[INFO] fetching crate tree 0.4.1...
[INFO] testing tree-0.4.1 against 1.75.0 for beta-1.76-1
[INFO] extracting crate tree 0.4.1 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate tree 0.4.1 on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate tree 0.4.1
[INFO] finished tweaking crates.io crate tree 0.4.1
[INFO] tweaked toml for crates.io crate tree 0.4.1 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded compare v0.0.6
[INFO] [stderr]   Downloaded quickcheck v0.2.27
[INFO] [stderr]   Downloaded ordered_iter v0.1.2
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] be86ef0a8c74f97409efa60d7d2d65d8ddd6299961a2cd39a7e30288176d9441
[INFO] running `Command { std: "docker" "start" "-a" "be86ef0a8c74f97409efa60d7d2d65d8ddd6299961a2cd39a7e30288176d9441", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "be86ef0a8c74f97409efa60d7d2d65d8ddd6299961a2cd39a7e30288176d9441", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "be86ef0a8c74f97409efa60d7d2d65d8ddd6299961a2cd39a7e30288176d9441", kill_on_drop: false }`
[INFO] [stdout] be86ef0a8c74f97409efa60d7d2d65d8ddd6299961a2cd39a7e30288176d9441
[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=warn" "-e" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e7db7a3bda9bf0595fa47c622cf568cddb28d6077c338abfd6748be96ca87610
[INFO] running `Command { std: "docker" "start" "-a" "e7db7a3bda9bf0595fa47c622cf568cddb28d6077c338abfd6748be96ca87610", kill_on_drop: false }`
[INFO] [stderr]    Compiling winapi-build v0.1.1
[INFO] [stderr]    Compiling winapi v0.2.8
[INFO] [stderr]    Compiling regex-syntax v0.3.9
[INFO] [stderr]    Compiling utf8-ranges v0.1.3
[INFO] [stderr]    Compiling bit-vec v0.6.3
[INFO] [stderr]    Compiling log v0.3.9
[INFO] [stderr]    Compiling compare v0.0.6
[INFO] [stderr]    Compiling memchr v0.1.11
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling kernel32-sys v0.2.2
[INFO] [stderr]    Compiling aho-corasick v0.5.3
[INFO] [stderr]    Compiling bit-set v0.5.3
[INFO] [stderr]    Compiling thread-id v2.0.0
[INFO] [stderr]    Compiling thread_local v0.2.7
[INFO] [stderr]    Compiling ordered_iter v0.1.2
[INFO] [stderr]    Compiling rand v0.3.23
[INFO] [stderr]    Compiling regex v0.1.80
[INFO] [stderr]    Compiling env_logger v0.3.5
[INFO] [stderr]    Compiling quickcheck v0.2.27
[INFO] [stderr]    Compiling tree v0.4.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused macro definition: `bound`
[INFO] [stdout]    --> src/node/iter.rs:121:14
[INFO] [stdout]     |
[INFO] [stdout] 121 | macro_rules! bound {
[INFO] [stdout]     |              ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_macros)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/quickcheck.rs:14:29
[INFO] [stdout]    |
[INFO] [stdout] 14 |     fn shrink(&self) -> Box<Iterator<Item=Self>> {
[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]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 14 |     fn shrink(&self) -> Box<dyn Iterator<Item=Self>> {
[INFO] [stdout]    |                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/quickcheck.rs:25:29
[INFO] [stdout]    |
[INFO] [stdout] 25 |     fn shrink(&self) -> Box<Iterator<Item=Self>> {
[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] 25 |     fn shrink(&self) -> Box<dyn Iterator<Item=Self>> {
[INFO] [stdout]    |                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0061]: this method takes 1 argument but 0 arguments were supplied
[INFO] [stdout]    --> src/set.rs:235:48
[INFO] [stdout]     |
[INFO] [stdout] 235 |     pub fn max(&self) -> Option<&T> { self.map.max().map(|e| e.0) }
[INFO] [stdout]     |                                                ^^^-- an argument of type `map::Map<T, (), C>` is missing
[INFO] [stdout]     |
[INFO] [stdout] note: method defined here
[INFO] [stdout]    --> /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/cmp.rs:826:8
[INFO] [stdout] help: provide the argument
[INFO] [stdout]     |
[INFO] [stdout] 235 |     pub fn max(&self) -> Option<&T> { self.map.max(/* map::Map<T, (), C> */).map(|e| e.0) }
[INFO] [stdout]     |                                                   ~~~~~~~~~~~~~~~~~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: `map::Map<T, (), C>` is not an iterator
[INFO] [stdout]    --> src/set.rs:235:54
[INFO] [stdout]     |
[INFO] [stdout] 235 |     pub fn max(&self) -> Option<&T> { self.map.max().map(|e| e.0) }
[INFO] [stdout]     |                                                      ^^^ `map::Map<T, (), C>` is not an iterator
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/map.rs:22:1
[INFO] [stdout]     |
[INFO] [stdout] 22  | pub struct Map<K, V, C = Natural<K>> where C: Compare<K> {
[INFO] [stdout]     | ------------------------------------
[INFO] [stdout]     | |
[INFO] [stdout]     | method `map` not found for this struct
[INFO] [stdout]     | doesn't satisfy `map::Map<T, (), C>: Iterator`
[INFO] [stdout]     |
[INFO] [stdout]     = note: the following trait bounds were not satisfied:
[INFO] [stdout]             `map::Map<T, (), C>: Iterator`
[INFO] [stdout]             which is required by `&mut map::Map<T, (), C>: Iterator`
[INFO] [stdout] note: the trait `Iterator` must be implemented
[INFO] [stdout]    --> /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/iter/traits/iterator.rs:75:1
[INFO] [stdout]     = help: items from traits can only be used if the trait is implemented and in scope
[INFO] [stdout]     = note: the following trait defines an item `map`, perhaps you need to implement it:
[INFO] [stdout]             candidate #1: `Iterator`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0061]: this method takes 1 argument but 0 arguments were supplied
[INFO] [stdout]    --> src/set.rs:291:48
[INFO] [stdout]     |
[INFO] [stdout] 291 |     pub fn min(&self) -> Option<&T> { self.map.min().map(|e| e.0) }
[INFO] [stdout]     |                                                ^^^-- an argument of type `map::Map<T, (), C>` is missing
[INFO] [stdout]     |
[INFO] [stdout] note: method defined here
[INFO] [stdout]    --> /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/cmp.rs:846:8
[INFO] [stdout] help: provide the argument
[INFO] [stdout]     |
[INFO] [stdout] 291 |     pub fn min(&self) -> Option<&T> { self.map.min(/* map::Map<T, (), C> */).map(|e| e.0) }
[INFO] [stdout]     |                                                   ~~~~~~~~~~~~~~~~~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: `map::Map<T, (), C>` is not an iterator
[INFO] [stdout]    --> src/set.rs:291:54
[INFO] [stdout]     |
[INFO] [stdout] 291 |     pub fn min(&self) -> Option<&T> { self.map.min().map(|e| e.0) }
[INFO] [stdout]     |                                                      ^^^ `map::Map<T, (), C>` is not an iterator
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/map.rs:22:1
[INFO] [stdout]     |
[INFO] [stdout] 22  | pub struct Map<K, V, C = Natural<K>> where C: Compare<K> {
[INFO] [stdout]     | ------------------------------------
[INFO] [stdout]     | |
[INFO] [stdout]     | method `map` not found for this struct
[INFO] [stdout]     | doesn't satisfy `map::Map<T, (), C>: Iterator`
[INFO] [stdout]     |
[INFO] [stdout]     = note: the following trait bounds were not satisfied:
[INFO] [stdout]             `map::Map<T, (), C>: Iterator`
[INFO] [stdout]             which is required by `&mut map::Map<T, (), C>: Iterator`
[INFO] [stdout] note: the trait `Iterator` must be implemented
[INFO] [stdout]    --> /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/iter/traits/iterator.rs:75:1
[INFO] [stdout]     = help: items from traits can only be used if the trait is implemented and in scope
[INFO] [stdout]     = note: the following trait defines an item `map`, perhaps you need to implement it:
[INFO] [stdout]             candidate #1: `Iterator`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors; 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0061, E0599.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0061`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tree` (lib) due to 5 previous errors; 3 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "e7db7a3bda9bf0595fa47c622cf568cddb28d6077c338abfd6748be96ca87610", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e7db7a3bda9bf0595fa47c622cf568cddb28d6077c338abfd6748be96ca87610", kill_on_drop: false }`
[INFO] [stdout] e7db7a3bda9bf0595fa47c622cf568cddb28d6077c338abfd6748be96ca87610
