[INFO] fetching crate tree 0.4.1...
[INFO] checking tree-0.4.1 against 1.55.0 for beta-1.56-3
[INFO] extracting crate tree 0.4.1 into /workspace/builds/worker-102/source
[INFO] validating manifest of crates.io crate tree 0.4.1 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "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-102/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded compare v0.0.6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-102/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-102/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] aead01753998ea5dbb6c842da8690f69c79cc51690ae017c0b2173c652d43ec7
[INFO] running `Command { std: "docker" "start" "-a" "aead01753998ea5dbb6c842da8690f69c79cc51690ae017c0b2173c652d43ec7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "aead01753998ea5dbb6c842da8690f69c79cc51690ae017c0b2173c652d43ec7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aead01753998ea5dbb6c842da8690f69c79cc51690ae017c0b2173c652d43ec7", kill_on_drop: false }`
[INFO] [stdout] aead01753998ea5dbb6c842da8690f69c79cc51690ae017c0b2173c652d43ec7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-102/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-102/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ba2a5c341598c927e960a4b438e4980327913381ff4a8589fac697b706a59a65
[INFO] running `Command { std: "docker" "start" "-a" "ba2a5c341598c927e960a4b438e4980327913381ff4a8589fac697b706a59a65", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking bit-vec v0.6.3
[INFO] [stderr]     Checking compare v0.0.6
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking env_logger v0.3.5
[INFO] [stderr]     Checking bit-set v0.5.2
[INFO] [stderr]     Checking ordered_iter v0.1.2
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking quickcheck v0.2.27
[INFO] [stderr]     Checking tree v0.4.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused macro definition
[INFO] [stdout]    --> src/node/iter.rs:121:1
[INFO] [stdout]     |
[INFO] [stdout] 121 | / macro_rules! bound {
[INFO] [stdout] 122 | |     ($iter:expr,
[INFO] [stdout] 123 | |      $cmp:expr,
[INFO] [stdout] 124 | |      $bound:expr,
[INFO] [stdout] ...   |
[INFO] [stdout] 164 | |     }
[INFO] [stdout] 165 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_macros)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/quickcheck.rs:14:29
[INFO] [stdout]    |
[INFO] [stdout] 14 |     fn shrink(&self) -> Box<Iterator<Item=Self>> {
[INFO] [stdout]    |                             ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item=Self>`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/quickcheck.rs:25:29
[INFO] [stdout]    |
[INFO] [stdout] 25 |     fn shrink(&self) -> Box<Iterator<Item=Self>> {
[INFO] [stdout]    |                             ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item=Self>`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused macro definition
[INFO] [stdout]    --> src/node/iter.rs:121:1
[INFO] [stdout]     |
[INFO] [stdout] 121 | / macro_rules! bound {
[INFO] [stdout] 122 | |     ($iter:expr,
[INFO] [stdout] 123 | |      $cmp:expr,
[INFO] [stdout] 124 | |      $bound:expr,
[INFO] [stdout] ...   |
[INFO] [stdout] 164 | |     }
[INFO] [stdout] 165 | | }
[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/node/test.rs:36:29
[INFO] [stdout]    |
[INFO] [stdout] 36 |     fn shrink(&self) -> Box<Iterator<Item=Self>> {
[INFO] [stdout]    |                             ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item=Self>`
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[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]    |                             ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item=Self>`
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[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]    |                             ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item=Self>`
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0061]: this function 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]     |                                                ^^^- supplied 0 arguments
[INFO] [stdout]     |                                                |
[INFO] [stdout]     |                                                expected 1 argument
[INFO] [stdout]     |
[INFO] [stdout] note: associated function defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0061]: this function 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]     |                                                ^^^- supplied 0 arguments
[INFO] [stdout]     |                                                |
[INFO] [stdout]     |                                                expected 1 argument
[INFO] [stdout]     |
[INFO] [stdout] note: associated function defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: the method `map` exists for struct `map::Map<T, (), C>`, but its trait bounds were not satisfied
[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]     |                                                      ^^^
[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
[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]     = 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[E0599]: the method `map` exists for struct `map::Map<T, (), C>`, but its trait bounds were not satisfied
[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]     |                                                      ^^^
[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
[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]     = 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 function 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]     |                                                ^^^- supplied 0 arguments
[INFO] [stdout]     |                                                |
[INFO] [stdout]     |                                                expected 1 argument
[INFO] [stdout]     |
[INFO] [stdout] note: associated function defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0061]: this function 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]     |                                                ^^^- supplied 0 arguments
[INFO] [stdout]     |                                                |
[INFO] [stdout]     |                                                expected 1 argument
[INFO] [stdout]     |
[INFO] [stdout] note: associated function defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: the method `map` exists for struct `map::Map<T, (), C>`, but its trait bounds were not satisfied
[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]     |                                                      ^^^
[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
[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]     = 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[E0599]: the method `map` exists for struct `map::Map<T, (), C>`, but its trait bounds were not satisfied
[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]     |                                                      ^^^
[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
[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]     = 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] warning: unused import: `Rng`
[INFO] [stdout]  --> src/node/test.rs:3:40
[INFO] [stdout]   |
[INFO] [stdout] 3 | use self::quickcheck::{Arbitrary, Gen, Rng, TestResult, quickcheck};
[INFO] [stdout]   |                                        ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors; 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0061, E0599.
[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] [stdout] For more information about an error, try `rustc --explain E0061`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tree` due to 5 previous errors; 5 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "ba2a5c341598c927e960a4b438e4980327913381ff4a8589fac697b706a59a65", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ba2a5c341598c927e960a4b438e4980327913381ff4a8589fac697b706a59a65", kill_on_drop: false }`
[INFO] [stdout] ba2a5c341598c927e960a4b438e4980327913381ff4a8589fac697b706a59a65
