[INFO] fetching crate observables 0.1.0...
[INFO] testing observables-0.1.0 against beta-2025-10-28 for beta-1.92-2
[INFO] extracting crate observables 0.1.0 into /workspace/builds/worker-1-tc2/source
[INFO] started tweaking crates.io crate observables 0.1.0
[INFO] finished tweaking crates.io crate observables 0.1.0
[INFO] tweaked toml for crates.io crate observables 0.1.0 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate observables 0.1.0 on toolchain beta-2025-10-28
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-10-28" "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-2025-10-28" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 41 packages to latest compatible versions
[INFO] [stderr]       Adding async-channel v1.9.0 (available: v2.5.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-10-28" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b3b046cebbb9facdcd4c01b524d82badcac9ab72dcd77ed97b40acdff20cd7ce
[INFO] running `Command { std: "docker" "start" "-a" "b3b046cebbb9facdcd4c01b524d82badcac9ab72dcd77ed97b40acdff20cd7ce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b3b046cebbb9facdcd4c01b524d82badcac9ab72dcd77ed97b40acdff20cd7ce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b3b046cebbb9facdcd4c01b524d82badcac9ab72dcd77ed97b40acdff20cd7ce", kill_on_drop: false }`
[INFO] [stdout] b3b046cebbb9facdcd4c01b524d82badcac9ab72dcd77ed97b40acdff20cd7ce
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1b3378d0a7c9d2c6efb100ceb31fcf2cbf508d55cc78dd9bbc3a62b46323e700
[INFO] running `Command { std: "docker" "start" "-a" "1b3378d0a7c9d2c6efb100ceb31fcf2cbf508d55cc78dd9bbc3a62b46323e700", kill_on_drop: false }`
[INFO] [stderr]    Compiling cfg-if v1.0.4
[INFO] [stderr]    Compiling crossbeam-utils v0.8.21
[INFO] [stderr]    Compiling event-listener v2.5.3
[INFO] [stderr]    Compiling getrandom v0.3.4
[INFO] [stderr]    Compiling discard v1.0.4
[INFO] [stderr]    Compiling waker-fn v1.2.0
[INFO] [stderr]    Compiling syn v2.0.108
[INFO] [stderr]    Compiling uuid v1.18.1
[INFO] [stderr]    Compiling concurrent-queue v2.5.0
[INFO] [stderr]    Compiling async-channel v1.9.0
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling futures-macro v0.3.31
[INFO] [stderr]    Compiling pin-project-internal v1.1.10
[INFO] [stderr]    Compiling gensym v0.1.1
[INFO] [stderr]    Compiling pin-project v1.1.10
[INFO] [stderr]    Compiling futures-util v0.3.31
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling futures-signals v0.3.34
[INFO] [stderr]    Compiling observables v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `NoChange` is never constructed
[INFO] [stdout]  --> src/impls/mod.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct NoChange<T>(pub T);
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.deref()` on a double reference, which returns `&T` instead of dereferencing the inner type
[INFO] [stdout]   --> src/lib.rs:41:45
[INFO] [stdout]    |
[INFO] [stdout] 41 |             ObservableBorrow::Borrow(x) => x.deref(),
[INFO] [stdout]    |                                             ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(suspicious_double_ref_op)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 12.20s
[INFO] running `Command { std: "docker" "inspect" "1b3378d0a7c9d2c6efb100ceb31fcf2cbf508d55cc78dd9bbc3a62b46323e700", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1b3378d0a7c9d2c6efb100ceb31fcf2cbf508d55cc78dd9bbc3a62b46323e700", kill_on_drop: false }`
[INFO] [stdout] 1b3378d0a7c9d2c6efb100ceb31fcf2cbf508d55cc78dd9bbc3a62b46323e700
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1b40102f7963de5e17250503267bfdc7b4646143b488d5bf749bc79a25cf7bbe
[INFO] running `Command { std: "docker" "start" "-a" "1b40102f7963de5e17250503267bfdc7b4646143b488d5bf749bc79a25cf7bbe", kill_on_drop: false }`
[INFO] [stderr]    Compiling observables v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `NoChange` is never constructed
[INFO] [stdout]  --> src/impls/mod.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct NoChange<T>(pub T);
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.deref()` on a double reference, which returns `&T` instead of dereferencing the inner type
[INFO] [stdout]   --> src/lib.rs:41:45
[INFO] [stdout]    |
[INFO] [stdout] 41 |             ObservableBorrow::Borrow(x) => x.deref(),
[INFO] [stdout]    |                                             ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(suspicious_double_ref_op)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `NoChange` is never constructed
[INFO] [stdout]  --> src/impls/mod.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct NoChange<T>(pub T);
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.deref()` on a double reference, which returns `&T` instead of dereferencing the inner type
[INFO] [stdout]   --> src/lib.rs:41:45
[INFO] [stdout]    |
[INFO] [stdout] 41 |             ObservableBorrow::Borrow(x) => x.deref(),
[INFO] [stdout]    |                                             ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(suspicious_double_ref_op)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.09s
[INFO] running `Command { std: "docker" "inspect" "1b40102f7963de5e17250503267bfdc7b4646143b488d5bf749bc79a25cf7bbe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1b40102f7963de5e17250503267bfdc7b4646143b488d5bf749bc79a25cf7bbe", kill_on_drop: false }`
[INFO] [stdout] 1b40102f7963de5e17250503267bfdc7b4646143b488d5bf749bc79a25cf7bbe
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 67b13e98ca2d01277701ca8adbd0b8daf8733b3dd7729d4adbb8d0328328435b
[INFO] running `Command { std: "docker" "start" "-a" "67b13e98ca2d01277701ca8adbd0b8daf8733b3dd7729d4adbb8d0328328435b", kill_on_drop: false }`
[INFO] [stderr] warning: struct `NoChange` is never constructed
[INFO] [stderr]  --> src/impls/mod.rs:4:12
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub struct NoChange<T>(pub T);
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: using `.deref()` on a double reference, which returns `&T` instead of dereferencing the inner type
[INFO] [stderr]   --> src/lib.rs:41:45
[INFO] [stderr]    |
[INFO] [stderr] 41 |             ObservableBorrow::Borrow(x) => x.deref(),
[INFO] [stderr]    |                                             ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(suspicious_double_ref_op)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `observables` (lib) generated 2 warnings
[INFO] [stderr] warning: `observables` (lib test) generated 2 warnings (2 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.09s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/observables-6102717cd51d20f4)
[INFO] [stderr]    Doc-tests observables
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "67b13e98ca2d01277701ca8adbd0b8daf8733b3dd7729d4adbb8d0328328435b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "67b13e98ca2d01277701ca8adbd0b8daf8733b3dd7729d4adbb8d0328328435b", kill_on_drop: false }`
[INFO] [stdout] 67b13e98ca2d01277701ca8adbd0b8daf8733b3dd7729d4adbb8d0328328435b