[INFO] fetching crate slog-gelf 0.1.2... [INFO] testing slog-gelf-0.1.2 against master#c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38 for pr-146098-8 [INFO] extracting crate slog-gelf 0.1.2 into /workspace/builds/worker-4-tc1/source [INFO] started tweaking crates.io crate slog-gelf 0.1.2 [INFO] finished tweaking crates.io crate slog-gelf 0.1.2 [INFO] tweaked toml for crates.io crate slog-gelf 0.1.2 written to /workspace/builds/worker-4-tc1/source/Cargo.toml [INFO] validating manifest of crates.io crate slog-gelf 0.1.2 on toolchain c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Updating crates.io index [INFO] [stderr] Locking 90 packages to latest compatible versions [INFO] [stderr] Adding hostname v0.1.5 (available: v0.4.1) [INFO] [stderr] Adding rand v0.7.3 (available: v0.9.2) [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024 [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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] e1bb0baa9140557c626745078fd961de2a26390199b2deb371328cda0943aeca [INFO] running `Command { std: "docker" "start" "-a" "e1bb0baa9140557c626745078fd961de2a26390199b2deb371328cda0943aeca", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "e1bb0baa9140557c626745078fd961de2a26390199b2deb371328cda0943aeca", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "e1bb0baa9140557c626745078fd961de2a26390199b2deb371328cda0943aeca", kill_on_drop: false }` [INFO] [stdout] e1bb0baa9140557c626745078fd961de2a26390199b2deb371328cda0943aeca [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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 5fafc04dba7c1e3ac9618fbaa344f8f682568816828ebcb2e7ab6a1a991ec6c1 [INFO] running `Command { std: "docker" "start" "-a" "5fafc04dba7c1e3ac9618fbaa344f8f682568816828ebcb2e7ab6a1a991ec6c1", kill_on_drop: false }` [INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024 [INFO] [stderr] Compiling bitflags v2.10.0 [INFO] [stderr] Compiling pulldown-cmark v0.9.6 [INFO] [stderr] Compiling error-chain v0.12.4 [INFO] [stderr] Compiling rustix v1.1.2 [INFO] [stderr] Compiling linux-raw-sys v0.11.0 [INFO] [stderr] Compiling camino v1.2.1 [INFO] [stderr] Compiling semver v1.0.27 [INFO] [stderr] Compiling fastrand v2.3.0 [INFO] [stderr] Compiling same-file v1.0.6 [INFO] [stderr] Compiling serde_json v1.0.145 [INFO] [stderr] Compiling unicase v2.8.1 [INFO] [stderr] Compiling once_cell v1.21.3 [INFO] [stderr] Compiling getrandom v0.1.16 [INFO] [stderr] Compiling bytecount v0.6.9 [INFO] [stderr] Compiling serde v1.0.228 [INFO] [stderr] Compiling slog v2.8.2 [INFO] [stderr] Compiling walkdir v2.5.0 [INFO] [stderr] Compiling rand_core v0.5.1 [INFO] [stderr] Compiling rand_chacha v0.2.2 [INFO] [stderr] Compiling cargo-platform v0.1.9 [INFO] [stderr] Compiling erased-serde v0.3.31 [INFO] [stderr] Compiling rand v0.7.3 [INFO] [stderr] Compiling cargo_metadata v0.14.2 [INFO] [stderr] Compiling tempfile v3.23.0 [INFO] [stderr] Compiling skeptic v0.13.7 [INFO] [stderr] Compiling slog-gelf v0.1.2 (/opt/rustwide/workdir) [INFO] [stdout] warning: field `full_message` is never read [INFO] [stdout] --> src/message.rs:10:9 [INFO] [stdout] | [INFO] [stdout] 6 | pub struct Message<'a> { [INFO] [stdout] | ------- field in this struct [INFO] [stdout] ... [INFO] [stdout] 10 | pub full_message: Option, [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/chunked.rs:78:17 [INFO] [stdout] | [INFO] [stdout] 78 | pub fn iter(&self) -> ChunkedMessageIterator { [INFO] [stdout] | ^^^^^ ^^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here [INFO] [stdout] | | [INFO] [stdout] | the lifetime is elided here [INFO] [stdout] | [INFO] [stdout] = help: the same lifetime is referred to in inconsistent ways, making the signature confusing [INFO] [stdout] = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default [INFO] [stdout] help: use `'_` for type paths [INFO] [stdout] | [INFO] [stdout] 78 | pub fn iter(&self) -> ChunkedMessageIterator<'_> { [INFO] [stdout] | ++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: hiding a lifetime that's named elsewhere is confusing [INFO] [stdout] --> src/chunked.rs:89:40 [INFO] [stdout] | [INFO] [stdout] 89 | fn new(msg: &'a ChunkedMessage) -> ChunkedMessageIterator { [INFO] [stdout] | -- ^^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here [INFO] [stdout] | | [INFO] [stdout] | the lifetime is named here [INFO] [stdout] | [INFO] [stdout] = help: the same lifetime is referred to in inconsistent ways, making the signature confusing [INFO] [stdout] help: consistently use `'a` [INFO] [stdout] | [INFO] [stdout] 89 | fn new(msg: &'a ChunkedMessage) -> ChunkedMessageIterator<'a> { [INFO] [stdout] | ++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.42s [INFO] running `Command { std: "docker" "inspect" "5fafc04dba7c1e3ac9618fbaa344f8f682568816828ebcb2e7ab6a1a991ec6c1", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "5fafc04dba7c1e3ac9618fbaa344f8f682568816828ebcb2e7ab6a1a991ec6c1", kill_on_drop: false }` [INFO] [stdout] 5fafc04dba7c1e3ac9618fbaa344f8f682568816828ebcb2e7ab6a1a991ec6c1 [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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] f9ba6406dfa13b0df723b596f3e0432f1cea05707480b12c2464a2e94e675605 [INFO] running `Command { std: "docker" "start" "-a" "f9ba6406dfa13b0df723b596f3e0432f1cea05707480b12c2464a2e94e675605", kill_on_drop: false }` [INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024 [INFO] [stderr] Compiling pulldown-cmark v0.9.6 [INFO] [stderr] Compiling error-chain v0.12.4 [INFO] [stderr] Compiling glob v0.3.3 [INFO] [stderr] Compiling bytecount v0.6.9 [INFO] [stderr] Compiling slog-async v2.8.0 [INFO] [stderr] Compiling tempfile v3.23.0 [INFO] [stderr] Compiling thread_local v1.1.9 [INFO] [stderr] Compiling take_mut v0.2.2 [INFO] [stderr] Compiling hostname v0.1.5 [INFO] [stderr] Compiling cargo-platform v0.1.9 [INFO] [stderr] Compiling cargo_metadata v0.14.2 [INFO] [stderr] Compiling skeptic v0.13.7 [INFO] [stderr] Compiling slog-gelf v0.1.2 (/opt/rustwide/workdir) [INFO] [stdout] warning: field `full_message` is never read [INFO] [stdout] --> src/message.rs:10:9 [INFO] [stdout] | [INFO] [stdout] 6 | pub struct Message<'a> { [INFO] [stdout] | ------- field in this struct [INFO] [stdout] ... [INFO] [stdout] 10 | pub full_message: Option, [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/chunked.rs:78:17 [INFO] [stdout] | [INFO] [stdout] 78 | pub fn iter(&self) -> ChunkedMessageIterator { [INFO] [stdout] | ^^^^^ ^^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here [INFO] [stdout] | | [INFO] [stdout] | the lifetime is elided here [INFO] [stdout] | [INFO] [stdout] = help: the same lifetime is referred to in inconsistent ways, making the signature confusing [INFO] [stdout] = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default [INFO] [stdout] help: use `'_` for type paths [INFO] [stdout] | [INFO] [stdout] 78 | pub fn iter(&self) -> ChunkedMessageIterator<'_> { [INFO] [stdout] | ++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: hiding a lifetime that's named elsewhere is confusing [INFO] [stdout] --> src/chunked.rs:89:40 [INFO] [stdout] | [INFO] [stdout] 89 | fn new(msg: &'a ChunkedMessage) -> ChunkedMessageIterator { [INFO] [stdout] | -- ^^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here [INFO] [stdout] | | [INFO] [stdout] | the lifetime is named here [INFO] [stdout] | [INFO] [stdout] = help: the same lifetime is referred to in inconsistent ways, making the signature confusing [INFO] [stdout] help: consistently use `'a` [INFO] [stdout] | [INFO] [stdout] 89 | fn new(msg: &'a ChunkedMessage) -> ChunkedMessageIterator<'a> { [INFO] [stdout] | ++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `full_message` is never read [INFO] [stdout] --> src/message.rs:10:9 [INFO] [stdout] | [INFO] [stdout] 6 | pub struct Message<'a> { [INFO] [stdout] | ------- field in this struct [INFO] [stdout] ... [INFO] [stdout] 10 | pub full_message: Option, [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/chunked.rs:78:17 [INFO] [stdout] | [INFO] [stdout] 78 | pub fn iter(&self) -> ChunkedMessageIterator { [INFO] [stdout] | ^^^^^ ^^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here [INFO] [stdout] | | [INFO] [stdout] | the lifetime is elided here [INFO] [stdout] | [INFO] [stdout] = help: the same lifetime is referred to in inconsistent ways, making the signature confusing [INFO] [stdout] = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default [INFO] [stdout] help: use `'_` for type paths [INFO] [stdout] | [INFO] [stdout] 78 | pub fn iter(&self) -> ChunkedMessageIterator<'_> { [INFO] [stdout] | ++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: hiding a lifetime that's named elsewhere is confusing [INFO] [stdout] --> src/chunked.rs:89:40 [INFO] [stdout] | [INFO] [stdout] 89 | fn new(msg: &'a ChunkedMessage) -> ChunkedMessageIterator { [INFO] [stdout] | -- ^^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here [INFO] [stdout] | | [INFO] [stdout] | the lifetime is named here [INFO] [stdout] | [INFO] [stdout] = help: the same lifetime is referred to in inconsistent ways, making the signature confusing [INFO] [stdout] help: consistently use `'a` [INFO] [stdout] | [INFO] [stdout] 89 | fn new(msg: &'a ChunkedMessage) -> ChunkedMessageIterator<'a> { [INFO] [stdout] | ++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 4.58s [INFO] running `Command { std: "docker" "inspect" "f9ba6406dfa13b0df723b596f3e0432f1cea05707480b12c2464a2e94e675605", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "f9ba6406dfa13b0df723b596f3e0432f1cea05707480b12c2464a2e94e675605", kill_on_drop: false }` [INFO] [stdout] f9ba6406dfa13b0df723b596f3e0432f1cea05707480b12c2464a2e94e675605 [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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "test" "--frozen", kill_on_drop: false }` [INFO] [stdout] 56bc70f01c6a6573b712fbbd41ac87095406c4e9336e70a4899ccea9f29de60f [INFO] running `Command { std: "docker" "start" "-a" "56bc70f01c6a6573b712fbbd41ac87095406c4e9336e70a4899ccea9f29de60f", kill_on_drop: false }` [INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024 [INFO] [stderr] warning: field `full_message` is never read [INFO] [stderr] --> src/message.rs:10:9 [INFO] [stderr] | [INFO] [stderr] 6 | pub struct Message<'a> { [INFO] [stderr] | ------- field in this struct [INFO] [stderr] ... [INFO] [stderr] 10 | pub full_message: Option, [INFO] [stderr] | ^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stderr] [INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stderr] --> src/chunked.rs:78:17 [INFO] [stderr] | [INFO] [stderr] 78 | pub fn iter(&self) -> ChunkedMessageIterator { [INFO] [stderr] | ^^^^^ ^^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here [INFO] [stderr] | | [INFO] [stderr] | the lifetime is elided here [INFO] [stderr] | [INFO] [stderr] = help: the same lifetime is referred to in inconsistent ways, making the signature confusing [INFO] [stderr] = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default [INFO] [stderr] help: use `'_` for type paths [INFO] [stderr] | [INFO] [stderr] 78 | pub fn iter(&self) -> ChunkedMessageIterator<'_> { [INFO] [stderr] | ++++ [INFO] [stderr] [INFO] [stderr] warning: hiding a lifetime that's named elsewhere is confusing [INFO] [stderr] --> src/chunked.rs:89:40 [INFO] [stderr] | [INFO] [stderr] 89 | fn new(msg: &'a ChunkedMessage) -> ChunkedMessageIterator { [INFO] [stderr] | -- ^^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here [INFO] [stderr] | | [INFO] [stderr] | the lifetime is named here [INFO] [stderr] | [INFO] [stderr] = help: the same lifetime is referred to in inconsistent ways, making the signature confusing [INFO] [stderr] help: consistently use `'a` [INFO] [stderr] | [INFO] [stderr] 89 | fn new(msg: &'a ChunkedMessage) -> ChunkedMessageIterator<'a> { [INFO] [stderr] | ++++ [INFO] [stderr] [INFO] [stderr] warning: `slog-gelf` (lib) generated 3 warnings (run `cargo fix --lib -p slog-gelf` to apply 2 suggestions) [INFO] [stderr] warning: `slog-gelf` (lib test) generated 3 warnings (3 duplicates) [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 0.12s [INFO] [stderr] Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/slog_gelf-3dde9c0262d5cf8b) [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 slog_gelf [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" "56bc70f01c6a6573b712fbbd41ac87095406c4e9336e70a4899ccea9f29de60f", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "56bc70f01c6a6573b712fbbd41ac87095406c4e9336e70a4899ccea9f29de60f", kill_on_drop: false }` [INFO] [stdout] 56bc70f01c6a6573b712fbbd41ac87095406c4e9336e70a4899ccea9f29de60f