[INFO] crate oysterpack_log 0.1.0 is already in cache [INFO] checking oysterpack_log-0.1.0 against master#9b9d2aff8de4d499b4ba7ca406e000f8d3754ea7 for pr-64564 [INFO] extracting crate oysterpack_log 0.1.0 into work/builds/worker-3/source [INFO] validating manifest of crates.io crate oysterpack_log 0.1.0 on toolchain 9b9d2aff8de4d499b4ba7ca406e000f8d3754ea7-alt [INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+9b9d2aff8de4d499b4ba7ca406e000f8d3754ea7-alt" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] started tweaking crates.io crate oysterpack_log 0.1.0 [INFO] finished tweaking crates.io crate oysterpack_log 0.1.0 [INFO] tweaked toml for crates.io crate oysterpack_log 0.1.0 written to work/builds/worker-3/source/Cargo.toml [INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+9b9d2aff8de4d499b4ba7ca406e000f8d3754ea7-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+9b9d2aff8de4d499b4ba7ca406e000f8d3754ea7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/mnt/big/crater/work/builds/worker-3/source:/opt/rustwide/workdir:ro,Z" "-v" "/mnt/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+9b9d2aff8de4d499b4ba7ca406e000f8d3754ea7-alt" "check" "--frozen" "--all" "--all-targets"` [INFO] [stdout] b31672eafda6497a0ffe562f9628b679e83af2b8415951aa3590da8db5475bdb [INFO] running `"docker" "start" "-a" "b31672eafda6497a0ffe562f9628b679e83af2b8415951aa3590da8db5475bdb"` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Compiling shell-escape v0.1.4 [INFO] [stderr] Compiling crossbeam-utils v0.5.0 [INFO] [stderr] Compiling home v0.3.4 [INFO] [stderr] Compiling dot v0.1.4 [INFO] [stderr] Compiling rustc-workspace-hack v1.0.0 [INFO] [stderr] Checking oysterpack_macros v0.1.0 [INFO] [stderr] Compiling itertools v0.5.10 [INFO] [stderr] Compiling crossbeam-channel v0.3.9 [INFO] [stderr] Compiling syntex_errors v0.58.1 [INFO] [stderr] Compiling bstr v0.2.8 [INFO] [stderr] Compiling tar v0.4.26 [INFO] [stderr] Compiling libssh2-sys v0.2.12 [INFO] [stderr] Compiling curl-sys v0.4.22 [INFO] [stderr] Compiling curl v0.4.24 [INFO] [stderr] Compiling crypto-hash v0.3.4 [INFO] [stderr] Compiling log v0.4.8 [INFO] [stderr] Compiling serde_ignored v0.0.4 [INFO] [stderr] Compiling toml v0.4.10 [INFO] [stderr] Compiling chrono v0.4.9 [INFO] [stderr] Compiling petgraph v0.4.13 [INFO] [stderr] Compiling libgit2-sys v0.7.11 [INFO] [stderr] Compiling globset v0.4.4 [INFO] [stderr] Compiling log v0.3.9 [INFO] [stderr] Compiling jobserver v0.1.17 [INFO] [stderr] Compiling env_logger v0.5.13 [INFO] [stderr] Checking version-sync v0.5.0 [INFO] [stderr] Compiling rustfix v0.4.6 [INFO] [stderr] Compiling git2 v0.7.5 [INFO] [stderr] Checking fern v0.5.8 [INFO] [stderr] Compiling crates-io v0.18.0 [INFO] [stderr] Compiling syntex_syntax v0.58.1 [INFO] [stderr] Compiling ignore v0.4.10 [INFO] [stderr] Compiling git2-curl v0.8.2 [INFO] [stderr] Compiling built v0.3.0 [INFO] [stderr] Compiling cargo v0.30.0 [INFO] [stderr] Compiling mml v0.1.41 [INFO] [stderr] Compiling oysterpack_app_metadata v0.3.1 [INFO] [stderr] Compiling oysterpack_built v0.3.2 [INFO] [stderr] Checking oysterpack_app_metadata_macros v0.1.0 [INFO] [stderr] Compiling oysterpack_log v0.1.0 (/opt/rustwide/workdir) [INFO] [stderr] error: failed to run custom build command for `oysterpack_log v0.1.0 (/opt/rustwide/workdir)` [INFO] [stderr] [INFO] [stderr] Caused by: [INFO] [stderr] process didn't exit successfully: `/opt/rustwide/target/debug/build/oysterpack_log-1d7d01d91f6dfcb4/build-script-build` (exit code: 101) [INFO] [stderr] --- stderr [INFO] [stderr] thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: Os { code: 30, kind: Other, message: "Read-only file system" } [INFO] [stderr] [INFO] [stderr] stack backtrace: [INFO] [stderr] 0: failure::backtrace::internal::InternalBacktrace::new [INFO] [stderr] at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/failure-0.1.5/src/backtrace/internal.rs:44 [INFO] [stderr] 1: failure::backtrace::Backtrace::new [INFO] [stderr] at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/failure-0.1.5/src/backtrace/mod.rs:111 [INFO] [stderr] 2: >::from [INFO] [stderr] at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/failure-0.1.5/src/error/error_impl.rs:19 [INFO] [stderr] 3: >::from [INFO] [stderr] at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/failure-0.1.5/src/error/mod.rs:36 [INFO] [stderr] 4: >::into [INFO] [stderr] at /rustc/9b9d2aff8de4d499b4ba7ca406e000f8d3754ea7/src/libcore/convert.rs:547 [INFO] [stderr] 5: as cargo::util::errors::CargoResultExt>::chain_err::{{closure}} [INFO] [stderr] at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/cargo-0.30.0/src/cargo/util/errors.rs:31 [INFO] [stderr] 6: core::result::Result::map_err [INFO] [stderr] at /rustc/9b9d2aff8de4d499b4ba7ca406e000f8d3754ea7/src/libcore/result.rs:574 [INFO] [stderr] 7: as cargo::util::errors::CargoResultExt>::chain_err [INFO] [stderr] at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/cargo-0.30.0/src/cargo/util/errors.rs:30 [INFO] [stderr] 8: cargo::util::flock::Filesystem::open [INFO] [stderr] at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/cargo-0.30.0/src/cargo/util/flock.rs:211 [INFO] [stderr] 9: cargo::util::flock::Filesystem::open_rw [INFO] [stderr] at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/cargo-0.30.0/src/cargo/util/flock.rs:167 [INFO] [stderr] 10: ::update_index [INFO] [stderr] at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/cargo-0.30.0/src/cargo/sources/registry/remote.rs:194 [INFO] [stderr] 11: cargo::sources::registry::RegistrySource::do_update [INFO] [stderr] at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/cargo-0.30.0/src/cargo/sources/registry/mod.rs:449 [INFO] [stderr] 12: ::query [INFO] [stderr] at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/cargo-0.30.0/src/cargo/sources/registry/mod.rs:476 [INFO] [stderr] 13: ::query [INFO] [stderr] at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/cargo-0.30.0/src/cargo/core/registry.rs:491 [INFO] [stderr] 14: cargo::core::resolver::types::RegistryQueryer::query [INFO] [stderr] at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/cargo-0.30.0/src/cargo/core/resolver/types.rs:49 [INFO] [stderr] 15: cargo::core::resolver::context::Context::build_deps::{{closure}} [INFO] [stderr] at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/cargo-0.30.0/src/cargo/core/resolver/context.rs:115 [INFO] [stderr] 16: core::iter::adapters::map_try_fold::{{closure}} [INFO] [stderr] at /rustc/9b9d2aff8de4d499b4ba7ca406e000f8d3754ea7/src/libcore/iter/adapters/mod.rs:701 [INFO] [stderr] 17: core::iter::traits::iterator::Iterator::try_fold [INFO] [stderr] at /rustc/9b9d2aff8de4d499b4ba7ca406e000f8d3754ea7/src/libcore/iter/traits/iterator.rs:1694 [INFO] [stderr] 18: as core::iter::traits::iterator::Iterator>::try_fold [INFO] [stderr] at /rustc/9b9d2aff8de4d499b4ba7ca406e000f8d3754ea7/src/libcore/iter/adapters/mod.rs:721 [INFO] [stderr] 19: as core::iter::traits::iterator::Iterator>::try_fold [INFO] [stderr] at /rustc/9b9d2aff8de4d499b4ba7ca406e000f8d3754ea7/src/libcore/iter/adapters/mod.rs:2425 [INFO] [stderr] 20: core::iter::traits::iterator::Iterator::try_for_each [INFO] [stderr] at /rustc/9b9d2aff8de4d499b4ba7ca406e000f8d3754ea7/src/libcore/iter/traits/iterator.rs:1736 [INFO] [stderr] 21: core::iter::traits::iterator::Iterator::find [INFO] [stderr] at /rustc/9b9d2aff8de4d499b4ba7ca406e000f8d3754ea7/src/libcore/iter/traits/iterator.rs:1982 [INFO] [stderr] 22: as core::iter::traits::iterator::Iterator>::next [INFO] [stderr] at /rustc/9b9d2aff8de4d499b4ba7ca406e000f8d3754ea7/src/libcore/iter/adapters/mod.rs:2407 [INFO] [stderr] 23: as alloc::vec::SpecExtend>::from_iter [INFO] [stderr] at /rustc/9b9d2aff8de4d499b4ba7ca406e000f8d3754ea7/src/liballoc/vec.rs:1923 [INFO] [stderr] 24: as core::iter::traits::collect::FromIterator>::from_iter [INFO] [stderr] at /rustc/9b9d2aff8de4d499b4ba7ca406e000f8d3754ea7/src/liballoc/vec.rs:1836 [INFO] [stderr] 25: core::iter::traits::iterator::Iterator::collect [INFO] [stderr] at /rustc/9b9d2aff8de4d499b4ba7ca406e000f8d3754ea7/src/libcore/iter/traits/iterator.rs:1478 [INFO] [stderr] 26: as core::iter::traits::collect::FromIterator>>::from_iter::{{closure}} [INFO] [stderr] at /rustc/9b9d2aff8de4d499b4ba7ca406e000f8d3754ea7/src/libcore/result.rs:1427 [INFO] [stderr] 27: core::iter::adapters::process_results [INFO] [stderr] at /rustc/9b9d2aff8de4d499b4ba7ca406e000f8d3754ea7/src/libcore/iter/adapters/mod.rs:2397 [INFO] [stderr] 28: as core::iter::traits::collect::FromIterator>>::from_iter [INFO] [stderr] at /rustc/9b9d2aff8de4d499b4ba7ca406e000f8d3754ea7/src/libcore/result.rs:1427 [INFO] [stderr] 29: core::iter::traits::iterator::Iterator::collect [INFO] [stderr] at /rustc/9b9d2aff8de4d499b4ba7ca406e000f8d3754ea7/src/libcore/iter/traits/iterator.rs:1478 [INFO] [stderr] 30: cargo::core::resolver::context::Context::build_deps [INFO] [stderr] at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/cargo-0.30.0/src/cargo/core/resolver/context.rs:112 [INFO] [stderr] 31: cargo::core::resolver::activate [INFO] [stderr] at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/cargo-0.30.0/src/cargo/core/resolver/mod.rs:655 [INFO] [stderr] 32: cargo::core::resolver::activate_deps_loop [INFO] [stderr] at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/cargo-0.30.0/src/cargo/core/resolver/mod.rs:194 [INFO] [stderr] 33: cargo::core::resolver::resolve [INFO] [stderr] at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/cargo-0.30.0/src/cargo/core/resolver/mod.rs:124 [INFO] [stderr] 34: cargo::ops::resolve::resolve_with_previous [INFO] [stderr] at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/cargo-0.30.0/src/cargo/ops/resolve.rs:325 [INFO] [stderr] 35: cargo::ops::resolve::resolve_with_registry [INFO] [stderr] at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/cargo-0.30.0/src/cargo/ops/resolve.rs:110 [INFO] [stderr] 36: cargo::ops::resolve::resolve_ws [INFO] [stderr] at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/cargo-0.30.0/src/cargo/ops/resolve.rs:18 [INFO] [stderr] 37: oysterpack_built::build_time::resolve [INFO] [stderr] at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/oysterpack_built-0.3.2/src/build_time/mod.rs:341 [INFO] [stderr] 38: oysterpack_built::build_time::build_dependency_graph [INFO] [stderr] at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/oysterpack_built-0.3.2/src/build_time/mod.rs:208 [INFO] [stderr] 39: oysterpack_built::build_time::run::{{closure}} [INFO] [stderr] at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/oysterpack_built-0.3.2/src/build_time/mod.rs:119 [INFO] [stderr] 40: oysterpack_built::build_time::run [INFO] [stderr] at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/oysterpack_built-0.3.2/src/build_time/mod.rs:143 [INFO] [stderr] 41: build_script_build::main [INFO] [stderr] at build.rs:20 [INFO] [stderr] 42: std::rt::lang_start::{{closure}} [INFO] [stderr] at /rustc/9b9d2aff8de4d499b4ba7ca406e000f8d3754ea7/src/libstd/rt.rs:64 [INFO] [stderr] 43: std::rt::lang_start_internal::{{closure}} [INFO] [stderr] at src/libstd/rt.rs:49 [INFO] [stderr] std::panicking::try::do_call [INFO] [stderr] at src/libstd/panicking.rs:292 [INFO] [stderr] 44: __rust_maybe_catch_panic [INFO] [stderr] at src/libpanic_unwind/lib.rs:80 [INFO] [stderr] 45: std::panicking::try [INFO] [stderr] at src/libstd/panicking.rs:271 [INFO] [stderr] std::panic::catch_unwind [INFO] [stderr] at src/libstd/panic.rs:394 [INFO] [stderr] std::rt::lang_start_internal [INFO] [stderr] at src/libstd/rt.rs:48 [INFO] [stderr] 46: std::rt::lang_start [INFO] [stderr] at /rustc/9b9d2aff8de4d499b4ba7ca406e000f8d3754ea7/src/libstd/rt.rs:64 [INFO] [stderr] 47: main [INFO] [stderr] 48: __libc_start_main [INFO] [stderr] 49: _start [INFO] [stderr] [INFO] [stderr] [INFO] [stderr] failed to open: /opt/rustwide/cargo-home/registry/index/github.com-1ecc6299db9ec823/.cargo-index-lock', src/libcore/result.rs:1165:5 [INFO] [stderr] stack backtrace: [INFO] [stderr] 0: 0x55f1a5c6fdf4 - backtrace::backtrace::libunwind::trace::h3c777145747bb537 [INFO] [stderr] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.37/src/backtrace/libunwind.rs:88 [INFO] [stderr] 1: 0x55f1a5c6fdf4 - backtrace::backtrace::trace_unsynchronized::h66b9e4a5d8dcdac1 [INFO] [stderr] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.37/src/backtrace/mod.rs:66 [INFO] [stderr] 2: 0x55f1a5c6fdf4 - std::sys_common::backtrace::_print_fmt::h67af8761982571ce [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:76 [INFO] [stderr] 3: 0x55f1a5c6fdf4 - ::fmt::hd2414c318764e035 [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:60 [INFO] [stderr] 4: 0x55f1a5c9718c - core::fmt::write::h6b1d9e7d0caf83ef [INFO] [stderr] at src/libcore/fmt/mod.rs:1030 [INFO] [stderr] 5: 0x55f1a5c6b717 - std::io::Write::write_fmt::h7d23ef4c2e86d894 [INFO] [stderr] at src/libstd/io/mod.rs:1412 [INFO] [stderr] 6: 0x55f1a5c73365 - std::sys_common::backtrace::_print::h95f9ce51820bb860 [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:64 [INFO] [stderr] 7: 0x55f1a5c73365 - std::sys_common::backtrace::print::h60cdacab02cba05c [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:49 [INFO] [stderr] 8: 0x55f1a5c73365 - std::panicking::default_hook::{{closure}}::hd6f0e16d93b9b5c8 [INFO] [stderr] at src/libstd/panicking.rs:196 [INFO] [stderr] 9: 0x55f1a5c73056 - std::panicking::default_hook::hd45736b469c8d928 [INFO] [stderr] at src/libstd/panicking.rs:210 [INFO] [stderr] 10: 0x55f1a5c73a65 - std::panicking::rust_panic_with_hook::hcc17bc0996b76a4c [INFO] [stderr] at src/libstd/panicking.rs:473 [INFO] [stderr] 11: 0x55f1a5c73602 - std::panicking::continue_panic_fmt::hacd60ce981312f06 [INFO] [stderr] at src/libstd/panicking.rs:380 [INFO] [stderr] 12: 0x55f1a5c734f6 - rust_begin_unwind [INFO] [stderr] at src/libstd/panicking.rs:307 [INFO] [stderr] 13: 0x55f1a5c9389a - core::panicking::panic_fmt::h1ebeaa41bf98abea [INFO] [stderr] at src/libcore/panicking.rs:85 [INFO] [stderr] 14: 0x55f1a5c93997 - core::result::unwrap_failed::h231e9151bc35c4cf [INFO] [stderr] at src/libcore/result.rs:1165 [INFO] [stderr] 15: 0x55f1a4ea5b8e - core::result::Result::unwrap::h1da9ad70e9ad757d [INFO] [stderr] at /rustc/9b9d2aff8de4d499b4ba7ca406e000f8d3754ea7/src/libcore/result.rs:933 [INFO] [stderr] 16: 0x55f1a4e81bd4 - oysterpack_built::build_time::build_dependency_graph::h470cfc04c02e5b75 [INFO] [stderr] at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/oysterpack_built-0.3.2/src/build_time/mod.rs:208 [INFO] [stderr] 17: 0x55f1a4e80bd1 - oysterpack_built::build_time::run::{{closure}}::h00320f66cd0f25cf [INFO] [stderr] at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/oysterpack_built-0.3.2/src/build_time/mod.rs:119 [INFO] [stderr] 18: 0x55f1a4e80958 - oysterpack_built::build_time::run::h1f820995d4fe466f [INFO] [stderr] at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/oysterpack_built-0.3.2/src/build_time/mod.rs:143 [INFO] [stderr] 19: 0x55f1a4e80587 - build_script_build::main::h51f626597361c7df [INFO] [stderr] at /opt/rustwide/workdir/build.rs:20 [INFO] [stderr] 20: 0x55f1a4e806f0 - std::rt::lang_start::{{closure}}::hc8ee511c4ef8d788 [INFO] [stderr] at /rustc/9b9d2aff8de4d499b4ba7ca406e000f8d3754ea7/src/libstd/rt.rs:64 [INFO] [stderr] 21: 0x55f1a5c73493 - std::rt::lang_start_internal::{{closure}}::h677067c06c8055b2 [INFO] [stderr] at src/libstd/rt.rs:49 [INFO] [stderr] 22: 0x55f1a5c73493 - std::panicking::try::do_call::h02b31030ec0cae5e [INFO] [stderr] at src/libstd/panicking.rs:292 [INFO] [stderr] 23: 0x55f1a5c7b2ca - __rust_maybe_catch_panic [INFO] [stderr] at src/libpanic_unwind/lib.rs:80 [INFO] [stderr] 24: 0x55f1a5c7401d - std::panicking::try::h3d608dc302373513 [INFO] [stderr] at src/libstd/panicking.rs:271 [INFO] [stderr] 25: 0x55f1a5c7401d - std::panic::catch_unwind::hbd3bc0654419de57 [INFO] [stderr] at src/libstd/panic.rs:394 [INFO] [stderr] 26: 0x55f1a5c7401d - std::rt::lang_start_internal::hb18b97680fa7fcd0 [INFO] [stderr] at src/libstd/rt.rs:48 [INFO] [stderr] 27: 0x55f1a4e806c9 - std::rt::lang_start::h874fc6d574611cc6 [INFO] [stderr] at /rustc/9b9d2aff8de4d499b4ba7ca406e000f8d3754ea7/src/libstd/rt.rs:64 [INFO] [stderr] 28: 0x55f1a4e805ba - main [INFO] [stderr] 29: 0x7f4dd1e37b97 - __libc_start_main [INFO] [stderr] 30: 0x55f1a4e8048a - _start [INFO] [stderr] 31: 0x0 - [INFO] [stderr] [INFO] running `"docker" "inspect" "b31672eafda6497a0ffe562f9628b679e83af2b8415951aa3590da8db5475bdb"` [INFO] running `"docker" "rm" "-f" "b31672eafda6497a0ffe562f9628b679e83af2b8415951aa3590da8db5475bdb"` [INFO] [stdout] b31672eafda6497a0ffe562f9628b679e83af2b8415951aa3590da8db5475bdb