Nov 25 21:51:49.134 INFO testing adumbidiot/schoology-rs against beta-2018-11-24 for beta-1.31-4
Nov 25 21:51:49.134 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-4/worker-5/beta-2018-11-24:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/beta-1.31-4/beta-2018-11-24:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +beta-2018-11-24 build --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Nov 25 21:51:49.701 INFO [stdout] 95e9205ef04115bc09a3f113cf62a9ad2d0174dfd70723e7e25cdec2273c7afd
Nov 25 21:51:49.703 INFO running `"docker" "start" "-a" "95e9205ef04115bc09a3f113cf62a9ad2d0174dfd70723e7e25cdec2273c7afd"`
Nov 25 21:51:51.991 INFO [stderr] usermod: no changes
Nov 25 21:51:52.223 INFO [stderr]    Compiling hyper-native-tls v0.2.4
Nov 25 21:51:54.626 INFO [stderr]    Compiling schoology v0.0.1 (/source)
Nov 25 21:51:59.145 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.12s
Nov 25 21:51:59.165 INFO [stderr] su: No module specific data is present
Nov 25 21:52:00.783 INFO running `"docker" "inspect" "95e9205ef04115bc09a3f113cf62a9ad2d0174dfd70723e7e25cdec2273c7afd"`
Nov 25 21:52:01.040 INFO running `"docker" "rm" "-f" "95e9205ef04115bc09a3f113cf62a9ad2d0174dfd70723e7e25cdec2273c7afd"`
Nov 25 21:52:01.376 INFO [stdout] 95e9205ef04115bc09a3f113cf62a9ad2d0174dfd70723e7e25cdec2273c7afd
Nov 25 21:52:01.380 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-4/worker-5/beta-2018-11-24:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/beta-1.31-4/beta-2018-11-24:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +beta-2018-11-24 test --frozen --no-run" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Nov 25 21:52:01.873 INFO [stdout] 0ccdc7c08e6bfab60ca44b1df72810d890f49ad30fa37eb4975d67a12144968b
Nov 25 21:52:01.875 INFO running `"docker" "start" "-a" "0ccdc7c08e6bfab60ca44b1df72810d890f49ad30fa37eb4975d67a12144968b"`
Nov 25 21:52:04.166 INFO [stderr] usermod: no changes
Nov 25 21:52:04.361 INFO [stderr]    Compiling schoology v0.0.1 (/source)
Nov 25 21:52:21.233 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 17.04s
Nov 25 21:52:21.246 INFO [stderr] su: No module specific data is present
Nov 25 21:52:22.810 INFO running `"docker" "inspect" "0ccdc7c08e6bfab60ca44b1df72810d890f49ad30fa37eb4975d67a12144968b"`
Nov 25 21:52:23.168 INFO running `"docker" "rm" "-f" "0ccdc7c08e6bfab60ca44b1df72810d890f49ad30fa37eb4975d67a12144968b"`
Nov 25 21:52:23.537 INFO [stdout] 0ccdc7c08e6bfab60ca44b1df72810d890f49ad30fa37eb4975d67a12144968b
Nov 25 21:52:23.540 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-4/worker-5/beta-2018-11-24:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/beta-1.31-4/beta-2018-11-24:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +beta-2018-11-24 test --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Nov 25 21:52:24.115 INFO [stdout] 20a4293bb66f6af81b04712bd8ecd82035a8082ebe9612f38da7e7538fcdacf6
Nov 25 21:52:24.117 INFO running `"docker" "start" "-a" "20a4293bb66f6af81b04712bd8ecd82035a8082ebe9612f38da7e7538fcdacf6"`
Nov 25 21:52:26.024 INFO [stderr] usermod: no changes
Nov 25 21:52:26.286 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.21s
Nov 25 21:52:26.296 INFO [stderr]      Running /target/debug/deps/schoology-5babd61583f7e467
Nov 25 21:52:26.323 INFO [stdout] 
Nov 25 21:52:26.323 INFO [stdout] running 0 tests
Nov 25 21:52:26.323 INFO [stdout] 
Nov 25 21:52:26.323 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Nov 25 21:52:26.323 INFO [stdout] 
Nov 25 21:52:26.324 INFO [stderr]      Running /target/debug/deps/common-6eaf43936a4deaf2
Nov 25 21:52:26.326 INFO [stdout] 
Nov 25 21:52:26.326 INFO [stdout] running 0 tests
Nov 25 21:52:26.326 INFO [stdout] 
Nov 25 21:52:26.326 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Nov 25 21:52:26.327 INFO [stdout] 
Nov 25 21:52:26.328 INFO [stderr]      Running /target/debug/deps/group_test-19caabdd5cb23f54
Nov 25 21:52:26.332 INFO [stdout] 
Nov 25 21:52:26.332 INFO [stdout] running 2 tests
Nov 25 21:52:26.485 INFO [stdout] test list_groups ... FAILED
Nov 25 21:52:26.486 INFO [stdout] test get_groups ... FAILED
Nov 25 21:52:26.486 INFO [stdout] 
Nov 25 21:52:26.486 INFO [stdout] failures:
Nov 25 21:52:26.487 INFO [stdout] 
Nov 25 21:52:26.488 INFO [stdout] ---- list_groups stdout ----
Nov 25 21:52:26.488 INFO [stdout] thread 'list_groups' panicked at 'Error opening file: Os { code: 2, kind: NotFound, message: "No such file or directory" }', libcore/result.rs:1009:5
Nov 25 21:52:26.488 INFO [stdout] stack backtrace:
Nov 25 21:52:26.488 INFO [stdout]    0:     0x55d96c4b202f - std::sys::unix::backtrace::tracing::imp::unwind_backtrace::h4a3f2b0a6aea61f6
Nov 25 21:52:26.488 INFO [stdout]                                at libstd/sys/unix/backtrace/tracing/gcc_s.rs:49
Nov 25 21:52:26.488 INFO [stdout]    1:     0x55d96c4bb757 - std::sys_common::backtrace::print::ha3c126c2ffb9ce84
Nov 25 21:52:26.488 INFO [stdout]                                at libstd/sys_common/backtrace.rs:71
Nov 25 21:52:26.488 INFO [stdout]                                at libstd/sys_common/backtrace.rs:59
Nov 25 21:52:26.488 INFO [stdout]    2:     0x55d96c4b622f - std::panicking::default_hook::{{closure}}::hba1085c5a9c8488f
Nov 25 21:52:26.488 INFO [stdout]                                at libstd/panicking.rs:211
Nov 25 21:52:26.488 INFO [stdout]    3:     0x55d96c4b5f2e - std::panicking::default_hook::hf6bcf2946ff21cec
Nov 25 21:52:26.488 INFO [stdout]                                at libstd/panicking.rs:221
Nov 25 21:52:26.488 INFO [stdout]    4:     0x55d96c4b690e - std::panicking::rust_panic_with_hook::h5e8bedae9879cff4
Nov 25 21:52:26.488 INFO [stdout]                                at libstd/panicking.rs:476
Nov 25 21:52:26.488 INFO [stdout]    5:     0x55d96c4b64b1 - std::panicking::continue_panic_fmt::habd61f37c940cd28
Nov 25 21:52:26.488 INFO [stdout]                                at libstd/panicking.rs:390
Nov 25 21:52:26.488 INFO [stdout]    6:     0x55d96c4b6395 - rust_begin_unwind
Nov 25 21:52:26.488 INFO [stdout]                                at libstd/panicking.rs:325
Nov 25 21:52:26.488 INFO [stdout]    7:     0x55d96c4faa1c - core::panicking::panic_fmt::h9402c42f94a33ab6
Nov 25 21:52:26.488 INFO [stdout]                                at libcore/panicking.rs:77
Nov 25 21:52:26.488 INFO [stdout]    8:     0x55d96c34bf40 - core::result::unwrap_failed::h19bd57e730359b92
Nov 25 21:52:26.488 INFO [stdout]                                at libcore/macros.rs:26
Nov 25 21:52:26.488 INFO [stdout]    9:     0x55d96c2c13c7 - <core::result::Result<T, E>>::expect::h6ea36d2a85e2672f
Nov 25 21:52:26.488 INFO [stdout]                                at libcore/result.rs:835
Nov 25 21:52:26.488 INFO [stdout]   10:     0x55d96c2c22a2 - group_test::common::load_file::hc22d244312fb234f
Nov 25 21:52:26.488 INFO [stdout]                                at tests/common.rs:4
Nov 25 21:52:26.488 INFO [stdout]   11:     0x55d96c2c2345 - group_test::common::get_api::hc89e2ff946256ea7
Nov 25 21:52:26.488 INFO [stdout]                                at tests/common.rs:9
Nov 25 21:52:26.488 INFO [stdout]   12:     0x55d96c2c00d0 - group_test::list_groups::h3f94e0cdb8ea8c6f
Nov 25 21:52:26.488 INFO [stdout]                                at tests/group_test.rs:24
Nov 25 21:52:26.488 INFO [stdout]   13:     0x55d96c2c00a9 - group_test::list_groups::{{closure}}::ha9bdc2caf843caa7
Nov 25 21:52:26.488 INFO [stdout]                                at tests/group_test.rs:23
Nov 25 21:52:26.488 INFO [stdout]   14:     0x55d96c2c04bd - core::ops::function::FnOnce::call_once::h45ec4e8b3e6a9b99
Nov 25 21:52:26.488 INFO [stdout]                                at libcore/ops/function.rs:238
Nov 25 21:52:26.488 INFO [stdout]   15:     0x55d96c2c405e - <F as alloc::boxed::FnBox<A>>::call_box::h197560f1a673646c
Nov 25 21:52:26.488 INFO [stdout]                                at libtest/lib.rs:1468
Nov 25 21:52:26.489 INFO [stdout]                                at libcore/ops/function.rs:238
Nov 25 21:52:26.489 INFO [stdout]                                at liballoc/boxed.rs:672
Nov 25 21:52:26.489 INFO [stdout]   16:     0x55d96c4c6989 - __rust_maybe_catch_panic
Nov 25 21:52:26.489 INFO [stdout]                                at libpanic_unwind/lib.rs:102
Nov 25 21:52:26.489 INFO [stdout]   17:     0x55d96c2e5e42 - std::sys_common::backtrace::__rust_begin_short_backtrace::hd53fa9cf08c75613
Nov 25 21:52:26.489 INFO [stdout]                                at libstd/panicking.rs:289
Nov 25 21:52:26.489 INFO [stdout]                                at libstd/panic.rs:392
Nov 25 21:52:26.489 INFO [stdout]                                at libtest/lib.rs:1423
Nov 25 21:52:26.489 INFO [stdout]                                at libstd/sys_common/backtrace.rs:136
Nov 25 21:52:26.489 INFO [stdout]   18:     0x55d96c2e68f4 - std::panicking::try::do_call::he795fdeb2cabb605
Nov 25 21:52:26.489 INFO [stdout]                                at libstd/thread/mod.rs:409
Nov 25 21:52:26.489 INFO [stdout]                                at libstd/panic.rs:313
Nov 25 21:52:26.489 INFO [stdout]                                at libstd/panicking.rs:310
Nov 25 21:52:26.489 INFO [stdout]   19:     0x55d96c4c6989 - __rust_maybe_catch_panic
Nov 25 21:52:26.489 INFO [stdout]                                at libpanic_unwind/lib.rs:102
Nov 25 21:52:26.489 INFO [stdout]   20:     0x55d96c2d3b2c - <F as alloc::boxed::FnBox<A>>::call_box::hda2a9227f42a1fdf
Nov 25 21:52:26.489 INFO [stdout]                                at libstd/panicking.rs:289
Nov 25 21:52:26.489 INFO [stdout]                                at libstd/panic.rs:392
Nov 25 21:52:26.489 INFO [stdout]                                at libstd/thread/mod.rs:408
Nov 25 21:52:26.489 INFO [stdout]                                at liballoc/boxed.rs:672
Nov 25 21:52:26.489 INFO [stdout]   21:     0x55d96c4b3f1d - std::sys_common::thread::start_thread::h370016c2705244e8
Nov 25 21:52:26.489 INFO [stdout]                                at liballoc/boxed.rs:682
Nov 25 21:52:26.489 INFO [stdout]                                at libstd/sys_common/thread.rs:24
Nov 25 21:52:26.489 INFO [stdout]   22:     0x55d96c4a6f45 - std::sys::unix::thread::Thread::new::thread_start::h4e3dc96e12633ce1
Nov 25 21:52:26.489 INFO [stdout]                                at libstd/sys/unix/thread.rs:90
Nov 25 21:52:26.489 INFO [stdout]   23:     0x7fdb0f3866b9 - start_thread
Nov 25 21:52:26.489 INFO [stdout]   24:     0x7fdb0eea641c - clone
Nov 25 21:52:26.489 INFO [stdout]   25:                0x0 - <unknown>
Nov 25 21:52:26.489 INFO [stdout] 
Nov 25 21:52:26.489 INFO [stdout] ---- get_groups stdout ----
Nov 25 21:52:26.489 INFO [stdout] thread 'get_groups' panicked at 'Error opening file: Os { code: 2, kind: NotFound, message: "No such file or directory" }', libcore/result.rs:1009:5
Nov 25 21:52:26.489 INFO [stdout] stack backtrace:
Nov 25 21:52:26.489 INFO [stdout]    0:     0x55d96c4b202f - std::sys::unix::backtrace::tracing::imp::unwind_backtrace::h4a3f2b0a6aea61f6
Nov 25 21:52:26.489 INFO [stdout]                                at libstd/sys/unix/backtrace/tracing/gcc_s.rs:49
Nov 25 21:52:26.489 INFO [stdout]    1:     0x55d96c4bb757 - std::sys_common::backtrace::print::ha3c126c2ffb9ce84
Nov 25 21:52:26.489 INFO [stdout]                                at libstd/sys_common/backtrace.rs:71
Nov 25 21:52:26.489 INFO [stdout]                                at libstd/sys_common/backtrace.rs:59
Nov 25 21:52:26.489 INFO [stdout]    2:     0x55d96c4b622f - std::panicking::default_hook::{{closure}}::hba1085c5a9c8488f
Nov 25 21:52:26.489 INFO [stdout]                                at libstd/panicking.rs:211
Nov 25 21:52:26.489 INFO [stdout]    3:     0x55d96c4b5f2e - std::panicking::default_hook::hf6bcf2946ff21cec
Nov 25 21:52:26.489 INFO [stdout]                                at libstd/panicking.rs:221
Nov 25 21:52:26.489 INFO [stdout]    4:     0x55d96c4b690e - std::panicking::rust_panic_with_hook::h5e8bedae9879cff4
Nov 25 21:52:26.489 INFO [stdout]                                at libstd/panicking.rs:476
Nov 25 21:52:26.489 INFO [stdout]    5:     0x55d96c4b64b1 - std::panicking::continue_panic_fmt::habd61f37c940cd28
Nov 25 21:52:26.489 INFO [stdout]                                at libstd/panicking.rs:390
Nov 25 21:52:26.489 INFO [stdout]    6:     0x55d96c4b6395 - rust_begin_unwind
Nov 25 21:52:26.489 INFO [stdout]                                at libstd/panicking.rs:325
Nov 25 21:52:26.489 INFO [stdout]    7:     0x55d96c4faa1c - core::panicking::panic_fmt::h9402c42f94a33ab6
Nov 25 21:52:26.489 INFO [stdout]                                at libcore/panicking.rs:77
Nov 25 21:52:26.489 INFO [stdout]    8:     0x55d96c34bf40 - core::result::unwrap_failed::h19bd57e730359b92
Nov 25 21:52:26.489 INFO [stdout]                                at libcore/macros.rs:26
Nov 25 21:52:26.489 INFO [stdout]    9:     0x55d96c2c13c7 - <core::result::Result<T, E>>::expect::h6ea36d2a85e2672f
Nov 25 21:52:26.489 INFO [stdout]                                at libcore/result.rs:835
Nov 25 21:52:26.489 INFO [stdout]   10:     0x55d96c2c22a2 - group_test::common::load_file::hc22d244312fb234f
Nov 25 21:52:26.489 INFO [stdout]                                at tests/common.rs:4
Nov 25 21:52:26.489 INFO [stdout]   11:     0x55d96c2c2345 - group_test::common::get_api::hc89e2ff946256ea7
Nov 25 21:52:26.489 INFO [stdout]                                at tests/common.rs:9
Nov 25 21:52:26.489 INFO [stdout]   12:     0x55d96c2bfc86 - group_test::get_groups::h29b0810152e82043
Nov 25 21:52:26.489 INFO [stdout]                                at tests/group_test.rs:14
Nov 25 21:52:26.489 INFO [stdout]   13:     0x55d96c2bfbd9 - group_test::get_groups::{{closure}}::h5454132f4680ce87
Nov 25 21:52:26.489 INFO [stdout]                                at tests/group_test.rs:7
Nov 25 21:52:26.489 INFO [stdout]   14:     0x55d96c2c04fd - core::ops::function::FnOnce::call_once::h4645a57fb2498230
Nov 25 21:52:26.489 INFO [stdout]                                at libcore/ops/function.rs:238
Nov 25 21:52:26.489 INFO [stdout]   15:     0x55d96c2c405e - <F as alloc::boxed::FnBox<A>>::call_box::h197560f1a673646c
Nov 25 21:52:26.489 INFO [stdout]                                at libtest/lib.rs:1468
Nov 25 21:52:26.489 INFO [stdout]                                at libcore/ops/function.rs:238
Nov 25 21:52:26.489 INFO [stdout]                                at liballoc/boxed.rs:672
Nov 25 21:52:26.489 INFO [stdout]   16:     0x55d96c4c6989 - __rust_maybe_catch_panic
Nov 25 21:52:26.489 INFO [stdout]                                at libpanic_unwind/lib.rs:102
Nov 25 21:52:26.489 INFO [stdout]   17:     0x55d96c2e5e42 - std::sys_common::backtrace::__rust_begin_short_backtrace::hd53fa9cf08c75613
Nov 25 21:52:26.489 INFO [stdout]                                at libstd/panicking.rs:289
Nov 25 21:52:26.489 INFO [stdout]                                at libstd/panic.rs:392
Nov 25 21:52:26.489 INFO [stdout]                                at libtest/lib.rs:1423
Nov 25 21:52:26.489 INFO [stdout]                                at libstd/sys_common/backtrace.rs:136
Nov 25 21:52:26.489 INFO [stdout]   18:     0x55d96c2e68f4 - std::panicking::try::do_call::he795fdeb2cabb605
Nov 25 21:52:26.489 INFO [stdout]                                at libstd/thread/mod.rs:409
Nov 25 21:52:26.489 INFO [stdout]                                at libstd/panic.rs:313
Nov 25 21:52:26.489 INFO [stdout]                                at libstd/panicking.rs:310
Nov 25 21:52:26.489 INFO [stdout]   19:     0x55d96c4c6989 - __rust_maybe_catch_panic
Nov 25 21:52:26.489 INFO [stdout]                                at libpanic_unwind/lib.rs:102
Nov 25 21:52:26.489 INFO [stdout]   20:     0x55d96c2d3b2c - <F as alloc::boxed::FnBox<A>>::call_box::hda2a9227f42a1fdf
Nov 25 21:52:26.489 INFO [stdout]                                at libstd/panicking.rs:289
Nov 25 21:52:26.490 INFO [stdout]                                at libstd/panic.rs:392
Nov 25 21:52:26.490 INFO [stdout]                                at libstd/thread/mod.rs:408
Nov 25 21:52:26.490 INFO [stdout]                                at liballoc/boxed.rs:672
Nov 25 21:52:26.490 INFO [stdout]   21:     0x55d96c4b3f1d - std::sys_common::thread::start_thread::h370016c2705244e8
Nov 25 21:52:26.490 INFO [stdout]                                at liballoc/boxed.rs:682
Nov 25 21:52:26.490 INFO [stdout]                                at libstd/sys_common/thread.rs:24
Nov 25 21:52:26.490 INFO [stdout]   22:     0x55d96c4a6f45 - std::sys::unix::thread::Thread::new::thread_start::h4e3dc96e12633ce1
Nov 25 21:52:26.490 INFO [stdout]                                at libstd/sys/unix/thread.rs:90
Nov 25 21:52:26.490 INFO [stdout]   23:     0x7fdb0f3866b9 - start_thread
Nov 25 21:52:26.490 INFO [stdout]   24:     0x7fdb0eea641c - clone
Nov 25 21:52:26.490 INFO [stdout]   25:                0x0 - <unknown>
Nov 25 21:52:26.490 INFO [stdout] 
Nov 25 21:52:26.510 INFO [stdout] 
Nov 25 21:52:26.510 INFO [stdout] failures:
Nov 25 21:52:26.510 INFO [stdout]     get_groups
Nov 25 21:52:26.510 INFO [stdout]     list_groups
Nov 25 21:52:26.511 INFO [stdout] 
Nov 25 21:52:26.511 INFO [stdout] test result: FAILED. 0 passed; 2 failed; 0 ignored; 0 measured; 0 filtered out
Nov 25 21:52:26.511 INFO [stdout] 
Nov 25 21:52:26.511 INFO [stderr] error: test failed, to rerun pass '--test group_test'
Nov 25 21:52:26.514 INFO [stderr] su: No module specific data is present
Nov 25 21:52:27.986 INFO running `"docker" "inspect" "20a4293bb66f6af81b04712bd8ecd82035a8082ebe9612f38da7e7538fcdacf6"`
Nov 25 21:52:28.402 INFO running `"docker" "rm" "-f" "20a4293bb66f6af81b04712bd8ecd82035a8082ebe9612f38da7e7538fcdacf6"`
Nov 25 21:52:28.640 INFO [stdout] 20a4293bb66f6af81b04712bd8ecd82035a8082ebe9612f38da7e7538fcdacf6