[INFO] crate memcached-protocal 0.1.11 is already in cache [INFO] extracting crate memcached-protocal 0.1.11 into work/ex/clippy-test-run/sources/stable/reg/memcached-protocal/0.1.11 [INFO] extracting crate memcached-protocal 0.1.11 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/memcached-protocal/0.1.11 [INFO] validating manifest of memcached-protocal-0.1.11 on toolchain stable [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] validating manifest of memcached-protocal-0.1.11 on toolchain stable+rustflags=-Dclippy::into_iter_on_array [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] started frobbing memcached-protocal-0.1.11 [INFO] finished frobbing memcached-protocal-0.1.11 [INFO] frobbed toml for memcached-protocal-0.1.11 written to work/ex/clippy-test-run/sources/stable/reg/memcached-protocal/0.1.11/Cargo.toml [INFO] started frobbing memcached-protocal-0.1.11 [INFO] finished frobbing memcached-protocal-0.1.11 [INFO] frobbed toml for memcached-protocal-0.1.11 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/memcached-protocal/0.1.11/Cargo.toml [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"` [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"` [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] linting memcached-protocal-0.1.11 against stable for clippy-test-run [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-6/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/reg/memcached-protocal/0.1.11:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+stable" "clippy" "--frozen" "--all" "--all-targets"` [INFO] [stdout] d13f66f2df1fd09232517346326ea23bf6bf8f88c891b841861b02cbe5059f77 [INFO] running `"docker" "start" "-a" "d13f66f2df1fd09232517346326ea23bf6bf8f88c891b841861b02cbe5059f77"` [INFO] [stderr] Checking error-chain v0.2.2 [INFO] [stderr] Checking memcached-protocal v0.1.11 (/opt/crater/workdir) [INFO] [stderr] warning: redundant field names in struct initialization [INFO] [stderr] --> src/command/store_command.rs:70:13 [INFO] [stderr] | [INFO] [stderr] 70 | bytes: bytes, [INFO] [stderr] | ^^^^^^^^^^^^ help: replace it with: `bytes` [INFO] [stderr] | [INFO] [stderr] = note: #[warn(clippy::redundant_field_names)] on by default [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names [INFO] [stderr] [INFO] [stderr] warning: redundant field names in struct initialization [INFO] [stderr] --> src/command/store_command.rs:71:13 [INFO] [stderr] | [INFO] [stderr] 71 | cas_unique: cas_unique, [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `cas_unique` [INFO] [stderr] | [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names [INFO] [stderr] [INFO] [stderr] warning: redundant field names in struct initialization [INFO] [stderr] --> src/command/store_command.rs:72:13 [INFO] [stderr] | [INFO] [stderr] 72 | noreply: noreply, [INFO] [stderr] | ^^^^^^^^^^^^^^^^ help: replace it with: `noreply` [INFO] [stderr] | [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names [INFO] [stderr] [INFO] [stderr] warning: redundant field names in struct initialization [INFO] [stderr] --> src/command/store_command.rs:73:13 [INFO] [stderr] | [INFO] [stderr] 73 | data_block: data_block, [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `data_block` [INFO] [stderr] | [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names [INFO] [stderr] [INFO] [stderr] warning: redundant field names in struct initialization [INFO] [stderr] --> src/command/retrieval_command.rs:28:13 [INFO] [stderr] | [INFO] [stderr] 28 | keys: keys, [INFO] [stderr] | ^^^^^^^^^^ help: replace it with: `keys` [INFO] [stderr] | [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names [INFO] [stderr] [INFO] [stderr] warning: redundant field names in struct initialization [INFO] [stderr] --> src/command/deletion_command.rs:35:13 [INFO] [stderr] | [INFO] [stderr] 35 | noreply: noreply, [INFO] [stderr] | ^^^^^^^^^^^^^^^^ help: replace it with: `noreply` [INFO] [stderr] | [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names [INFO] [stderr] [INFO] [stderr] warning: redundant field names in struct initialization [INFO] [stderr] --> src/command/store_command.rs:70:13 [INFO] [stderr] | [INFO] [stderr] 70 | bytes: bytes, [INFO] [stderr] | ^^^^^^^^^^^^ help: replace it with: `bytes` [INFO] [stderr] | [INFO] [stderr] = note: #[warn(clippy::redundant_field_names)] on by default [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names [INFO] [stderr] [INFO] [stderr] warning: redundant field names in struct initialization [INFO] [stderr] --> src/command/store_command.rs:71:13 [INFO] [stderr] | [INFO] [stderr] 71 | cas_unique: cas_unique, [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `cas_unique` [INFO] [stderr] | [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names [INFO] [stderr] [INFO] [stderr] warning: redundant field names in struct initialization [INFO] [stderr] --> src/command/store_command.rs:72:13 [INFO] [stderr] | [INFO] [stderr] 72 | noreply: noreply, [INFO] [stderr] | ^^^^^^^^^^^^^^^^ help: replace it with: `noreply` [INFO] [stderr] | [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names [INFO] [stderr] [INFO] [stderr] warning: redundant field names in struct initialization [INFO] [stderr] --> src/command/store_command.rs:73:13 [INFO] [stderr] | [INFO] [stderr] 73 | data_block: data_block, [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `data_block` [INFO] [stderr] | [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names [INFO] [stderr] [INFO] [stderr] warning: redundant field names in struct initialization [INFO] [stderr] --> src/command/retrieval_command.rs:28:13 [INFO] [stderr] | [INFO] [stderr] 28 | keys: keys, [INFO] [stderr] | ^^^^^^^^^^ help: replace it with: `keys` [INFO] [stderr] | [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names [INFO] [stderr] [INFO] [stderr] warning: redundant field names in struct initialization [INFO] [stderr] --> src/command/deletion_command.rs:35:13 [INFO] [stderr] | [INFO] [stderr] 35 | noreply: noreply, [INFO] [stderr] | ^^^^^^^^^^^^^^^^ help: replace it with: `noreply` [INFO] [stderr] | [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names [INFO] [stderr] [INFO] [stderr] warning: module has the same name as its containing module [INFO] [stderr] --> src/command/mod.rs:4:1 [INFO] [stderr] | [INFO] [stderr] 4 | pub mod command; [INFO] [stderr] | ^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(clippy::module_inception)] on by default [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#module_inception [INFO] [stderr] [INFO] [stderr] warning: unneeded return statement [INFO] [stderr] --> src/response/retrieval_response.rs:26:9 [INFO] [stderr] | [INFO] [stderr] 26 | return Ok(buf); [INFO] [stderr] | ^^^^^^^^^^^^^^^ help: remove `return` as shown: `Ok(buf)` [INFO] [stderr] | [INFO] [stderr] = note: #[warn(clippy::needless_return)] on by default [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return [INFO] [stderr] [INFO] [stderr] warning: unneeded return statement [INFO] [stderr] --> src/response/retrieval_response.rs:41:9 [INFO] [stderr] | [INFO] [stderr] 41 | return Ok(buf); [INFO] [stderr] | ^^^^^^^^^^^^^^^ help: remove `return` as shown: `Ok(buf)` [INFO] [stderr] | [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return [INFO] [stderr] [INFO] [stderr] warning: module has the same name as its containing module [INFO] [stderr] --> src/response/mod.rs:5:1 [INFO] [stderr] | [INFO] [stderr] 5 | pub mod response; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#module_inception [INFO] [stderr] [INFO] [stderr] warning: module has the same name as its containing module [INFO] [stderr] --> src/command/mod.rs:4:1 [INFO] [stderr] | [INFO] [stderr] 4 | pub mod command; [INFO] [stderr] | ^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(clippy::module_inception)] on by default [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#module_inception [INFO] [stderr] [INFO] [stderr] warning: unneeded return statement [INFO] [stderr] --> src/response/retrieval_response.rs:26:9 [INFO] [stderr] | [INFO] [stderr] 26 | return Ok(buf); [INFO] [stderr] | ^^^^^^^^^^^^^^^ help: remove `return` as shown: `Ok(buf)` [INFO] [stderr] | [INFO] [stderr] = note: #[warn(clippy::needless_return)] on by default [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return [INFO] [stderr] [INFO] [stderr] warning: unneeded return statement [INFO] [stderr] --> src/response/retrieval_response.rs:41:9 [INFO] [stderr] | [INFO] [stderr] 41 | return Ok(buf); [INFO] [stderr] | ^^^^^^^^^^^^^^^ help: remove `return` as shown: `Ok(buf)` [INFO] [stderr] | [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return [INFO] [stderr] [INFO] [stderr] warning: module has the same name as its containing module [INFO] [stderr] --> src/response/mod.rs:5:1 [INFO] [stderr] | [INFO] [stderr] 5 | pub mod response; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#module_inception [INFO] [stderr] [INFO] [stderr] warning: struct is never constructed: `StatsResponseItem` [INFO] [stderr] --> src/response/stats_response.rs:3:1 [INFO] [stderr] | [INFO] [stderr] 3 | struct StatsResponseItem { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(dead_code)] on by default [INFO] [stderr] [INFO] [stderr] warning: type alias is never used: `StatsResponse` [INFO] [stderr] --> src/response/stats_response.rs:8:1 [INFO] [stderr] | [INFO] [stderr] 8 | type StatsResponse = Vec; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: you seem to be trying to match on a boolean expression [INFO] [stderr] --> src/command/store_command.rs:40:9 [INFO] [stderr] | [INFO] [stderr] 40 | / match is_cas { [INFO] [stderr] 41 | | true if 6 <= length && length <= 7 => (), [INFO] [stderr] 42 | | false if 5 <= length && length <= 6 => (), [INFO] [stderr] 43 | | _ => return Err(ErrorKind::ClientError("wrong size of params".to_owned()).into()), [INFO] [stderr] 44 | | } [INFO] [stderr] | |_________^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(clippy::match_bool)] on by default [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_bool [INFO] [stderr] [INFO] [stderr] warning: you seem to be trying to match on a boolean expression [INFO] [stderr] --> src/command/store_command.rs:53:23 [INFO] [stderr] | [INFO] [stderr] 53 | let noreply = match is_cas { [INFO] [stderr] | _______________________^ [INFO] [stderr] 54 | | true if length == 7 => Some(segments[6].to_owned()), [INFO] [stderr] 55 | | false if length == 6 => Some(segments[5].to_owned()), [INFO] [stderr] 56 | | _ => None, [INFO] [stderr] 57 | | }; [INFO] [stderr] | |_________^ [INFO] [stderr] | [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_bool [INFO] [stderr] [INFO] [stderr] warning: this let-binding has unit value. Consider omitting `let _ =` [INFO] [stderr] --> src/command/store_command.rs:60:9 [INFO] [stderr] | [INFO] [stderr] 60 | let _ = try!(reader.read_exact(&mut data_block)); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(clippy::let_unit_value)] on by default [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_unit_value [INFO] [stderr] [INFO] [stderr] warning: length comparison to zero [INFO] [stderr] --> src/byte_utils.rs:45:16 [INFO] [stderr] | [INFO] [stderr] 45 | if available.len() == 0 { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `available.is_empty()` [INFO] [stderr] | [INFO] [stderr] = note: #[warn(clippy::len_zero)] on by default [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero [INFO] [stderr] [INFO] [stderr] error: handle written amount returned or use `Write::write_all` instead [INFO] [stderr] --> src/response/retrieval_response.rs:25:9 [INFO] [stderr] | [INFO] [stderr] 25 | try!(buf.write(b"\r\n")); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[deny(clippy::unused_io_amount)] on by default [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_io_amount [INFO] [stderr] = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info) [INFO] [stderr] [INFO] [stderr] error: handle written amount returned or use `Write::write_all` instead [INFO] [stderr] --> src/response/retrieval_response.rs:40:9 [INFO] [stderr] | [INFO] [stderr] 40 | try!(buf.write(b"END\r\n")); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_io_amount [INFO] [stderr] = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info) [INFO] [stderr] [INFO] [stderr] error: aborting due to 2 previous errors [INFO] [stderr] [INFO] [stderr] error: Could not compile `memcached-protocal`. [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stderr] warning: struct is never constructed: `StatsResponseItem` [INFO] [stderr] --> src/response/stats_response.rs:3:1 [INFO] [stderr] | [INFO] [stderr] 3 | struct StatsResponseItem { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(dead_code)] on by default [INFO] [stderr] [INFO] [stderr] warning: type alias is never used: `StatsResponse` [INFO] [stderr] --> src/response/stats_response.rs:8:1 [INFO] [stderr] | [INFO] [stderr] 8 | type StatsResponse = Vec; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: you seem to be trying to match on a boolean expression [INFO] [stderr] --> src/command/store_command.rs:40:9 [INFO] [stderr] | [INFO] [stderr] 40 | / match is_cas { [INFO] [stderr] 41 | | true if 6 <= length && length <= 7 => (), [INFO] [stderr] 42 | | false if 5 <= length && length <= 6 => (), [INFO] [stderr] 43 | | _ => return Err(ErrorKind::ClientError("wrong size of params".to_owned()).into()), [INFO] [stderr] 44 | | } [INFO] [stderr] | |_________^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(clippy::match_bool)] on by default [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_bool [INFO] [stderr] [INFO] [stderr] warning: you seem to be trying to match on a boolean expression [INFO] [stderr] --> src/command/store_command.rs:53:23 [INFO] [stderr] | [INFO] [stderr] 53 | let noreply = match is_cas { [INFO] [stderr] | _______________________^ [INFO] [stderr] 54 | | true if length == 7 => Some(segments[6].to_owned()), [INFO] [stderr] 55 | | false if length == 6 => Some(segments[5].to_owned()), [INFO] [stderr] 56 | | _ => None, [INFO] [stderr] 57 | | }; [INFO] [stderr] | |_________^ [INFO] [stderr] | [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_bool [INFO] [stderr] [INFO] [stderr] warning: this let-binding has unit value. Consider omitting `let _ =` [INFO] [stderr] --> src/command/store_command.rs:60:9 [INFO] [stderr] | [INFO] [stderr] 60 | let _ = try!(reader.read_exact(&mut data_block)); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(clippy::let_unit_value)] on by default [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_unit_value [INFO] [stderr] [INFO] [stderr] warning: length comparison to zero [INFO] [stderr] --> src/byte_utils.rs:45:16 [INFO] [stderr] | [INFO] [stderr] 45 | if available.len() == 0 { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `available.is_empty()` [INFO] [stderr] | [INFO] [stderr] = note: #[warn(clippy::len_zero)] on by default [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero [INFO] [stderr] [INFO] [stderr] error: handle written amount returned or use `Write::write_all` instead [INFO] [stderr] --> src/response/retrieval_response.rs:25:9 [INFO] [stderr] | [INFO] [stderr] 25 | try!(buf.write(b"\r\n")); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[deny(clippy::unused_io_amount)] on by default [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_io_amount [INFO] [stderr] = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info) [INFO] [stderr] [INFO] [stderr] error: handle written amount returned or use `Write::write_all` instead [INFO] [stderr] --> src/response/retrieval_response.rs:40:9 [INFO] [stderr] | [INFO] [stderr] 40 | try!(buf.write(b"END\r\n")); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_io_amount [INFO] [stderr] = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info) [INFO] [stderr] [INFO] [stderr] error: aborting due to 2 previous errors [INFO] [stderr] [INFO] [stderr] error: Could not compile `memcached-protocal`. [INFO] [stderr] [INFO] [stderr] To learn more, run the command again with --verbose. [INFO] running `"docker" "inspect" "d13f66f2df1fd09232517346326ea23bf6bf8f88c891b841861b02cbe5059f77"` [INFO] running `"docker" "rm" "-f" "d13f66f2df1fd09232517346326ea23bf6bf8f88c891b841861b02cbe5059f77"` [INFO] [stdout] d13f66f2df1fd09232517346326ea23bf6bf8f88c891b841861b02cbe5059f77