[INFO] cloning repository https://github.com/enheit/language-learner [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/enheit/language-learner" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fenheit%2Flanguage-learner", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fenheit%2Flanguage-learner'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 5f377edae4f72067bd377353716ef1294518d2fd [INFO] checking enheit/language-learner against a5689b034ad287112f709693384a37f1377eb9cc for pr-129249-3 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fenheit%2Flanguage-learner" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'... [INFO] [stderr] done. [INFO] started tweaking git repo https://github.com/enheit/language-learner [INFO] finished tweaking git repo https://github.com/enheit/language-learner [INFO] tweaked toml for git repo https://github.com/enheit/language-learner written to /workspace/builds/worker-1-tc2/source/Cargo.toml [INFO] validating manifest of git repo https://github.com/enheit/language-learner on toolchain a5689b034ad287112f709693384a37f1377eb9cc [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a5689b034ad287112f709693384a37f1377eb9cc" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate git repo https://github.com/enheit/language-learner 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" "+a5689b034ad287112f709693384a37f1377eb9cc" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] warning: unused field `repository` in `workspace.package` [INFO] [stderr] --> Cargo.toml:34:1 [INFO] [stderr] | [INFO] [stderr] 34 | repository = "https://github.com/enepomnyaschih/language-learner" [INFO] [stderr] | ^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `cargo::unused_workspace_package_fields` is set to `warn` by default [INFO] [stderr] help: consider removing the field `workspace.package.repository` [INFO] [stderr] warning: workspace (manifest) generated 1 warning [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:77db811e55d90add9212f6832c23229e3de5f1c1f9905e8cb07319ea15df73ac" "sleep" "infinity", kill_on_drop: false }` [INFO] [stdout] f5d5ef3006254c8b767a483b33a7a3a41be7282ea1673baff0e08c11048a80b9 [INFO] running `Command { std: "docker" "start" "f5d5ef3006254c8b767a483b33a7a3a41be7282ea1673baff0e08c11048a80b9", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "f5d5ef3006254c8b767a483b33a7a3a41be7282ea1673baff0e08c11048a80b9", kill_on_drop: false }` [INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "f5d5ef3006254c8b767a483b33a7a3a41be7282ea1673baff0e08c11048a80b9" "/opt/rustwide/cargo-home/bin/cargo" "+a5689b034ad287112f709693384a37f1377eb9cc" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "f5d5ef3006254c8b767a483b33a7a3a41be7282ea1673baff0e08c11048a80b9", kill_on_drop: false }` [INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-w" "/opt/rustwide/workdir" "--user" "0:0" "f5d5ef3006254c8b767a483b33a7a3a41be7282ea1673baff0e08c11048a80b9" "/opt/rustwide/cargo-home/bin/cargo" "+a5689b034ad287112f709693384a37f1377eb9cc" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stderr] warning: unused field `repository` in `workspace.package` [INFO] [stderr] --> Cargo.toml:34:1 [INFO] [stderr] | [INFO] [stderr] 34 | repository = "https://github.com/enepomnyaschih/language-learner" [INFO] [stderr] | ^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `cargo::unused_workspace_package_fields` is set to `warn` by default [INFO] [stderr] help: consider removing the field `workspace.package.repository` [INFO] [stderr] warning: workspace (manifest) generated 1 warning [INFO] [stderr] Compiling quote v1.0.46 [INFO] [stderr] Compiling stable_deref_trait v1.2.1 [INFO] [stderr] Compiling writeable v0.6.3 [INFO] [stderr] Compiling litemap v0.8.2 [INFO] [stderr] Compiling cc v1.2.66 [INFO] [stderr] Checking smallvec v1.15.2 [INFO] [stderr] Compiling zeroize v1.9.0 [INFO] [stderr] Checking bitflags v2.13.0 [INFO] [stderr] Compiling rustls v0.23.41 [INFO] [stderr] Compiling libc v0.2.186 [INFO] [stderr] Compiling icu_normalizer_data v2.2.0 [INFO] [stderr] Compiling icu_properties_data v2.2.0 [INFO] [stderr] Compiling rustix v1.1.4 [INFO] [stderr] Compiling serde_json v1.0.150 [INFO] [stderr] Compiling adler2 v2.0.1 [INFO] [stderr] Compiling percent-encoding v2.3.2 [INFO] [stderr] Compiling simd-adler32 v0.3.9 [INFO] [stderr] Compiling crc32fast v1.5.0 [INFO] [stderr] Compiling form_urlencoded v1.2.2 [INFO] [stderr] Compiling once_cell v1.21.4 [INFO] [stderr] Compiling anyhow v1.0.103 [INFO] [stderr] Compiling zerocopy v0.8.54 [INFO] [stderr] Compiling rustls-pki-types v1.15.0 [INFO] [stderr] Compiling alsa-sys v0.3.1 [INFO] [stderr] Compiling base64 v0.22.1 [INFO] [stderr] Checking bytemuck v1.25.0 [INFO] [stderr] Compiling miniz_oxide v0.8.9 [INFO] [stderr] Checking tinyvec v1.11.0 [INFO] [stderr] Checking getrandom v0.2.17 [INFO] [stderr] Checking signal-hook v0.3.18 [INFO] [stderr] Checking parking_lot_core v0.9.12 [INFO] [stderr] Checking symphonia-core v0.5.5 [INFO] [stderr] Compiling syn v2.0.118 [INFO] [stderr] Compiling webpki-roots v1.0.8 [INFO] [stderr] Checking mio v1.2.1 [INFO] [stderr] Checking either v1.16.0 [INFO] [stderr] Compiling webpki-roots v0.26.11 [INFO] [stderr] Compiling flate2 v1.1.9 [INFO] [stderr] Checking alsa v0.9.1 [INFO] [stderr] Checking rustix v0.38.44 [INFO] [stderr] Checking signal-hook-mio v0.2.5 [INFO] [stderr] Checking itertools v0.13.0 [INFO] [stderr] Checking parking_lot v0.12.5 [INFO] [stderr] Checking compact_str v0.8.2 [INFO] [stderr] Checking lewton v0.10.2 [INFO] [stderr] Compiling filetime v0.2.29 [INFO] [stderr] Compiling ring v0.17.14 [INFO] [stderr] Compiling bzip2-sys v0.1.13+1.0.8 [INFO] [stderr] Compiling libsqlite3-sys v0.30.1 [INFO] [stderr] Compiling bzip2 v0.4.4 [INFO] [stderr] Checking cpal v0.15.3 [INFO] [stderr] Checking symphonia-metadata v0.5.5 [INFO] [stderr] Checking crossterm v0.28.1 [INFO] [stderr] Checking symphonia-bundle-mp3 v0.5.5 [INFO] [stderr] Checking unicode-truncate v1.1.0 [INFO] [stderr] Compiling xattr v1.6.1 [INFO] [stderr] Compiling tar v0.4.46 [INFO] [stderr] Checking symphonia v0.5.5 [INFO] [stderr] Checking rodio v0.20.1 [INFO] [stderr] Checking ll-audio v0.1.0 (/opt/rustwide/workdir/crates/audio) [INFO] [stderr] Checking rustls-webpki v0.103.13 [INFO] [stderr] Compiling synstructure v0.13.2 [INFO] [stderr] Compiling darling_core v0.23.0 [INFO] [stderr] Checking ahash v0.8.12 [INFO] [stderr] Checking hashbrown v0.14.5 [INFO] [stderr] Compiling zerofrom-derive v0.1.7 [INFO] [stderr] Compiling yoke-derive v0.8.2 [INFO] [stderr] Compiling zerovec-derive v0.11.3 [INFO] [stderr] Compiling displaydoc v0.2.6 [INFO] [stderr] Compiling serde_derive v1.0.228 [INFO] [stderr] Compiling strum_macros v0.26.4 [INFO] [stderr] Checking hashlink v0.9.1 [INFO] [stderr] Compiling zerofrom v0.1.8 [INFO] [stderr] Compiling yoke v0.8.3 [INFO] [stderr] Checking zerotrie v0.2.4 [INFO] [stderr] Checking zerovec v0.11.6 [INFO] [stderr] Checking tinystr v0.8.3 [INFO] [stderr] Checking potential_utf v0.1.5 [INFO] [stderr] Checking strum v0.26.3 [INFO] [stderr] Checking icu_collections v2.2.0 [INFO] [stderr] Checking icu_locale_core v2.2.0 [INFO] [stderr] Compiling darling_macro v0.23.0 [INFO] [stderr] Compiling darling v0.23.0 [INFO] [stderr] Compiling instability v0.3.12 [INFO] [stderr] Checking ratatui v0.29.0 [INFO] [stderr] Checking icu_provider v2.2.0 [INFO] [stderr] Checking icu_properties v2.2.0 [INFO] [stderr] Checking icu_normalizer v2.2.0 [INFO] [stderr] Checking serde v1.0.228 [INFO] [stderr] Checking chrono v0.4.45 [INFO] [stderr] Checking ll-core v0.1.0 (/opt/rustwide/workdir/crates/core) [INFO] [stderr] Compiling idna_adapter v1.2.2 [INFO] [stderr] Compiling idna v1.1.0 [INFO] [stderr] Compiling url v2.5.8 [INFO] [stderr] Checking rusqlite v0.32.1 [INFO] [stderr] Checking ureq v2.12.1 [INFO] [stderr] Checking ll-srs v0.1.0 (/opt/rustwide/workdir/crates/srs) [INFO] [stderr] Compiling sherpa-onnx-sys v1.13.4 [INFO] [stderr] error: failed to run custom build command for `sherpa-onnx-sys v1.13.4` [INFO] [stderr] note: To improve backtraces for build dependencies, set the CARGO_PROFILE_DEV_BUILD_OVERRIDE_DEBUG=true environment variable to enable debug information generation. [INFO] [stderr] [INFO] [stderr] Caused by: [INFO] [stderr] process didn't exit successfully: `/opt/rustwide/target/debug/build/sherpa-onnx-sys/a347a5a192adc2e5/out/build_script_build` (exit status: 101) [INFO] [stderr] --- stdout [INFO] [stderr] cargo:rerun-if-env-changed=SHERPA_ONNX_LIB_DIR [INFO] [stderr] cargo:rerun-if-env-changed=SHERPA_ONNX_ARCHIVE_DIR [INFO] [stderr] cargo:rerun-if-env-changed=DOCS_RS [INFO] [stderr] [INFO] [stderr] --- stderr [INFO] [stderr] Downloading sherpa-onnx libs from https://github.com/k2-fsa/sherpa-onnx/releases/download/v1.13.4/sherpa-onnx-v1.13.4-linux-x64-static-lib.tar.bz2 [INFO] [stderr] [INFO] [stderr] thread 'main' (1535) panicked at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/sherpa-onnx-sys-1.13.4/build.rs:40:9: [INFO] [stderr] Failed to download sherpa-onnx archive from https://github.com/k2-fsa/sherpa-onnx/releases/download/v1.13.4/sherpa-onnx-v1.13.4-linux-x64-static-lib.tar.bz2: https://github.com/k2-fsa/sherpa-onnx/releases/download/v1.13.4/sherpa-onnx-v1.13.4-linux-x64-static-lib.tar.bz2: Dns Failed: resolve dns name 'github.com:443': failed to lookup address information: Temporary failure in name resolution [INFO] [stderr] stack backtrace: [INFO] [stderr] 0: 0x5b72a9ca3fd1 - std[6c2a0dbef48b3596]::backtrace_rs::backtrace::libunwind::trace [INFO] [stderr] at /rustc/a5689b034ad287112f709693384a37f1377eb9cc/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9 [INFO] [stderr] 1: 0x5b72a9ca3fd1 - std[6c2a0dbef48b3596]::backtrace_rs::backtrace::trace_unsynchronized:: [INFO] [stderr] at /rustc/a5689b034ad287112f709693384a37f1377eb9cc/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14 [INFO] [stderr] 2: 0x5b72a9ca3fd1 - std[6c2a0dbef48b3596]::sys::backtrace::_print_fmt [INFO] [stderr] at /rustc/a5689b034ad287112f709693384a37f1377eb9cc/library/std/src/sys/backtrace.rs:74:9 [INFO] [stderr] 3: 0x5b72a9ca3fd1 - <::print::DisplayBacktrace as core[5cfedd726a2aab80]::fmt::Display>::fmt [INFO] [stderr] at /rustc/a5689b034ad287112f709693384a37f1377eb9cc/library/std/src/sys/backtrace.rs:44:26 [INFO] [stderr] 4: 0x5b72a9cb81fa - ::fmt [INFO] [stderr] at /rustc/a5689b034ad287112f709693384a37f1377eb9cc/library/core/src/fmt/rt.rs:152:76 [INFO] [stderr] 5: 0x5b72a9cb81fa - core[5cfedd726a2aab80]::fmt::write [INFO] [stderr] 6: 0x5b72a9ca8aec - core[5cfedd726a2aab80]::io::write::default_write_fmt:: [INFO] [stderr] at /rustc/a5689b034ad287112f709693384a37f1377eb9cc/library/core/src/io/write.rs:402:11 [INFO] [stderr] 7: 0x5b72a9ca8aec - ::write_fmt [INFO] [stderr] at /rustc/a5689b034ad287112f709693384a37f1377eb9cc/library/core/src/io/write.rs:335:13 [INFO] [stderr] 8: 0x5b72a9c87dc6 - ::print [INFO] [stderr] at /rustc/a5689b034ad287112f709693384a37f1377eb9cc/library/std/src/sys/backtrace.rs:47:9 [INFO] [stderr] 9: 0x5b72a9c87dc6 - std[6c2a0dbef48b3596]::panicking::default_hook::{closure#0} [INFO] [stderr] at /rustc/a5689b034ad287112f709693384a37f1377eb9cc/library/std/src/panicking.rs:289:27 [INFO] [stderr] 10: 0x5b72a9c9d3c1 - std[6c2a0dbef48b3596]::panicking::default_hook [INFO] [stderr] at /rustc/a5689b034ad287112f709693384a37f1377eb9cc/library/std/src/panicking.rs:316:9 [INFO] [stderr] 11: 0x5b72a9c9d57b - std[6c2a0dbef48b3596]::panicking::panic_with_hook [INFO] [stderr] at /rustc/a5689b034ad287112f709693384a37f1377eb9cc/library/std/src/panicking.rs:811:13 [INFO] [stderr] 12: 0x5b72a9c87e72 - std[6c2a0dbef48b3596]::panicking::panic_handler::{closure#0} [INFO] [stderr] at /rustc/a5689b034ad287112f709693384a37f1377eb9cc/library/std/src/panicking.rs:685:13 [INFO] [stderr] 13: 0x5b72a9c80a39 - std[6c2a0dbef48b3596]::sys::backtrace::__rust_end_short_backtrace:: [INFO] [stderr] at /rustc/a5689b034ad287112f709693384a37f1377eb9cc/library/std/src/sys/backtrace.rs:182:18 [INFO] [stderr] 14: 0x5b72a9c88c2d - __rustc[e78853b1b03fd772]::rust_begin_unwind [INFO] [stderr] at /rustc/a5689b034ad287112f709693384a37f1377eb9cc/library/std/src/panicking.rs:676:5 [INFO] [stderr] 15: 0x5b72a9cb898c - core[5cfedd726a2aab80]::panicking::panic_fmt [INFO] [stderr] at /rustc/a5689b034ad287112f709693384a37f1377eb9cc/library/core/src/panicking.rs:80:14 [INFO] [stderr] 16: 0x5b72a99cf638 - build_script_build[ad84c51606f2cbd9]::main [INFO] [stderr] 17: 0x5b72a99d52b3 - >::call_once [INFO] [stderr] 18: 0x5b72a99d282e - std[6c2a0dbef48b3596]::sys::backtrace::__rust_begin_short_backtrace:: [INFO] [stderr] 19: 0x5b72a99d2f79 - std[6c2a0dbef48b3596]::rt::lang_start::<()>::{closure#0} [INFO] [stderr] 20: 0x5b72a9c9cb68 - <&dyn core[5cfedd726a2aab80]::ops::function::Fn<(), Output = i32> + core[5cfedd726a2aab80]::marker::Sync + core[5cfedd726a2aab80]::panic::unwind_safe::RefUnwindSafe as core[5cfedd726a2aab80]::ops::function::FnOnce<()>>::call_once [INFO] [stderr] at /rustc/a5689b034ad287112f709693384a37f1377eb9cc/library/core/src/ops/function.rs:287:21 [INFO] [stderr] 21: 0x5b72a9c9cb68 - std[6c2a0dbef48b3596]::panicking::catch_unwind::do_call::<&dyn core[5cfedd726a2aab80]::ops::function::Fn<(), Output = i32> + core[5cfedd726a2aab80]::marker::Sync + core[5cfedd726a2aab80]::panic::unwind_safe::RefUnwindSafe, i32> [INFO] [stderr] at /rustc/a5689b034ad287112f709693384a37f1377eb9cc/library/std/src/panicking.rs:573:43 [INFO] [stderr] 22: 0x5b72a9c9cb68 - std[6c2a0dbef48b3596]::panicking::catch_unwind:: + core[5cfedd726a2aab80]::marker::Sync + core[5cfedd726a2aab80]::panic::unwind_safe::RefUnwindSafe> [INFO] [stderr] at /rustc/a5689b034ad287112f709693384a37f1377eb9cc/library/std/src/panicking.rs:541:19 [INFO] [stderr] 23: 0x5b72a9c9cb68 - std[6c2a0dbef48b3596]::panic::catch_unwind::<&dyn core[5cfedd726a2aab80]::ops::function::Fn<(), Output = i32> + core[5cfedd726a2aab80]::marker::Sync + core[5cfedd726a2aab80]::panic::unwind_safe::RefUnwindSafe, i32> [INFO] [stderr] at /rustc/a5689b034ad287112f709693384a37f1377eb9cc/library/std/src/panic.rs:359:14 [INFO] [stderr] 24: 0x5b72a9c9cb68 - std[6c2a0dbef48b3596]::rt::lang_start_internal::{closure#0} [INFO] [stderr] at /rustc/a5689b034ad287112f709693384a37f1377eb9cc/library/std/src/rt.rs:175:24 [INFO] [stderr] 25: 0x5b72a9c9cb68 - std[6c2a0dbef48b3596]::panicking::catch_unwind::do_call:: [INFO] [stderr] at /rustc/a5689b034ad287112f709693384a37f1377eb9cc/library/std/src/panicking.rs:573:43 [INFO] [stderr] 26: 0x5b72a9c9cb68 - std[6c2a0dbef48b3596]::panicking::catch_unwind:: [INFO] [stderr] at /rustc/a5689b034ad287112f709693384a37f1377eb9cc/library/std/src/panicking.rs:541:19 [INFO] [stderr] 27: 0x5b72a9c9cb68 - std[6c2a0dbef48b3596]::panic::catch_unwind:: [INFO] [stderr] at /rustc/a5689b034ad287112f709693384a37f1377eb9cc/library/std/src/panic.rs:359:14 [INFO] [stderr] 28: 0x5b72a9c9cb68 - std[6c2a0dbef48b3596]::rt::lang_start_internal [INFO] [stderr] at /rustc/a5689b034ad287112f709693384a37f1377eb9cc/library/std/src/rt.rs:171:5 [INFO] [stderr] 29: 0x5b72a99d2701 - std[6c2a0dbef48b3596]::rt::lang_start::<()> [INFO] [stderr] 30: 0x5b72a99d1295 - main [INFO] [stderr] 31: 0x7777c3c25601 - [INFO] [stderr] 32: 0x7777c3c25718 - __libc_start_main [INFO] [stderr] 33: 0x5b72a99c7f25 - _start [INFO] [stderr] 34: 0x0 - [INFO] [stderr] warning: unused dependency `serde_json` [INFO] [stderr] --> crates/core/Cargo.toml:9:1 [INFO] [stderr] | [INFO] [stderr] 9 | serde_json.workspace = true [INFO] [stderr] | ^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `cargo::unused_dependencies` is set to `warn` by default [INFO] [stderr] help: consider removing the dependency on `serde_json` [INFO] [stderr] warning: `ll-core` (manifest) generated 1 warning [INFO] [stderr] warning: unused dependency `ll-core` [INFO] [stderr] --> crates/srs/Cargo.toml:8:1 [INFO] [stderr] | [INFO] [stderr] 8 | ll-core = { path = "../core" } [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `cargo::unused_dependencies` is set to `warn` by default [INFO] [stderr] help: consider removing the dependency on `ll-core` [INFO] [stderr] warning: `ll-srs` (manifest) generated 1 warning [INFO] running `Command { std: "docker" "inspect" "f5d5ef3006254c8b767a483b33a7a3a41be7282ea1673baff0e08c11048a80b9", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "f5d5ef3006254c8b767a483b33a7a3a41be7282ea1673baff0e08c11048a80b9", kill_on_drop: false }` [INFO] [stdout] f5d5ef3006254c8b767a483b33a7a3a41be7282ea1673baff0e08c11048a80b9