[INFO] fetching crate futures-signals-structs-derive 0.2.0...
[INFO] testing futures-signals-structs-derive-0.2.0 against beta-2026-03-05 for beta-1.95-1
[INFO] extracting crate futures-signals-structs-derive 0.2.0 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate futures-signals-structs-derive 0.2.0
[INFO] finished tweaking crates.io crate futures-signals-structs-derive 0.2.0
[INFO] tweaked toml for crates.io crate futures-signals-structs-derive 0.2.0 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate futures-signals-structs-derive 0.2.0 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 4 packages to latest compatible versions
[INFO] [stderr]       Adding syn v1.0.109 (available: v2.0.117)
[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] 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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-03-05" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4447f44292a6fb804ca140411abf394d2e144919f228ce3a3660533b2a930f34
[INFO] running `Command { std: "docker" "start" "-a" "4447f44292a6fb804ca140411abf394d2e144919f228ce3a3660533b2a930f34", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4447f44292a6fb804ca140411abf394d2e144919f228ce3a3660533b2a930f34", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4447f44292a6fb804ca140411abf394d2e144919f228ce3a3660533b2a930f34", kill_on_drop: false }`
[INFO] [stdout] 4447f44292a6fb804ca140411abf394d2e144919f228ce3a3660533b2a930f34
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-03-05" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 13854b6af01ecf841b4aaec2d89562fccb18d997e60e460705083b021e4dc499
[INFO] running `Command { std: "docker" "start" "-a" "13854b6af01ecf841b4aaec2d89562fccb18d997e60e460705083b021e4dc499", kill_on_drop: false }`
[INFO] [stderr]    Compiling futures-signals-structs-derive v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.35s
[INFO] running `Command { std: "docker" "inspect" "13854b6af01ecf841b4aaec2d89562fccb18d997e60e460705083b021e4dc499", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "13854b6af01ecf841b4aaec2d89562fccb18d997e60e460705083b021e4dc499", kill_on_drop: false }`
[INFO] [stdout] 13854b6af01ecf841b4aaec2d89562fccb18d997e60e460705083b021e4dc499
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-03-05" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c74d357d231609aa2ed05aff6ae99012262c491a48f7a9832691b22b3d525ba3
[INFO] running `Command { std: "docker" "start" "-a" "c74d357d231609aa2ed05aff6ae99012262c491a48f7a9832691b22b3d525ba3", kill_on_drop: false }`
[INFO] [stderr]    Compiling futures-signals-structs-derive v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.24s
[INFO] running `Command { std: "docker" "inspect" "c74d357d231609aa2ed05aff6ae99012262c491a48f7a9832691b22b3d525ba3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c74d357d231609aa2ed05aff6ae99012262c491a48f7a9832691b22b3d525ba3", kill_on_drop: false }`
[INFO] [stdout] c74d357d231609aa2ed05aff6ae99012262c491a48f7a9832691b22b3d525ba3
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-03-05" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] bd5f4052a5b41dfcf61e36f4ecafa4c10bdf3230b6141804f3f5ddcca7a1ed0b
[INFO] running `Command { std: "docker" "start" "-a" "bd5f4052a5b41dfcf61e36f4ecafa4c10bdf3230b6141804f3f5ddcca7a1ed0b", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/futures_signals_structs_derive-b059eb6caa72a589)
[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] [stderr]    Doc-tests futures_signals_structs_derive
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test src/lib.rs - as_mutable_struct (line 136) ... FAILED
[INFO] [stdout] test src/lib.rs - as_mutable_struct (line 143) ... FAILED
[INFO] [stdout] test src/lib.rs - as_mutable_struct (line 154) ... FAILED
[INFO] [stdout] test src/lib.rs - as_mutable_struct (line 128) ... FAILED
[INFO] [stdout] test src/lib.rs - as_mutable_struct (line 109) ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - as_mutable_struct (line 136) stdout ----
[INFO] [stdout] error[E0425]: cannot find value `mutable_score` in this scope
[INFO] [stdout]    --> src/lib.rs:137:12
[INFO] [stdout]     |
[INFO] [stdout] 137 | assert_eq!(mutable_score.snapshot(), PlayerScore {
[INFO] [stdout]     |            ^^^^^^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error[E0422]: cannot find struct, variant or union type `PlayerScore` in this scope
[INFO] [stdout]    --> src/lib.rs:137:38
[INFO] [stdout]     |
[INFO] [stdout] 137 | assert_eq!(mutable_score.snapshot(), PlayerScore {
[INFO] [stdout]     |                                      ^^^^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0422, E0425.
[INFO] [stdout] For more information about an error, try `rustc --explain E0422`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - as_mutable_struct (line 143) stdout ----
[INFO] [stdout] error[E0425]: cannot find value `mutable_score` in this scope
[INFO] [stdout]    --> src/lib.rs:144:1
[INFO] [stdout]     |
[INFO] [stdout] 144 | mutable_score.update(PlayerScore {
[INFO] [stdout]     | ^^^^^^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error[E0422]: cannot find struct, variant or union type `PlayerScore` in this scope
[INFO] [stdout]    --> src/lib.rs:144:22
[INFO] [stdout]     |
[INFO] [stdout] 144 | mutable_score.update(PlayerScore {
[INFO] [stdout]     |                      ^^^^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `mutable_score` in this scope
[INFO] [stdout]    --> src/lib.rs:148:16
[INFO] [stdout]     |
[INFO] [stdout] 148 |     assert_eq!(mutable_score.snapshot(), PlayerScore {
[INFO] [stdout]     |                ^^^^^^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error[E0422]: cannot find struct, variant or union type `PlayerScore` in this scope
[INFO] [stdout]    --> src/lib.rs:148:42
[INFO] [stdout]     |
[INFO] [stdout] 148 |     assert_eq!(mutable_score.snapshot(), PlayerScore {
[INFO] [stdout]     |                                          ^^^^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0422, E0425.
[INFO] [stdout] For more information about an error, try `rustc --explain E0422`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - as_mutable_struct (line 154) stdout ----
[INFO] [stdout] error: cannot find derive macro `AsMutableStruct` in this scope
[INFO] [stdout]    --> src/lib.rs:155:10
[INFO] [stdout]     |
[INFO] [stdout] 155 | #[derive(AsMutableStruct)]
[INFO] [stdout]     |          ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `mutable_type` in this scope
[INFO] [stdout]    --> src/lib.rs:157:11
[INFO] [stdout]     |
[INFO] [stdout] 157 |         #[mutable_type = "MutablePlayerScore"] player_1: PlayerScore,
[INFO] [stdout]     |           ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `mutable_type` in this scope
[INFO] [stdout]    --> src/lib.rs:158:11
[INFO] [stdout]     |
[INFO] [stdout] 158 |         #[mutable_type = "MutablePlayerScore"] player_2: PlayerScore,
[INFO] [stdout]     |           ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find type `PlayerScore` in this scope
[INFO] [stdout]    --> src/lib.rs:157:58
[INFO] [stdout]     |
[INFO] [stdout] 157 |         #[mutable_type = "MutablePlayerScore"] player_1: PlayerScore,
[INFO] [stdout]     |                                                          ^^^^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find type `PlayerScore` in this scope
[INFO] [stdout]    --> src/lib.rs:158:58
[INFO] [stdout]     |
[INFO] [stdout] 158 |         #[mutable_type = "MutablePlayerScore"] player_2: PlayerScore,
[INFO] [stdout]     |                                                          ^^^^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 5 previous errors
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0425`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - as_mutable_struct (line 128) stdout ----
[INFO] [stdout] error[E0422]: cannot find struct, variant or union type `MutablePlayerScore` in this scope
[INFO] [stdout]    --> src/lib.rs:129:21
[INFO] [stdout]     |
[INFO] [stdout] 129 | let mutable_score = MutablePlayerScore {
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: cannot find type `Mutable` in this scope
[INFO] [stdout]    --> src/lib.rs:130:15
[INFO] [stdout]     |
[INFO] [stdout] 130 |         hits: Mutable::new(5),
[INFO] [stdout]     |               ^^^^^^^ use of undeclared type `Mutable`
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: cannot find type `Mutable` in this scope
[INFO] [stdout]    --> src/lib.rs:131:21
[INFO] [stdout]     |
[INFO] [stdout] 131 |         multiplier: Mutable::new(1.4),
[INFO] [stdout]     |                     ^^^^^^^ use of undeclared type `Mutable`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0422, E0433.
[INFO] [stdout] For more information about an error, try `rustc --explain E0422`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - as_mutable_struct (line 109) stdout ----
[INFO] [stdout] error: cannot find derive macro `AsMutableStruct` in this scope
[INFO] [stdout]    --> src/lib.rs:110:10
[INFO] [stdout]     |
[INFO] [stdout] 110 | #[derive(AsMutableStruct)]
[INFO] [stdout]     |          ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `as_mutable_struct` found for struct `PlayerScore` in the current scope
[INFO] [stdout]    --> src/lib.rs:121:35
[INFO] [stdout]     |
[INFO] [stdout] 111 |     struct PlayerScore {
[INFO] [stdout]     |     ------------------ method `as_mutable_struct` not found for this struct
[INFO] [stdout] ...
[INFO] [stdout] 121 |         let mutable_score = score.as_mutable_struct();
[INFO] [stdout]     |                                   ^^^^^^^^^^^^^^^^^ method not found in `PlayerScore`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[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 - as_mutable_struct (line 109)
[INFO] [stdout]     src/lib.rs - as_mutable_struct (line 128)
[INFO] [stdout]     src/lib.rs - as_mutable_struct (line 136)
[INFO] [stdout]     src/lib.rs - as_mutable_struct (line 143)
[INFO] [stdout]     src/lib.rs - as_mutable_struct (line 154)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 5 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.09s
[INFO] [stdout] 
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] running `Command { std: "docker" "inspect" "bd5f4052a5b41dfcf61e36f4ecafa4c10bdf3230b6141804f3f5ddcca7a1ed0b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bd5f4052a5b41dfcf61e36f4ecafa4c10bdf3230b6141804f3f5ddcca7a1ed0b", kill_on_drop: false }`
[INFO] [stdout] bd5f4052a5b41dfcf61e36f4ecafa4c10bdf3230b6141804f3f5ddcca7a1ed0b
