[INFO] fetching crate wist 0.1.7...
[INFO] checking wist-0.1.7 against master#cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c for pr-143170
[INFO] extracting crate wist 0.1.7 into /workspace/builds/worker-4-tc1/source
[INFO] removed /workspace/builds/worker-4-tc1/source/rust-toolchain.toml
[INFO] started tweaking crates.io crate wist 0.1.7
[INFO] finished tweaking crates.io crate wist 0.1.7
[INFO] tweaked toml for crates.io crate wist 0.1.7 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate wist 0.1.7 on toolchain cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate wist 0.1.7 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" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded wisp-mux v5.1.0
[INFO] [stderr]   Downloaded whisk v0.13.0
[INFO] [stderr]   Downloaded atomic_enum v0.3.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6cd08f6e804b2fb027f82fad606dfa6b587f4aeb27c2be5b030b695c86fd0ef4
[INFO] running `Command { std: "docker" "start" "-a" "6cd08f6e804b2fb027f82fad606dfa6b587f4aeb27c2be5b030b695c86fd0ef4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6cd08f6e804b2fb027f82fad606dfa6b587f4aeb27c2be5b030b695c86fd0ef4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6cd08f6e804b2fb027f82fad606dfa6b587f4aeb27c2be5b030b695c86fd0ef4", kill_on_drop: false }`
[INFO] [stdout] 6cd08f6e804b2fb027f82fad606dfa6b587f4aeb27c2be5b030b695c86fd0ef4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0214808c3e454a8609ede58f55f235453234aba6e2c47217e24fddf19dad8066
[INFO] running `Command { std: "docker" "start" "-a" "0214808c3e454a8609ede58f55f235453234aba6e2c47217e24fddf19dad8066", kill_on_drop: false }`
[INFO] [stderr]     Checking futures-core v0.3.31
[INFO] [stderr]     Checking futures-sink v0.3.31
[INFO] [stderr]     Checking futures-task v0.3.31
[INFO] [stderr]     Checking pin-project-lite v0.2.16
[INFO] [stderr]     Checking either v1.15.0
[INFO] [stderr]     Checking futures-io v0.3.31
[INFO] [stderr]     Checking whisk v0.13.0
[INFO] [stderr]     Checking spin v0.10.0
[INFO] [stderr]     Checking futures-channel v0.3.31
[INFO] [stderr]     Checking futures-util v0.3.31
[INFO] [stderr]     Checking itertools v0.14.0
[INFO] [stderr]     Checking futures v0.3.31
[INFO] [stderr]     Checking wist v0.1.7 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `future::poll_fn`
[INFO] [stdout]  --> src/lib.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | use core::{future::poll_fn, mem::{replace, take}, task::Poll};
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `future::poll_fn`
[INFO] [stdout]  --> src/lib.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | use core::{future::poll_fn, mem::{replace, take}, task::Poll};
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `items`
[INFO] [stdout]   --> src/lib.rs:50:28
[INFO] [stdout]    |
[INFO] [stdout] 50 |             WsFrame::Bytes(items) => 0x0,
[INFO] [stdout]    |                            ^^^^^ help: if this is intentional, prefix it with an underscore: `_items`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `items`
[INFO] [stdout]   --> src/lib.rs:50:28
[INFO] [stdout]    |
[INFO] [stdout] 50 |             WsFrame::Bytes(items) => 0x0,
[INFO] [stdout]    |                            ^^^^^ help: if this is intentional, prefix it with an underscore: `_items`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stdout]    --> src/lib.rs:104:5
[INFO] [stdout]     |
[INFO] [stdout] 104 |     async fn req(&mut self, a: &[u8]) -> Result<Vec<u8>, Self::Error>;
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stdout]     = note: `#[warn(async_fn_in_trait)]` on by default
[INFO] [stdout] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stdout]     |
[INFO] [stdout] 104 -     async fn req(&mut self, a: &[u8]) -> Result<Vec<u8>, Self::Error>;
[INFO] [stdout] 104 +     fn req(&mut self, a: &[u8]) -> impl std::future::Future<Output = Result<Vec<u8>, Self::Error>> + Send;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of `async fn` in public traits is discouraged as auto trait bounds cannot be specified
[INFO] [stdout]    --> src/lib.rs:104:5
[INFO] [stdout]     |
[INFO] [stdout] 104 |     async fn req(&mut self, a: &[u8]) -> Result<Vec<u8>, Self::Error>;
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: you can suppress this lint if you plan to use the trait only in your own code, or do not care about auto traits like `Send` on the `Future`
[INFO] [stdout]     = note: `#[warn(async_fn_in_trait)]` on by default
[INFO] [stdout] help: you can alternatively desugar to a normal `fn` that returns `impl Future` and add any desired bounds such as `Send`, but these cannot be relaxed without a breaking API change
[INFO] [stdout]     |
[INFO] [stdout] 104 -     async fn req(&mut self, a: &[u8]) -> Result<Vec<u8>, Self::Error>;
[INFO] [stdout] 104 +     fn req(&mut self, a: &[u8]) -> impl std::future::Future<Output = Result<Vec<u8>, Self::Error>> + Send;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.46s
[INFO] running `Command { std: "docker" "inspect" "0214808c3e454a8609ede58f55f235453234aba6e2c47217e24fddf19dad8066", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0214808c3e454a8609ede58f55f235453234aba6e2c47217e24fddf19dad8066", kill_on_drop: false }`
[INFO] [stdout] 0214808c3e454a8609ede58f55f235453234aba6e2c47217e24fddf19dad8066