[INFO] fetching crate coast 0.0.0... [INFO] testing coast-0.0.0 against beta-2025-09-21 for beta-1.91-3 [INFO] extracting crate coast 0.0.0 into /workspace/builds/worker-0-tc2/source [INFO] started tweaking crates.io crate coast 0.0.0 [INFO] finished tweaking crates.io crate coast 0.0.0 [INFO] tweaked toml for crates.io crate coast 0.0.0 written to /workspace/builds/worker-0-tc2/source/Cargo.toml [INFO] validating manifest of crates.io crate coast 0.0.0 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 16 packages to latest compatible versions [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-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] dbf0e611977dbfe755d1096f604d2da5cff8f91a8dc177a9e147644bd1aa3551 [INFO] running `Command { std: "docker" "start" "-a" "dbf0e611977dbfe755d1096f604d2da5cff8f91a8dc177a9e147644bd1aa3551", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "dbf0e611977dbfe755d1096f604d2da5cff8f91a8dc177a9e147644bd1aa3551", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "dbf0e611977dbfe755d1096f604d2da5cff8f91a8dc177a9e147644bd1aa3551", kill_on_drop: false }` [INFO] [stdout] dbf0e611977dbfe755d1096f604d2da5cff8f91a8dc177a9e147644bd1aa3551 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 8cfdfbcc194e815b25dec2b494ab106047dcdc47a65a9cb42ac5c41569178a31 [INFO] running `Command { std: "docker" "start" "-a" "8cfdfbcc194e815b25dec2b494ab106047dcdc47a65a9cb42ac5c41569178a31", kill_on_drop: false }` [INFO] [stderr] Compiling unicode-ident v1.0.19 [INFO] [stderr] Compiling wasm-bindgen-shared v0.2.104 [INFO] [stderr] Compiling rustversion v1.0.22 [INFO] [stderr] Compiling bumpalo v3.19.0 [INFO] [stderr] Compiling log v0.4.28 [INFO] [stderr] Compiling once_cell v1.21.3 [INFO] [stderr] Compiling proc-macro2 v1.0.101 [INFO] [stderr] Compiling quote v1.0.41 [INFO] [stderr] Compiling wasm-bindgen v0.2.104 [INFO] [stderr] Compiling syn v2.0.106 [INFO] [stderr] Compiling wasm-bindgen-backend v0.2.104 [INFO] [stderr] Compiling wasm-bindgen-macro-support v0.2.104 [INFO] [stderr] Compiling wasm-bindgen-macro v0.2.104 [INFO] [stderr] Compiling js-sys v0.3.81 [INFO] [stderr] Compiling web-sys v0.3.81 [INFO] [stderr] Compiling coast v0.0.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: use of deprecated method `web_sys::AddEventListenerOptions::once`: Use `set_once()` instead. [INFO] [stdout] --> src/events.rs:80:17 [INFO] [stdout] | [INFO] [stdout] 80 | options.once(false); [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(deprecated)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated method `web_sys::AddEventListenerOptions::passive`: Use `set_passive()` instead. [INFO] [stdout] --> src/events.rs:81:17 [INFO] [stdout] | [INFO] [stdout] 81 | options.passive(self.passive); [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated method `web_sys::AddEventListenerOptions::capture`: Use `set_capture()` instead. [INFO] [stdout] --> src/events.rs:82:17 [INFO] [stdout] | [INFO] [stdout] 82 | options.capture(self.phase.is_capture()); [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated method `web_sys::AddEventListenerOptions::once`: Use `set_once()` instead. [INFO] [stdout] --> src/events.rs:111:17 [INFO] [stdout] | [INFO] [stdout] 111 | options.once(false); [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated method `web_sys::AddEventListenerOptions::passive`: Use `set_passive()` instead. [INFO] [stdout] --> src/events.rs:112:17 [INFO] [stdout] | [INFO] [stdout] 112 | options.passive(true); [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated method `web_sys::AddEventListenerOptions::once`: Use `set_once()` instead. [INFO] [stdout] --> src/events.rs:163:17 [INFO] [stdout] | [INFO] [stdout] 163 | options.once(false); [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated method `web_sys::AddEventListenerOptions::passive`: Use `set_passive()` instead. [INFO] [stdout] --> src/events.rs:164:17 [INFO] [stdout] | [INFO] [stdout] 164 | options.passive(true); [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 16.49s [INFO] running `Command { std: "docker" "inspect" "8cfdfbcc194e815b25dec2b494ab106047dcdc47a65a9cb42ac5c41569178a31", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "8cfdfbcc194e815b25dec2b494ab106047dcdc47a65a9cb42ac5c41569178a31", kill_on_drop: false }` [INFO] [stdout] 8cfdfbcc194e815b25dec2b494ab106047dcdc47a65a9cb42ac5c41569178a31 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 22201247e94c1f5c1cd2604fb3f75608ac6a88581de5706cdbbaea149c16b44e [INFO] running `Command { std: "docker" "start" "-a" "22201247e94c1f5c1cd2604fb3f75608ac6a88581de5706cdbbaea149c16b44e", kill_on_drop: false }` [INFO] [stdout] warning: use of deprecated method `web_sys::AddEventListenerOptions::once`: Use `set_once()` instead. [INFO] [stdout] --> src/events.rs:80:17 [INFO] [stdout] | [INFO] [stdout] 80 | options.once(false); [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(deprecated)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated method `web_sys::AddEventListenerOptions::passive`: Use `set_passive()` instead. [INFO] [stdout] --> src/events.rs:81:17 [INFO] [stdout] | [INFO] [stdout] 81 | options.passive(self.passive); [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated method `web_sys::AddEventListenerOptions::capture`: Use `set_capture()` instead. [INFO] [stdout] --> src/events.rs:82:17 [INFO] [stdout] | [INFO] [stdout] 82 | options.capture(self.phase.is_capture()); [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated method `web_sys::AddEventListenerOptions::once`: Use `set_once()` instead. [INFO] [stdout] --> src/events.rs:111:17 [INFO] [stdout] | [INFO] [stdout] 111 | options.once(false); [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated method `web_sys::AddEventListenerOptions::passive`: Use `set_passive()` instead. [INFO] [stdout] --> src/events.rs:112:17 [INFO] [stdout] | [INFO] [stdout] 112 | options.passive(true); [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Compiling coast v0.0.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: use of deprecated method `web_sys::AddEventListenerOptions::once`: Use `set_once()` instead. [INFO] [stdout] --> src/events.rs:163:17 [INFO] [stdout] | [INFO] [stdout] 163 | options.once(false); [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated method `web_sys::AddEventListenerOptions::passive`: Use `set_passive()` instead. [INFO] [stdout] --> src/events.rs:164:17 [INFO] [stdout] | [INFO] [stdout] 164 | options.passive(true); [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated method `web_sys::AddEventListenerOptions::once`: Use `set_once()` instead. [INFO] [stdout] --> src/events.rs:80:17 [INFO] [stdout] | [INFO] [stdout] 80 | options.once(false); [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(deprecated)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated method `web_sys::AddEventListenerOptions::passive`: Use `set_passive()` instead. [INFO] [stdout] --> src/events.rs:81:17 [INFO] [stdout] | [INFO] [stdout] 81 | options.passive(self.passive); [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated method `web_sys::AddEventListenerOptions::capture`: Use `set_capture()` instead. [INFO] [stdout] --> src/events.rs:82:17 [INFO] [stdout] | [INFO] [stdout] 82 | options.capture(self.phase.is_capture()); [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated method `web_sys::AddEventListenerOptions::once`: Use `set_once()` instead. [INFO] [stdout] --> src/events.rs:111:17 [INFO] [stdout] | [INFO] [stdout] 111 | options.once(false); [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated method `web_sys::AddEventListenerOptions::passive`: Use `set_passive()` instead. [INFO] [stdout] --> src/events.rs:112:17 [INFO] [stdout] | [INFO] [stdout] 112 | options.passive(true); [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated method `web_sys::AddEventListenerOptions::once`: Use `set_once()` instead. [INFO] [stdout] --> src/events.rs:163:17 [INFO] [stdout] | [INFO] [stdout] 163 | options.once(false); [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated method `web_sys::AddEventListenerOptions::passive`: Use `set_passive()` instead. [INFO] [stdout] --> src/events.rs:164:17 [INFO] [stdout] | [INFO] [stdout] 164 | options.passive(true); [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 0.54s [INFO] running `Command { std: "docker" "inspect" "22201247e94c1f5c1cd2604fb3f75608ac6a88581de5706cdbbaea149c16b44e", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "22201247e94c1f5c1cd2604fb3f75608ac6a88581de5706cdbbaea149c16b44e", kill_on_drop: false }` [INFO] [stdout] 22201247e94c1f5c1cd2604fb3f75608ac6a88581de5706cdbbaea149c16b44e [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] acf76c58c6172662f471626137e6273563b09443cc4a2b79322d96e1eed7a8b8 [INFO] running `Command { std: "docker" "start" "-a" "acf76c58c6172662f471626137e6273563b09443cc4a2b79322d96e1eed7a8b8", kill_on_drop: false }` [INFO] [stderr] warning: use of deprecated method `web_sys::AddEventListenerOptions::once`: Use `set_once()` instead. [INFO] [stderr] --> src/events.rs:80:17 [INFO] [stderr] | [INFO] [stderr] 80 | options.once(false); [INFO] [stderr] | ^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(deprecated)]` on by default [INFO] [stderr] [INFO] [stderr] warning: use of deprecated method `web_sys::AddEventListenerOptions::passive`: Use `set_passive()` instead. [INFO] [stderr] --> src/events.rs:81:17 [INFO] [stderr] | [INFO] [stderr] 81 | options.passive(self.passive); [INFO] [stderr] | ^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: use of deprecated method `web_sys::AddEventListenerOptions::capture`: Use `set_capture()` instead. [INFO] [stderr] --> src/events.rs:82:17 [INFO] [stderr] | [INFO] [stderr] 82 | options.capture(self.phase.is_capture()); [INFO] [stderr] | ^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: use of deprecated method `web_sys::AddEventListenerOptions::once`: Use `set_once()` instead. [INFO] [stderr] --> src/events.rs:111:17 [INFO] [stderr] | [INFO] [stderr] 111 | options.once(false); [INFO] [stderr] | ^^^^ [INFO] [stderr] [INFO] [stderr] warning: use of deprecated method `web_sys::AddEventListenerOptions::passive`: Use `set_passive()` instead. [INFO] [stderr] --> src/events.rs:112:17 [INFO] [stderr] | [INFO] [stderr] 112 | options.passive(true); [INFO] [stderr] | ^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: use of deprecated method `web_sys::AddEventListenerOptions::once`: Use `set_once()` instead. [INFO] [stderr] --> src/events.rs:163:17 [INFO] [stderr] | [INFO] [stderr] 163 | options.once(false); [INFO] [stderr] | ^^^^ [INFO] [stderr] [INFO] [stderr] warning: use of deprecated method `web_sys::AddEventListenerOptions::passive`: Use `set_passive()` instead. [INFO] [stderr] --> src/events.rs:164:17 [INFO] [stderr] | [INFO] [stderr] 164 | options.passive(true); [INFO] [stderr] | ^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: `coast` (lib) generated 7 warnings [INFO] [stderr] warning: `coast` (lib test) generated 7 warnings (7 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/coast-e840740862f806a5) [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] Running tests/test.rs (/opt/rustwide/target/debug/deps/test-515d864291818ec6) [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 coast [INFO] [stderr] warning: lint `missing_doc_code_examples` has been renamed to `rustdoc::missing_doc_code_examples` [INFO] [stderr] --> src/lib.rs:11:23 [INFO] [stderr] | [INFO] [stderr] 11 | #![warn(missing_docs, missing_doc_code_examples, unreachable_pub)] [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^ help: use the new name: `rustdoc::missing_doc_code_examples` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(renamed_and_removed_lints)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unknown lint: `rustdoc::missing_doc_code_examples` [INFO] [stderr] --> src/lib.rs:11:23 [INFO] [stderr] | [INFO] [stderr] 11 | #![warn(missing_docs, missing_doc_code_examples, unreachable_pub)] [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: the `rustdoc::missing_doc_code_examples` lint is unstable [INFO] [stderr] = note: see issue #101730 for more information [INFO] [stderr] = note: `#[warn(unknown_lints)]` on by default [INFO] [stderr] [INFO] [stderr] warning: 2 warnings emitted [INFO] [stderr] [INFO] [stdout] [INFO] [stdout] running 1 test [INFO] [stdout] test src/lib.rs - (line 5) ... ok [INFO] [stdout] [INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.27s [INFO] [stdout] [INFO] running `Command { std: "docker" "inspect" "acf76c58c6172662f471626137e6273563b09443cc4a2b79322d96e1eed7a8b8", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "acf76c58c6172662f471626137e6273563b09443cc4a2b79322d96e1eed7a8b8", kill_on_drop: false }` [INFO] [stdout] acf76c58c6172662f471626137e6273563b09443cc4a2b79322d96e1eed7a8b8