[INFO] fetching crate xstd 0.2.0...
[INFO] checking xstd-0.2.0 against beta for pr-78714
[INFO] extracting crate xstd 0.2.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate xstd 0.2.0 on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", 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-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 841f5f7c91b2647dd7b805116709de60131c575dd5c96ff8350d48441a7b9b37
[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" "841f5f7c91b2647dd7b805116709de60131c575dd5c96ff8350d48441a7b9b37", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "841f5f7c91b2647dd7b805116709de60131c575dd5c96ff8350d48441a7b9b37", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "841f5f7c91b2647dd7b805116709de60131c575dd5c96ff8350d48441a7b9b37", kill_on_drop: false }`
[INFO] [stdout] 841f5f7c91b2647dd7b805116709de60131c575dd5c96ff8350d48441a7b9b37
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--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] 4318434ca60a6df8742a7106b176f2e1d988f8f8199b6b54c85d80451b537a73
[INFO] running `Command { std: "docker" "start" "-a" "4318434ca60a6df8742a7106b176f2e1d988f8f8199b6b54c85d80451b537a73", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.48
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling proc-macro-nested v0.1.6
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]     Checking once_cell v1.5.2
[INFO] [stderr]     Checking futures-core v0.3.8
[INFO] [stderr]     Checking futures-sink v0.3.8
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]     Checking futures-io v0.3.8
[INFO] [stderr]     Checking xstd v0.2.0 (/opt/rustwide/workdir)
[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 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] 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 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] error: 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] error: 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] error: 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] error: aborting due to 7 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `xstd`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "4318434ca60a6df8742a7106b176f2e1d988f8f8199b6b54c85d80451b537a73", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4318434ca60a6df8742a7106b176f2e1d988f8f8199b6b54c85d80451b537a73", kill_on_drop: false }`
[INFO] [stdout] 4318434ca60a6df8742a7106b176f2e1d988f8f8199b6b54c85d80451b537a73