[INFO] fetching crate rclist 0.0.1...
[INFO] checking rclist-0.0.1 against try#ea663bba38739867a4b75ac820991b4f5d093c3b for pr-62262-1
[INFO] extracting crate rclist 0.0.1 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate rclist 0.0.1 on toolchain ea663bba38739867a4b75ac820991b4f5d093c3b
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate rclist 0.0.1
[INFO] finished tweaking crates.io crate rclist 0.0.1
[INFO] tweaked toml for crates.io crate rclist 0.0.1 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] c327fb28d9b569d9993e49a638b15ad7e5446deabbcd34d779b67f2b1cfbcd5b
[INFO] running `"docker" "start" "-a" "c327fb28d9b569d9993e49a638b15ad7e5446deabbcd34d779b67f2b1cfbcd5b"`
[INFO] [stderr]     Checking rclist v0.0.1 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0599]: no method named `downgrade` found for type `&std::rc::Rc<T>` in the current scope
[INFO] [stderr]   --> src/lib.rs:31:50
[INFO] [stderr]    |
[INFO] [stderr] 31 |             &Link::Strong(ref x) => Link::Weak(x.downgrade()),
[INFO] [stderr]    |                                                --^^^^^^^^^
[INFO] [stderr]    |                                                | |
[INFO] [stderr]    |                                                | this is an associated function, not a method
[INFO] [stderr]    |                                                help: use associated function syntax instead: `std::rc::Rc::<T>::downgrade`
[INFO] [stderr]    |
[INFO] [stderr]    = note: found the following associated functions; to be used as methods, functions must have a `self` parameter
[INFO] [stderr]    = note: the candidate is defined in an impl for the type `std::rc::Rc<_>`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0599`.
[INFO] [stderr] error: could not compile `rclist`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error[E0599]: no method named `downgrade` found for type `&std::rc::Rc<T>` in the current scope
[INFO] [stderr]   --> src/lib.rs:31:50
[INFO] [stderr]    |
[INFO] [stderr] 31 |             &Link::Strong(ref x) => Link::Weak(x.downgrade()),
[INFO] [stderr]    |                                                --^^^^^^^^^
[INFO] [stderr]    |                                                | |
[INFO] [stderr]    |                                                | this is an associated function, not a method
[INFO] [stderr]    |                                                help: use associated function syntax instead: `std::rc::Rc::<T>::downgrade`
[INFO] [stderr]    |
[INFO] [stderr]    = note: found the following associated functions; to be used as methods, functions must have a `self` parameter
[INFO] [stderr]    = note: the candidate is defined in an impl for the type `std::rc::Rc<_>`
[INFO] [stderr] 
[INFO] [stderr] error[E0271]: type mismatch resolving `<RcListIter<u8> as std::iter::Iterator>::Item == &_`
[INFO] [stderr]   --> src/test.rs:12:41
[INFO] [stderr]    |
[INFO] [stderr] 12 |     let vempty : Vec<u8> = empty.iter().cloned().cloned().collect();
[INFO] [stderr]    |                                         ^^^^^^ expected struct `std::rc::Rc`, found reference
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `std::rc::Rc<Node<u8>>`
[INFO] [stderr]               found type `&_`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `cloned` found for type `std::iter::Cloned<RcListIter<u8>>` in the current scope
[INFO] [stderr]   --> src/test.rs:12:50
[INFO] [stderr]    |
[INFO] [stderr] 12 |     let vempty : Vec<u8> = empty.iter().cloned().cloned().collect();
[INFO] [stderr]    |                                                  ^^^^^^ method not found in `std::iter::Cloned<RcListIter<u8>>`
[INFO] [stderr]    |
[INFO] [stderr]    = note: the method `cloned` exists but the following trait bounds were not satisfied:
[INFO] [stderr]            `&mut std::iter::Cloned<RcListIter<u8>> : std::iter::Iterator`
[INFO] [stderr]            `std::iter::Cloned<RcListIter<u8>> : std::iter::Iterator`
[INFO] [stderr] 
[INFO] [stderr] error[E0271]: type mismatch resolving `<RcListIter<u8> as std::iter::Iterator>::Item == &_`
[INFO] [stderr]   --> src/test.rs:13:34
[INFO] [stderr]    |
[INFO] [stderr] 13 |     let v1 : Vec<u8> = s1.iter().cloned().cloned().collect();
[INFO] [stderr]    |                                  ^^^^^^ expected struct `std::rc::Rc`, found reference
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `std::rc::Rc<Node<u8>>`
[INFO] [stderr]               found type `&_`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `cloned` found for type `std::iter::Cloned<RcListIter<u8>>` in the current scope
[INFO] [stderr]   --> src/test.rs:13:43
[INFO] [stderr]    |
[INFO] [stderr] 13 |     let v1 : Vec<u8> = s1.iter().cloned().cloned().collect();
[INFO] [stderr]    |                                           ^^^^^^ method not found in `std::iter::Cloned<RcListIter<u8>>`
[INFO] [stderr]    |
[INFO] [stderr]    = note: the method `cloned` exists but the following trait bounds were not satisfied:
[INFO] [stderr]            `&mut std::iter::Cloned<RcListIter<u8>> : std::iter::Iterator`
[INFO] [stderr]            `std::iter::Cloned<RcListIter<u8>> : std::iter::Iterator`
[INFO] [stderr] 
[INFO] [stderr] error[E0271]: type mismatch resolving `<RcListIter<u8> as std::iter::Iterator>::Item == &_`
[INFO] [stderr]   --> src/test.rs:14:34
[INFO] [stderr]    |
[INFO] [stderr] 14 |     let v2 : Vec<u8> = s2.iter().cloned().cloned().collect();
[INFO] [stderr]    |                                  ^^^^^^ expected struct `std::rc::Rc`, found reference
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `std::rc::Rc<Node<u8>>`
[INFO] [stderr]               found type `&_`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `cloned` found for type `std::iter::Cloned<RcListIter<u8>>` in the current scope
[INFO] [stderr]   --> src/test.rs:14:43
[INFO] [stderr]    |
[INFO] [stderr] 14 |     let v2 : Vec<u8> = s2.iter().cloned().cloned().collect();
[INFO] [stderr]    |                                           ^^^^^^ method not found in `std::iter::Cloned<RcListIter<u8>>`
[INFO] [stderr]    |
[INFO] [stderr]    = note: the method `cloned` exists but the following trait bounds were not satisfied:
[INFO] [stderr]            `&mut std::iter::Cloned<RcListIter<u8>> : std::iter::Iterator`
[INFO] [stderr]            `std::iter::Cloned<RcListIter<u8>> : std::iter::Iterator`
[INFO] [stderr] 
[INFO] [stderr] error[E0271]: type mismatch resolving `<RcListIter<&str> as std::iter::Iterator>::Item == &_`
[INFO] [stderr]   --> src/test.rs:30:43
[INFO] [stderr]    |
[INFO] [stderr] 30 |     let vempty : Vec<&str> = empty.iter().cloned().cloned().collect();
[INFO] [stderr]    |                                           ^^^^^^ expected struct `std::rc::Rc`, found reference
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `std::rc::Rc<Node<&str>>`
[INFO] [stderr]               found type `&_`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `cloned` found for type `std::iter::Cloned<RcListIter<&str>>` in the current scope
[INFO] [stderr]   --> src/test.rs:30:52
[INFO] [stderr]    |
[INFO] [stderr] 30 |     let vempty : Vec<&str> = empty.iter().cloned().cloned().collect();
[INFO] [stderr]    |                                                    ^^^^^^ method not found in `std::iter::Cloned<RcListIter<&str>>`
[INFO] [stderr]    |
[INFO] [stderr]    = note: the method `cloned` exists but the following trait bounds were not satisfied:
[INFO] [stderr]            `&mut std::iter::Cloned<RcListIter<&str>> : std::iter::Iterator`
[INFO] [stderr]            `std::iter::Cloned<RcListIter<&str>> : std::iter::Iterator`
[INFO] [stderr] 
[INFO] [stderr] error[E0271]: type mismatch resolving `<RcListIter<&str> as std::iter::Iterator>::Item == &_`
[INFO] [stderr]   --> src/test.rs:31:36
[INFO] [stderr]    |
[INFO] [stderr] 31 |     let v1 : Vec<&str> = s1.iter().cloned().cloned().collect();
[INFO] [stderr]    |                                    ^^^^^^ expected struct `std::rc::Rc`, found reference
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `std::rc::Rc<Node<&str>>`
[INFO] [stderr]               found type `&_`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `cloned` found for type `std::iter::Cloned<RcListIter<&str>>` in the current scope
[INFO] [stderr]   --> src/test.rs:31:45
[INFO] [stderr]    |
[INFO] [stderr] 31 |     let v1 : Vec<&str> = s1.iter().cloned().cloned().collect();
[INFO] [stderr]    |                                             ^^^^^^ method not found in `std::iter::Cloned<RcListIter<&str>>`
[INFO] [stderr]    |
[INFO] [stderr]    = note: the method `cloned` exists but the following trait bounds were not satisfied:
[INFO] [stderr]            `&mut std::iter::Cloned<RcListIter<&str>> : std::iter::Iterator`
[INFO] [stderr]            `std::iter::Cloned<RcListIter<&str>> : std::iter::Iterator`
[INFO] [stderr] 
[INFO] [stderr] error[E0271]: type mismatch resolving `<RcListIter<&str> as std::iter::Iterator>::Item == &_`
[INFO] [stderr]   --> src/test.rs:32:36
[INFO] [stderr]    |
[INFO] [stderr] 32 |     let v2 : Vec<&str> = s2.iter().cloned().cloned().collect();
[INFO] [stderr]    |                                    ^^^^^^ expected struct `std::rc::Rc`, found reference
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `std::rc::Rc<Node<&str>>`
[INFO] [stderr]               found type `&_`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `cloned` found for type `std::iter::Cloned<RcListIter<&str>>` in the current scope
[INFO] [stderr]   --> src/test.rs:32:45
[INFO] [stderr]    |
[INFO] [stderr] 32 |     let v2 : Vec<&str> = s2.iter().cloned().cloned().collect();
[INFO] [stderr]    |                                             ^^^^^^ method not found in `std::iter::Cloned<RcListIter<&str>>`
[INFO] [stderr]    |
[INFO] [stderr]    = note: the method `cloned` exists but the following trait bounds were not satisfied:
[INFO] [stderr]            `&mut std::iter::Cloned<RcListIter<&str>> : std::iter::Iterator`
[INFO] [stderr]            `std::iter::Cloned<RcListIter<&str>> : std::iter::Iterator`
[INFO] [stderr] 
[INFO] [stderr] error[E0271]: type mismatch resolving `<RcListIter<std::string::String> as std::iter::Iterator>::Item == &_`
[INFO] [stderr]   --> src/test.rs:49:45
[INFO] [stderr]    |
[INFO] [stderr] 49 |     let vempty : Vec<String> = empty.iter().cloned().cloned().collect();
[INFO] [stderr]    |                                             ^^^^^^ expected struct `std::rc::Rc`, found reference
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `std::rc::Rc<Node<std::string::String>>`
[INFO] [stderr]               found type `&_`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `cloned` found for type `std::iter::Cloned<RcListIter<std::string::String>>` in the current scope
[INFO] [stderr]   --> src/test.rs:49:54
[INFO] [stderr]    |
[INFO] [stderr] 49 |     let vempty : Vec<String> = empty.iter().cloned().cloned().collect();
[INFO] [stderr]    |                                                      ^^^^^^ method not found in `std::iter::Cloned<RcListIter<std::string::String>>`
[INFO] [stderr]    |
[INFO] [stderr]    = note: the method `cloned` exists but the following trait bounds were not satisfied:
[INFO] [stderr]            `&mut std::iter::Cloned<RcListIter<std::string::String>> : std::iter::Iterator`
[INFO] [stderr]            `std::iter::Cloned<RcListIter<std::string::String>> : std::iter::Iterator`
[INFO] [stderr] 
[INFO] [stderr] error[E0271]: type mismatch resolving `<RcListIter<std::string::String> as std::iter::Iterator>::Item == &_`
[INFO] [stderr]   --> src/test.rs:50:38
[INFO] [stderr]    |
[INFO] [stderr] 50 |     let v1 : Vec<String> = s1.iter().cloned().cloned().collect();
[INFO] [stderr]    |                                      ^^^^^^ expected struct `std::rc::Rc`, found reference
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `std::rc::Rc<Node<std::string::String>>`
[INFO] [stderr]               found type `&_`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `cloned` found for type `std::iter::Cloned<RcListIter<std::string::String>>` in the current scope
[INFO] [stderr]   --> src/test.rs:50:47
[INFO] [stderr]    |
[INFO] [stderr] 50 |     let v1 : Vec<String> = s1.iter().cloned().cloned().collect();
[INFO] [stderr]    |                                               ^^^^^^ method not found in `std::iter::Cloned<RcListIter<std::string::String>>`
[INFO] [stderr]    |
[INFO] [stderr]    = note: the method `cloned` exists but the following trait bounds were not satisfied:
[INFO] [stderr]            `&mut std::iter::Cloned<RcListIter<std::string::String>> : std::iter::Iterator`
[INFO] [stderr]            `std::iter::Cloned<RcListIter<std::string::String>> : std::iter::Iterator`
[INFO] [stderr] 
[INFO] [stderr] error[E0271]: type mismatch resolving `<RcListIter<std::string::String> as std::iter::Iterator>::Item == &_`
[INFO] [stderr]   --> src/test.rs:51:38
[INFO] [stderr]    |
[INFO] [stderr] 51 |     let v2 : Vec<String> = s2.iter().cloned().cloned().collect();
[INFO] [stderr]    |                                      ^^^^^^ expected struct `std::rc::Rc`, found reference
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `std::rc::Rc<Node<std::string::String>>`
[INFO] [stderr]               found type `&_`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `cloned` found for type `std::iter::Cloned<RcListIter<std::string::String>>` in the current scope
[INFO] [stderr]   --> src/test.rs:51:47
[INFO] [stderr]    |
[INFO] [stderr] 51 |     let v2 : Vec<String> = s2.iter().cloned().cloned().collect();
[INFO] [stderr]    |                                               ^^^^^^ method not found in `std::iter::Cloned<RcListIter<std::string::String>>`
[INFO] [stderr]    |
[INFO] [stderr]    = note: the method `cloned` exists but the following trait bounds were not satisfied:
[INFO] [stderr]            `&mut std::iter::Cloned<RcListIter<std::string::String>> : std::iter::Iterator`
[INFO] [stderr]            `std::iter::Cloned<RcListIter<std::string::String>> : std::iter::Iterator`
[INFO] [stderr] 
[INFO] [stderr] error[E0271]: type mismatch resolving `<RcListIter<u8> as std::iter::Iterator>::Item == &_`
[INFO] [stderr]   --> src/test.rs:74:34
[INFO] [stderr]    |
[INFO] [stderr] 74 |     let v1 : Vec<u8> = s1.iter().cloned().cloned().collect();
[INFO] [stderr]    |                                  ^^^^^^ expected struct `std::rc::Rc`, found reference
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `std::rc::Rc<Node<u8>>`
[INFO] [stderr]               found type `&_`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `cloned` found for type `std::iter::Cloned<RcListIter<u8>>` in the current scope
[INFO] [stderr]   --> src/test.rs:74:43
[INFO] [stderr]    |
[INFO] [stderr] 74 |     let v1 : Vec<u8> = s1.iter().cloned().cloned().collect();
[INFO] [stderr]    |                                           ^^^^^^ method not found in `std::iter::Cloned<RcListIter<u8>>`
[INFO] [stderr]    |
[INFO] [stderr]    = note: the method `cloned` exists but the following trait bounds were not satisfied:
[INFO] [stderr]            `&mut std::iter::Cloned<RcListIter<u8>> : std::iter::Iterator`
[INFO] [stderr]            `std::iter::Cloned<RcListIter<u8>> : std::iter::Iterator`
[INFO] [stderr] 
[INFO] [stderr] error[E0271]: type mismatch resolving `<RcListIter<u8> as std::iter::Iterator>::Item == &_`
[INFO] [stderr]   --> src/test.rs:75:34
[INFO] [stderr]    |
[INFO] [stderr] 75 |     let v2 : Vec<u8> = s2.iter().cloned().cloned().collect();
[INFO] [stderr]    |                                  ^^^^^^ expected struct `std::rc::Rc`, found reference
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `std::rc::Rc<Node<u8>>`
[INFO] [stderr]               found type `&_`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `cloned` found for type `std::iter::Cloned<RcListIter<u8>>` in the current scope
[INFO] [stderr]   --> src/test.rs:75:43
[INFO] [stderr]    |
[INFO] [stderr] 75 |     let v2 : Vec<u8> = s2.iter().cloned().cloned().collect();
[INFO] [stderr]    |                                           ^^^^^^ method not found in `std::iter::Cloned<RcListIter<u8>>`
[INFO] [stderr]    |
[INFO] [stderr]    = note: the method `cloned` exists but the following trait bounds were not satisfied:
[INFO] [stderr]            `&mut std::iter::Cloned<RcListIter<u8>> : std::iter::Iterator`
[INFO] [stderr]            `std::iter::Cloned<RcListIter<u8>> : std::iter::Iterator`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 23 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0271, E0599.
[INFO] [stderr] For more information about an error, try `rustc --explain E0271`.
[INFO] [stderr] error: could not compile `rclist`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "c327fb28d9b569d9993e49a638b15ad7e5446deabbcd34d779b67f2b1cfbcd5b"`
[INFO] running `"docker" "rm" "-f" "c327fb28d9b569d9993e49a638b15ad7e5446deabbcd34d779b67f2b1cfbcd5b"`
[INFO] [stdout] c327fb28d9b569d9993e49a638b15ad7e5446deabbcd34d779b67f2b1cfbcd5b