[INFO] cloning repository https://github.com/egorich239/tresor [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/egorich239/tresor" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fegorich239%2Ftresor", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fegorich239%2Ftresor'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 9224afd100b277a77ec3ac7fa86099ec2c6849ff [INFO] testing egorich239/tresor against try#db823df02fd0c2cf67b43025ac3fef3f2d743245 for pr-150681-1 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fegorich239%2Ftresor" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'... [INFO] [stderr] done. [INFO] started tweaking git repo https://github.com/egorich239/tresor [INFO] finished tweaking git repo https://github.com/egorich239/tresor [INFO] tweaked toml for git repo https://github.com/egorich239/tresor written to /workspace/builds/worker-6-tc2/source/Cargo.toml [INFO] validating manifest of git repo https://github.com/egorich239/tresor on toolchain db823df02fd0c2cf67b43025ac3fef3f2d743245 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate git repo https://github.com/egorich239/tresor 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" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 035f71e9ebd7abd13bfc1002a99ca62d814c0cce327b41f9f79cbf7715c61e94 [INFO] running `Command { std: "docker" "start" "-a" "035f71e9ebd7abd13bfc1002a99ca62d814c0cce327b41f9f79cbf7715c61e94", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "035f71e9ebd7abd13bfc1002a99ca62d814c0cce327b41f9f79cbf7715c61e94", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "035f71e9ebd7abd13bfc1002a99ca62d814c0cce327b41f9f79cbf7715c61e94", kill_on_drop: false }` [INFO] [stdout] 035f71e9ebd7abd13bfc1002a99ca62d814c0cce327b41f9f79cbf7715c61e94 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 299b58aaad045375163e5a51380229799d934206e379d7159c41f47e5c5529ac [INFO] running `Command { std: "docker" "start" "-a" "299b58aaad045375163e5a51380229799d934206e379d7159c41f47e5c5529ac", kill_on_drop: false }` [INFO] [stderr] Compiling serde v1.0.219 [INFO] [stderr] Compiling getrandom v0.2.16 [INFO] [stderr] Compiling zeroize_derive v1.4.2 [INFO] [stderr] Compiling cc v1.2.31 [INFO] [stderr] Compiling subtle v2.6.1 [INFO] [stderr] Compiling tinystr v0.8.1 [INFO] [stderr] Compiling futures-io v0.3.31 [INFO] [stderr] Compiling socket2 v0.6.0 [INFO] [stderr] Compiling smallvec v1.15.1 [INFO] [stderr] Compiling tracing v0.1.41 [INFO] [stderr] Compiling rand_core v0.6.4 [INFO] [stderr] Compiling icu_locale_core v2.0.0 [INFO] [stderr] Compiling foldhash v0.1.5 [INFO] [stderr] Compiling crypto-common v0.1.6 [INFO] [stderr] Compiling hashbrown v0.15.4 [INFO] [stderr] Compiling futures-util v0.3.31 [INFO] [stderr] Compiling digest v0.10.7 [INFO] [stderr] Compiling zeroize v1.8.1 [INFO] [stderr] Compiling signal-hook-registry v1.4.6 [INFO] [stderr] Compiling glob v0.3.2 [INFO] [stderr] Compiling icu_provider v2.0.0 [INFO] [stderr] Compiling tokio v1.47.1 [INFO] [stderr] Compiling indexmap v2.10.0 [INFO] [stderr] Compiling sha2 v0.10.9 [INFO] [stderr] Compiling icu_properties v2.0.1 [INFO] [stderr] Compiling clang-sys v1.8.1 [INFO] [stderr] Compiling ring v0.17.14 [INFO] [stderr] Compiling crossbeam-utils v0.8.21 [INFO] [stderr] Compiling regex-syntax v0.8.5 [INFO] [stderr] Compiling serde_json v1.0.142 [INFO] [stderr] Compiling minimal-lexical v0.2.1 [INFO] [stderr] Compiling type-map v0.5.1 [INFO] [stderr] Compiling nom v7.1.3 [INFO] [stderr] Compiling unic-langid-impl v0.9.6 [INFO] [stderr] Compiling either v1.15.0 [INFO] [stderr] Compiling unic-langid v0.9.6 [INFO] [stderr] Compiling regex-automata v0.4.9 [INFO] [stderr] Compiling parking_lot_core v0.9.11 [INFO] [stderr] Compiling inout v0.1.4 [INFO] [stderr] Compiling libloading v0.8.8 [INFO] [stderr] Compiling bindgen v0.69.5 [INFO] [stderr] Compiling same-file v1.0.6 [INFO] [stderr] Compiling walkdir v2.5.0 [INFO] [stderr] Compiling rustls-pki-types v1.12.0 [INFO] [stderr] Compiling parking_lot v0.12.4 [INFO] [stderr] Compiling cexpr v0.6.0 [INFO] [stderr] Compiling cipher v0.4.4 [INFO] [stderr] Compiling itertools v0.12.1 [INFO] [stderr] Compiling openssl-sys v0.9.109 [INFO] [stderr] Compiling rustls v0.23.31 [INFO] [stderr] Compiling regex v1.11.1 [INFO] [stderr] Compiling num-traits v0.2.19 [INFO] [stderr] Compiling self_cell v1.2.0 [INFO] [stderr] Compiling thiserror v2.0.12 [INFO] [stderr] Compiling lazycell v1.3.0 [INFO] [stderr] Compiling futures-sink v0.3.31 [INFO] [stderr] Compiling semver v1.0.26 [INFO] [stderr] Compiling self_cell v0.10.3 [INFO] [stderr] Compiling concurrent-queue v2.5.0 [INFO] [stderr] Compiling fluent-syntax v0.11.1 [INFO] [stderr] Compiling icu_normalizer v2.0.0 [INFO] [stderr] Compiling thiserror-impl v2.0.12 [INFO] [stderr] Compiling crc-catalog v2.4.0 [INFO] [stderr] Compiling event-listener v5.4.1 [INFO] [stderr] Compiling crc v3.3.0 [INFO] [stderr] Compiling idna_adapter v1.2.1 [INFO] [stderr] Compiling rust-embed-utils v8.7.2 [INFO] [stderr] Compiling crossbeam-queue v0.3.12 [INFO] [stderr] Compiling serde_urlencoded v0.7.1 [INFO] [stderr] Compiling hashlink v0.10.0 [INFO] [stderr] Compiling universal-hash v0.5.1 [INFO] [stderr] Compiling opaque-debug v0.3.1 [INFO] [stderr] Compiling rust-embed-impl v8.7.2 [INFO] [stderr] Compiling rustc_version v0.4.1 [INFO] [stderr] Compiling idna v1.0.3 [INFO] [stderr] Compiling tokio-util v0.7.16 [INFO] [stderr] Compiling webpki-roots v1.0.2 [INFO] [stderr] Compiling rustls-webpki v0.103.4 [INFO] [stderr] Compiling futures-executor v0.3.31 [INFO] [stderr] Compiling toml v0.5.11 [INFO] [stderr] Compiling basic-toml v0.1.10 [INFO] [stderr] Compiling openssl v0.10.73 [INFO] [stderr] Compiling atomic-waker v1.1.2 [INFO] [stderr] Compiling base64ct v1.8.0 [INFO] [stderr] Compiling find-crate v0.6.3 [INFO] [stderr] Compiling pem-rfc7468 v0.7.0 [INFO] [stderr] Compiling h2 v0.4.11 [INFO] [stderr] Compiling i18n-config v0.4.8 [INFO] [stderr] Compiling webpki-roots v0.26.11 [INFO] [stderr] Compiling curve25519-dalek v4.1.3 [INFO] [stderr] Compiling url v2.5.4 [INFO] [stderr] Compiling atoi v2.0.0 [INFO] [stderr] Compiling futures-intrusive v0.5.0 [INFO] [stderr] Compiling fluent-langneg v0.13.0 [INFO] [stderr] Compiling intl-memoizer v0.5.3 [INFO] [stderr] Compiling intl_pluralrules v7.0.2 [INFO] [stderr] Compiling hmac v0.12.1 [INFO] [stderr] Compiling const-oid v0.9.6 [INFO] [stderr] Compiling native-tls v0.2.14 [INFO] [stderr] Compiling base64 v0.22.1 [INFO] [stderr] Compiling der v0.7.10 [INFO] [stderr] Compiling fluent-bundle v0.15.3 [INFO] [stderr] Compiling libsqlite3-sys v0.30.1 [INFO] [stderr] Compiling tokio-stream v0.1.17 [INFO] [stderr] Compiling sqlx-core v0.8.6 [INFO] [stderr] Compiling hyper v1.6.0 [INFO] [stderr] Compiling i18n-embed-impl v0.8.4 [INFO] [stderr] Compiling flume v0.11.1 [INFO] [stderr] Compiling futures-channel v0.3.31 [INFO] [stderr] Compiling aead v0.5.2 [INFO] [stderr] Compiling curve25519-dalek-derive v0.1.1 [INFO] [stderr] Compiling arc-swap v1.7.1 [INFO] [stderr] Compiling hyper-util v0.1.16 [INFO] [stderr] Compiling sqlx-sqlite v0.8.6 [INFO] [stderr] Compiling rand_chacha v0.3.1 [INFO] [stderr] Compiling spki v0.7.3 [INFO] [stderr] Compiling fluent v0.16.1 [INFO] [stderr] Compiling tower v0.5.2 [INFO] [stderr] Compiling futures v0.3.31 [INFO] [stderr] Compiling rust-embed v8.7.2 [INFO] [stderr] Compiling poly1305 v0.8.0 [INFO] [stderr] Compiling chacha20 v0.9.1 [INFO] [stderr] Compiling proc-macro-error-attr2 v2.0.0 [INFO] [stderr] Compiling hex v0.4.3 [INFO] [stderr] Compiling dotenvy v0.15.7 [INFO] [stderr] Compiling chacha20poly1305 v0.10.1 [INFO] [stderr] Compiling proc-macro-error2 v2.0.1 [INFO] [stderr] Compiling sqlx-macros-core v0.8.6 [INFO] [stderr] Compiling i18n-embed v0.15.4 [INFO] [stderr] Compiling cookie-factory v0.3.3 [INFO] [stderr] Compiling tokio-native-tls v0.3.1 [INFO] [stderr] Compiling pkcs8 v0.10.2 [INFO] [stderr] Compiling rand v0.8.5 [INFO] [stderr] Compiling hkdf v0.12.4 [INFO] [stderr] Compiling pbkdf2 v0.12.2 [INFO] [stderr] Compiling polyval v0.6.2 [INFO] [stderr] Compiling salsa20 v0.10.2 [INFO] [stderr] Compiling secrecy v0.10.3 [INFO] [stderr] Compiling signature v2.2.0 [INFO] [stderr] Compiling pin-project-internal v1.1.10 [INFO] [stderr] Compiling base64 v0.21.7 [INFO] [stderr] Compiling winnow v0.7.12 [INFO] [stderr] Compiling anyhow v1.0.98 [INFO] [stderr] Compiling io_tee v0.1.1 [INFO] [stderr] Compiling age-core v0.11.0 [INFO] [stderr] Compiling bstr v1.12.0 [INFO] [stderr] Compiling sqlx-macros v0.8.6 [INFO] [stderr] Compiling pin-project v1.1.10 [INFO] [stderr] Compiling clap_builder v4.5.42 [INFO] [stderr] Compiling tower-http v0.6.6 [INFO] [stderr] Compiling i18n-embed-fl v0.9.4 [INFO] [stderr] Compiling ed25519 v2.2.3 [INFO] [stderr] Compiling ghash v0.5.1 [INFO] [stderr] Compiling scrypt v0.11.0 [INFO] [stderr] Compiling toml_parser v1.0.1 [INFO] [stderr] Compiling axum-core v0.5.2 [INFO] [stderr] Compiling hyper-tls v0.6.0 [INFO] [stderr] Compiling x25519-dalek v2.0.1 [INFO] [stderr] Compiling aes v0.8.4 [INFO] [stderr] Compiling ctr v0.9.2 [INFO] [stderr] Compiling serde_path_to_error v0.1.17 [INFO] [stderr] Compiling serde_spanned v1.0.0 [INFO] [stderr] Compiling toml_datetime v0.7.0 [INFO] [stderr] Compiling axum-macros v0.5.0 [INFO] [stderr] Compiling encoding_rs v0.8.35 [INFO] [stderr] Compiling iana-time-zone v0.1.63 [INFO] [stderr] Compiling matchit v0.8.4 [INFO] [stderr] Compiling humantime v2.2.0 [INFO] [stderr] Compiling toml_writer v1.0.2 [INFO] [stderr] Compiling bech32 v0.9.1 [INFO] [stderr] Compiling age v0.11.1 [INFO] [stderr] Compiling toml v0.9.4 [INFO] [stderr] Compiling reqwest v0.12.22 [INFO] [stderr] Compiling axum v0.8.4 [INFO] [stderr] Compiling sqlx v0.8.6 [INFO] [stderr] Compiling humantime-serde v1.1.1 [INFO] [stderr] Compiling chrono v0.4.41 [INFO] [stderr] Compiling clap v4.5.42 [INFO] [stderr] Compiling aes-gcm v0.10.3 [INFO] [stderr] Compiling ed25519-dalek v2.2.0 [INFO] [stderr] Compiling shell-quote v0.7.2 [INFO] [stderr] Compiling tresor v0.1.5 (/opt/rustwide/workdir) [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 34.29s [INFO] running `Command { std: "docker" "inspect" "299b58aaad045375163e5a51380229799d934206e379d7159c41f47e5c5529ac", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "299b58aaad045375163e5a51380229799d934206e379d7159c41f47e5c5529ac", kill_on_drop: false }` [INFO] [stdout] 299b58aaad045375163e5a51380229799d934206e379d7159c41f47e5c5529ac [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] c667949a3a3ed297903154a43a440f2e9b68a1512d4b3a35ec5e5883b701b88a [INFO] running `Command { std: "docker" "start" "-a" "c667949a3a3ed297903154a43a440f2e9b68a1512d4b3a35ec5e5883b701b88a", kill_on_drop: false }` [INFO] [stderr] Compiling tresor v0.1.5 (/opt/rustwide/workdir) [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 1.83s [INFO] running `Command { std: "docker" "inspect" "c667949a3a3ed297903154a43a440f2e9b68a1512d4b3a35ec5e5883b701b88a", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "c667949a3a3ed297903154a43a440f2e9b68a1512d4b3a35ec5e5883b701b88a", kill_on_drop: false }` [INFO] [stdout] c667949a3a3ed297903154a43a440f2e9b68a1512d4b3a35ec5e5883b701b88a [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "test" "--frozen", kill_on_drop: false }` [INFO] [stdout] 75d156b4e795fe1b5e0aa237a4ebd7fdced76e29e5822ce49ae36b4941dfbc8b [INFO] running `Command { std: "docker" "start" "-a" "75d156b4e795fe1b5e0aa237a4ebd7fdced76e29e5822ce49ae36b4941dfbc8b", kill_on_drop: false }` [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 0.19s [INFO] [stderr] Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/tresor-4623bcb2287347b9) [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 unittests src/bin/tresor.rs (/opt/rustwide/target/debug/deps/tresor-264f21f4afbc43a9) [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 unittests src/bin/tresor-srv.rs (/opt/rustwide/target/debug/deps/tresor_srv-e6d7d055763a815b) [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 tresor [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" "75d156b4e795fe1b5e0aa237a4ebd7fdced76e29e5822ce49ae36b4941dfbc8b", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "75d156b4e795fe1b5e0aa237a4ebd7fdced76e29e5822ce49ae36b4941dfbc8b", kill_on_drop: false }` [INFO] [stdout] 75d156b4e795fe1b5e0aa237a4ebd7fdced76e29e5822ce49ae36b4941dfbc8b