[INFO] cloning repository https://github.com/vincentzreo/04-ecosystem
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/vincentzreo/04-ecosystem" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvincentzreo%2F04-ecosystem", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvincentzreo%2F04-ecosystem'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bd1e96bc559c8110b504dc4aee11ff2a6b61b175
[INFO] checking vincentzreo/04-ecosystem against master#d49be02cf6d2e2a01264fcdef1e20c826710c0f5 for pr-133570-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvincentzreo%2F04-ecosystem" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/vincentzreo/04-ecosystem on toolchain d49be02cf6d2e2a01264fcdef1e20c826710c0f5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d49be02cf6d2e2a01264fcdef1e20c826710c0f5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/vincentzreo/04-ecosystem
[INFO] finished tweaking git repo https://github.com/vincentzreo/04-ecosystem
[INFO] tweaked toml for git repo https://github.com/vincentzreo/04-ecosystem written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/vincentzreo/04-ecosystem 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" "+d49be02cf6d2e2a01264fcdef1e20c826710c0f5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+d49be02cf6d2e2a01264fcdef1e20c826710c0f5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9a4c1aacc5bc87939135581381dc1bd2ae80ea342a358353f7ed0b97d71e207d
[INFO] running `Command { std: "docker" "start" "-a" "9a4c1aacc5bc87939135581381dc1bd2ae80ea342a358353f7ed0b97d71e207d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9a4c1aacc5bc87939135581381dc1bd2ae80ea342a358353f7ed0b97d71e207d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9a4c1aacc5bc87939135581381dc1bd2ae80ea342a358353f7ed0b97d71e207d", kill_on_drop: false }`
[INFO] [stdout] 9a4c1aacc5bc87939135581381dc1bd2ae80ea342a358353f7ed0b97d71e207d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+d49be02cf6d2e2a01264fcdef1e20c826710c0f5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0c69fa6bafa574ea3a3bd4a2c8b6472d3360b32d640e36de4d7e215fbb3cfcbf
[INFO] running `Command { std: "docker" "start" "-a" "0c69fa6bafa574ea3a3bd4a2c8b6472d3360b32d640e36de4d7e215fbb3cfcbf", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.155
[INFO] [stderr]    Compiling proc-macro2 v1.0.84
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling autocfg v1.3.0
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]     Checking pin-project-lite v0.2.14
[INFO] [stderr]    Compiling parking_lot_core v0.9.10
[INFO] [stderr]     Checking once_cell v1.19.0
[INFO] [stderr]    Compiling typenum v1.17.0
[INFO] [stderr]     Checking bytes v1.6.0
[INFO] [stderr]     Checking futures-core v0.3.30
[INFO] [stderr]    Compiling lock_api v0.4.12
[INFO] [stderr]    Compiling slab v0.4.9
[INFO] [stderr]     Checking smallvec v1.13.2
[INFO] [stderr]    Compiling quote v1.0.36
[INFO] [stderr]    Compiling generic-array v0.14.7
[INFO] [stderr]    Compiling ahash v0.8.11
[INFO] [stderr]     Checking itoa v1.0.11
[INFO] [stderr]    Compiling syn v2.0.66
[INFO] [stderr]     Checking futures-sink v0.3.30
[INFO] [stderr]     Checking scopeguard v1.2.0
[INFO] [stderr]     Checking memchr v2.7.2
[INFO] [stderr]     Checking log v0.4.21
[INFO] [stderr]     Checking tracing-core v0.1.32
[INFO] [stderr]     Checking futures-channel v0.3.30
[INFO] [stderr]     Checking futures-task v0.3.30
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]     Checking futures-io v0.3.30
[INFO] [stderr]     Checking zerocopy v0.7.34
[INFO] [stderr]    Compiling rustversion v1.0.17
[INFO] [stderr]     Checking fnv v1.0.7
[INFO] [stderr]    Compiling cc v1.0.98
[INFO] [stderr]    Compiling serde v1.0.203
[INFO] [stderr]     Checking allocator-api2 v0.2.18
[INFO] [stderr]     Checking getrandom v0.2.15
[INFO] [stderr]     Checking signal-hook-registry v1.4.2
[INFO] [stderr]     Checking parking_lot v0.12.3
[INFO] [stderr]     Checking socket2 v0.5.7
[INFO] [stderr]     Checking num_cpus v1.16.0
[INFO] [stderr]     Checking mio v0.8.11
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking equivalent v1.0.1
[INFO] [stderr]     Checking ppv-lite86 v0.2.17
[INFO] [stderr]     Checking hashbrown v0.14.5
[INFO] [stderr]     Checking percent-encoding v2.3.1
[INFO] [stderr]    Compiling thiserror v1.0.61
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling httparse v1.8.0
[INFO] [stderr]     Checking indexmap v2.2.6
[INFO] [stderr]    Compiling crossbeam-utils v0.8.20
[INFO] [stderr]     Checking tower-service v0.3.2
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking http v0.2.12
[INFO] [stderr]    Compiling ring v0.17.8
[INFO] [stderr]    Compiling anyhow v1.0.86
[INFO] [stderr]     Checking crypto-common v0.1.6
[INFO] [stderr]     Checking httpdate v1.0.3
[INFO] [stderr]    Compiling serde_json v1.0.117
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]     Checking base64 v0.21.7
[INFO] [stderr]     Checking tower-layer v0.3.2
[INFO] [stderr]     Checking subtle v2.5.0
[INFO] [stderr]     Checking http-body v0.4.6
[INFO] [stderr]     Checking hashbrown v0.12.3
[INFO] [stderr]     Checking try-lock v0.2.5
[INFO] [stderr]    Compiling tinyvec_macros v0.1.1
[INFO] [stderr]    Compiling rustls v0.21.12
[INFO] [stderr]    Compiling block-buffer v0.10.4
[INFO] [stderr]     Checking mime v0.3.17
[INFO] [stderr]    Compiling tinyvec v1.6.0
[INFO] [stderr]     Checking want v0.3.1
[INFO] [stderr]    Compiling axum-core v0.3.4
[INFO] [stderr]    Compiling digest v0.10.7
[INFO] [stderr]     Checking sync_wrapper v0.1.2
[INFO] [stderr]    Compiling spin v0.9.8
[INFO] [stderr]    Compiling paste v1.0.15
[INFO] [stderr]    Compiling untrusted v0.9.0
[INFO] [stderr]    Compiling axum v0.6.20
[INFO] [stderr]    Compiling strsim v0.11.1
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]    Compiling unicode-bidi v0.3.15
[INFO] [stderr]     Checking matchit v0.7.3
[INFO] [stderr]    Compiling unicode-normalization v0.1.23
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]     Checking cpufeatures v0.2.12
[INFO] [stderr]     Checking regex-syntax v0.8.3
[INFO] [stderr]     Checking minimal-lexical v0.2.1
[INFO] [stderr] rustc-LLVM ERROR: IO failure on output stream: No space left on device
[INFO] [stdout] error: couldn't create a temp dir: No space left on device (os error 28) at path "/opt/rustwide/target/debug/deps/rmeta7Qp6C7"
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `socket2` (lib)
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   No space left on device (os error 28)
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to parse process output: `/opt/rustwide/rustup-home/toolchains/d49be02cf6d2e2a01264fcdef1e20c826710c0f5/bin/rustc --crate-name socket2 --edition=2021 /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/socket2-0.5.7/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no --cfg 'feature="all"' --check-cfg 'cfg(docsrs)' --check-cfg 'cfg(feature, values("all"))' -C metadata=8efe65cdc23d16f5 -C extra-filename=-8efe65cdc23d16f5 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern libc=/opt/rustwide/target/debug/deps/liblibc-a0a95122648940ff.rmeta --cap-lints allow --cap-lints=forbid` (exit status: 101)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: ring@0.17.8: ar: /opt/rustwide/target/debug/build/ring-23eb44385dd4860a/out/libring_core_0_17_8_.a: No space left on device
[INFO] [stderr] error: failed to run custom build command for `ring v0.17.8`
[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/ring-ae9b7a3e133bd573/build-script-build` (exit status: 1)
[INFO] [stderr]   --- stdout
[INFO] [stderr]   cargo:rerun-if-env-changed=RING_PREGENERATE_ASM
[INFO] [stderr]   cargo:rustc-env=RING_CORE_PREFIX=ring_core_0_17_8_
[INFO] [stderr]   OPT_LEVEL = Some("0")
[INFO] [stderr]   TARGET = Some("x86_64-unknown-linux-gnu")
[INFO] [stderr]   HOST = Some("x86_64-unknown-linux-gnu")
[INFO] [stderr]   cargo:rerun-if-env-changed=CC_x86_64-unknown-linux-gnu
[INFO] [stderr]   CC_x86_64-unknown-linux-gnu = None
[INFO] [stderr]   cargo:rerun-if-env-changed=CC_x86_64_unknown_linux_gnu
[INFO] [stderr]   CC_x86_64_unknown_linux_gnu = None
[INFO] [stderr]   cargo:rerun-if-env-changed=HOST_CC
[INFO] [stderr]   HOST_CC = None
[INFO] [stderr]   cargo:rerun-if-env-changed=CC
[INFO] [stderr]   CC = None
[INFO] [stderr]   cargo:rerun-if-env-changed=CC_ENABLE_DEBUG_OUTPUT
[INFO] [stderr]   cargo:rerun-if-env-changed=CRATE_CC_NO_DEFAULTS
[INFO] [stderr]   CRATE_CC_NO_DEFAULTS = None
[INFO] [stderr]   DEBUG = Some("true")
[INFO] [stderr]   CARGO_CFG_TARGET_FEATURE = Some("fxsr,sse,sse2")
[INFO] [stderr]   cargo:rerun-if-env-changed=CFLAGS_x86_64-unknown-linux-gnu
[INFO] [stderr]   CFLAGS_x86_64-unknown-linux-gnu = None
[INFO] [stderr]   cargo:rerun-if-env-changed=CFLAGS_x86_64_unknown_linux_gnu
[INFO] [stderr]   CFLAGS_x86_64_unknown_linux_gnu = None
[INFO] [stderr]   cargo:rerun-if-env-changed=HOST_CFLAGS
[INFO] [stderr]   HOST_CFLAGS = None
[INFO] [stderr]   cargo:rerun-if-env-changed=CFLAGS
[INFO] [stderr]   CFLAGS = None
[INFO] [stderr]   cargo:warning=ar: /opt/rustwide/target/debug/build/ring-23eb44385dd4860a/out/libring_core_0_17_8_.a: No space left on device
[INFO] [stderr] 
[INFO] [stderr]   --- stderr
[INFO] [stderr] 
[INFO] [stderr] 
[INFO] [stderr]   error occurred: Command ZERO_AR_DATE="1" "ar" "cq" "/opt/rustwide/target/debug/build/ring-23eb44385dd4860a/out/libring_core_0_17_8_.a" "/opt/rustwide/target/debug/build/ring-23eb44385dd4860a/out/fad98b632b8ce3cc-curve25519.o" "/opt/rustwide/target/debug/build/ring-23eb44385dd4860a/out/ca4b6ef5433f5aeb-aes_nohw.o" "/opt/rustwide/target/debug/build/ring-23eb44385dd4860a/out/ca8bd8684bb569fa-montgomery.o" "/opt/rustwide/target/debug/build/ring-23eb44385dd4860a/out/ca8bd8684bb569fa-montgomery_inv.o" "/opt/rustwide/target/debug/build/ring-23eb44385dd4860a/out/a9af75d892b04b75-ecp_nistz.o" "/opt/rustwide/target/debug/build/ring-23eb44385dd4860a/out/a9af75d892b04b75-gfp_p256.o" "/opt/rustwide/target/debug/build/ring-23eb44385dd4860a/out/a9af75d892b04b75-gfp_p384.o" "/opt/rustwide/target/debug/build/ring-23eb44385dd4860a/out/a9af75d892b04b75-p256.o" "/opt/rustwide/target/debug/build/ring-23eb44385dd4860a/out/a1949f2101df4b9c-limbs.o" "/opt/rustwide/target/debug/build/ring-23eb44385dd4860a/out/7effb53edfc7fa2d-mem.o" "/opt/rustwide/target/debug/build/ring-23eb44385dd4860a/out/bec76f70393ddef1-poly1305.o" "/opt/rustwide/target/debug/build/ring-23eb44385dd4860a/out/7effb53edfc7fa2d-crypto.o" "/opt/rustwide/target/debug/build/ring-23eb44385dd4860a/out/7effb53edfc7fa2d-cpu_intel.o" "/opt/rustwide/target/debug/build/ring-23eb44385dd4860a/out/fad98b632b8ce3cc-curve25519_64_adx.o" "/opt/rustwide/target/debug/build/ring-23eb44385dd4860a/out/bec76f70393ddef1-poly1305_vec.o" "/opt/rustwide/target/debug/build/ring-23eb44385dd4860a/out/c33e1852c646f991-fiat_curve25519_adx_mul.o" "/opt/rustwide/target/debug/build/ring-23eb44385dd4860a/out/c33e1852c646f991-fiat_curve25519_adx_square.o" "/opt/rustwide/target/debug/build/ring-23eb44385dd4860a/out/a9af75d892b04b75-p256-nistz.o" "/opt/rustwide/target/debug/build/ring-23eb44385dd4860a/out/f639a09d9039f1ce-chacha-x86_64-elf.o" "/opt/rustwide/target/debug/build/ring-23eb44385dd4860a/out/f639a09d9039f1ce-aesni-x86_64-elf.o" "/opt/rustwide/target/debug/build/ring-23eb44385dd4860a/out/f639a09d9039f1ce-vpaes-x86_64-elf.o" "/opt/rustwide/target/debug/build/ring-23eb44385dd4860a/out/f639a09d9039f1ce-x86_64-mont-elf.o" "/opt/rustwide/target/debug/build/ring-23eb44385dd4860a/out/f639a09d9039f1ce-x86_64-mont5-elf.o" "/opt/rustwide/target/debug/build/ring-23eb44385dd4860a/out/f639a09d9039f1ce-p256-x86_64-asm-elf.o" "/opt/rustwide/target/debug/build/ring-23eb44385dd4860a/out/f639a09d9039f1ce-aesni-gcm-x86_64-elf.o" "/opt/rustwide/target/debug/build/ring-23eb44385dd4860a/out/f639a09d9039f1ce-ghash-x86_64-elf.o" "/opt/rustwide/target/debug/build/ring-23eb44385dd4860a/out/f639a09d9039f1ce-sha512-x86_64-elf.o" "/opt/rustwide/target/debug/build/ring-23eb44385dd4860a/out/f639a09d9039f1ce-chacha20_poly1305_x86_64-elf.o" "/opt/rustwide/target/debug/build/ring-23eb44385dd4860a/out/f639a09d9039f1ce-sha256-x86_64-elf.o" with args ar did not execute successfully (status code exit status: 1).
[INFO] [stderr] 
[INFO] [stderr] 
[INFO] [stderr] error: could not compile `hashbrown` (lib) due to 1 previous error
[INFO] [stdout] error: couldn't create a temp dir: No space left on device (os error 28) at path "/opt/rustwide/target/debug/deps/rmetaa4qcF3"
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: couldn't create a temp dir: No space left on device (os error 28) at path "/opt/rustwide/target/debug/deps/rmeta9xd3pK"
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mio` (lib) due to 1 previous error
[INFO] [stderr] error: could not compile `minimal-lexical` (lib) due to 1 previous error
[INFO] [stderr] rustc-LLVM ERROR: IO failure on output stream: No space left on device
[INFO] [stderr] error: could not compile `syn` (lib)
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/d49be02cf6d2e2a01264fcdef1e20c826710c0f5/bin/rustc --crate-name syn --edition=2021 /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/syn-2.0.66/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no --cfg 'feature="clone-impls"' --cfg 'feature="default"' --cfg 'feature="derive"' --cfg 'feature="extra-traits"' --cfg 'feature="full"' --cfg 'feature="parsing"' --cfg 'feature="printing"' --cfg 'feature="proc-macro"' --cfg 'feature="visit-mut"' --check-cfg 'cfg(docsrs)' --check-cfg 'cfg(feature, values("clone-impls", "default", "derive", "extra-traits", "fold", "full", "parsing", "printing", "proc-macro", "test", "visit", "visit-mut"))' -C metadata=367ed9d97bd35bcb -C extra-filename=-367ed9d97bd35bcb --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-35935612b88763ec.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-4629b61207600449.rmeta --extern unicode_ident=/opt/rustwide/target/debug/deps/libunicode_ident-7b828347d8713ecd.rmeta --cap-lints allow --cap-lints=forbid` (exit status: 101)
[INFO] [stdout] error: failed to write to `/opt/rustwide/target/debug/deps/rmeta9lPack/lib.rmeta`: No space left on device (os error 28)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `regex-syntax` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "0c69fa6bafa574ea3a3bd4a2c8b6472d3360b32d640e36de4d7e215fbb3cfcbf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0c69fa6bafa574ea3a3bd4a2c8b6472d3360b32d640e36de4d7e215fbb3cfcbf", kill_on_drop: false }`
[INFO] [stdout] 0c69fa6bafa574ea3a3bd4a2c8b6472d3360b32d640e36de4d7e215fbb3cfcbf