 | |     {
[INFO] [stdout] 7 | |         IntersperseIter::new(self, elem)
[INFO] [stdout] 8 | |     }
[INFO] [stdout]   | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: missing documentation for a trait
[INFO] [stdout]  --> src/iter/memento_iter.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub trait MementoIterAdapter: Iterator {
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: missing documentation for an associated function
[INFO] [stdout]  --> src/iter/memento_iter.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | /     fn memento(self) -> MementoIter<Self>
[INFO] [stdout] 3 | |     where
[INFO] [stdout] 4 | |         Self: Sized,
[INFO] [stdout] 5 | |         Self::Item: Clone,
[INFO] [stdout] 6 | |     {
[INFO] [stdout] 7 | |         MementoIter::new(self)
[INFO] [stdout] 8 | |     }
[INFO] [stdout]   | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: missing documentation for an associated function
[INFO] [stdout]   --> src/vec.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     fn unlines(&self) -> String;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: missing documentation for an associated function
[INFO] [stdout]   --> src/vec.rs:40:5
[INFO] [stdout]    |
[INFO] [stdout] 40 |     fn unwords(&self) -> String;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: missing documentation for an associated function
[INFO] [stdout]   --> src/dynamic.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     fn is_instance_of<T: ?Sized + Any>(&self) -> bool {
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.84s
[INFO] running `Command { std: "docker" "inspect" "d2592dd100ae03e6913b973e382ce97999cf519fdd6d44ca766bbcfdf0b42fa5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d2592dd100ae03e6913b973e382ce97999cf519fdd6d44ca766bbcfdf0b42fa5", kill_on_drop: false }`
[INFO] [stdout] d2592dd100ae03e6913b973e382ce97999cf519fdd6d44ca766bbcfdf0b42fa5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-107/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-107/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] 70bf33917f79d4481bdc06343238ec3daeb5f04393076b6ff1e4a8468c36bbf1
[INFO] running `Command { std: "docker" "start" "-a" "70bf33917f79d4481bdc06343238ec3daeb5f04393076b6ff1e4a8468c36bbf1", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.36
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.86
[INFO] [stderr]    Compiling futures-core v0.3.21
[INFO] [stderr]    Compiling futures-channel v0.3.21
[INFO] [stderr]    Compiling futures-task v0.3.21
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling futures-util v0.3.21
[INFO] [stderr]    Compiling futures-sink v0.3.21
[INFO] [stderr]    Compiling slab v0.4.5
[INFO] [stderr]    Compiling pin-utils v0.1.0
[INFO] [stderr]    Compiling pin-project-lite v0.2.8
[INFO] [stderr]    Compiling futures-io v0.3.21
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]   --> src/vec.rs:21:14
[INFO] [stdout]    |
[INFO] [stdout] 21 |             .intersperse(&"\n")
[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 `intersperse_iter::IntersperseIterAdapter::intersperse(...)` to keep using the current method
[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/vec.rs:45:14
[INFO] [stdout]    |
[INFO] [stdout] 45 |             .intersperse(&" ")
[INFO] [stdout]    |              ^^^^^^^^^^^
[INFO] [stdout]    |
[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 `intersperse_iter::IntersperseIterAdapter::intersperse(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: missing documentation for a trait
[INFO] [stdout]  --> src/iter/intersperse_iter.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub trait IntersperseIterAdapter: Iterator {
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]  --> src/lib.rs:1:10
[INFO] [stdout]   |
[INFO] [stdout] 1 | #! [deny(missing_docs)]
[INFO] [stdout]   |          ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: missing documentation for an associated function
[INFO] [stdout]  --> src/iter/intersperse_iter.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | /     fn intersperse(self, elem: Self::Item) -> IntersperseIter<Self>
[INFO] [stdout] 3 | |     where
[INFO] [stdout] 4 | |         Self: Sized,
[INFO] [stdout] 5 | |         Self::Item: Clone,
[INFO] [stdout] 6 | |     {
[INFO] [stdout] 7 | |         IntersperseIter::new(self, elem)
[INFO] [stdout] 8 | |     }
[INFO] [stdout]   | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: missing documentation for a trait
[INFO] [stdout]  --> src/iter/memento_iter.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub trait MementoIterAdapter: Iterator {
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: missing documentation for an associated function
[INFO] [stdout]  --> src/iter/memento_iter.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | /     fn memento(self) -> MementoIter<Self>
[INFO] [stdout] 3 | |     where
[INFO] [stdout] 4 | |         Self: Sized,
[INFO] [stdout] 5 | |         Self::Item: Clone,
[INFO] [stdout] 6 | |     {
[INFO] [stdout] 7 | |         MementoIter::new(self)
[INFO] [stdout] 8 | |     }
[INFO] [stdout]   | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: missing documentation for an associated function
[INFO] [stdout]   --> src/vec.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     fn unlines(&self) -> String;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: missing documentation for an associated function
[INFO] [stdout]   --> src/vec.rs:40:5
[INFO] [stdout]    |
[INFO] [stdout] 40 |     fn unwords(&self) -> String;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: missing documentation for an associated function
[INFO] [stdout]   --> src/dynamic.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     fn is_instance_of<T: ?Sized + Any>(&self) -> bool {
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling quote v1.0.15
[INFO] [stderr]    Compiling futures-macro v0.3.21
[INFO] [stderr]    Compiling futures-executor v0.3.21
[INFO] [stderr]    Compiling futures v0.3.21
[INFO] [stderr]    Compiling xstd v0.2.0 (/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/vec.rs:21:14
[INFO] [stdout]    |
[INFO] [stdout] 21 |             .intersperse(&"\n")
[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 `intersperse_iter::IntersperseIterAdapter::intersperse(...)` to keep using the current method
[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/vec.rs:45:14
[INFO] [stdout]    |
[INFO] [stdout] 45 |             .intersperse(&" ")
[INFO] [stdout]    |              ^^^^^^^^^^^
[INFO] [stdout]    |
[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 `intersperse_iter::IntersperseIterAdapter::intersperse(...)` to keep using the current method
[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/iter/intersperse_iter.rs:75:50
[INFO] [stdout]    |
[INFO] [stdout] 75 |         let mut iter = std::iter::empty::<i32>().intersperse(100);
[INFO] [stdout]    |                                                  ^^^^^^^^^^^
[INFO] [stdout]    |
[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 `intersperse_iter::IntersperseIterAdapter::intersperse(...)` to keep using the current method
[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/iter/intersperse_iter.rs:81:43
[INFO] [stdout]    |
[INFO] [stdout] 81 |         let mut iter = std::iter::once(2).intersperse(100);
[INFO] [stdout]    |                                           ^^^^^^^^^^^
[INFO] [stdout]    |
[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 `intersperse_iter::IntersperseIterAdapter::intersperse(...)` to keep using the current method
[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/iter/intersperse_iter.rs:88:28
[INFO] [stdout]    |
[INFO] [stdout] 88 |         let iter = (1..=3).intersperse(100);
[INFO] [stdout]    |                            ^^^^^^^^^^^
[INFO] [stdout]    |
[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 `intersperse_iter::IntersperseIterAdapter::intersperse(...)` to keep using the current method
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 13.37s
[INFO] running `Command { std: "docker" "inspect" "70bf33917f79d4481bdc06343238ec3daeb5f04393076b6ff1e4a8468c36bbf1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "70bf33917f79d4481bdc06343238ec3daeb5f04393076b6ff1e4a8468c36bbf1", kill_on_drop: false }`
[INFO] [stdout] 70bf33917f79d4481bdc06343238ec3daeb5f04393076b6ff1e4a8468c36bbf1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-107/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-107/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] cb301d6d0e844421cf1fd4f94707241b24e8c2cd8c6638f23dacca5ff8ae4c43
[INFO] running `Command { std: "docker" "start" "-a" "cb301d6d0e844421cf1fd4f94707241b24e8c2cd8c6638f23dacca5ff8ae4c43", 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/vec.rs:21:14
[INFO] [stderr]    |
[INFO] [stderr] 21 |             .intersperse(&"\n")
[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 `intersperse_iter::IntersperseIterAdapter::intersperse(...)` to keep using the current method
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]   --> src/vec.rs:45:14
[INFO] [stderr]    |
[INFO] [stderr] 45 |             .intersperse(&" ")
[INFO] [stderr]    |              ^^^^^^^^^^^
[INFO] [stderr]    |
[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 `intersperse_iter::IntersperseIterAdapter::intersperse(...)` to keep using the current method
[INFO] [stderr] 
[INFO] [stderr] warning: missing documentation for a trait
[INFO] [stderr]  --> src/iter/intersperse_iter.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub trait IntersperseIterAdapter: Iterator {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr] note: the lint level is defined here
[INFO] [stderr]  --> src/lib.rs:1:10
[INFO] [stderr]   |
[INFO] [stderr] 1 | #! [deny(missing_docs)]
[INFO] [stderr]   |          ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: missing documentation for an associated function
[INFO] [stderr]  --> src/iter/intersperse_iter.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | /     fn intersperse(self, elem: Self::Item) -> IntersperseIter<Self>
[INFO] [stderr] 3 | |     where
[INFO] [stderr] 4 | |         Self: Sized,
[INFO] [stderr] 5 | |         Self::Item: Clone,
[INFO] [stderr] 6 | |     {
[INFO] [stderr] 7 | |         IntersperseIter::new(self, elem)
[INFO] [stderr] 8 | |     }
[INFO] [stderr]   | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: missing documentation for a trait
[INFO] [stderr]  --> src/iter/memento_iter.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub trait MementoIterAdapter: Iterator {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: missing documentation for an associated function
[INFO] [stderr]  --> src/iter/memento_iter.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | /     fn memento(self) -> MementoIter<Self>
[INFO] [stderr] 3 | |     where
[INFO] [stderr] 4 | |         Self: Sized,
[INFO] [stderr] 5 | |         Self::Item: Clone,
[INFO] [stderr] 6 | |     {
[INFO] [stderr] 7 | |         MementoIter::new(self)
[INFO] [stderr] 8 | |     }
[INFO] [stderr]   | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: missing documentation for an associated function
[INFO] [stderr]   --> src/vec.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     fn unlines(&self) -> String;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: missing documentation for an associated function
[INFO] [stderr]   --> src/vec.rs:40:5
[INFO] [stderr]    |
[INFO] [stderr] 40 |     fn unwords(&self) -> String;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: missing documentation for an associated function
[INFO] [stderr]   --> src/dynamic.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 |     fn is_instance_of<T: ?Sized + Any>(&self) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `xstd` (lib) generated 9 warnings
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]   --> src/iter/intersperse_iter.rs:75:50
[INFO] [stderr]    |
[INFO] [stderr] 75 |         let mut iter = std::iter::empty::<i32>().intersperse(100);
[INFO] [stderr]    |                                                  ^^^^^^^^^^^
[INFO] [stderr]    |
[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 `intersperse_iter::IntersperseIterAdapter::intersperse(...)` to keep using the current method
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]   --> src/iter/intersperse_iter.rs:81:43
[INFO] [stderr]    |
[INFO] [stderr] 81 |         let mut iter = std::iter::once(2).intersperse(100);
[INFO] [stderr]    |                                           ^^^^^^^^^^^
[INFO] [stderr]    |
[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 `intersperse_iter::IntersperseIterAdapter::intersperse(...)` to keep using the current method
[INFO] [stderr] 
[INFO] [stderr] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stderr]   --> src/iter/intersperse_iter.rs:88:28
[INFO] [stderr]    |
[INFO] [stderr] 88 |         let iter = (1..=3).intersperse(100);
[INFO] [stderr]    |                            ^^^^^^^^^^^
[INFO] [stderr]    |
[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 `intersperse_iter::IntersperseIterAdapter::intersperse(...)` to keep using the current method
[INFO] [stderr] 
[INFO] [stderr] warning: `xstd` (lib test) generated 5 warnings (2 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/xstd-925d3c984678b91f)
[INFO] [stdout] running 4 tests
[INFO] [stdout] test iter::intersperse_iter::tests::intersperse_between_elements ... ok
[INFO] [stdout] test iter::memento_iter::tests::a ... ok
[INFO] [stdout] test iter::intersperse_iter::tests::keep_empty_iter_empty ... ok
[INFO] [stdout] test iter::intersperse_iter::tests::keep_singleton_iter_singleton ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests xstd
[INFO] [stdout] 
[INFO] [stdout] running 7 tests
[INFO] [stdout] test src/dynamic.rs - dynamic::IsInstanceOf (line 7) ... ok
[INFO] [stdout] test src/vec.rs - vec::Unwords (line 32) ... ok
[INFO] [stdout] test src/macros.rs - macros::ifte (line 4) ... ok
[INFO] [stdout] test src/vec.rs - vec::Unlines (line 7) ... ok
[INFO] [stdout] test src/iter/memento_iter.rs - iter::memento_iter::MementoIter (line 17) ... ok
[INFO] [stdout] test src/iter/intersperse_iter.rs - iter::intersperse_iter::IntersperseIter (line 16) ... ok
[INFO] [stdout] test src/lib.rs - prelude (line 23) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 7 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 1.20s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "cb301d6d0e844421cf1fd4f94707241b24e8c2cd8c6638f23dacca5ff8ae4c43", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cb301d6d0e844421cf1fd4f94707241b24e8c2cd8c6638f23dacca5ff8ae4c43", kill_on_drop: false }`
[INFO] [stdout] cb301d6d0e844421cf1fd4f94707241b24e8c2cd8c6638f23dacca5ff8ae4c43