[INFO] fetching crate iter-skak 0.2.0...
[INFO] checking iter-skak-0.2.0 against master#9610dfe5a9a731ced1ea4923ecbd0c57fe367898 for beta-170-4
[INFO] extracting crate iter-skak 0.2.0 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate iter-skak 0.2.0 on toolchain 9610dfe5a9a731ced1ea4923ecbd0c57fe367898
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9610dfe5a9a731ced1ea4923ecbd0c57fe367898" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate iter-skak 0.2.0
[INFO] finished tweaking crates.io crate iter-skak 0.2.0
[INFO] tweaked toml for crates.io crate iter-skak 0.2.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" __CARGO_TEST_CHANNEL_OVERRIDE_DO_NOT_USE_THIS="nightly" "/workspace/cargo-home/bin/cargo" "+9610dfe5a9a731ced1ea4923ecbd0c57fe367898" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9610dfe5a9a731ced1ea4923ecbd0c57fe367898" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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@sha256:19e73879b68f455e41552ea35293514db52ea292d993f571636dbffedb77a1ee" "/opt/rustwide/cargo-home/bin/cargo" "+9610dfe5a9a731ced1ea4923ecbd0c57fe367898" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b9aaa7a69c01a045d77126e20e37373b53b6b229fbd11aa1934716f28c3ed813
[INFO] running `Command { std: "docker" "start" "-a" "b9aaa7a69c01a045d77126e20e37373b53b6b229fbd11aa1934716f28c3ed813", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b9aaa7a69c01a045d77126e20e37373b53b6b229fbd11aa1934716f28c3ed813", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b9aaa7a69c01a045d77126e20e37373b53b6b229fbd11aa1934716f28c3ed813", kill_on_drop: false }`
[INFO] [stdout] b9aaa7a69c01a045d77126e20e37373b53b6b229fbd11aa1934716f28c3ed813
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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@sha256:19e73879b68f455e41552ea35293514db52ea292d993f571636dbffedb77a1ee" "/opt/rustwide/cargo-home/bin/cargo" "+9610dfe5a9a731ced1ea4923ecbd0c57fe367898" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 70c73570c8dfcacbe9c8826e4d5e35384a3c8f8f496dab62a1643bd299943110
[INFO] running `Command { std: "docker" "start" "-a" "70c73570c8dfcacbe9c8826e4d5e35384a3c8f8f496dab62a1643bd299943110", kill_on_drop: false }`
[INFO] [stderr]     Checking iter-skak v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0053]: method `advance_by` has an incompatible type for trait
[INFO] [stdout]    --> src/lib.rs:110:43
[INFO] [stdout]     |
[INFO] [stdout] 110 |     fn advance_by(&mut self, n: usize) -> Result<(), usize> {
[INFO] [stdout]     |                                           ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |                                           |
[INFO] [stdout]     |                                           expected `NonZeroUsize`, found `usize`
[INFO] [stdout]     |                                           help: change the output type to match the trait: `Result<(), NonZeroUsize>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected signature `fn(&mut Skip<I>, _) -> Result<_, NonZeroUsize>`
[INFO] [stdout]                found signature `fn(&mut Skip<I>, _) -> Result<_, usize>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0053]: method `advance_by` has an incompatible type for trait
[INFO] [stdout]    --> src/lib.rs:110:43
[INFO] [stdout]     |
[INFO] [stdout] 110 |     fn advance_by(&mut self, n: usize) -> Result<(), usize> {
[INFO] [stdout]     |                                           ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |                                           |
[INFO] [stdout]     |                                           expected `NonZeroUsize`, found `usize`
[INFO] [stdout]     |                                           help: change the output type to match the trait: `Result<(), NonZeroUsize>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected signature `fn(&mut Skip<I>, _) -> Result<_, NonZeroUsize>`
[INFO] [stdout]                found signature `fn(&mut Skip<I>, _) -> Result<_, usize>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `saturating_sub` found for struct `NonZeroUsize` in the current scope
[INFO] [stdout]    --> src/lib.rs:120:54
[INFO] [stdout]     |
[INFO] [stdout] 120 |                 let advanced_without_skip = advanced.saturating_sub(self.n);
[INFO] [stdout]     |                                                      ^^^^^^^^^^^^^^ help: there is a method with a similar name: `saturating_mul`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `saturating_sub` found for struct `NonZeroUsize` in the current scope
[INFO] [stdout]    --> src/lib.rs:120:54
[INFO] [stdout]     |
[INFO] [stdout] 120 |                 let advanced_without_skip = advanced.saturating_sub(self.n);
[INFO] [stdout]     |                                                      ^^^^^^^^^^^^^^ help: there is a method with a similar name: `saturating_mul`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/lib.rs:121:48
[INFO] [stdout]     |
[INFO] [stdout] 121 |                 self.n = self.n.saturating_sub(advanced);
[INFO] [stdout]     |                                 -------------- ^^^^^^^^ expected `usize`, found `NonZeroUsize`
[INFO] [stdout]     |                                 |
[INFO] [stdout]     |                                 arguments to this method are incorrect
[INFO] [stdout]     |
[INFO] [stdout] note: method defined here
[INFO] [stdout]    --> /rustc/9610dfe5a9a731ced1ea4923ecbd0c57fe367898/library/core/src/num/mod.rs:1274:5
[INFO] [stdout]     = note: this error originates in the macro `uint_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: call `Into::into` on this expression to convert `NonZeroUsize` into `usize`
[INFO] [stdout]     |
[INFO] [stdout] 121 |                 self.n = self.n.saturating_sub(advanced.into());
[INFO] [stdout]     |                                                        +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/lib.rs:121:48
[INFO] [stdout]     |
[INFO] [stdout] 121 |                 self.n = self.n.saturating_sub(advanced);
[INFO] [stdout]     |                                 -------------- ^^^^^^^^ expected `usize`, found `NonZeroUsize`
[INFO] [stdout]     |                                 |
[INFO] [stdout]     |                                 arguments to this method are incorrect
[INFO] [stdout]     |
[INFO] [stdout] note: method defined here
[INFO] [stdout]    --> /rustc/9610dfe5a9a731ced1ea4923ecbd0c57fe367898/library/core/src/num/mod.rs:1274:5
[INFO] [stdout]     = note: this error originates in the macro `uint_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: call `Into::into` on this expression to convert `NonZeroUsize` into `usize`
[INFO] [stdout]     |
[INFO] [stdout] 121 |                 self.n = self.n.saturating_sub(advanced.into());
[INFO] [stdout]     |                                                        +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/lib.rs:129:32
[INFO] [stdout]     |
[INFO] [stdout] 129 |                 ret @ Ok(_) => ret,
[INFO] [stdout]     |                                ^^^ expected `Result<(), usize>`, found `Result<(), NonZeroUsize>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected enum `Result<_, usize>`
[INFO] [stdout]                found enum `Result<_, NonZeroUsize>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/lib.rs:129:32
[INFO] [stdout]     |
[INFO] [stdout] 129 |                 ret @ Ok(_) => ret,
[INFO] [stdout]     |                                ^^^ expected `Result<(), usize>`, found `Result<(), NonZeroUsize>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected enum `Result<_, usize>`
[INFO] [stdout]                found enum `Result<_, NonZeroUsize>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: cannot subtract-assign `NonZeroUsize` from `usize`
[INFO] [stdout]    --> src/lib.rs:131:25
[INFO] [stdout]     |
[INFO] [stdout] 131 |                     rem -= advanced;
[INFO] [stdout]     |                         ^^ no implementation for `usize -= NonZeroUsize`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `SubAssign<NonZeroUsize>` is not implemented for `usize`
[INFO] [stdout]     = help: the following other types implement trait `SubAssign<Rhs>`:
[INFO] [stdout]               <usize as SubAssign<&usize>>
[INFO] [stdout]               <usize as SubAssign>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: cannot subtract-assign `NonZeroUsize` from `usize`
[INFO] [stdout]    --> src/lib.rs:131:25
[INFO] [stdout]     |
[INFO] [stdout] 131 |                     rem -= advanced;
[INFO] [stdout]     |                         ^^ no implementation for `usize -= NonZeroUsize`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `SubAssign<NonZeroUsize>` is not implemented for `usize`
[INFO] [stdout]     = help: the following other types implement trait `SubAssign<Rhs>`:
[INFO] [stdout]               <usize as SubAssign<&usize>>
[INFO] [stdout]               <usize as SubAssign>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 5 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0053, E0277, E0308, E0599.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0053`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `iter-skak` (lib) due to 6 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: aborting due to 5 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0053, E0277, E0308, E0599.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0053`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `iter-skak` (lib test) due to 6 previous errors
[INFO] running `Command { std: "docker" "inspect" "70c73570c8dfcacbe9c8826e4d5e35384a3c8f8f496dab62a1643bd299943110", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "70c73570c8dfcacbe9c8826e4d5e35384a3c8f8f496dab62a1643bd299943110", kill_on_drop: false }`
[INFO] [stdout] 70c73570c8dfcacbe9c8826e4d5e35384a3c8f8f496dab62a1643bd299943110
