[INFO] fetching crate discrimination 0.0.2...
[INFO] checking discrimination-0.0.2 against try#f6d7c613ae2d161ff37dbc63cc5abd809c878597 for pr-83850
[INFO] extracting crate discrimination 0.0.2 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate discrimination 0.0.2 on toolchain f6d7c613ae2d161ff37dbc63cc5abd809c878597
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6d7c613ae2d161ff37dbc63cc5abd809c878597" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate discrimination 0.0.2
[INFO] finished tweaking crates.io crate discrimination 0.0.2
[INFO] tweaked toml for crates.io crate discrimination 0.0.2 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6d7c613ae2d161ff37dbc63cc5abd809c878597" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6d7c613ae2d161ff37dbc63cc5abd809c878597" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:ac0d0aa6ec8ed129e241004a6179c99fa0d2616f50ba759c5b60bd26d0fafa02" "/opt/rustwide/cargo-home/bin/cargo" "+f6d7c613ae2d161ff37dbc63cc5abd809c878597" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d124e389ef754670643525bdbabfd5d0e2c1e5843351b109974fff271dd69f50
[INFO] running `Command { std: "docker" "start" "-a" "d124e389ef754670643525bdbabfd5d0e2c1e5843351b109974fff271dd69f50", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d124e389ef754670643525bdbabfd5d0e2c1e5843351b109974fff271dd69f50", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d124e389ef754670643525bdbabfd5d0e2c1e5843351b109974fff271dd69f50", kill_on_drop: false }`
[INFO] [stdout] d124e389ef754670643525bdbabfd5d0e2c1e5843351b109974fff271dd69f50
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:ac0d0aa6ec8ed129e241004a6179c99fa0d2616f50ba759c5b60bd26d0fafa02" "/opt/rustwide/cargo-home/bin/cargo" "+f6d7c613ae2d161ff37dbc63cc5abd809c878597" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5f85f3d2f386c4034d25f4d676d802928d0dd0fc16a9799e8830021482aeb682
[INFO] running `Command { std: "docker" "start" "-a" "5f85f3d2f386c4034d25f4d676d802928d0dd0fc16a9799e8830021482aeb682", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]     Checking owning_ref v0.2.4
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking smallvec v0.6.14
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking thread-id v3.3.0
[INFO] [stderr]     Checking parking_lot_core v0.2.14
[INFO] [stderr]     Checking parking_lot v0.3.8
[INFO] [stderr]     Checking discrimination v0.0.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/discriminator.rs:98:24
[INFO] [stdout]    |
[INFO] [stdout] 98 |     Trivial(Option<Box<DoubleEndedIterator<Item = (K, V)> + 'a>>),
[INFO] [stdout]    |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 98 -     Trivial(Option<Box<DoubleEndedIterator<Item = (K, V)> + 'a>>),
[INFO] [stdout] 98 +     Trivial(Option<Box<dyn DoubleEndedIterator<Item = (K, V)> + 'a>>),
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/discriminator.rs:101:16
[INFO] [stdout]     |
[INFO] [stdout] 101 |     Opaque(Box<DoubleEndedIterator<Item = DiscriminateSortedGroup<'a, K, V>> + 'a>),
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 101 -     Opaque(Box<DoubleEndedIterator<Item = DiscriminateSortedGroup<'a, K, V>> + 'a>),
[INFO] [stdout] 101 +     Opaque(Box<dyn DoubleEndedIterator<Item = DiscriminateSortedGroup<'a, K, V>> + 'a>),
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/discriminator.rs:227:17
[INFO] [stdout]     |
[INFO] [stdout] 227 |     Trivial(Box<DoubleEndedIterator<Item = (K, V)> + 'a>),
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 227 -     Trivial(Box<DoubleEndedIterator<Item = (K, V)> + 'a>),
[INFO] [stdout] 227 +     Trivial(Box<dyn DoubleEndedIterator<Item = (K, V)> + 'a>),
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/discriminator.rs:229:16
[INFO] [stdout]     |
[INFO] [stdout] 229 |     Opaque(Box<DoubleEndedIterator<Item = V> + 'a>),
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 229 -     Opaque(Box<DoubleEndedIterator<Item = V> + 'a>),
[INFO] [stdout] 229 +     Opaque(Box<dyn DoubleEndedIterator<Item = V> + 'a>),
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/discriminator.rs:98:24
[INFO] [stdout]    |
[INFO] [stdout] 98 |     Trivial(Option<Box<DoubleEndedIterator<Item = (K, V)> + 'a>>),
[INFO] [stdout]    |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 98 -     Trivial(Option<Box<DoubleEndedIterator<Item = (K, V)> + 'a>>),
[INFO] [stdout] 98 +     Trivial(Option<Box<dyn DoubleEndedIterator<Item = (K, V)> + 'a>>),
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/discriminator.rs:101:16
[INFO] [stdout]     |
[INFO] [stdout] 101 |     Opaque(Box<DoubleEndedIterator<Item = DiscriminateSortedGroup<'a, K, V>> + 'a>),
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 101 -     Opaque(Box<DoubleEndedIterator<Item = DiscriminateSortedGroup<'a, K, V>> + 'a>),
[INFO] [stdout] 101 +     Opaque(Box<dyn DoubleEndedIterator<Item = DiscriminateSortedGroup<'a, K, V>> + 'a>),
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/discriminator.rs:227:17
[INFO] [stdout]     |
[INFO] [stdout] 227 |     Trivial(Box<DoubleEndedIterator<Item = (K, V)> + 'a>),
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 227 -     Trivial(Box<DoubleEndedIterator<Item = (K, V)> + 'a>),
[INFO] [stdout] 227 +     Trivial(Box<dyn DoubleEndedIterator<Item = (K, V)> + 'a>),
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/discriminator.rs:229:16
[INFO] [stdout]     |
[INFO] [stdout] 229 |     Opaque(Box<DoubleEndedIterator<Item = V> + 'a>),
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 229 -     Opaque(Box<DoubleEndedIterator<Item = V> + 'a>),
[INFO] [stdout] 229 +     Opaque(Box<dyn DoubleEndedIterator<Item = V> + 'a>),
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/discriminator.rs:449:13
[INFO] [stdout]     |
[INFO] [stdout] 449 | /             &Map(conv,
[INFO] [stdout] 450 | |                  Natural { limit: ::std::u8::MAX as usize,
[INFO] [stdout] 451 | |                            is_unchecked: true, });
[INFO] [stdout]     | |_________________________________________________^ expected fn pointer, found fn item
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected reference `&'static discriminator::Map<fn(u8) -> usize, Natural>`
[INFO] [stdout]                found reference `&discriminator::Map<fn(u8) -> usize {<U8 as Discriminator<'a, u8>>::discriminate_sorted::conv}, Natural>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/discriminator.rs:449:13
[INFO] [stdout]     |
[INFO] [stdout] 449 | /             &Map(conv,
[INFO] [stdout] 450 | |                  Natural { limit: ::std::u8::MAX as usize,
[INFO] [stdout] 451 | |                            is_unchecked: true, });
[INFO] [stdout]     | |_________________________________________________^ expected fn pointer, found fn item
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected reference `&'static discriminator::Map<fn(u8) -> usize, Natural>`
[INFO] [stdout]                found reference `&discriminator::Map<fn(u8) -> usize {<U8 as Discriminator<'a, u8>>::discriminate_sorted::conv}, Natural>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/discriminator.rs:479:17
[INFO] [stdout]     |
[INFO] [stdout] 479 | /                 &Map(conv,
[INFO] [stdout] 480 | |                      Natural { limit: ::std::u16::MAX as usize,
[INFO] [stdout] 481 | |                                is_unchecked: true, });
[INFO] [stdout]     | |_____________________________________________________^ expected fn pointer, found fn item
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected reference `&'static discriminator::Map<fn(u16) -> usize, Natural>`
[INFO] [stdout]                found reference `&discriminator::Map<fn(u16) -> usize {<U16 as Discriminator<'a, u16>>::discriminate_sorted::conv}, Natural>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/discriminator.rs:479:17
[INFO] [stdout]     |
[INFO] [stdout] 479 | /                 &Map(conv,
[INFO] [stdout] 480 | |                      Natural { limit: ::std::u16::MAX as usize,
[INFO] [stdout] 481 | |                                is_unchecked: true, });
[INFO] [stdout]     | |_____________________________________________________^ expected fn pointer, found fn item
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected reference `&'static discriminator::Map<fn(u16) -> usize, Natural>`
[INFO] [stdout]                found reference `&discriminator::Map<fn(u16) -> usize {<U16 as Discriminator<'a, u16>>::discriminate_sorted::conv}, Natural>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors; 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `discrimination` due to 3 previous errors; 4 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: aborting due to 2 previous errors; 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `discrimination` due to 3 previous errors; 4 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "5f85f3d2f386c4034d25f4d676d802928d0dd0fc16a9799e8830021482aeb682", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5f85f3d2f386c4034d25f4d676d802928d0dd0fc16a9799e8830021482aeb682", kill_on_drop: false }`
[INFO] [stdout] 5f85f3d2f386c4034d25f4d676d802928d0dd0fc16a9799e8830021482aeb682