[INFO] fetching crate cb_fut 0.2.1...
[INFO] testing cb_fut-0.2.1 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate cb_fut 0.2.1 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate cb_fut 0.2.1
[INFO] finished tweaking crates.io crate cb_fut 0.2.1
[INFO] tweaked toml for crates.io crate cb_fut 0.2.1 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate cb_fut 0.2.1 on toolchain beta-2025-09-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 26 packages to latest compatible versions
[INFO] [stderr]       Adding crossbeam-channel v0.4.4 (available: v0.5.15)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d205ff23d9d310da3e1b452cb95adde315199a34a07ea8e4805107732f8342cb
[INFO] running `Command { std: "docker" "start" "-a" "d205ff23d9d310da3e1b452cb95adde315199a34a07ea8e4805107732f8342cb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d205ff23d9d310da3e1b452cb95adde315199a34a07ea8e4805107732f8342cb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d205ff23d9d310da3e1b452cb95adde315199a34a07ea8e4805107732f8342cb", kill_on_drop: false }`
[INFO] [stdout] d205ff23d9d310da3e1b452cb95adde315199a34a07ea8e4805107732f8342cb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0f49ca670a4ea7299ce07e69273afe3a9add03284e1b8ab28ed2a99b6b9aea54
[INFO] running `Command { std: "docker" "start" "-a" "0f49ca670a4ea7299ce07e69273afe3a9add03284e1b8ab28ed2a99b6b9aea54", kill_on_drop: false }`
[INFO] [stderr]    Compiling futures-sink v0.3.31
[INFO] [stderr]    Compiling futures-core v0.3.31
[INFO] [stderr]    Compiling memchr v2.7.6
[INFO] [stderr]    Compiling futures-io v0.3.31
[INFO] [stderr]    Compiling syn v2.0.106
[INFO] [stderr]    Compiling num_cpus v1.17.0
[INFO] [stderr]    Compiling futures-channel v0.3.31
[INFO] [stderr]    Compiling futures-macro v0.3.31
[INFO] [stderr]    Compiling futures-util v0.3.31
[INFO] [stderr]    Compiling futures-executor v0.3.31
[INFO] [stderr]    Compiling futures v0.3.31
[INFO] [stderr]    Compiling cb_fut v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 11.89s
[INFO] running `Command { std: "docker" "inspect" "0f49ca670a4ea7299ce07e69273afe3a9add03284e1b8ab28ed2a99b6b9aea54", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0f49ca670a4ea7299ce07e69273afe3a9add03284e1b8ab28ed2a99b6b9aea54", kill_on_drop: false }`
[INFO] [stdout] 0f49ca670a4ea7299ce07e69273afe3a9add03284e1b8ab28ed2a99b6b9aea54
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3fab8d7e7d2f60344ebd6a7920343c365ef54259900721bfc4c3646576689c94
[INFO] running `Command { std: "docker" "start" "-a" "3fab8d7e7d2f60344ebd6a7920343c365ef54259900721bfc4c3646576689c94", kill_on_drop: false }`
[INFO] [stderr]    Compiling cb_fut v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary braces around method argument
[INFO] [stdout]    --> src/lib.rs:666:71
[INFO] [stdout]     |
[INFO] [stdout] 666 |         futures::executor::block_on(once_blocked!(func(2 + 3, ->() -> {3i32})));
[INFO] [stdout]     |                                                                       ^    ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_braces)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these braces
[INFO] [stdout]     |
[INFO] [stdout] 666 -         futures::executor::block_on(once_blocked!(func(2 + 3, ->() -> {3i32})));
[INFO] [stdout] 666 +         futures::executor::block_on(once_blocked!(func(2 + 3, ->() -> 3i32)));
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around method argument
[INFO] [stdout]    --> src/lib.rs:728:64
[INFO] [stdout]     |
[INFO] [stdout] 728 |         futures::executor::block_on(once_blocked!(func(->() -> {3i32}, 2 + 3)));
[INFO] [stdout]     |                                                                ^    ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these braces
[INFO] [stdout]     |
[INFO] [stdout] 728 -         futures::executor::block_on(once_blocked!(func(->() -> {3i32}, 2 + 3)));
[INFO] [stdout] 728 +         futures::executor::block_on(once_blocked!(func(->() -> 3i32, 2 + 3)));
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.41s
[INFO] running `Command { std: "docker" "inspect" "3fab8d7e7d2f60344ebd6a7920343c365ef54259900721bfc4c3646576689c94", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3fab8d7e7d2f60344ebd6a7920343c365ef54259900721bfc4c3646576689c94", kill_on_drop: false }`
[INFO] [stdout] 3fab8d7e7d2f60344ebd6a7920343c365ef54259900721bfc4c3646576689c94
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] c92c8c9f1e3267d4475ddcc98f6f332fa6dadf776415e36fee2c5133f1a7e0bb
[INFO] running `Command { std: "docker" "start" "-a" "c92c8c9f1e3267d4475ddcc98f6f332fa6dadf776415e36fee2c5133f1a7e0bb", kill_on_drop: false }`
[INFO] [stderr] warning: unnecessary braces around method argument
[INFO] [stderr]    --> src/lib.rs:666:71
[INFO] [stderr]     |
[INFO] [stderr] 666 |         futures::executor::block_on(once_blocked!(func(2 + 3, ->() -> {3i32})));
[INFO] [stderr]     |                                                                       ^    ^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_braces)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: remove these braces
[INFO] [stderr]     |
[INFO] [stderr] 666 -         futures::executor::block_on(once_blocked!(func(2 + 3, ->() -> {3i32})));
[INFO] [stderr] 666 +         futures::executor::block_on(once_blocked!(func(2 + 3, ->() -> 3i32)));
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary braces around method argument
[INFO] [stderr]    --> src/lib.rs:728:64
[INFO] [stderr]     |
[INFO] [stderr] 728 |         futures::executor::block_on(once_blocked!(func(->() -> {3i32}, 2 + 3)));
[INFO] [stderr]     |                                                                ^    ^
[INFO] [stderr]     |
[INFO] [stderr] help: remove these braces
[INFO] [stderr]     |
[INFO] [stderr] 728 -         futures::executor::block_on(once_blocked!(func(->() -> {3i32}, 2 + 3)));
[INFO] [stderr] 728 +         futures::executor::block_on(once_blocked!(func(->() -> 3i32, 2 + 3)));
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: `cb_fut` (lib test) generated 2 warnings (run `cargo fix --lib -p cb_fut --tests` to apply 2 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/cb_fut-0e32138415f4168e)
[INFO] [stdout] 
[INFO] [stdout] running 21 tests
[INFO] [stdout] test tests::test_once_blocked_default_infix_no_args ... ok
[INFO] [stdout] test tests::test_once_blocked_default_postfix ... ok
[INFO] [stdout] test tests::test_once_blocked_default_prefix ... ok
[INFO] [stdout] test tests::test_once_blocked_postfix_with_logic ... ok
[INFO] [stdout] test tests::test_once_blocked_infix ... ok
[INFO] [stdout] test tests::test_once_blocked_default_prefix_no_args ... ok
[INFO] [stdout] test tests::test_once_blocked_postfix ... ok
[INFO] [stdout] test tests::test_once_blocked_prefix ... ok
[INFO] [stdout] test tests::test_stream_blocked_infix ... ok
[INFO] [stdout] test tests::test_stream_blocked_postfix ... ok
[INFO] [stdout] test tests::test_once_blocked_default_postfix_no_args ... ok
[INFO] [stdout] test tests::test_stream_postfix ... ok
[INFO] [stdout] test tests::test_stream_prefix ... ok
[INFO] [stdout] test tests::test_stream_prefix_no_args ... ok
[INFO] [stdout] test tests::test_stream_infix ... ok
[INFO] [stdout] test tests::test_stream_blocked_prefix ... ok
[INFO] [stdout] test tests::test_once_blocked_default_infix ... ok
[INFO] [stdout] test tests::test_once_infix ... ok
[INFO] [stderr]    Doc-tests cb_fut
[INFO] [stdout] test tests::test_once_postfix ... ok
[INFO] [stdout] test tests::test_once_postfix_no_args ... ok
[INFO] [stdout] test tests::test_once_prefix ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 21 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 2.01s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test src/lib.rs - stream (line 250) ... ok
[INFO] [stdout] test src/lib.rs - stream_blocked (line 318) ... ok
[INFO] [stdout] test src/lib.rs - once (line 65) ... ok
[INFO] [stdout] test src/lib.rs - once_blocked (line 132) ... ok
[INFO] [stdout] test src/lib.rs - once_blocked (line 147) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 3.33s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "c92c8c9f1e3267d4475ddcc98f6f332fa6dadf776415e36fee2c5133f1a7e0bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c92c8c9f1e3267d4475ddcc98f6f332fa6dadf776415e36fee2c5133f1a7e0bb", kill_on_drop: false }`
[INFO] [stdout] c92c8c9f1e3267d4475ddcc98f6f332fa6dadf776415e36fee2c5133f1a7e0bb