[INFO] fetching crate better-ctx 3.1.0...
[INFO] checking better-ctx-3.1.0 against 95f0840caffecee2d5a8b374e44806c3a0d50ca1 for pr-163717-1
[INFO] extracting crate better-ctx 3.1.0 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate better-ctx 3.1.0
[INFO] finished tweaking crates.io crate better-ctx 3.1.0
[INFO] tweaked toml for crates.io crate better-ctx 3.1.0 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate better-ctx 3.1.0 on toolchain 95f0840caffecee2d5a8b374e44806c3a0d50ca1
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+95f0840caffecee2d5a8b374e44806c3a0d50ca1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate better-ctx 3.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+95f0840caffecee2d5a8b374e44806c3a0d50ca1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:77db811e55d90add9212f6832c23229e3de5f1c1f9905e8cb07319ea15df73ac" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] ec72e86b3be9831a7c927149cb9bfbb24e045fd2262b122d7c5d16567bfa2ac4
[INFO] running `Command { std: "docker" "start" "ec72e86b3be9831a7c927149cb9bfbb24e045fd2262b122d7c5d16567bfa2ac4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ec72e86b3be9831a7c927149cb9bfbb24e045fd2262b122d7c5d16567bfa2ac4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "ec72e86b3be9831a7c927149cb9bfbb24e045fd2262b122d7c5d16567bfa2ac4" "/opt/rustwide/cargo-home/bin/cargo" "+95f0840caffecee2d5a8b374e44806c3a0d50ca1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ec72e86b3be9831a7c927149cb9bfbb24e045fd2262b122d7c5d16567bfa2ac4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "ec72e86b3be9831a7c927149cb9bfbb24e045fd2262b122d7c5d16567bfa2ac4" "/opt/rustwide/cargo-home/bin/cargo" "+95f0840caffecee2d5a8b374e44806c3a0d50ca1" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
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[INFO] [stderr]    Compiling better-ctx v3.1.0 (/opt/rustwide/workdir)
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[INFO] [stderr]     Checking constant_time_eq v0.4.2
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[INFO] [stderr]     Checking rten v0.24.0
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[INFO] [stdout] error[E0277]: `T` cannot be shared between threads safely
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/rten-0.24.0/src/ops/pooling.rs:351:19
[INFO] [stdout]     |
[INFO] [stdout] 351 |           .for_each(|(mut out_item, in_item)| {
[INFO] [stdout]     |            -------- ^------------------------
[INFO] [stdout]     |            |        |
[INFO] [stdout]     |  __________|________within this `{closure@pooling.rs:351:19}`
[INFO] [stdout]     | |          |
[INFO] [stdout]     | |          required by a bound introduced by this call
[INFO] [stdout] 352 | |             let [_, out_h, out_w] = out_item.shape();
[INFO] [stdout] ...   |
[INFO] [stdout] 389 | |         });
[INFO] [stdout]     | |_________^ `T` cannot be shared between threads safely
[INFO] [stdout]     |
[INFO] [stdout] note: required because it appears within the type `std::marker::CopyClosureCaptureContainer<T>`
[INFO] [stdout]    --> /rustc/95f0840caffecee2d5a8b374e44806c3a0d50ca1/library/core/src/marker.rs:1399:11
[INFO] [stdout] note: required because `fold_init` is used within this closure
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/rten-0.24.0/src/ops/pooling.rs:344:29
[INFO] [stdout]     |
[INFO] [stdout] 344 |     let accum_init_val = || fold_init;
[INFO] [stdout]     |                             ^^^^^^^^^
[INFO] [stdout]     = note: required because it appears within the type `&{closure@pooling.rs:344:26}`
[INFO] [stdout] note: required because `accum_init_val` is used within this closure
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/rten-0.24.0/src/ops/pooling.rs:367:21
[INFO] [stdout]     |
[INFO] [stdout] 367 |                     accum_init_val(),
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^
[INFO] [stdout] note: required by a bound in `rayon::iter::ParallelIterator::for_each`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/rayon-1.12.0/src/iter/mod.rs:376:30
[INFO] [stdout]     |
[INFO] [stdout] 357 | pub trait ParallelIterator: Sized + Send {
[INFO] [stdout] ...
[INFO] [stdout] 374 |     fn for_each<OP>(self, op: OP)
[INFO] [stdout] 375 |     where
[INFO] [stdout] 376 |         OP: Fn(Self::Item) + Sync + Send,
[INFO] [stdout]     |                              ^^^^ required by this bound in `ParallelIterator::for_each`
[INFO] [stdout]     = note: the full name for the type has been written to '/opt/rustwide/target/debug/build/rten/6f256bdbde13c4c8/out/rten-6f256bdbde13c4c8.long-type-414181192915970779.txt'
[INFO] [stdout]     = note: consider using `--verbose` to print the full type name to the console
[INFO] [stdout] help: consider further restricting type parameter `T` with trait `Sync`
[INFO] [stdout]     |
[INFO] [stdout] 179 | fn pool_impl<T: Copy + Send + std::marker::Sync, F: Fn(T, T) -> T + Sync, A: Fn(T, usize) -> T + Sync>(
[INFO] [stdout]     |                             +++++++++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rten` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "ec72e86b3be9831a7c927149cb9bfbb24e045fd2262b122d7c5d16567bfa2ac4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ec72e86b3be9831a7c927149cb9bfbb24e045fd2262b122d7c5d16567bfa2ac4", kill_on_drop: false }`
[INFO] [stdout] ec72e86b3be9831a7c927149cb9bfbb24e045fd2262b122d7c5d16567bfa2ac4