[INFO] fetching crate pcu 0.4.5... [INFO] testing pcu-0.4.5 against beta-2024-09-05 for beta-1.82-1 [INFO] extracting crate pcu 0.4.5 into /workspace/builds/worker-6-tc2/source [INFO] validating manifest of crates.io crate pcu 0.4.5 on toolchain beta-2024-09-05 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2024-09-05" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking crates.io crate pcu 0.4.5 [INFO] finished tweaking crates.io crate pcu 0.4.5 [INFO] tweaked toml for crates.io crate pcu 0.4.5 written to /workspace/builds/worker-6-tc2/source/Cargo.toml [INFO] crate crates.io crate pcu 0.4.5 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" "+beta-2024-09-05" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:96c0aa5895ecf336b730ef27bcdde6e21027415df19888aad3cf1448e5d65d90" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2024-09-05" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 87e52472958f7c0dd58bdf6ce68646cd1bee40feae9d0f63042972e7a447bf90 [INFO] running `Command { std: "docker" "start" "-a" "87e52472958f7c0dd58bdf6ce68646cd1bee40feae9d0f63042972e7a447bf90", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "87e52472958f7c0dd58bdf6ce68646cd1bee40feae9d0f63042972e7a447bf90", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "87e52472958f7c0dd58bdf6ce68646cd1bee40feae9d0f63042972e7a447bf90", kill_on_drop: false }` [INFO] [stdout] 87e52472958f7c0dd58bdf6ce68646cd1bee40feae9d0f63042972e7a447bf90 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:96c0aa5895ecf336b730ef27bcdde6e21027415df19888aad3cf1448e5d65d90" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2024-09-05" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] b23f5002c903fa6a1b787a6e69cf6a3c4d0ba2084cf923e4786358a49e27fa9f [INFO] running `Command { std: "docker" "start" "-a" "b23f5002c903fa6a1b787a6e69cf6a3c4d0ba2084cf923e4786358a49e27fa9f", kill_on_drop: false }` [INFO] [stderr] Compiling serde v1.0.208 [INFO] [stderr] Compiling futures-task v0.3.30 [INFO] [stderr] Compiling num-traits v0.2.19 [INFO] [stderr] Compiling strsim v0.11.1 [INFO] [stderr] Compiling quote v1.0.36 [INFO] [stderr] Compiling futures-channel v0.3.30 [INFO] [stderr] Compiling serde_json v1.0.125 [INFO] [stderr] Compiling smallvec v1.13.2 [INFO] [stderr] Compiling jobserver v0.1.32 [INFO] [stderr] Compiling socket2 v0.5.7 [INFO] [stderr] Compiling mio v1.0.2 [INFO] [stderr] Compiling getrandom v0.2.15 [INFO] [stderr] Compiling http v1.1.0 [INFO] [stderr] Compiling rustls-pki-types v1.8.0 [INFO] [stderr] Compiling regex-automata v0.4.7 [INFO] [stderr] Compiling tiny-keccak v2.0.2 [INFO] [stderr] Compiling futures-util v0.3.30 [INFO] [stderr] Compiling syn v2.0.74 [INFO] [stderr] Compiling cc v1.1.11 [INFO] [stderr] Compiling rustls v0.23.12 [INFO] [stderr] Compiling atomic-waker v1.1.2 [INFO] [stderr] Compiling subtle v2.6.1 [INFO] [stderr] Compiling tower-layer v0.3.3 [INFO] [stderr] Compiling anstyle-parse v0.2.5 [INFO] [stderr] Compiling regex-automata v0.1.10 [INFO] [stderr] Compiling is_terminal_polyfill v1.70.1 [INFO] [stderr] Compiling colorchoice v1.0.2 [INFO] [stderr] Compiling overload v0.1.1 [INFO] [stderr] Compiling ipnet v2.9.0 [INFO] [stderr] Compiling const-random-macro v0.1.16 [INFO] [stderr] Compiling anstyle-query v1.1.1 [INFO] [stderr] Compiling nu-ansi-term v0.46.0 [INFO] [stderr] Compiling webpki-roots v0.26.3 [INFO] [stderr] Compiling anstream v0.6.15 [INFO] [stderr] Compiling tracing-log v0.2.0 [INFO] [stderr] Compiling eyre v0.6.12 [INFO] [stderr] Compiling syn v1.0.109 [INFO] [stderr] Compiling pem v3.0.4 [INFO] [stderr] Compiling rustls-pemfile v2.1.3 [INFO] [stderr] Compiling http-body v1.0.1 [INFO] [stderr] Compiling hashbrown v0.13.2 [INFO] [stderr] Compiling indenter v0.3.3 [INFO] [stderr] Compiling sync_wrapper v1.0.1 [INFO] [stderr] Compiling winnow v0.6.18 [INFO] [stderr] Compiling gimli v0.28.1 [INFO] [stderr] Compiling const-random v0.1.18 [INFO] [stderr] Compiling miniz_oxide v0.7.4 [INFO] [stderr] Compiling clap_builder v4.5.15 [INFO] [stderr] Compiling dlv-list v0.5.2 [INFO] [stderr] Compiling matchers v0.1.0 [INFO] [stderr] Compiling semver v1.0.23 [INFO] [stderr] Compiling object v0.32.2 [INFO] [stderr] Compiling bytemuck v1.17.1 [INFO] [stderr] Compiling linked-hash-map v0.5.6 [INFO] [stderr] Compiling num-integer v0.1.46 [INFO] [stderr] Compiling chrono v0.4.38 [INFO] [stderr] Compiling ordered-multimap v0.6.0 [INFO] [stderr] Compiling unicode-segmentation v1.11.0 [INFO] [stderr] Compiling sync_wrapper v0.1.2 [INFO] [stderr] Compiling owo-colors v3.5.0 [INFO] [stderr] Compiling rustc-demangle v0.1.24 [INFO] [stderr] Compiling rust-ini v0.19.0 [INFO] [stderr] Compiling num-bigint v0.4.6 [INFO] [stderr] Compiling convert_case v0.6.0 [INFO] [stderr] Compiling openssl-sys v0.9.103 [INFO] [stderr] Compiling ring v0.17.8 [INFO] [stderr] Compiling regex v1.10.6 [INFO] [stderr] Compiling libz-sys v1.1.19 [INFO] [stderr] Compiling libssh2-sys v0.3.0 [INFO] [stderr] Compiling http-body-util v0.1.2 [INFO] [stderr] Compiling backtrace v0.3.71 [INFO] [stderr] Compiling libgit2-sys v0.17.0+1.8.1 [INFO] [stderr] Compiling env_filter v0.1.2 [INFO] [stderr] Compiling yaml-rust v0.4.5 [INFO] [stderr] Compiling openssl v0.10.66 [INFO] [stderr] Compiling native-tls v0.2.12 [INFO] [stderr] Compiling addr2line v0.21.0 [INFO] [stderr] Compiling pathdiff v0.2.1 [INFO] [stderr] Compiling env_logger v0.11.5 [INFO] [stderr] Compiling derive-getters v0.3.0 [INFO] [stderr] Compiling darling_core v0.20.10 [INFO] [stderr] Compiling serde_derive v1.0.208 [INFO] [stderr] Compiling tokio-macros v2.4.0 [INFO] [stderr] Compiling tracing-attributes v0.1.27 [INFO] [stderr] Compiling thiserror-impl v1.0.63 [INFO] [stderr] Compiling pin-project-internal v1.1.5 [INFO] [stderr] Compiling openssl-macros v0.1.1 [INFO] [stderr] Compiling typed-builder-macro v0.18.2 [INFO] [stderr] Compiling clap_derive v4.5.13 [INFO] [stderr] Compiling async-trait v0.1.81 [INFO] [stderr] Compiling tokio v1.39.2 [INFO] [stderr] Compiling rustls-webpki v0.102.6 [INFO] [stderr] Compiling thiserror v1.0.63 [INFO] [stderr] Compiling pest v2.7.11 [INFO] [stderr] Compiling simple_asn1 v0.6.2 [INFO] [stderr] Compiling tracing v0.1.40 [INFO] [stderr] Compiling pin-project v1.1.5 [INFO] [stderr] Compiling darling_macro v0.20.10 [INFO] [stderr] Compiling tracing-subscriber v0.3.18 [INFO] [stderr] Compiling typed-builder v0.18.2 [INFO] [stderr] Compiling clap v4.5.15 [INFO] [stderr] Compiling darling v0.20.10 [INFO] [stderr] Compiling clap-verbosity-flag v2.2.1 [INFO] [stderr] Compiling derive_builder_core v0.20.0 [INFO] [stderr] Compiling derive_setters v0.1.6 [INFO] [stderr] Compiling pest_meta v2.7.11 [INFO] [stderr] Compiling derive_builder_macro v0.20.0 [INFO] [stderr] Compiling tracing-error v0.2.0 [INFO] [stderr] Compiling color-spantrace v0.2.1 [INFO] [stderr] Compiling pest_generator v2.7.11 [INFO] [stderr] Compiling color-eyre v0.6.3 [INFO] [stderr] Compiling derive_builder v0.20.0 [INFO] [stderr] Compiling keep-a-changelog v0.1.4 [INFO] [stderr] Compiling pest_derive v2.7.11 [INFO] [stderr] Compiling tokio-util v0.7.11 [INFO] [stderr] Compiling tower v0.4.13 [INFO] [stderr] Compiling tokio-rustls v0.26.0 [INFO] [stderr] Compiling h2 v0.4.5 [INFO] [stderr] Compiling h2 v0.3.26 [INFO] [stderr] Compiling bitflags v2.6.0 [INFO] [stderr] Compiling serde_urlencoded v0.7.1 [INFO] [stderr] Compiling toml_datetime v0.6.8 [INFO] [stderr] Compiling serde_spanned v0.6.7 [INFO] [stderr] Compiling ron v0.8.1 [INFO] [stderr] Compiling json5 v0.4.1 [INFO] [stderr] Compiling toml_edit v0.22.20 [INFO] [stderr] Compiling rgb v0.8.50 [INFO] [stderr] Compiling jsonwebtoken v9.3.0 [INFO] [stderr] Compiling octocrate-types v2.0.1 [INFO] [stderr] Compiling named-colour v0.3.0 [INFO] [stderr] Compiling toml v0.8.19 [INFO] [stderr] Compiling hyper v0.14.30 [INFO] [stderr] Compiling hyper v1.4.1 [INFO] [stderr] Compiling config v0.14.0 [INFO] [stderr] Compiling tokio-native-tls v0.3.1 [INFO] [stderr] Compiling hyper-util v0.1.7 [INFO] [stderr] Compiling git2 v0.19.0 [INFO] [stderr] Compiling hyper-rustls v0.27.2 [INFO] [stderr] Compiling reqwest v0.12.5 [INFO] [stderr] Compiling hyper-tls v0.5.0 [INFO] [stderr] Compiling reqwest v0.11.27 [INFO] [stderr] Compiling gql_client v1.0.7 [INFO] [stderr] Compiling octocrate-core v0.1.7 [INFO] [stderr] Compiling octocrate v2.0.1 [INFO] [stderr] Compiling pcu v0.4.5 (/opt/rustwide/workdir) [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 1m 02s [INFO] running `Command { std: "docker" "inspect" "b23f5002c903fa6a1b787a6e69cf6a3c4d0ba2084cf923e4786358a49e27fa9f", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "b23f5002c903fa6a1b787a6e69cf6a3c4d0ba2084cf923e4786358a49e27fa9f", kill_on_drop: false }` [INFO] [stdout] b23f5002c903fa6a1b787a6e69cf6a3c4d0ba2084cf923e4786358a49e27fa9f [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:96c0aa5895ecf336b730ef27bcdde6e21027415df19888aad3cf1448e5d65d90" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2024-09-05" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] f4e48e317b93f22c98da79323fb2f5362b06ec6949d13cb2b226a3c9ffc7b6dc [INFO] running `Command { std: "docker" "start" "-a" "f4e48e317b93f22c98da79323fb2f5362b06ec6949d13cb2b226a3c9ffc7b6dc", kill_on_drop: false }` [INFO] [stderr] Compiling syn v2.0.74 [INFO] [stderr] Compiling syn v1.0.109 [INFO] [stderr] Compiling rustc_version v0.4.0 [INFO] [stderr] Compiling winnow v0.5.40 [INFO] [stderr] Compiling toml_datetime v0.6.8 [INFO] [stderr] Compiling thread-id v4.2.2 [INFO] [stderr] Compiling arc-swap v1.7.1 [INFO] [stderr] Compiling log-mdc v0.1.0 [INFO] [stderr] Compiling relative-path v1.9.3 [INFO] [stderr] Compiling futures-timer v3.0.3 [INFO] [stderr] Compiling uuid v1.10.0 [INFO] [stderr] Compiling rstest_macros v0.22.0 [INFO] [stderr] Compiling toml_edit v0.21.1 [INFO] [stderr] Compiling derive-getters v0.3.0 [INFO] [stderr] Compiling derivative v2.2.0 [INFO] [stderr] Compiling proc-macro-crate v3.1.0 [INFO] [stderr] Compiling darling_core v0.20.10 [INFO] [stderr] Compiling serde_derive v1.0.208 [INFO] [stderr] Compiling tokio-macros v2.4.0 [INFO] [stderr] Compiling tracing-attributes v0.1.27 [INFO] [stderr] Compiling futures-macro v0.3.30 [INFO] [stderr] Compiling thiserror-impl v1.0.63 [INFO] [stderr] Compiling pin-project-internal v1.1.5 [INFO] [stderr] Compiling openssl-macros v0.1.1 [INFO] [stderr] Compiling typed-builder-macro v0.18.2 [INFO] [stderr] Compiling clap_derive v4.5.13 [INFO] [stderr] Compiling async-trait v0.1.81 [INFO] [stderr] Compiling tokio v1.39.2 [INFO] [stderr] Compiling futures-util v0.3.30 [INFO] [stderr] Compiling darling_macro v0.20.10 [INFO] [stderr] Compiling pin-project v1.1.5 [INFO] [stderr] Compiling thiserror v1.0.63 [INFO] [stderr] Compiling pest v2.7.11 [INFO] [stderr] Compiling simple_asn1 v0.6.2 [INFO] [stderr] Compiling log4rs v1.3.0 [INFO] [stderr] Compiling typed-builder v0.18.2 [INFO] [stderr] Compiling log4rs_test_utils v0.2.3 [INFO] [stderr] Compiling tracing v0.1.40 [INFO] [stderr] Compiling darling v0.20.10 [INFO] [stderr] Compiling tracing-subscriber v0.3.18 [INFO] [stderr] Compiling derive_builder_core v0.20.0 [INFO] [stderr] Compiling clap v4.5.15 [INFO] [stderr] Compiling derive_setters v0.1.6 [INFO] [stderr] Compiling clap-verbosity-flag v2.2.1 [INFO] [stderr] Compiling serde v1.0.208 [INFO] [stderr] Compiling pest_meta v2.7.11 [INFO] [stderr] Compiling derive_builder_macro v0.20.0 [INFO] [stderr] Compiling tracing-error v0.2.0 [INFO] [stderr] Compiling pest_generator v2.7.11 [INFO] [stderr] Compiling color-spantrace v0.2.1 [INFO] [stderr] Compiling derive_builder v0.20.0 [INFO] [stderr] Compiling keep-a-changelog v0.1.4 [INFO] [stderr] Compiling color-eyre v0.6.3 [INFO] [stderr] Compiling http-body-util v0.1.2 [INFO] [stderr] Compiling futures-executor v0.3.30 [INFO] [stderr] Compiling futures v0.3.30 [INFO] [stderr] Compiling rstest v0.22.0 [INFO] [stderr] Compiling pest_derive v2.7.11 [INFO] [stderr] Compiling tokio-util v0.7.11 [INFO] [stderr] Compiling tower v0.4.13 [INFO] [stderr] Compiling tokio-rustls v0.26.0 [INFO] [stderr] Compiling h2 v0.4.5 [INFO] [stderr] Compiling h2 v0.3.26 [INFO] [stderr] Compiling bitflags v2.6.0 [INFO] [stderr] Compiling serde_json v1.0.125 [INFO] [stderr] Compiling serde_urlencoded v0.7.1 [INFO] [stderr] Compiling serde_spanned v0.6.7 [INFO] [stderr] Compiling rgb v0.8.50 [INFO] [stderr] Compiling json5 v0.4.1 [INFO] [stderr] Compiling openssl v0.10.66 [INFO] [stderr] Compiling ron v0.8.1 [INFO] [stderr] Compiling git2 v0.19.0 [INFO] [stderr] Compiling toml_edit v0.22.20 [INFO] [stderr] Compiling named-colour v0.3.0 [INFO] [stderr] Compiling jsonwebtoken v9.3.0 [INFO] [stderr] Compiling octocrate-types v2.0.1 [INFO] [stderr] Compiling toml v0.8.19 [INFO] [stderr] Compiling hyper v1.4.1 [INFO] [stderr] Compiling hyper v0.14.30 [INFO] [stderr] Compiling config v0.14.0 [INFO] [stderr] Compiling native-tls v0.2.12 [INFO] [stderr] Compiling hyper-util v0.1.7 [INFO] [stderr] Compiling tokio-native-tls v0.3.1 [INFO] [stderr] Compiling hyper-rustls v0.27.2 [INFO] [stderr] Compiling reqwest v0.12.5 [INFO] [stderr] Compiling hyper-tls v0.5.0 [INFO] [stderr] Compiling reqwest v0.11.27 [INFO] [stderr] Compiling gql_client v1.0.7 [INFO] [stderr] error: could not compile `octocrate-types` (lib) [INFO] [stderr] [INFO] [stderr] Caused by: [INFO] [stderr] process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/beta-2024-09-05-x86_64-unknown-linux-gnu/bin/rustc --crate-name octocrate_types --edition=2021 /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/octocrate-types-2.0.1/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="apps"' --cfg 'feature="pulls"' --cfg 'feature="repos"' --check-cfg 'cfg(docsrs)' --check-cfg 'cfg(feature, values("actions", "activity", "apps", "billing", "checks", "classroom", "code_scanning", "codes_of_conduct", "codespaces", "copilot", "dependabot", "dependency_graph", "desktop", "emojis", "full", "gists", "git", "gitignore", "interactions", "issues", "licenses", "markdown", "merge_queue", "meta", "migrations", "oidc", "orgs", "packages", "pagination", "projects", "pulls", "rate_limit", "reactions", "repos", "search", "secret_scanning", "security_advisories", "teams", "users", "webhooks"))' -C metadata=73d2daf2d456a9f4 -C extra-filename=-73d2daf2d456a9f4 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern chrono=/opt/rustwide/target/debug/deps/libchrono-22507353070d83ab.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-3384765b1bac1f78.rmeta --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-2799008049803d5b.rmeta --extern typed_builder=/opt/rustwide/target/debug/deps/libtyped_builder-bc01e46bc5e9ff2e.rmeta --cap-lints allow --cap-lints=warn` (signal: 9, SIGKILL: kill) [INFO] running `Command { std: "docker" "inspect" "f4e48e317b93f22c98da79323fb2f5362b06ec6949d13cb2b226a3c9ffc7b6dc", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "f4e48e317b93f22c98da79323fb2f5362b06ec6949d13cb2b226a3c9ffc7b6dc", kill_on_drop: false }` [INFO] [stdout] f4e48e317b93f22c98da79323fb2f5362b06ec6949d13cb2b226a3c9ffc7b6dc