[INFO] cloning repository https://github.com/chklauser/noisedeck [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/chklauser/noisedeck" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchklauser%2Fnoisedeck", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchklauser%2Fnoisedeck'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 2effa24bafef239f40f7e8e20677d04f4db71c81 [INFO] checking chklauser/noisedeck against master#1fe72d35998dea48aeecaf7fc07783b0b553f24f for pr-154992-1 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchklauser%2Fnoisedeck" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'... [INFO] [stderr] done. [INFO] started tweaking git repo https://github.com/chklauser/noisedeck [INFO] finished tweaking git repo https://github.com/chklauser/noisedeck [INFO] tweaked toml for git repo https://github.com/chklauser/noisedeck written to /workspace/builds/worker-4-tc1/source/Cargo.toml [INFO] validating manifest of git repo https://github.com/chklauser/noisedeck on toolchain 1fe72d35998dea48aeecaf7fc07783b0b553f24f [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1fe72d35998dea48aeecaf7fc07783b0b553f24f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate git repo https://github.com/chklauser/noisedeck 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" "+1fe72d35998dea48aeecaf7fc07783b0b553f24f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Updating crates.io index [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded cfg-if v1.0.0 [INFO] [stderr] Downloaded zopfli v0.8.1 [INFO] [stderr] Downloaded crc32fast v1.4.2 [INFO] [stderr] Downloaded lockfree-object-pool v0.1.6 [INFO] [stderr] Downloaded zip v2.6.1 [INFO] [stderr] Downloaded autocfg v1.4.0 [INFO] [stderr] Downloaded windows-result v0.1.2 [INFO] [stderr] Downloaded tracing-core v0.1.33 [INFO] [stderr] Downloaded rawpointer v0.2.1 [INFO] [stderr] Downloaded send_wrapper v0.6.0 [INFO] [stderr] Downloaded yazi v0.2.1 [INFO] [stderr] Downloaded num_enum_derive v0.7.3 [INFO] [stderr] Downloaded lock_api v0.4.12 [INFO] [stderr] Downloaded ab_glyph_rasterizer v0.1.8 [INFO] [stderr] Downloaded num v0.4.3 [INFO] [stderr] Downloaded oboe v0.6.1 [INFO] [stderr] Downloaded bytemuck v1.22.0 [INFO] [stderr] Downloaded approx v0.5.1 [INFO] [stderr] Downloaded sys-locale v0.3.2 [INFO] [stderr] Downloaded elgato-streamdeck v0.9.2 [INFO] [stderr] Downloaded rtrb v0.3.2 [INFO] [stderr] Downloaded unicode-script v0.5.7 [INFO] [stderr] Downloaded zune-jpeg v0.4.14 [INFO] [stderr] Downloaded unicode-ccc v0.2.0 [INFO] [stderr] Downloaded hidapi v2.6.3 [INFO] [stderr] Downloaded assert_matches v1.5.0 [INFO] [stderr] Downloaded unicode-bidi-mirroring v0.2.0 [INFO] [stderr] Downloaded image v0.25.6 [INFO] [stderr] Downloaded memmap2 v0.9.5 [INFO] [stderr] Downloaded clap_derive v4.5.32 [INFO] [stderr] Downloaded clap v4.5.35 [INFO] [stderr] Downloaded swash v0.2.2 [INFO] [stderr] Downloaded fontdb v0.16.2 [INFO] [stderr] Downloaded roxmltree v0.20.0 [INFO] [stderr] Downloaded zeno v0.3.2 [INFO] [stderr] Downloaded zerocopy v0.8.24 [INFO] [stderr] Downloaded clap_builder v4.5.35 [INFO] [stderr] Downloaded skrifa v0.26.6 [INFO] [stderr] Downloaded ttf-parser v0.21.1 [INFO] [stderr] Downloaded ttf-parser v0.20.0 [INFO] [stderr] Downloaded fontconfig-parser v0.5.7 [INFO] [stderr] Downloaded nalgebra v0.32.6 [INFO] [stderr] Downloaded rustybuzz v0.14.1 [INFO] [stderr] Downloaded glam v0.29.3 [INFO] [stderr] Downloaded rangemap v1.5.1 [INFO] [stderr] Downloaded font-types v0.8.4 [INFO] [stderr] Downloaded read-fonts v0.25.3 [INFO] [stderr] Downloaded self_cell v1.1.0 [INFO] [stderr] Downloaded rustix v1.0.5 [INFO] [stderr] Downloaded libc v0.2.171 [INFO] [stderr] Downloaded tokio v1.44.1 [INFO] [stderr] Downloaded gimli v0.28.1 [INFO] [stderr] Downloaded r-efi v5.2.0 [INFO] [stderr] Downloaded cc v1.2.18 [INFO] [stderr] Downloaded syn v2.0.100 [INFO] [stderr] Downloaded rustversion v1.0.20 [INFO] [stderr] Downloaded backtrace v0.3.71 [INFO] [stderr] Downloaded base32 v0.5.1 [INFO] [stderr] Downloaded anstyle v1.0.10 [INFO] [stderr] Downloaded clap_lex v0.7.4 [INFO] [stderr] Downloaded errno v0.3.11 [INFO] [stderr] Downloaded terminal_size v0.4.2 [INFO] [stderr] Downloaded bindgen v0.70.1 [INFO] [stderr] Downloaded cpal v0.15.3 [INFO] [stderr] Downloaded imageproc v0.25.0 [INFO] [stderr] Downloaded symphonia-core v0.5.4 [INFO] [stderr] Downloaded triple_buffer v8.1.0 [INFO] [stderr] Downloaded simba v0.8.1 [INFO] [stderr] Downloaded getrandom v0.2.15 [INFO] [stderr] Downloaded winnow v0.7.4 [INFO] [stderr] Downloaded safe_arch v0.7.4 [INFO] [stderr] Downloaded toml_datetime v0.6.8 [INFO] [stderr] Downloaded adler v1.0.2 [INFO] [stderr] Downloaded miniz_oxide v0.7.4 [INFO] [stderr] Downloaded memchr v2.7.4 [INFO] [stderr] Downloaded owned_ttf_parser v0.25.0 [INFO] [stderr] Downloaded zune-core v0.4.12 [INFO] [stderr] Downloaded matrixmultiply v0.3.9 [INFO] [stderr] Downloaded num-complex v0.4.6 [INFO] [stderr] Downloaded zerocopy-derive v0.8.24 [INFO] [stderr] Downloaded alsa-sys v0.3.1 [INFO] [stderr] Downloaded coreaudio-rs v0.11.3 [INFO] [stderr] Downloaded mach2 v0.4.2 [INFO] [stderr] Downloaded oboe-sys v0.6.1 [INFO] [stderr] Downloaded symphonia-metadata v0.5.4 [INFO] [stderr] Downloaded stable-eyre v0.2.2 [INFO] [stderr] Downloaded addr2line v0.21.0 [INFO] [stderr] Downloaded mio v1.0.3 [INFO] [stderr] Downloaded num-rational v0.4.2 [INFO] [stderr] Downloaded mint v0.5.9 [INFO] [stderr] Downloaded rustc-demangle v0.1.24 [INFO] [stderr] Downloaded bitflags v2.9.0 [INFO] [stderr] Downloaded smallvec v1.15.0 [INFO] [stderr] Downloaded miniz_oxide v0.8.7 [INFO] [stderr] Downloaded bumpalo v3.17.0 [INFO] [stderr] Downloaded ab_glyph v0.2.29 [INFO] [stderr] Downloaded wide v0.7.32 [INFO] [stderr] Downloaded atomic-arena v0.1.2 [INFO] [stderr] Downloaded alsa v0.9.1 [INFO] [stderr] Downloaded libloading v0.8.6 [INFO] [stderr] Downloaded coreaudio-sys v0.2.16 [INFO] [stderr] Downloaded toml_edit v0.22.24 [INFO] [stderr] Downloaded num_enum v0.7.3 [INFO] [stderr] Downloaded libm v0.2.11 [INFO] [stderr] Downloaded cosmic-text v0.14.1 [INFO] [stderr] Downloaded symphonia-bundle-mp3 v0.5.4 [INFO] [stderr] Downloaded getrandom v0.3.2 [INFO] [stderr] Downloaded redox_syscall v0.5.10 [INFO] [stderr] Downloaded rand_distr v0.4.3 [INFO] [stderr] Downloaded windows-core v0.54.0 [INFO] [stderr] Downloaded wasi v0.11.0+wasi-snapshot-preview1 [INFO] [stderr] Downloaded arbitrary v1.4.1 [INFO] [stderr] Downloaded flate2 v1.1.1 [INFO] [stderr] Downloaded symphonia v0.5.4 [INFO] [stderr] Downloaded parking_lot_core v0.9.10 [INFO] [stderr] Downloaded tracing-attributes v0.1.28 [INFO] [stderr] Downloaded proc-macro2 v1.0.94 [INFO] [stderr] Downloaded bytemuck_derive v1.9.3 [INFO] [stderr] Downloaded parking_lot v0.12.3 [INFO] [stderr] Downloaded adler2 v2.0.0 [INFO] [stderr] Downloaded dasp_sample v0.11.0 [INFO] [stderr] Downloaded derive_arbitrary v1.4.1 [INFO] [stderr] Downloaded hashbrown v0.15.2 [INFO] [stderr] Downloaded signal-hook-registry v1.4.2 [INFO] [stderr] Downloaded thread_local v1.1.8 [INFO] [stderr] Downloaded uuid v1.16.0 [INFO] [stderr] Downloaded linux-raw-sys v0.9.3 [INFO] [stderr] Downloaded windows v0.54.0 [INFO] [stderr] Downloaded kira v0.10.4 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "+1fe72d35998dea48aeecaf7fc07783b0b553f24f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 3275b02c9f6fe921ab20a0f64415d04f4f7094f18b19ec1f2784a700a1f680e7 [INFO] running `Command { std: "docker" "start" "-a" "3275b02c9f6fe921ab20a0f64415d04f4f7094f18b19ec1f2784a700a1f680e7", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "3275b02c9f6fe921ab20a0f64415d04f4f7094f18b19ec1f2784a700a1f680e7", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "3275b02c9f6fe921ab20a0f64415d04f4f7094f18b19ec1f2784a700a1f680e7", kill_on_drop: false }` [INFO] [stdout] 3275b02c9f6fe921ab20a0f64415d04f4f7094f18b19ec1f2784a700a1f680e7 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "+1fe72d35998dea48aeecaf7fc07783b0b553f24f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] db4b82e1f272f56f25e2d64fb2ac34c6c25c43dcf6c2a90b3e46c83102adf81f [INFO] running `Command { std: "docker" "start" "-a" "db4b82e1f272f56f25e2d64fb2ac34c6c25c43dcf6c2a90b3e46c83102adf81f", kill_on_drop: false }` [INFO] [stderr] Compiling proc-macro2 v1.0.94 [INFO] [stderr] Checking cfg-if v1.0.0 [INFO] [stderr] Compiling libc v0.2.171 [INFO] [stderr] Compiling autocfg v1.4.0 [INFO] [stderr] Compiling libm v0.2.11 [INFO] [stderr] Checking simd-adler32 v0.3.7 [INFO] [stderr] Checking bitflags v1.3.2 [INFO] [stderr] Checking bitflags v2.9.0 [INFO] [stderr] Checking log v0.4.27 [INFO] [stderr] Checking memchr v2.7.4 [INFO] [stderr] Checking adler2 v2.0.0 [INFO] [stderr] Compiling zerocopy v0.8.24 [INFO] [stderr] Compiling cc v1.2.18 [INFO] [stderr] Checking smallvec v1.15.0 [INFO] [stderr] Compiling paste v1.0.15 [INFO] [stderr] Compiling alsa-sys v0.3.1 [INFO] [stderr] Checking crc32fast v1.4.2 [INFO] [stderr] Checking arrayvec v0.7.6 [INFO] [stderr] Compiling rustix v1.0.5 [INFO] [stderr] Checking miniz_oxide v0.8.7 [INFO] [stderr] Compiling parking_lot_core v0.9.10 [INFO] [stderr] Checking fdeflate v0.3.7 [INFO] [stderr] Compiling slotmap v1.0.7 [INFO] [stderr] Checking encoding_rs v0.8.35 [INFO] [stderr] Checking linux-raw-sys v0.9.3 [INFO] [stderr] Compiling crossbeam-utils v0.8.21 [INFO] [stderr] Checking zune-core v0.4.12 [INFO] [stderr] Compiling serde v1.0.219 [INFO] [stderr] Compiling num-traits v0.2.19 [INFO] [stderr] Compiling lock_api v0.4.12 [INFO] [stderr] Compiling matrixmultiply v0.3.9 [INFO] [stderr] Checking zune-jpeg v0.4.14 [INFO] [stderr] Checking aho-corasick v1.1.3 [INFO] [stderr] Checking flate2 v1.1.1 [INFO] [stderr] Checking adler v1.0.2 [INFO] [stderr] Checking roxmltree v0.20.0 [INFO] [stderr] Compiling cpal v0.15.3 [INFO] [stderr] Checking rawpointer v0.2.1 [INFO] [stderr] Compiling quote v1.0.40 [INFO] [stderr] Checking ttf-parser v0.25.1 [INFO] [stderr] Compiling syn v2.0.100 [INFO] [stderr] Checking png v0.17.16 [INFO] [stderr] Checking regex-syntax v0.8.5 [INFO] [stderr] Checking gimli v0.28.1 [INFO] [stderr] Compiling eyre v0.6.12 [INFO] [stderr] Checking byteorder-lite v0.1.0 [INFO] [stderr] Checking getrandom v0.2.15 [INFO] [stderr] Checking parking_lot v0.12.3 [INFO] [stderr] Checking fontconfig-parser v0.5.7 [INFO] [stderr] Checking rand_core v0.6.4 [INFO] [stderr] Checking mio v1.0.3 [INFO] [stderr] Checking memmap2 v0.9.5 [INFO] [stderr] Checking signal-hook-registry v1.4.2 [INFO] [stderr] Checking tinyvec v1.9.0 [INFO] [stderr] Checking alsa v0.9.1 [INFO] [stderr] Checking miniz_oxide v0.7.4 [INFO] [stderr] Checking num-integer v0.1.46 [INFO] [stderr] Checking num-complex v0.4.6 [INFO] [stderr] Checking approx v0.5.1 [INFO] [stderr] Checking terminal_size v0.4.2 [INFO] [stderr] Checking object v0.32.2 [INFO] [stderr] Checking tracing-core v0.1.33 [INFO] [stderr] Checking anstyle v1.0.10 [INFO] [stderr] Checking unicode-ccc v0.2.0 [INFO] [stderr] Checking clap_lex v0.7.4 [INFO] [stderr] Checking num-bigint v0.4.6 [INFO] [stderr] Checking num-iter v0.1.45 [INFO] [stderr] Checking ppv-lite86 v0.2.21 [INFO] [stderr] Checking indenter v0.3.3 [INFO] [stderr] Compiling zip v2.6.1 [INFO] [stderr] Checking unicode-properties v0.1.3 [INFO] [stderr] Checking rustc-demangle v0.1.24 [INFO] [stderr] Checking unicode-width v0.2.0 [INFO] [stderr] Checking unicode-script v0.5.7 [INFO] [stderr] Checking unicode-bidi-mirroring v0.2.0 [INFO] [stderr] Checking bumpalo v3.17.0 [INFO] [stderr] Compiling serde_json v1.0.140 [INFO] [stderr] Checking unicase v2.8.1 [INFO] [stderr] Checking dasp_sample v0.11.0 [INFO] [stderr] Checking yazi v0.2.1 [INFO] [stderr] Compiling backtrace v0.3.71 [INFO] [stderr] Compiling hidapi v2.6.3 [INFO] [stderr] Checking regex-automata v0.4.9 [INFO] [stderr] Checking hashbrown v0.15.2 [INFO] [stderr] Checking zeno v0.3.2 [INFO] [stderr] Checking ab_glyph_rasterizer v0.1.8 [INFO] [stderr] Checking rand_chacha v0.3.1 [INFO] [stderr] Checking lockfree-object-pool v0.1.6 [INFO] [stderr] Checking owned_ttf_parser v0.25.0 [INFO] [stderr] Checking ttf-parser v0.20.0 [INFO] [stderr] Checking addr2line v0.21.0 [INFO] [stderr] Checking ttf-parser v0.21.1 [INFO] [stderr] Checking mint v0.5.9 [INFO] [stderr] Checking zopfli v0.8.1 [INFO] [stderr] Checking rand v0.8.5 [INFO] [stderr] Checking ab_glyph v0.2.29 [INFO] [stderr] Checking clap_builder v4.5.35 [INFO] [stderr] Checking glam v0.29.3 [INFO] [stderr] Checking itertools v0.12.1 [INFO] [stderr] Checking triple_buffer v8.1.0 [INFO] [stderr] Checking thread_local v1.1.8 [INFO] [stderr] Checking unicode-segmentation v1.12.0 [INFO] [stderr] Checking atomic-arena v0.1.2 [INFO] [stderr] Checking indexmap v2.9.0 [INFO] [stderr] Checking rustc-hash v1.1.0 [INFO] [stderr] Checking sys-locale v0.3.2 [INFO] [stderr] Checking smol_str v0.2.2 [INFO] [stderr] Checking rtrb v0.3.2 [INFO] [stderr] Checking rangemap v1.5.1 [INFO] [stderr] Checking self_cell v1.1.0 [INFO] [stderr] Checking num-rational v0.4.2 [INFO] [stderr] Checking unicode-bidi v0.3.18 [INFO] [stderr] Checking dotenvy v0.15.7 [INFO] [stderr] Checking base32 v0.5.1 [INFO] [stderr] Checking assert_matches v1.5.0 [INFO] [stderr] Checking num v0.4.3 [INFO] [stderr] Checking rand_distr v0.4.3 [INFO] [stderr] Checking fontdb v0.16.2 [INFO] [stderr] Checking regex v1.11.1 [INFO] [stderr] Checking stable-eyre v0.2.2 [INFO] [stderr] Compiling bytemuck_derive v1.9.3 [INFO] [stderr] Compiling serde_derive v1.0.219 [INFO] [stderr] Compiling tracing-attributes v0.1.28 [INFO] [stderr] Compiling tokio-macros v2.5.0 [INFO] [stderr] Compiling clap_derive v4.5.32 [INFO] [stderr] Compiling serde_repr v0.1.20 [INFO] [stderr] Checking tokio v1.44.1 [INFO] [stderr] Checking tracing v0.1.41 [INFO] [stderr] Checking tracing-subscriber v0.3.19 [INFO] [stderr] Checking bytemuck v1.22.0 [INFO] [stderr] Checking font-types v0.8.4 [INFO] [stderr] Checking symphonia-core v0.5.4 [INFO] [stderr] Checking safe_arch v0.7.4 [INFO] [stderr] Checking image v0.25.6 [INFO] [stderr] Checking rustybuzz v0.14.1 [INFO] [stderr] Checking clap v4.5.35 [INFO] [stderr] Checking read-fonts v0.25.3 [INFO] [stderr] Checking wide v0.7.32 [INFO] [stderr] Checking symphonia-metadata v0.5.4 [INFO] [stderr] Checking symphonia-bundle-mp3 v0.5.4 [INFO] [stderr] Checking simba v0.8.1 [INFO] [stderr] Checking symphonia v0.5.4 [INFO] [stderr] Checking elgato-streamdeck v0.9.2 [INFO] [stderr] Checking kira v0.10.4 [INFO] [stderr] Checking uuid v1.16.0 [INFO] [stderr] Checking skrifa v0.26.6 [INFO] [stderr] Checking nalgebra v0.32.6 [INFO] [stderr] Checking swash v0.2.2 [INFO] [stderr] Checking cosmic-text v0.14.1 [INFO] [stderr] Checking imageproc v0.25.0 [INFO] [stderr] Checking noisedeck v0.1.0 (/opt/rustwide/workdir) [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 30.07s [INFO] running `Command { std: "docker" "inspect" "db4b82e1f272f56f25e2d64fb2ac34c6c25c43dcf6c2a90b3e46c83102adf81f", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "db4b82e1f272f56f25e2d64fb2ac34c6c25c43dcf6c2a90b3e46c83102adf81f", kill_on_drop: false }` [INFO] [stdout] db4b82e1f272f56f25e2d64fb2ac34c6c25c43dcf6c2a90b3e46c83102adf81f