[INFO] fetching crate stream-combinators 0.1.0...
[INFO] testing stream-combinators-0.1.0 against beta-2026-03-05 for beta-1.95-1
[INFO] extracting crate stream-combinators 0.1.0 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate stream-combinators 0.1.0
[INFO] finished tweaking crates.io crate stream-combinators 0.1.0
[INFO] tweaked toml for crates.io crate stream-combinators 0.1.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate stream-combinators 0.1.0 on toolchain beta-2026-03-05
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-03-05" "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-2026-03-05" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 61 packages to latest compatible versions
[INFO] [stderr]       Adding futures v0.1.31 (available: v0.3.32)
[INFO] [stderr]       Adding tokio-timer v0.1.2 (available: v0.2.13)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-03-05" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-03-05" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b711e401b69783d459df7977f3a0b5f31b1dba5af349c43218c612fe9964a3fd
[INFO] running `Command { std: "docker" "start" "-a" "b711e401b69783d459df7977f3a0b5f31b1dba5af349c43218c612fe9964a3fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b711e401b69783d459df7977f3a0b5f31b1dba5af349c43218c612fe9964a3fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b711e401b69783d459df7977f3a0b5f31b1dba5af349c43218c612fe9964a3fd", kill_on_drop: false }`
[INFO] [stdout] b711e401b69783d459df7977f3a0b5f31b1dba5af349c43218c612fe9964a3fd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-03-05" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3f881042a2a1f5fb4b40ee9809d4c170599591b4a6daed0d1ca038e52d65b146
[INFO] running `Command { std: "docker" "start" "-a" "3f881042a2a1f5fb4b40ee9809d4c170599591b4a6daed0d1ca038e52d65b146", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]    Compiling stream-combinators v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.22s
[INFO] running `Command { std: "docker" "inspect" "3f881042a2a1f5fb4b40ee9809d4c170599591b4a6daed0d1ca038e52d65b146", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3f881042a2a1f5fb4b40ee9809d4c170599591b4a6daed0d1ca038e52d65b146", kill_on_drop: false }`
[INFO] [stdout] 3f881042a2a1f5fb4b40ee9809d4c170599591b4a6daed0d1ca038e52d65b146
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-03-05" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 020e7bd99d01d6012678580b9de61b5850271320b516a3ef64f25c414f608699
[INFO] running `Command { std: "docker" "start" "-a" "020e7bd99d01d6012678580b9de61b5850271320b516a3ef64f25c414f608699", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]    Compiling bytes v0.4.12
[INFO] [stderr]    Compiling scoped-tls v0.1.2
[INFO] [stderr]    Compiling slab v0.3.0
[INFO] [stderr]    Compiling tokio-stdin v0.1.2
[INFO] [stderr]    Compiling mio v0.6.23
[INFO] [stderr]    Compiling tokio-threadpool v0.1.18
[INFO] [stderr]    Compiling tokio-timer v0.1.2
[INFO] [stderr]    Compiling tokio-io v0.1.13
[INFO] [stderr]    Compiling mio-uds v0.6.8
[INFO] [stderr]    Compiling tokio-reactor v0.1.12
[INFO] [stderr]    Compiling tokio-codec v0.1.2
[INFO] [stderr]    Compiling tokio-fs v0.1.7
[INFO] [stderr]    Compiling tokio-tcp v0.1.4
[INFO] [stderr]    Compiling tokio-udp v0.1.6
[INFO] [stderr]    Compiling tokio-uds v0.2.7
[INFO] [stderr]    Compiling tokio v0.1.22
[INFO] [stderr]    Compiling tokio-core v0.1.18
[INFO] [stderr]    Compiling stream-combinators v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]  --> examples/into_pairs.rs:9:41
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let number_stream = iter_ok::<_,()>((0..6));
[INFO] [stdout]   |                                         ^    ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]   |
[INFO] [stdout] 9 -     let number_stream = iter_ok::<_,()>((0..6));
[INFO] [stdout] 9 +     let number_stream = iter_ok::<_,()>(0..6 );
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 5.27s
[INFO] running `Command { std: "docker" "inspect" "020e7bd99d01d6012678580b9de61b5850271320b516a3ef64f25c414f608699", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "020e7bd99d01d6012678580b9de61b5850271320b516a3ef64f25c414f608699", kill_on_drop: false }`
[INFO] [stdout] 020e7bd99d01d6012678580b9de61b5850271320b516a3ef64f25c414f608699
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-03-05" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 5bf4c4d9a5b0b8aa6cd42dc8b341f6a281432c1edfdddd9841861f8568f8552d
[INFO] running `Command { std: "docker" "start" "-a" "5bf4c4d9a5b0b8aa6cd42dc8b341f6a281432c1edfdddd9841861f8568f8552d", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stdout] 
[INFO] [stderr]  --> examples/into_pairs.rs:9:41
[INFO] [stdout] running 0 tests
[INFO] [stderr]   |
[INFO] [stdout] 
[INFO] [stderr] 9 |     let number_stream = iter_ok::<_,()>((0..6));
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr]   |                                         ^    ^
[INFO] [stdout] 
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]   |
[INFO] [stderr] 9 -     let number_stream = iter_ok::<_,()>((0..6));
[INFO] [stderr] 9 +     let number_stream = iter_ok::<_,()>(0..6 );
[INFO] [stderr]   |
[INFO] [stderr] 
[INFO] [stderr] warning: `stream-combinators` (example "into_pairs") generated 1 warning (run `cargo fix --example "into_pairs" -p stream-combinators` to apply 1 suggestion)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/stream_combinators-21277c2a54c5052f)
[INFO] [stderr]    Doc-tests stream_combinators
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/filter_fold.rs - filter_fold::FilterFold (line 21) ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/filter_fold.rs - filter_fold::FilterFold (line 21) stdout ----
[INFO] [stdout] error[E0433]: cannot find module or crate `futures` in the crate root
[INFO] [stdout]   --> src/filter_fold.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 | use futures::stream::{iter_ok, Stream};
[INFO] [stdout]    |     ^^^^^^^ use of unresolved module or unlinked crate `futures`
[INFO] [stdout]    |
[INFO] [stdout] help: if you wanted to use a crate named `futures`, use `cargo add futures` to add it to your `Cargo.toml` and import it in your code
[INFO] [stdout]    |
[INFO] [stdout] 20 + extern crate futures;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `futures`
[INFO] [stdout]   --> src/filter_fold.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 | use futures::Future;
[INFO] [stdout]    |     ^^^^^^^ use of unresolved module or unlinked crate `futures`
[INFO] [stdout]    |
[INFO] [stdout] help: if you wanted to use a crate named `futures`, use `cargo add futures` to add it to your `Cargo.toml` and import it in your code
[INFO] [stdout]    |
[INFO] [stdout] 20 + extern crate futures;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0432, E0433.
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/filter_fold.rs - filter_fold::FilterFold (line 21)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.11s
[INFO] [stdout] 
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] running `Command { std: "docker" "inspect" "5bf4c4d9a5b0b8aa6cd42dc8b341f6a281432c1edfdddd9841861f8568f8552d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5bf4c4d9a5b0b8aa6cd42dc8b341f6a281432c1edfdddd9841861f8568f8552d", kill_on_drop: false }`
[INFO] [stdout] 5bf4c4d9a5b0b8aa6cd42dc8b341f6a281432c1edfdddd9841861f8568f8552d
