[INFO] fetching crate intertwine 0.0.1...
[INFO] checking intertwine-0.0.1 against master#f609b7e0586f81fefb3523e3e17adf779ac416be for pr-129466-2
[INFO] extracting crate intertwine 0.0.1 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate intertwine 0.0.1 on toolchain f609b7e0586f81fefb3523e3e17adf779ac416be
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate intertwine 0.0.1
[INFO] finished tweaking crates.io crate intertwine 0.0.1
[INFO] tweaked toml for crates.io crate intertwine 0.0.1 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" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1cb379452a6b51a5a39daec5195d388cbee7b5b702cc6e6aa5a7b21e80412ef4
[INFO] running `Command { std: "docker" "start" "-a" "1cb379452a6b51a5a39daec5195d388cbee7b5b702cc6e6aa5a7b21e80412ef4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1cb379452a6b51a5a39daec5195d388cbee7b5b702cc6e6aa5a7b21e80412ef4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1cb379452a6b51a5a39daec5195d388cbee7b5b702cc6e6aa5a7b21e80412ef4", kill_on_drop: false }`
[INFO] [stdout] 1cb379452a6b51a5a39daec5195d388cbee7b5b702cc6e6aa5a7b21e80412ef4
[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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bdcfc0d971857b77b71c67e2647c81d59ce76e3af9aa80f78bfee5405be2c520
[INFO] running `Command { std: "docker" "start" "-a" "bdcfc0d971857b77b71c67e2647c81d59ce76e3af9aa80f78bfee5405be2c520", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] [stderr]     Checking intertwine v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] error: expected one of `)`, `,`, `.`, `?`, or an operator, found `{`
[INFO] [stdout]   --> src/lib.rs:26:26
[INFO] [stdout]    |
[INFO] [stdout] 26 |             spawn(proc() {
[INFO] [stdout]    |                         -^ expected one of `)`, `,`, `.`, `?`, or an operator
[INFO] [stdout]    |                         |
[INFO] [stdout]    |                         help: missing `,`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: expected one of `)`, `,`, `.`, `?`, or an operator, found `{`
[INFO] [stdout]   --> src/lib.rs:26:26
[INFO] [stdout]    |
[INFO] [stdout] 26 |             spawn(proc() {
[INFO] [stdout]    |                         -^ expected one of `)`, `,`, `.`, `?`, or an operator
[INFO] [stdout]    |                         |
[INFO] [stdout]    |                         help: missing `,`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::comm`
[INFO] [stdout]  --> src/lib.rs:7:10
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::comm::Receiver;
[INFO] [stdout]   |          ^^^^ could not find `comm` in `std`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::comm`
[INFO] [stdout]  --> src/lib.rs:7:10
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::comm::Receiver;
[INFO] [stdout]   |          ^^^^ could not find `comm` in `std`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `license` in this scope
[INFO] [stdout]  --> src/lib.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![license = "MIT"]
[INFO] [stdout]   |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `license` in this scope
[INFO] [stdout]  --> src/lib.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![license = "MIT"]
[INFO] [stdout]   |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `channel` in this scope
[INFO] [stdout]   --> src/lib.rs:22:24
[INFO] [stdout]    |
[INFO] [stdout] 22 |         let (tx, rx) = channel();
[INFO] [stdout]    |                        ^^^^^^^ not found in this scope
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing this function
[INFO] [stdout]    |
[INFO] [stdout] 7  + use std::sync::mpsc::channel;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `spawn` in this scope
[INFO] [stdout]   --> src/lib.rs:26:13
[INFO] [stdout]    |
[INFO] [stdout] 26 |             spawn(proc() {
[INFO] [stdout]    |             ^^^^^ not found in this scope
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing this function
[INFO] [stdout]    |
[INFO] [stdout] 7  + use std::thread::spawn;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `channel` in this scope
[INFO] [stdout]   --> src/lib.rs:22:24
[INFO] [stdout]    |
[INFO] [stdout] 22 |         let (tx, rx) = channel();
[INFO] [stdout]    |                        ^^^^^^^ not found in this scope
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing this function
[INFO] [stdout]    |
[INFO] [stdout] 7  + use std::sync::mpsc::channel;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `spawn` in this scope
[INFO] [stdout]   --> src/lib.rs:26:13
[INFO] [stdout]    |
[INFO] [stdout] 26 |             spawn(proc() {
[INFO] [stdout]    |             ^^^^^ not found in this scope
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing this function
[INFO] [stdout]    |
[INFO] [stdout] 7  + use std::thread::spawn;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0107]: trait takes 0 generic arguments but 1 generic argument was supplied
[INFO] [stdout]   --> src/lib.rs:20:18
[INFO] [stdout]    |
[INFO] [stdout] 20 | impl<T: Send, I: Iterator<T> + Send, II: Iterator<I>> Intertwine<T> for II {
[INFO] [stdout]    |                  ^^^^^^^^ expected 0 generic arguments
[INFO] [stdout]    |
[INFO] [stdout] help: replace the generic bound with the associated type
[INFO] [stdout]    |
[INFO] [stdout] 20 | impl<T: Send, I: Iterator<Item = T> + Send, II: Iterator<I>> Intertwine<T> for II {
[INFO] [stdout]    |                           ++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0107]: trait takes 0 generic arguments but 1 generic argument was supplied
[INFO] [stdout]   --> src/lib.rs:20:42
[INFO] [stdout]    |
[INFO] [stdout] 20 | impl<T: Send, I: Iterator<T> + Send, II: Iterator<I>> Intertwine<T> for II {
[INFO] [stdout]    |                                          ^^^^^^^^ expected 0 generic arguments
[INFO] [stdout]    |
[INFO] [stdout] help: replace the generic bound with the associated type
[INFO] [stdout]    |
[INFO] [stdout] 20 | impl<T: Send, I: Iterator<T> + Send, II: Iterator<Item = I>> Intertwine<T> for II {
[INFO] [stdout]    |                                                   ++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0107]: trait takes 0 generic arguments but 1 generic argument was supplied
[INFO] [stdout]   --> src/lib.rs:20:18
[INFO] [stdout]    |
[INFO] [stdout] 20 | impl<T: Send, I: Iterator<T> + Send, II: Iterator<I>> Intertwine<T> for II {
[INFO] [stdout]    |                  ^^^^^^^^ expected 0 generic arguments
[INFO] [stdout]    |
[INFO] [stdout] help: replace the generic bound with the associated type
[INFO] [stdout]    |
[INFO] [stdout] 20 | impl<T: Send, I: Iterator<Item = T> + Send, II: Iterator<I>> Intertwine<T> for II {
[INFO] [stdout]    |                           ++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0207]: the type parameter `I` is not constrained by the impl trait, self type, or predicates
[INFO] [stdout]   --> src/lib.rs:20:15
[INFO] [stdout]    |
[INFO] [stdout] 20 | impl<T: Send, I: Iterator<T> + Send, II: Iterator<I>> Intertwine<T> for II {
[INFO] [stdout]    |               ^ unconstrained type parameter
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0107]: trait takes 0 generic arguments but 1 generic argument was supplied
[INFO] [stdout]   --> src/lib.rs:20:42
[INFO] [stdout]    |
[INFO] [stdout] 20 | impl<T: Send, I: Iterator<T> + Send, II: Iterator<I>> Intertwine<T> for II {
[INFO] [stdout]    |                                          ^^^^^^^^ expected 0 generic arguments
[INFO] [stdout]    |
[INFO] [stdout] help: replace the generic bound with the associated type
[INFO] [stdout]    |
[INFO] [stdout] 20 | impl<T: Send, I: Iterator<T> + Send, II: Iterator<Item = I>> Intertwine<T> for II {
[INFO] [stdout]    |                                                   ++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0107]: trait takes 0 generic arguments but 1 generic argument was supplied
[INFO] [stdout]   --> src/lib.rs:39:15
[INFO] [stdout]    |
[INFO] [stdout] 39 | impl<T: Send> Iterator<T> for Intertwined<T> {
[INFO] [stdout]    |               ^^^^^^^^ expected 0 generic arguments
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0207]: the type parameter `I` is not constrained by the impl trait, self type, or predicates
[INFO] [stdout]   --> src/lib.rs:20:15
[INFO] [stdout]    |
[INFO] [stdout] 20 | impl<T: Send, I: Iterator<T> + Send, II: Iterator<I>> Intertwine<T> for II {
[INFO] [stdout]    |               ^ unconstrained type parameter
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0107]: trait takes 0 generic arguments but 1 generic argument was supplied
[INFO] [stdout]   --> src/lib.rs:39:15
[INFO] [stdout]    |
[INFO] [stdout] 39 | impl<T: Send> Iterator<T> for Intertwined<T> {
[INFO] [stdout]    |               ^^^^^^^^ expected 0 generic arguments
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0046]: not all trait items implemented, missing: `Item`
[INFO] [stdout]   --> src/lib.rs:39:1
[INFO] [stdout]    |
[INFO] [stdout] 39 | impl<T: Send> Iterator<T> for Intertwined<T> {
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ missing `Item` in implementation
[INFO] [stdout]    |
[INFO] [stdout]    = help: implement the missing item: `type Item = /* Type */;`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0046]: not all trait items implemented, missing: `Item`
[INFO] [stdout]   --> src/lib.rs:39:1
[INFO] [stdout]    |
[INFO] [stdout] 39 | impl<T: Send> Iterator<T> for Intertwined<T> {
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ missing `Item` in implementation
[INFO] [stdout]    |
[INFO] [stdout]    = help: implement the missing item: `type Item = /* Type */;`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: `T` cannot be sent between threads safely
[INFO] [stdout]   --> src/lib.rs:17:28
[INFO] [stdout]    |
[INFO] [stdout] 17 |     fn intertwine(self) -> Intertwined<T>;
[INFO] [stdout]    |                            ^^^^^^^^^^^^^^ `T` cannot be sent between threads safely
[INFO] [stdout]    |
[INFO] [stdout] note: required by a bound in `Intertwined`
[INFO] [stdout]   --> src/lib.rs:10:27
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct Intertwined<T: Send> {
[INFO] [stdout]    |                           ^^^^ required by this bound in `Intertwined`
[INFO] [stdout] help: consider restricting type parameter `T`
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub trait Intertwine<T: std::marker::Send> {
[INFO] [stdout]    |                       +++++++++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: `T` cannot be sent between threads safely
[INFO] [stdout]   --> src/lib.rs:17:28
[INFO] [stdout]    |
[INFO] [stdout] 17 |     fn intertwine(self) -> Intertwined<T>;
[INFO] [stdout]    |                            ^^^^^^^^^^^^^^ `T` cannot be sent between threads safely
[INFO] [stdout]    |
[INFO] [stdout] note: required by a bound in `Intertwined`
[INFO] [stdout]   --> src/lib.rs:10:27
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct Intertwined<T: Send> {
[INFO] [stdout]    |                           ^^^^ required by this bound in `Intertwined`
[INFO] [stdout] help: consider restricting type parameter `T`
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub trait Intertwine<T: std::marker::Send> {
[INFO] [stdout]    |                       +++++++++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `proc` in this scope
[INFO] [stdout]   --> src/lib.rs:26:19
[INFO] [stdout]    |
[INFO] [stdout] 26 |             spawn(proc() {
[INFO] [stdout]    |                   ^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `proc` in this scope
[INFO] [stdout]   --> src/lib.rs:26:19
[INFO] [stdout]    |
[INFO] [stdout] 26 |             spawn(proc() {
[INFO] [stdout]    |                   ^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: `<II as Iterator>::Item` is not an iterator
[INFO] [stdout]   --> src/lib.rs:27:26
[INFO] [stdout]    |
[INFO] [stdout] 27 |                 for x in iterator {
[INFO] [stdout]    |                          ^^^^^^^^ `<II as Iterator>::Item` is not an iterator
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `Iterator` is not implemented for `<II as Iterator>::Item`, which is required by `<II as Iterator>::Item: IntoIterator`
[INFO] [stdout]    = note: required for `<II as Iterator>::Item` to implement `IntoIterator`
[INFO] [stdout] help: consider further restricting the associated type
[INFO] [stdout]    |
[INFO] [stdout] 21 |     fn intertwine(mut self) -> Intertwined<T> where <II as Iterator>::Item: Iterator {
[INFO] [stdout]    |                                               ++++++++++++++++++++++++++++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: `<II as Iterator>::Item` is not an iterator
[INFO] [stdout]   --> src/lib.rs:27:26
[INFO] [stdout]    |
[INFO] [stdout] 27 |                 for x in iterator {
[INFO] [stdout]    |                          ^^^^^^^^ `<II as Iterator>::Item` is not an iterator
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `Iterator` is not implemented for `<II as Iterator>::Item`, which is required by `<II as Iterator>::Item: IntoIterator`
[INFO] [stdout]    = note: required for `<II as Iterator>::Item` to implement `IntoIterator`
[INFO] [stdout] help: consider further restricting the associated type
[INFO] [stdout]    |
[INFO] [stdout] 21 |     fn intertwine(mut self) -> Intertwined<T> where <II as Iterator>::Item: Iterator {
[INFO] [stdout]    |                                               ++++++++++++++++++++++++++++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 13 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0046, E0107, E0207, E0277, E0425, E0432.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0046`.
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 13 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0046, E0107, E0207, E0277, E0425, E0432.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0046`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `intertwine` (lib) due to 14 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `intertwine` (lib test) due to 14 previous errors
[INFO] running `Command { std: "docker" "inspect" "bdcfc0d971857b77b71c67e2647c81d59ce76e3af9aa80f78bfee5405be2c520", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bdcfc0d971857b77b71c67e2647c81d59ce76e3af9aa80f78bfee5405be2c520", kill_on_drop: false }`
[INFO] [stdout] bdcfc0d971857b77b71c67e2647c81d59ce76e3af9aa80f78bfee5405be2c520