[INFO] cloning repository https://github.com/hackermondev/hackerone-tracker
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/hackermondev/hackerone-tracker" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhackermondev%2Fhackerone-tracker", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhackermondev%2Fhackerone-tracker'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] cbf9721a327dc1519e3828d5c3b95d64609c2a5b
[INFO] testing hackermondev/hackerone-tracker against try#a7ce54db9b096bd1098d07c645b489195a667c9f for pr-137940-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhackermondev%2Fhackerone-tracker" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/hackermondev/hackerone-tracker on toolchain a7ce54db9b096bd1098d07c645b489195a667c9f
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a7ce54db9b096bd1098d07c645b489195a667c9f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/hackermondev/hackerone-tracker
[INFO] finished tweaking git repo https://github.com/hackermondev/hackerone-tracker
[INFO] tweaked toml for git repo https://github.com/hackermondev/hackerone-tracker written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/hackermondev/hackerone-tracker 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" "+a7ce54db9b096bd1098d07c645b489195a667c9f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+a7ce54db9b096bd1098d07c645b489195a667c9f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ed178ee3a86e5116ff597411b16f9f1265d04719ae0c1f3be9d78f5881fe972b
[INFO] running `Command { std: "docker" "start" "-a" "ed178ee3a86e5116ff597411b16f9f1265d04719ae0c1f3be9d78f5881fe972b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ed178ee3a86e5116ff597411b16f9f1265d04719ae0c1f3be9d78f5881fe972b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ed178ee3a86e5116ff597411b16f9f1265d04719ae0c1f3be9d78f5881fe972b", kill_on_drop: false }`
[INFO] [stdout] ed178ee3a86e5116ff597411b16f9f1265d04719ae0c1f3be9d78f5881fe972b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+a7ce54db9b096bd1098d07c645b489195a667c9f" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 77991a924ff9329b0a9ef97e19bbd26e5b2212b7c75a208be2ea06bf3b93e979
[INFO] running `Command { std: "docker" "start" "-a" "77991a924ff9329b0a9ef97e19bbd26e5b2212b7c75a208be2ea06bf3b93e979", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.93
[INFO] [stderr]    Compiling unicode-ident v1.0.13
[INFO] [stderr]    Compiling libc v0.2.159
[INFO] [stderr]    Compiling parking_lot_core v0.9.10
[INFO] [stderr]    Compiling pin-project-lite v0.2.14
[INFO] [stderr]    Compiling bytes v1.7.2
[INFO] [stderr]    Compiling smallvec v1.13.2
[INFO] [stderr]    Compiling scopeguard v1.2.0
[INFO] [stderr]    Compiling itoa v1.0.11
[INFO] [stderr]    Compiling futures-core v0.3.31
[INFO] [stderr]    Compiling serde v1.0.210
[INFO] [stderr]    Compiling futures-sink v0.3.31
[INFO] [stderr]    Compiling once_cell v1.20.2
[INFO] [stderr]    Compiling lock_api v0.4.12
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling slab v0.4.9
[INFO] [stderr]    Compiling ryu v1.0.18
[INFO] [stderr]    Compiling cc v1.1.30
[INFO] [stderr]    Compiling pin-utils v0.1.0
[INFO] [stderr]    Compiling futures-task v0.3.31
[INFO] [stderr]    Compiling either v1.13.0
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]    Compiling tinyvec v1.8.0
[INFO] [stderr]    Compiling rustls-pki-types v1.10.1
[INFO] [stderr]    Compiling percent-encoding v2.3.1
[INFO] [stderr]    Compiling serde_json v1.0.128
[INFO] [stderr]    Compiling tracing-core v0.1.32
[INFO] [stderr]    Compiling spin v0.9.8
[INFO] [stderr]    Compiling memchr v2.7.4
[INFO] [stderr]    Compiling hashbrown v0.15.0
[INFO] [stderr]    Compiling equivalent v1.0.1
[INFO] [stderr]    Compiling form_urlencoded v1.2.1
[INFO] [stderr]    Compiling unicode-bidi v0.3.17
[INFO] [stderr]    Compiling thiserror v1.0.64
[INFO] [stderr]    Compiling httparse v1.9.5
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling untrusted v0.9.0
[INFO] [stderr]    Compiling tracing v0.1.40
[INFO] [stderr]    Compiling unreachable v1.0.0
[INFO] [stderr]    Compiling http v1.2.0
[INFO] [stderr]    Compiling rustls v0.23.21
[INFO] [stderr]    Compiling atomic-waker v1.1.2
[INFO] [stderr]    Compiling try-lock v0.2.5
[INFO] [stderr]    Compiling ascii v0.9.3
[INFO] [stderr]    Compiling byteorder v1.5.0
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling want v0.3.1
[INFO] [stderr]    Compiling futures-channel v0.3.31
[INFO] [stderr]    Compiling aho-corasick v1.1.3
[INFO] [stderr]    Compiling zeroize v1.8.1
[INFO] [stderr]    Compiling unicode-normalization v0.1.24
[INFO] [stderr]    Compiling quote v1.0.37
[INFO] [stderr]    Compiling indexmap v2.6.0
[INFO] [stderr]    Compiling combine v3.8.1
[INFO] [stderr]    Compiling tower-service v0.3.3
[INFO] [stderr]    Compiling syn v2.0.96
[INFO] [stderr]    Compiling subtle v2.6.1
[INFO] [stderr]    Compiling regex-syntax v0.8.5
[INFO] [stderr]    Compiling utf8parse v0.2.2
[INFO] [stderr]    Compiling heck v0.4.1
[INFO] [stderr]    Compiling powerfmt v0.2.0
[INFO] [stderr]    Compiling iana-time-zone v0.1.61
[INFO] [stderr]    Compiling num-integer v0.1.46
[INFO] [stderr]    Compiling log v0.4.22
[INFO] [stderr]    Compiling lazy_static v1.5.0
[INFO] [stderr]    Compiling signal-hook-registry v1.4.2
[INFO] [stderr]    Compiling mio v1.0.2
[INFO] [stderr]    Compiling socket2 v0.5.7
[INFO] [stderr]    Compiling getrandom v0.2.15
[INFO] [stderr]    Compiling ring v0.17.8
[INFO] [stderr]    Compiling http-body v1.0.1
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling idna v0.5.0
[INFO] [stderr]    Compiling parking_lot v0.12.3
[INFO] [stderr]    Compiling num-bigint v0.4.6
[INFO] [stderr]    Compiling num_cpus v1.16.0
[INFO] [stderr]    Compiling deranged v0.3.11
[INFO] [stderr]    Compiling chrono v0.4.38
[INFO] [stderr]    Compiling ordered-float v2.10.1
[INFO] [stderr]    Compiling anstyle-parse v0.2.5
[INFO] [stderr]    Compiling webpki-roots v0.26.7
[INFO] [stderr]    Compiling itertools v0.13.0
[INFO] [stderr]    Compiling sync_wrapper v1.0.2
[INFO] [stderr]    Compiling url v2.5.2
[INFO] [stderr]    Compiling is_terminal_polyfill v1.70.1
[INFO] [stderr]    Compiling time-core v0.1.2
[INFO] [stderr]    Compiling num-conv v0.1.0
[INFO] [stderr]    Compiling anstyle-query v1.1.1
[INFO] [stderr]    Compiling anstyle v1.0.8
[INFO] [stderr]    Compiling tower-layer v0.3.3
[INFO] [stderr]    Compiling arc-swap v1.7.1
[INFO] [stderr]    Compiling colorchoice v1.0.2
[INFO] [stderr]    Compiling socket2 v0.4.10
[INFO] [stderr]    Compiling anstream v0.6.15
[INFO] [stderr]    Compiling is-terminal v0.4.13
[INFO] [stderr]    Compiling rustls-pemfile v2.2.0
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling termcolor v1.4.1
[INFO] [stderr]    Compiling sha1_smol v1.0.1
[INFO] [stderr]    Compiling time v0.3.36
[INFO] [stderr]    Compiling humantime v2.1.0
[INFO] [stderr]    Compiling mime v0.3.17
[INFO] [stderr]    Compiling minimal-lexical v0.2.1
[INFO] [stderr]    Compiling base64 v0.22.1
[INFO] [stderr]    Compiling strsim v0.11.1
[INFO] [stderr]    Compiling heck v0.5.0
[INFO] [stderr]    Compiling clap_lex v0.7.2
[INFO] [stderr]    Compiling ipnet v2.10.1
[INFO] [stderr]    Compiling nom v7.1.3
[INFO] [stderr]    Compiling clap_builder v4.5.20
[INFO] [stderr]    Compiling regex-automata v0.4.8
[INFO] [stderr]    Compiling tokio-macros v2.4.0
[INFO] [stderr]    Compiling serde_derive v1.0.210
[INFO] [stderr]    Compiling futures-macro v0.3.31
[INFO] [stderr]    Compiling thiserror-impl v1.0.64
[INFO] [stderr]    Compiling zerocopy-derive v0.7.35
[INFO] [stderr]    Compiling async-trait v0.1.85
[INFO] [stderr]    Compiling serde_repr v0.1.19
[INFO] [stderr]    Compiling clap_derive v4.5.18
[INFO] [stderr]    Compiling futures-util v0.3.31
[INFO] [stderr]    Compiling tokio v1.40.0
[INFO] [stderr]    Compiling zerocopy v0.7.35
[INFO] [stderr]    Compiling cron v0.11.0
[INFO] [stderr]    Compiling graphql-parser v0.4.0
[INFO] [stderr]    Compiling cronjob v0.4.17
[INFO] [stderr]    Compiling regex v1.11.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.20
[INFO] [stderr]    Compiling rustls-webpki v0.102.8
[INFO] [stderr]    Compiling clap v4.5.20
[INFO] [stderr]    Compiling env_logger v0.10.2
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling pretty_env_logger v0.5.0
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling http-body-util v0.1.2
[INFO] [stderr]    Compiling nanoid v0.4.0
[INFO] [stderr]    Compiling tokio-util v0.7.12
[INFO] [stderr]    Compiling tokio-rustls v0.26.1
[INFO] [stderr]    Compiling deadpool-runtime v0.1.4
[INFO] [stderr]    Compiling tower v0.5.2
[INFO] [stderr]    Compiling deadpool v0.12.1
[INFO] [stderr]    Compiling graphql-introspection-query v0.2.0
[INFO] [stderr]    Compiling serde_urlencoded v0.7.1
[INFO] [stderr]    Compiling serde-value v0.7.0
[INFO] [stderr]    Compiling twilight-model v0.15.4
[INFO] [stderr]    Compiling h2 v0.4.7
[INFO] [stderr]    Compiling combine v4.6.7
[INFO] [stderr]    Compiling graphql_client_codegen v0.12.0
[INFO] [stderr]    Compiling hyper v1.5.2
[INFO] [stderr]    Compiling graphql_query_derive v0.12.0
[INFO] [stderr]    Compiling hyper-util v0.1.10
[INFO] [stderr]    Compiling graphql_client v0.12.0
[INFO] [stderr]    Compiling redis v0.27.6
[INFO] [stderr]    Compiling redis v0.23.3
[INFO] [stderr]    Compiling hyper-rustls v0.27.5
[INFO] [stderr]    Compiling reqwest v0.12.12
[INFO] [stderr]    Compiling deadpool-redis v0.18.0
[INFO] [stderr]    Compiling twilight-validate v0.15.3
[INFO] [stderr]    Compiling security_api v0.1.0 (/opt/rustwide/workdir/src/security_api)
[INFO] [stderr]    Compiling twilight-util v0.15.4
[INFO] [stderr]    Compiling security_poller v0.1.0 (/opt/rustwide/workdir/src/security_poller)
[INFO] [stderr]    Compiling security_discord v0.1.0 (/opt/rustwide/workdir/src/security_discord)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1m 20s
[INFO] running `Command { std: "docker" "inspect" "77991a924ff9329b0a9ef97e19bbd26e5b2212b7c75a208be2ea06bf3b93e979", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "77991a924ff9329b0a9ef97e19bbd26e5b2212b7c75a208be2ea06bf3b93e979", kill_on_drop: false }`
[INFO] [stdout] 77991a924ff9329b0a9ef97e19bbd26e5b2212b7c75a208be2ea06bf3b93e979
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+a7ce54db9b096bd1098d07c645b489195a667c9f" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f4420a7ae4b117a25a0bad24acf29993221cc30a2c6f17d2a22f6d6b15fd0f5a
[INFO] running `Command { std: "docker" "start" "-a" "f4420a7ae4b117a25a0bad24acf29993221cc30a2c6f17d2a22f6d6b15fd0f5a", kill_on_drop: false }`
[INFO] [stderr]    Compiling security_api v0.1.0 (/opt/rustwide/workdir/src/security_api)
[INFO] [stderr]    Compiling security_poller v0.1.0 (/opt/rustwide/workdir/src/security_poller)
[INFO] [stderr]    Compiling security_discord v0.1.0 (/opt/rustwide/workdir/src/security_discord)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 3.74s
[INFO] running `Command { std: "docker" "inspect" "f4420a7ae4b117a25a0bad24acf29993221cc30a2c6f17d2a22f6d6b15fd0f5a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f4420a7ae4b117a25a0bad24acf29993221cc30a2c6f17d2a22f6d6b15fd0f5a", kill_on_drop: false }`
[INFO] [stdout] f4420a7ae4b117a25a0bad24acf29993221cc30a2c6f17d2a22f6d6b15fd0f5a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+a7ce54db9b096bd1098d07c645b489195a667c9f" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] a08c0afea7ad858559144170f408c24e8ab614867cd9960c7a8cbaa282174fc6
[INFO] running `Command { std: "docker" "start" "-a" "a08c0afea7ad858559144170f408c24e8ab614867cd9960c7a8cbaa282174fc6", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.23s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/security_api-d7c124fc5bc6354e)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test hackerone::tests::can_extract_csrf_token ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/security_discord-87aa1b062e1480c5)
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test breakdown::tests::none ... ok
[INFO] [stdout] test breakdown::tests::simple ... ok
[INFO] [stdout] test breakdown::tests::negative ... ok
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/security_poller-aa156ce776fb52b6)
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[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 security_api
[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" "a08c0afea7ad858559144170f408c24e8ab614867cd9960c7a8cbaa282174fc6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a08c0afea7ad858559144170f408c24e8ab614867cd9960c7a8cbaa282174fc6", kill_on_drop: false }`
[INFO] [stdout] a08c0afea7ad858559144170f408c24e8ab614867cd9960c7a8cbaa282174fc6