[INFO] fetching crate teewriter 0.1.0...
[INFO] testing teewriter-0.1.0 against beta-2026-01-20 for beta-1.94-1
[INFO] extracting crate teewriter 0.1.0 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate teewriter 0.1.0
[INFO] finished tweaking crates.io crate teewriter 0.1.0
[INFO] tweaked toml for crates.io crate teewriter 0.1.0 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate teewriter 0.1.0 on toolchain beta-2026-01-20
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-01-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate teewriter 0.1.0 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" "+beta-2026-01-20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-01-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d84e93cae7682dcf5446e95de3022d6dbfcea575beaade26d50eb27086bc5181
[INFO] running `Command { std: "docker" "start" "-a" "d84e93cae7682dcf5446e95de3022d6dbfcea575beaade26d50eb27086bc5181", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d84e93cae7682dcf5446e95de3022d6dbfcea575beaade26d50eb27086bc5181", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d84e93cae7682dcf5446e95de3022d6dbfcea575beaade26d50eb27086bc5181", kill_on_drop: false }`
[INFO] [stdout] d84e93cae7682dcf5446e95de3022d6dbfcea575beaade26d50eb27086bc5181
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-01-20" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b52d8f1c3cd9914a0dacef6fefdd2e2be84bb5443445fdef5d22d1bf4167c0fd
[INFO] running `Command { std: "docker" "start" "-a" "b52d8f1c3cd9914a0dacef6fefdd2e2be84bb5443445fdef5d22d1bf4167c0fd", kill_on_drop: false }`
[INFO] [stderr]    Compiling tokio v1.48.0
[INFO] [stderr]    Compiling teewriter v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.67s
[INFO] running `Command { std: "docker" "inspect" "b52d8f1c3cd9914a0dacef6fefdd2e2be84bb5443445fdef5d22d1bf4167c0fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b52d8f1c3cd9914a0dacef6fefdd2e2be84bb5443445fdef5d22d1bf4167c0fd", kill_on_drop: false }`
[INFO] [stdout] b52d8f1c3cd9914a0dacef6fefdd2e2be84bb5443445fdef5d22d1bf4167c0fd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-01-20" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d8f573e8a05aa3baecb12143f0ab3e8346fc8c24ed4ebb72bfd1f4a7335fd374
[INFO] running `Command { std: "docker" "start" "-a" "d8f573e8a05aa3baecb12143f0ab3e8346fc8c24ed4ebb72bfd1f4a7335fd374", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.93
[INFO] [stderr]    Compiling unicode-ident v1.0.16
[INFO] [stderr]    Compiling futures-sink v0.3.31
[INFO] [stderr]    Compiling futures-io v0.3.31
[INFO] [stderr]    Compiling futures-channel v0.3.31
[INFO] [stderr]    Compiling quote v1.0.38
[INFO] [stderr]    Compiling syn v2.0.98
[INFO] [stderr]    Compiling futures-macro v0.3.31
[INFO] [stderr]    Compiling tokio-macros v2.6.0
[INFO] [stderr]    Compiling tokio v1.48.0
[INFO] [stderr]    Compiling futures-util v0.3.31
[INFO] [stderr]    Compiling teewriter v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling futures-executor v0.3.31
[INFO] [stderr]    Compiling futures v0.3.31
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 10.99s
[INFO] running `Command { std: "docker" "inspect" "d8f573e8a05aa3baecb12143f0ab3e8346fc8c24ed4ebb72bfd1f4a7335fd374", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d8f573e8a05aa3baecb12143f0ab3e8346fc8c24ed4ebb72bfd1f4a7335fd374", kill_on_drop: false }`
[INFO] [stdout] d8f573e8a05aa3baecb12143f0ab3e8346fc8c24ed4ebb72bfd1f4a7335fd374
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-01-20" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] f44ec76e06fdbf9c83be552d053172b7139d6c4e12026a16e84a4fd6c3ebf90c
[INFO] running `Command { std: "docker" "start" "-a" "f44ec76e06fdbf9c83be552d053172b7139d6c4e12026a16e84a4fd6c3ebf90c", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/teewriter-c0ef09a4d6f2ead2)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test either::test_either_is_left_right ... ok
[INFO] [stderr]    Doc-tests teewriter
[INFO] [stdout] test tee::tokio_impl::test_poll_uneven ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.03s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test src/lib.rs - (line 41) ... FAILED
[INFO] [stdout] test src/lib.rs - (line 7) ... ok
[INFO] [stdout] test src/tee.rs - tee::TeeWriterExt (line 19) ... ok
[INFO] [stdout] test src/lib.rs - (line 23) ... ok
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - (line 41) stdout ----
[INFO] [stdout] error[E0599]: the method `write_all` exists for struct `TeeWriter<futures::io::Sink, &mut futures::io::Sink>`, but its trait bounds were not satisfied
[INFO] [stdout]   --> src/lib.rs:50:16
[INFO] [stdout]    |
[INFO] [stdout] 50 |   block_on(tee.write_all(b"Hello, futures world!")).unwrap();
[INFO] [stdout]    |                ^^^^^^^^^ method cannot be called due to unsatisfied trait bounds
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/tee.rs:10:1
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct TeeWriter<This, Other> {
[INFO] [stdout]    | --------------------------------- doesn't satisfy `_: AsyncWriteExt` or `_: AsyncWrite`
[INFO] [stdout]    |
[INFO] [stdout]    = note: the following trait bounds were not satisfied:
[INFO] [stdout]            `TeeWriter<futures::io::Sink, &mut futures::io::Sink>: AsyncWrite`
[INFO] [stdout]            which is required by `TeeWriter<futures::io::Sink, &mut futures::io::Sink>: AsyncWriteExt`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs - (line 41)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 3 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.47s
[INFO] [stdout] 
[INFO] [stdout] all doctests ran in 0.75s; merged doctests compilation took 0.27s
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] running `Command { std: "docker" "inspect" "f44ec76e06fdbf9c83be552d053172b7139d6c4e12026a16e84a4fd6c3ebf90c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f44ec76e06fdbf9c83be552d053172b7139d6c4e12026a16e84a4fd6c3ebf90c", kill_on_drop: false }`
[INFO] [stdout] f44ec76e06fdbf9c83be552d053172b7139d6c4e12026a16e84a4fd6c3ebf90c
