[INFO] fetching crate xstd 0.2.0...
[INFO] checking xstd-0.2.0 against try#998b6603a58e47f42ccce7a67943234e96b6839e for pr-143170
[INFO] extracting crate xstd 0.2.0 into /workspace/builds/worker-0-tc2/source
[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-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate xstd 0.2.0 on toolchain 998b6603a58e47f42ccce7a67943234e96b6839e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "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" "+998b6603a58e47f42ccce7a67943234e96b6839e" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 17 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 340c871bec7b58f65b3f5fe82fe4f0b86b90be8bafc2fcf308175589d2ac9580
[INFO] running `Command { std: "docker" "start" "-a" "340c871bec7b58f65b3f5fe82fe4f0b86b90be8bafc2fcf308175589d2ac9580", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "340c871bec7b58f65b3f5fe82fe4f0b86b90be8bafc2fcf308175589d2ac9580", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "340c871bec7b58f65b3f5fe82fe4f0b86b90be8bafc2fcf308175589d2ac9580", kill_on_drop: false }`
[INFO] [stdout] 340c871bec7b58f65b3f5fe82fe4f0b86b90be8bafc2fcf308175589d2ac9580
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b7f29ac5d9ed7272ecb36f21f53d3032ac255028b44a1d0523db96418fead6ff
[INFO] running `Command { std: "docker" "start" "-a" "b7f29ac5d9ed7272ecb36f21f53d3032ac255028b44a1d0523db96418fead6ff", kill_on_drop: false }`
[INFO] [stderr]     Checking futures-sink v0.3.31
[INFO] [stderr]     Checking xstd v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling syn v2.0.104
[INFO] [stderr]     Checking futures-channel v0.3.31
[INFO] [stdout] warning: a method 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]    = 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]    = note: `#[warn(unstable_name_collisions)]` on by default
[INFO] [stdout] help: add `#![feature(iter_intersperse)]` to the crate attributes to enable `intersperse`
[INFO] [stdout]   --> src/lib.rs:6:1
[INFO] [stdout]    |
[INFO] [stdout] 6  + #![feature(iter_intersperse)]
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: a method 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] help: add `#![feature(iter_intersperse)]` to the crate attributes to enable `intersperse`
[INFO] [stdout]   --> src/lib.rs:6:1
[INFO] [stdout]    |
[INFO] [stdout] 6  + #![feature(iter_intersperse)]
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: 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] error: missing documentation for a method
[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]   | |__________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: 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] error: missing documentation for a method
[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]   | |__________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: missing documentation for a method
[INFO] [stdout]   --> src/vec.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     fn unlines(&self) -> String;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: missing documentation for a method
[INFO] [stdout]   --> src/vec.rs:40:5
[INFO] [stdout]    |
[INFO] [stdout] 40 |     fn unwords(&self) -> String;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: missing documentation for a method
[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] [stderr] error: could not compile `xstd` (lib) due to 7 previous errors; 2 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "b7f29ac5d9ed7272ecb36f21f53d3032ac255028b44a1d0523db96418fead6ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b7f29ac5d9ed7272ecb36f21f53d3032ac255028b44a1d0523db96418fead6ff", kill_on_drop: false }`
[INFO] [stdout] b7f29ac5d9ed7272ecb36f21f53d3032ac255028b44a1d0523db96418fead6ff