[INFO] fetching crate tinymist-core 0.13.43... [INFO] testing tinymist-core-0.13.43 against master#562dee4820c458d823175268e41601d4c060588a for pr-154210-2 [INFO] extracting crate tinymist-core 0.13.43 into /workspace/builds/worker-7-tc1/source [INFO] started tweaking crates.io crate tinymist-core 0.13.43 [INFO] finished tweaking crates.io crate tinymist-core 0.13.43 [INFO] tweaked toml for crates.io crate tinymist-core 0.13.43 written to /workspace/builds/worker-7-tc1/source/Cargo.toml [INFO] validating manifest of crates.io crate tinymist-core 0.13.43 on toolchain 562dee4820c458d823175268e41601d4c060588a [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate crates.io crate tinymist-core 0.13.43 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" "+562dee4820c458d823175268e41601d4c060588a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Updating crates.io index [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded multi-stash v0.2.0 [INFO] [stderr] Downloaded fast-srgb8 v1.0.0 [INFO] [stderr] Downloaded tinymist-l10n v0.13.30 [INFO] [stderr] Downloaded zerotrie v0.1.3 [INFO] [stderr] Downloaded psm v0.1.28 [INFO] [stderr] Downloaded pixglyph v0.5.1 [INFO] [stderr] Downloaded stacker v0.1.22 [INFO] [stderr] Downloaded reflexo-typst2vec v0.6.1-rc3 [INFO] [stderr] Downloaded reflexo v0.6.1-rc3 [INFO] [stderr] Downloaded tinymist-project v0.13.30 [INFO] [stderr] Downloaded tinymist-package v0.13.30 [INFO] [stderr] Downloaded palette v0.7.6 [INFO] [stderr] Downloaded read-fonts v0.35.0 [INFO] [stderr] Downloaded typst-pdf v0.13.1 [INFO] [stderr] Downloaded pxfm v0.1.27 [INFO] [stderr] Downloaded image v0.25.9 [INFO] [stderr] Downloaded typst-html v0.13.1 [INFO] [stderr] Downloaded mutate_once v0.1.2 [INFO] [stderr] Downloaded skrifa v0.37.0 [INFO] [stderr] Downloaded zune-jpeg v0.5.9 [INFO] [stderr] Downloaded unicode-ccc v0.3.0 [INFO] [stderr] Downloaded lsp-types v0.95.0 [INFO] [stderr] Downloaded gif v0.14.1 [INFO] [stderr] Downloaded rustybuzz v0.18.0 [INFO] [stderr] Downloaded ecow v0.2.6 [INFO] [stderr] Downloaded wasmparser v0.221.3 [INFO] [stderr] Downloaded icu_segmenter_data v1.5.1 [INFO] [stderr] Downloaded write-fonts v0.43.0 [INFO] [stderr] Downloaded simplecss v0.2.2 [INFO] [stderr] Downloaded by_address v1.2.1 [INFO] [stderr] Downloaded comemo-macros v0.4.0 [INFO] [stderr] Downloaded typst-macros v0.13.1 [INFO] [stderr] Downloaded unscanny v0.1.0 [INFO] [stderr] Downloaded roxmltree v0.20.0 [INFO] [stderr] Downloaded xmp-writer v0.3.2 [INFO] [stderr] Downloaded tinymist-task v0.13.30 [INFO] [stderr] Downloaded typst-shim v0.13.30 [INFO] [stderr] Downloaded tinymist-vfs v0.13.30 [INFO] [stderr] Downloaded hypher v0.1.6 [INFO] [stderr] Downloaded citationberg v0.5.0 [INFO] [stderr] Downloaded fontdb v0.21.0 [INFO] [stderr] Downloaded rust_decimal v1.40.0 [INFO] [stderr] Downloaded typst-library v0.13.1 [INFO] [stderr] Downloaded wasmi_core v0.40.0 [INFO] [stderr] Downloaded unicode-script v0.5.8 [INFO] [stderr] Downloaded ttf-parser v0.24.1 [INFO] [stderr] Downloaded typst-timing v0.13.1 [INFO] [stderr] Downloaded wasmi v0.40.0 [INFO] [stderr] Downloaded typst v0.13.1 [INFO] [stderr] Downloaded tinymist-world v0.13.30 [INFO] [stderr] Downloaded tinymist-std v0.13.30 [INFO] [stderr] Downloaded typst-assets v0.13.1 [INFO] [stderr] Downloaded codex v0.1.1 [INFO] [stderr] Downloaded hayagriva v0.8.1 [INFO] [stderr] Downloaded kurbo v0.11.3 [INFO] [stderr] Downloaded fancy-regex v0.16.2 [INFO] [stderr] Downloaded usvg v0.43.0 [INFO] [stderr] Downloaded typst-syntax v0.13.1 [INFO] [stderr] Downloaded typst-layout v0.13.1 [INFO] [stderr] Downloaded moxcms v0.7.11 [INFO] [stderr] Downloaded lipsum v0.9.1 [INFO] [stderr] Downloaded wasmi_ir v0.40.0 [INFO] [stderr] Downloaded typst-realize v0.13.1 [INFO] [stderr] Downloaded kurbo v0.12.0 [INFO] [stderr] Downloaded svg2pdf v0.12.0 [INFO] [stderr] Downloaded schemars v1.2.0 [INFO] [stderr] Downloaded typst-svg v0.13.1 [INFO] [stderr] Downloaded comemo v0.4.0 [INFO] [stderr] Downloaded numerals v0.1.4 [INFO] [stderr] Downloaded tinymist-derive v0.13.30 [INFO] [stderr] Downloaded pdf-writer v0.12.1 [INFO] [stderr] Downloaded icu_provider_blob v1.5.0 [INFO] [stderr] Downloaded qcms v0.3.0 [INFO] [stderr] Downloaded unicode-bidi-mirroring v0.3.0 [INFO] [stderr] Downloaded xmlwriter v0.1.0 [INFO] [stderr] Downloaded unicode-math-class v0.1.0 [INFO] [stderr] Downloaded typst-utils v0.13.1 [INFO] [stderr] Downloaded font-types v0.10.1 [INFO] [stderr] Downloaded image-webp v0.1.3 [INFO] [stderr] Downloaded resvg v0.43.0 [INFO] [stderr] Downloaded tiny-skia v0.11.4 [INFO] [stderr] Downloaded typst-render v0.13.1 [INFO] [stderr] Downloaded typst-eval v0.13.1 [INFO] [stderr] Downloaded biblatex v0.10.0 [INFO] [stderr] Downloaded zune-core v0.5.1 [INFO] [stderr] Downloaded fontconfig-parser v0.5.8 [INFO] [stderr] Downloaded strict-num v0.1.1 [INFO] [stderr] Downloaded vergen v8.3.2 [INFO] [stderr] Downloaded subsetter v0.2.3 [INFO] [stderr] Downloaded ar_archive_writer v0.2.0 [INFO] [stderr] Downloaded palette_derive v0.7.6 [INFO] [stderr] Downloaded core_maths v0.1.1 [INFO] [stderr] Downloaded tiny-skia-path v0.11.4 [INFO] [stderr] Downloaded unicode-vo v0.1.0 [INFO] [stderr] Downloaded string-interner v0.18.0 [INFO] [stderr] Downloaded chinese-number v0.7.8 [INFO] [stderr] Downloaded wasmi_collections v0.40.0 [INFO] [stderr] Downloaded icu_provider_adapters v1.5.0 [INFO] [stderr] Downloaded kamadak-exif v0.6.1 [INFO] [stderr] Downloaded chinese-variant v1.1.5 [INFO] [stderr] Downloaded svgtypes v0.15.3 [INFO] [stderr] Downloaded thin-vec v0.2.14 [INFO] [stderr] Downloaded data-url v0.3.2 [INFO] [stderr] Downloaded imagesize v0.13.0 [INFO] [stderr] Downloaded two-face v0.4.5 [INFO] [stderr] Downloaded icu_segmenter v1.5.0 [INFO] [stderr] Downloaded reflexo-typst v0.6.1-rc3 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 0f8d7ed200e9ad6b95e1f1d6dc7ff2b5d141273c5c24816ccd83b50cffcbca58 [INFO] running `Command { std: "docker" "start" "-a" "0f8d7ed200e9ad6b95e1f1d6dc7ff2b5d141273c5c24816ccd83b50cffcbca58", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "0f8d7ed200e9ad6b95e1f1d6dc7ff2b5d141273c5c24816ccd83b50cffcbca58", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "0f8d7ed200e9ad6b95e1f1d6dc7ff2b5d141273c5c24816ccd83b50cffcbca58", kill_on_drop: false }` [INFO] [stdout] 0f8d7ed200e9ad6b95e1f1d6dc7ff2b5d141273c5c24816ccd83b50cffcbca58 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 1d282b4a689e5b27ec66531035ad6cb0495493bc74c6d09ab44ec960648a4bdb [INFO] running `Command { std: "docker" "start" "-a" "1d282b4a689e5b27ec66531035ad6cb0495493bc74c6d09ab44ec960648a4bdb", kill_on_drop: false }` [INFO] [stderr] Compiling proc-macro2 v1.0.105 [INFO] [stderr] Compiling quote v1.0.43 [INFO] [stderr] Compiling serde_core v1.0.228 [INFO] [stderr] Compiling libc v0.2.180 [INFO] [stderr] Compiling stable_deref_trait v1.2.1 [INFO] [stderr] Compiling memchr v2.7.6 [INFO] [stderr] Compiling smallvec v1.15.1 [INFO] [stderr] Compiling libm v0.2.15 [INFO] [stderr] Compiling zmij v1.0.14 [INFO] [stderr] Compiling simd-adler32 v0.3.8 [INFO] [stderr] Compiling thiserror v2.0.17 [INFO] [stderr] Compiling arrayvec v0.7.6 [INFO] [stderr] Compiling regex-syntax v0.8.8 [INFO] [stderr] Compiling time-core v0.1.7 [INFO] [stderr] Compiling deranged v0.5.5 [INFO] [stderr] Compiling tinyvec v1.10.0 [INFO] [stderr] Compiling slotmap v1.1.1 [INFO] [stderr] Compiling miniz_oxide v0.8.9 [INFO] [stderr] Compiling fdeflate v0.3.7 [INFO] [stderr] Compiling float-cmp v0.9.0 [INFO] [stderr] Compiling unicode-script v0.5.8 [INFO] [stderr] Compiling strict-num v0.1.1 [INFO] [stderr] Compiling zerocopy v0.8.33 [INFO] [stderr] Compiling roxmltree v0.20.0 [INFO] [stderr] Compiling ryu v1.0.22 [INFO] [stderr] Compiling aho-corasick v1.1.4 [INFO] [stderr] Compiling color_quant v1.1.0 [INFO] [stderr] Compiling weezl v0.1.12 [INFO] [stderr] Compiling flate2 v1.1.8 [INFO] [stderr] Compiling fontconfig-parser v0.5.8 [INFO] [stderr] Compiling kurbo v0.11.3 [INFO] [stderr] Compiling time-macros v0.2.25 [INFO] [stderr] Compiling unicode-ccc v0.3.0 [INFO] [stderr] Compiling unicode-properties v0.1.4 [INFO] [stderr] Compiling portable-atomic v1.13.0 [INFO] [stderr] Compiling bit-vec v0.8.0 [INFO] [stderr] Compiling unicode-bidi-mirroring v0.3.0 [INFO] [stderr] Compiling byteorder-lite v0.1.0 [INFO] [stderr] Compiling syn v2.0.114 [INFO] [stderr] Compiling bit-set v0.8.0 [INFO] [stderr] Compiling rand v0.8.5 [INFO] [stderr] Compiling png v0.17.16 [INFO] [stderr] Compiling quick-xml v0.38.4 [INFO] [stderr] Compiling parking_lot_core v0.9.12 [INFO] [stderr] Compiling memmap2 v0.9.9 [INFO] [stderr] Compiling simplecss v0.2.2 [INFO] [stderr] Compiling core_maths v0.1.1 [INFO] [stderr] Compiling parking_lot v0.12.5 [INFO] [stderr] Compiling pxfm v0.1.27 [INFO] [stderr] Compiling ttf-parser v0.24.1 [INFO] [stderr] Compiling svgtypes v0.15.3 [INFO] [stderr] Compiling phf_shared v0.11.3 [INFO] [stderr] Compiling time v0.3.45 [INFO] [stderr] Compiling half v2.6.0 [INFO] [stderr] Compiling pico-args v0.5.0 [INFO] [stderr] Compiling rand_core v0.6.4 [INFO] [stderr] Compiling unscanny v0.1.0 [INFO] [stderr] Compiling regex-automata v0.4.13 [INFO] [stderr] Compiling zune-core v0.5.1 [INFO] [stderr] Compiling xmlwriter v0.1.0 [INFO] [stderr] Compiling imagesize v0.13.0 [INFO] [stderr] Compiling wasmparser v0.221.3 [INFO] [stderr] Compiling unicode-vo v0.1.0 [INFO] [stderr] Compiling bitflags v2.10.0 [INFO] [stderr] Compiling indexmap v2.13.0 [INFO] [stderr] Compiling serde_json v1.0.149 [INFO] [stderr] Compiling downcast-rs v1.2.1 [INFO] [stderr] Compiling linked-hash-map v0.5.6 [INFO] [stderr] Compiling data-url v0.3.2 [INFO] [stderr] Compiling ciborium-ll v0.2.2 [INFO] [stderr] Compiling ppv-lite86 v0.2.21 [INFO] [stderr] Compiling wasmi_core v0.40.0 [INFO] [stderr] Compiling png v0.18.0 [INFO] [stderr] Compiling yaml-rust v0.4.5 [INFO] [stderr] Compiling zune-jpeg v0.5.9 [INFO] [stderr] Compiling phf_generator v0.11.3 [INFO] [stderr] Compiling gif v0.14.1 [INFO] [stderr] Compiling unicode-normalization v0.1.25 [INFO] [stderr] Compiling num-integer v0.1.46 [INFO] [stderr] Compiling az v1.2.1 [INFO] [stderr] Compiling synstructure v0.13.2 [INFO] [stderr] Compiling fontdb v0.21.0 [INFO] [stderr] Compiling numerals v0.1.4 [INFO] [stderr] Compiling unsafe-libyaml v0.2.11 [INFO] [stderr] Compiling moxcms v0.7.11 [INFO] [stderr] Compiling rust_decimal v1.40.0 [INFO] [stderr] Compiling thin-vec v0.2.14 [INFO] [stderr] Compiling by_address v1.2.1 [INFO] [stderr] Compiling codex v0.1.1 [INFO] [stderr] Compiling unicode-math-class v0.1.0 [INFO] [stderr] Compiling palette v0.7.6 [INFO] [stderr] Compiling num-bigint v0.4.6 [INFO] [stderr] Compiling typst-utils v0.13.1 [INFO] [stderr] Compiling wasmi_ir v0.40.0 [INFO] [stderr] Compiling rand_chacha v0.3.1 [INFO] [stderr] Compiling csv-core v0.1.13 [INFO] [stderr] Compiling approx v0.5.1 [INFO] [stderr] Compiling spin v0.9.8 [INFO] [stderr] Compiling wasmi_collections v0.40.0 [INFO] [stderr] Compiling chinese-variant v1.1.5 [INFO] [stderr] Compiling fast-srgb8 v1.0.0 [INFO] [stderr] Compiling multi-stash v0.2.0 [INFO] [stderr] Compiling mutate_once v0.1.2 [INFO] [stderr] Compiling csv v1.4.0 [INFO] [stderr] Compiling kamadak-exif v0.6.1 [INFO] [stderr] Compiling wasm-bindgen-shared v0.2.108 [INFO] [stderr] Compiling lipsum v0.9.1 [INFO] [stderr] Compiling typed-arena v2.0.2 [INFO] [stderr] Compiling bumpalo v3.19.1 [INFO] [stderr] Compiling find-msvc-tools v0.1.8 [INFO] [stderr] Compiling qcms v0.3.0 [INFO] [stderr] Compiling typst-assets v0.13.1 [INFO] [stderr] Compiling object v0.32.2 [INFO] [stderr] Compiling cc v1.2.53 [INFO] [stderr] Compiling syn v1.0.109 [INFO] [stderr] Compiling serde_derive v1.0.228 [INFO] [stderr] Compiling zerofrom-derive v0.1.6 [INFO] [stderr] Compiling displaydoc v0.2.5 [INFO] [stderr] Compiling yoke-derive v0.8.1 [INFO] [stderr] Compiling zerovec-derive v0.11.2 [INFO] [stderr] Compiling bytemuck_derive v1.10.2 [INFO] [stderr] Compiling yoke-derive v0.7.5 [INFO] [stderr] Compiling thiserror-impl v2.0.17 [INFO] [stderr] Compiling zerovec-derive v0.10.3 [INFO] [stderr] Compiling icu_provider_macros v1.5.0 [INFO] [stderr] Compiling thiserror-impl v1.0.69 [INFO] [stderr] Compiling strum_macros v0.26.4 [INFO] [stderr] Compiling fancy-regex v0.16.2 [INFO] [stderr] Compiling enum-ordinalize-derive v4.3.2 [INFO] [stderr] Compiling zerofrom v0.1.6 [INFO] [stderr] Compiling phf_macros v0.11.3 [INFO] [stderr] Compiling yoke v0.8.1 [INFO] [stderr] Compiling bytemuck v1.24.0 [INFO] [stderr] Compiling zerovec v0.11.5 [INFO] [stderr] error: could not compile `regex-automata` (lib) [INFO] [stderr] [INFO] [stderr] Caused by: [INFO] [stderr] process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/562dee4820c458d823175268e41601d4c060588a/bin/rustc --crate-name regex_automata --edition=2021 /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/regex-automata-0.4.13/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 -C debuginfo=2 --allow=unexpected_cfgs --check-cfg 'cfg(docsrs_regex)' --cfg 'feature="alloc"' --cfg 'feature="dfa"' --cfg 'feature="dfa-build"' --cfg 'feature="dfa-onepass"' --cfg 'feature="dfa-search"' --cfg 'feature="hybrid"' --cfg 'feature="meta"' --cfg 'feature="nfa"' --cfg 'feature="nfa-backtrack"' --cfg 'feature="nfa-pikevm"' --cfg 'feature="nfa-thompson"' --cfg 'feature="perf"' --cfg 'feature="perf-inline"' --cfg 'feature="perf-literal"' --cfg 'feature="perf-literal-multisubstring"' --cfg 'feature="perf-literal-substring"' --cfg 'feature="std"' --cfg 'feature="syntax"' --cfg 'feature="unicode"' --cfg 'feature="unicode-age"' --cfg 'feature="unicode-bool"' --cfg 'feature="unicode-case"' --cfg 'feature="unicode-gencat"' --cfg 'feature="unicode-perl"' --cfg 'feature="unicode-script"' --cfg 'feature="unicode-segment"' --cfg 'feature="unicode-word-boundary"' --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values("alloc", "default", "dfa", "dfa-build", "dfa-onepass", "dfa-search", "hybrid", "internal-instrument", "internal-instrument-pikevm", "logging", "meta", "nfa", "nfa-backtrack", "nfa-pikevm", "nfa-thompson", "perf", "perf-inline", "perf-literal", "perf-literal-multisubstring", "perf-literal-substring", "std", "syntax", "unicode", "unicode-age", "unicode-bool", "unicode-case", "unicode-gencat", "unicode-perl", "unicode-script", "unicode-segment", "unicode-word-boundary"))' -C metadata=7fe7ce2aacf85dad -C extra-filename=-80ec7d4f3dbce0b4 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern aho_corasick=/opt/rustwide/target/debug/deps/libaho_corasick-96707775b14d7c29.rmeta --extern memchr=/opt/rustwide/target/debug/deps/libmemchr-f9c66c7ba21bf873.rmeta --extern regex_syntax=/opt/rustwide/target/debug/deps/libregex_syntax-d40cde7d2fd22dd8.rmeta --cap-lints allow --cap-lints=forbid` (signal: 9, SIGKILL: kill) [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] running `Command { std: "docker" "inspect" "1d282b4a689e5b27ec66531035ad6cb0495493bc74c6d09ab44ec960648a4bdb", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "1d282b4a689e5b27ec66531035ad6cb0495493bc74c6d09ab44ec960648a4bdb", kill_on_drop: false }` [INFO] [stdout] 1d282b4a689e5b27ec66531035ad6cb0495493bc74c6d09ab44ec960648a4bdb