[INFO] fetching crate rustencils 0.1.6... [INFO] checking rustencils-0.1.6 against master#ff1737bb00913444173658b4e0b274fd79aabf66 for pr-132712-1 [INFO] extracting crate rustencils 0.1.6 into /workspace/builds/worker-0-tc1/source [INFO] validating manifest of crates.io crate rustencils 0.1.6 on toolchain ff1737bb00913444173658b4e0b274fd79aabf66 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ff1737bb00913444173658b4e0b274fd79aabf66" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking crates.io crate rustencils 0.1.6 [INFO] finished tweaking crates.io crate rustencils 0.1.6 [INFO] tweaked toml for crates.io crate rustencils 0.1.6 written to /workspace/builds/worker-0-tc1/source/Cargo.toml [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ff1737bb00913444173658b4e0b274fd79aabf66" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Updating crates.io index [INFO] [stderr] Locking 151 packages to latest compatible versions [INFO] [stderr] Adding factorial v0.2.1 (available: v0.4.0) [INFO] [stderr] Adding ndarray v0.14.0 (available: v0.16.1) [INFO] [stderr] Adding ndarray-linalg v0.13.1 (available: v0.16.0) [INFO] [stderr] Adding zstd-sys v1.4.18+zstd.1.4.7 (available: v1.6.3+zstd.1.5.2) [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ff1737bb00913444173658b4e0b274fd79aabf66" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded ndarray-linalg v0.13.1 [INFO] [stderr] Downloaded intel-mkl-src v0.6.0+mkl2020.1 [INFO] [stderr] Downloaded blas-src v0.6.1 [INFO] [stderr] Downloaded lax v0.1.0 [INFO] [stderr] Downloaded cauchy v0.3.0 [INFO] [stderr] Downloaded intel-mkl-tool v0.2.0+mkl2020.1 [INFO] [stderr] Downloaded lapack v0.17.0 [INFO] [stderr] Downloaded netlib-src v0.8.0 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+ff1737bb00913444173658b4e0b274fd79aabf66" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] f6a5775a9383828519918cb07fc23b684d92c44cfaee05460c17054d5b869d09 [INFO] running `Command { std: "docker" "start" "-a" "f6a5775a9383828519918cb07fc23b684d92c44cfaee05460c17054d5b869d09", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "f6a5775a9383828519918cb07fc23b684d92c44cfaee05460c17054d5b869d09", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "f6a5775a9383828519918cb07fc23b684d92c44cfaee05460c17054d5b869d09", kill_on_drop: false }` [INFO] [stdout] f6a5775a9383828519918cb07fc23b684d92c44cfaee05460c17054d5b869d09 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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=allow" "-e" "RUSTDOCFLAGS=--cap-lints=allow" "-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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+ff1737bb00913444173658b4e0b274fd79aabf66" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 73a18f79b62cbd90b5f9158dfc3fd77aa6ff952fe4c68c2d291b07e4d9ae9ec3 [INFO] running `Command { std: "docker" "start" "-a" "73a18f79b62cbd90b5f9158dfc3fd77aa6ff952fe4c68c2d291b07e4d9ae9ec3", kill_on_drop: false }` [INFO] [stderr] Compiling stable_deref_trait v1.2.0 [INFO] [stderr] Compiling writeable v0.5.5 [INFO] [stderr] Compiling litemap v0.7.4 [INFO] [stderr] Compiling libc v0.2.164 [INFO] [stderr] Compiling icu_locid_transform_data v1.5.0 [INFO] [stderr] Compiling syn v2.0.89 [INFO] [stderr] Compiling openssl-sys v0.9.104 [INFO] [stderr] Compiling icu_properties_data v1.5.0 [INFO] [stderr] Compiling num-traits v0.2.19 [INFO] [stderr] Compiling getrandom v0.1.16 [INFO] [stderr] Compiling smallvec v1.13.2 [INFO] [stderr] Compiling icu_normalizer_data v1.5.0 [INFO] [stderr] Compiling write16 v1.0.0 [INFO] [stderr] Compiling utf16_iter v1.0.5 [INFO] [stderr] Compiling utf8_iter v1.0.4 [INFO] [stderr] Checking byteorder v1.5.0 [INFO] [stderr] Compiling foreign-types-shared v0.1.1 [INFO] [stderr] Compiling rustix v0.38.41 [INFO] [stderr] Compiling foreign-types v0.3.2 [INFO] [stderr] Compiling openssl v0.10.68 [INFO] [stderr] Compiling openssl-probe v0.1.5 [INFO] [stderr] Compiling adler2 v2.0.0 [INFO] [stderr] Compiling percent-encoding v2.3.1 [INFO] [stderr] Compiling rustls-pki-types v1.10.0 [INFO] [stderr] Compiling linux-raw-sys v0.4.14 [INFO] [stderr] Checking rand_core v0.5.1 [INFO] [stderr] Compiling form_urlencoded v1.2.1 [INFO] [stderr] Compiling native-tls v0.2.12 [INFO] [stderr] Compiling miniz_oxide v0.8.0 [INFO] [stderr] Compiling crc32fast v1.4.2 [INFO] [stderr] Compiling anyhow v1.0.93 [INFO] [stderr] Compiling base64 v0.22.1 [INFO] [stderr] Compiling rustls-pemfile v2.2.0 [INFO] [stderr] Compiling rustls-native-certs v0.7.3 [INFO] [stderr] Compiling same-file v1.0.6 [INFO] [stderr] Compiling walkdir v2.5.0 [INFO] [stderr] Compiling flate2 v1.0.35 [INFO] [stderr] Checking lapack-sys v0.12.1 [INFO] [stderr] Checking rawpointer v0.2.1 [INFO] [stderr] Compiling ndarray v0.14.0 [INFO] [stderr] Checking matrixmultiply v0.2.4 [INFO] [stderr] Checking approx v0.4.0 [INFO] [stderr] Checking num-integer v0.1.46 [INFO] [stderr] Checking cblas-sys v0.1.4 [INFO] [stderr] Checking blas-src v0.6.1 [INFO] [stderr] Checking factorial v0.2.1 [INFO] [stderr] Compiling filetime v0.2.25 [INFO] [stderr] Compiling dirs-sys v0.3.7 [INFO] [stderr] Compiling dirs v3.0.2 [INFO] [stderr] Compiling xattr v1.3.1 [INFO] [stderr] Compiling tar v0.4.43 [INFO] [stderr] Compiling synstructure v0.13.1 [INFO] [stderr] Compiling zerofrom-derive v0.1.5 [INFO] [stderr] Compiling yoke-derive v0.7.5 [INFO] [stderr] Compiling zerovec-derive v0.10.3 [INFO] [stderr] Compiling displaydoc v0.2.5 [INFO] [stderr] Compiling icu_provider_macros v1.5.0 [INFO] [stderr] Compiling zerocopy-derive v0.7.35 [INFO] [stderr] Compiling openssl-macros v0.1.1 [INFO] [stderr] Compiling thiserror-impl v1.0.69 [INFO] [stderr] Checking zerocopy v0.7.35 [INFO] [stderr] Compiling zerofrom v0.1.5 [INFO] [stderr] Compiling thiserror v1.0.69 [INFO] [stderr] Compiling yoke v0.7.5 [INFO] [stderr] Compiling zerovec v0.10.4 [INFO] [stderr] Checking ppv-lite86 v0.2.20 [INFO] [stderr] Checking rand_chacha v0.2.2 [INFO] [stderr] Checking rand v0.7.3 [INFO] [stderr] Compiling tinystr v0.7.6 [INFO] [stderr] Compiling icu_collections v1.5.0 [INFO] [stderr] Compiling icu_locid v1.5.0 [INFO] [stderr] Checking num-complex v0.3.1 [INFO] [stderr] Checking lapack v0.17.0 [INFO] [stderr] Checking cauchy v0.3.0 [INFO] [stderr] Compiling icu_provider v1.5.0 [INFO] [stderr] Compiling icu_locid_transform v1.5.0 [INFO] [stderr] Compiling icu_properties v1.5.1 [INFO] [stderr] Compiling icu_normalizer v1.5.0 [INFO] [stderr] Compiling idna_adapter v1.2.0 [INFO] [stderr] Compiling idna v1.0.3 [INFO] [stderr] Compiling url v2.5.4 [INFO] [stderr] Compiling ureq v2.10.1 [INFO] [stderr] Compiling openblas-build v0.10.9 [INFO] [stderr] Compiling openblas-src v0.10.9 [INFO] [stderr] error: failed to run custom build command for `openblas-src v0.10.9` [INFO] [stderr] note: To improve backtraces for build dependencies, set the CARGO_PROFILE_DEV_BUILD_OVERRIDE_DEBUG=true environment variable to enable debug information generation. [INFO] [stderr] [INFO] [stderr] Caused by: [INFO] [stderr] process didn't exit successfully: `/opt/rustwide/target/debug/build/openblas-src-0059609eb30163ad/build-script-build` (exit status: 101) [INFO] [stderr] --- stdout [INFO] [stderr] cargo:rerun-if-env-changed=OPENBLAS_TARGET [INFO] [stderr] cargo:rerun-if-env-changed=OPENBLAS_CC [INFO] [stderr] cargo:rerun-if-env-changed=OPENBLAS_HOSTCC [INFO] [stderr] cargo:rerun-if-env-changed=OPENBLAS_FC [INFO] [stderr] cargo:rerun-if-env-changed=OPENBLAS_RANLIB [INFO] [stderr] [INFO] [stderr] --- stderr [INFO] [stderr] thread 'main' panicked at /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/openblas-src-0.10.9/build.rs:181:52: [INFO] [stderr] called `Result::unwrap()` on an `Err` value: https://github.com/xianyi/OpenBLAS/releases/download/v0.3.25/OpenBLAS-0.3.25.tar.gz: Dns Failed: resolve dns name 'github.com:443': failed to lookup address information: Temporary failure in name resolution [INFO] [stderr] [INFO] [stderr] Caused by: [INFO] [stderr] failed to lookup address information: Temporary failure in name resolution [INFO] [stderr] [INFO] [stderr] Stack backtrace: [INFO] [stderr] 0: anyhow::error:: for anyhow::Error>::from [INFO] [stderr] 1: as core::ops::try_trait::FromResidual>>::from_residual [INFO] [stderr] 2: openblas_build::download::download [INFO] [stderr] 3: build_script_build::build [INFO] [stderr] 4: build_script_build::main [INFO] [stderr] 5: core::ops::function::FnOnce::call_once [INFO] [stderr] 6: std::sys::backtrace::__rust_begin_short_backtrace [INFO] [stderr] 7: std::rt::lang_start::{{closure}} [INFO] [stderr] 8: core::ops::function::impls:: for &F>::call_once [INFO] [stderr] at /rustc/ff1737bb00913444173658b4e0b274fd79aabf66/library/core/src/ops/function.rs:284:13 [INFO] [stderr] 9: std::panicking::try::do_call [INFO] [stderr] at /rustc/ff1737bb00913444173658b4e0b274fd79aabf66/library/std/src/panicking.rs:557:40 [INFO] [stderr] 10: std::panicking::try [INFO] [stderr] at /rustc/ff1737bb00913444173658b4e0b274fd79aabf66/library/std/src/panicking.rs:520:19 [INFO] [stderr] 11: std::panic::catch_unwind [INFO] [stderr] at /rustc/ff1737bb00913444173658b4e0b274fd79aabf66/library/std/src/panic.rs:358:14 [INFO] [stderr] 12: std::rt::lang_start_internal::{{closure}} [INFO] [stderr] at /rustc/ff1737bb00913444173658b4e0b274fd79aabf66/library/std/src/rt.rs:174:48 [INFO] [stderr] 13: std::panicking::try::do_call [INFO] [stderr] at /rustc/ff1737bb00913444173658b4e0b274fd79aabf66/library/std/src/panicking.rs:557:40 [INFO] [stderr] 14: std::panicking::try [INFO] [stderr] at /rustc/ff1737bb00913444173658b4e0b274fd79aabf66/library/std/src/panicking.rs:520:19 [INFO] [stderr] 15: std::panic::catch_unwind [INFO] [stderr] at /rustc/ff1737bb00913444173658b4e0b274fd79aabf66/library/std/src/panic.rs:358:14 [INFO] [stderr] 16: std::rt::lang_start_internal [INFO] [stderr] at /rustc/ff1737bb00913444173658b4e0b274fd79aabf66/library/std/src/rt.rs:174:20 [INFO] [stderr] 17: std::rt::lang_start [INFO] [stderr] 18: main [INFO] [stderr] 19: [INFO] [stderr] 20: __libc_start_main [INFO] [stderr] 21: _start [INFO] [stderr] stack backtrace: [INFO] [stderr] 0: 0x5f9119f776aa - std::backtrace_rs::backtrace::libunwind::trace::h4a182ed5026c4960 [INFO] [stderr] at /rustc/ff1737bb00913444173658b4e0b274fd79aabf66/library/std/src/../../backtrace/src/backtrace/libunwind.rs:116:5 [INFO] [stderr] 1: 0x5f9119f776aa - std::backtrace_rs::backtrace::trace_unsynchronized::hd36eaf0d0af663ac [INFO] [stderr] at /rustc/ff1737bb00913444173658b4e0b274fd79aabf66/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5 [INFO] [stderr] 2: 0x5f9119f776aa - std::sys::backtrace::_print_fmt::h5bc686de8bf76aa3 [INFO] [stderr] at /rustc/ff1737bb00913444173658b4e0b274fd79aabf66/library/std/src/sys/backtrace.rs:66:9 [INFO] [stderr] 3: 0x5f9119f776aa - ::fmt::hd8bd9250b5d34cf2 [INFO] [stderr] at /rustc/ff1737bb00913444173658b4e0b274fd79aabf66/library/std/src/sys/backtrace.rs:39:26 [INFO] [stderr] 4: 0x5f9119f9eb23 - core::fmt::rt::Argument::fmt::h479db8f948910918 [INFO] [stderr] at /rustc/ff1737bb00913444173658b4e0b274fd79aabf66/library/core/src/fmt/rt.rs:177:76 [INFO] [stderr] 5: 0x5f9119f9eb23 - core::fmt::write::h8ea7001525e04e92 [INFO] [stderr] at /rustc/ff1737bb00913444173658b4e0b274fd79aabf66/library/core/src/fmt/mod.rs:1189:21 [INFO] [stderr] 6: 0x5f9119f72cc3 - std::io::Write::write_fmt::h9a3a3a90a20c720b [INFO] [stderr] at /rustc/ff1737bb00913444173658b4e0b274fd79aabf66/library/std/src/io/mod.rs:1884:15 [INFO] [stderr] 7: 0x5f9119f774f2 - std::sys::backtrace::BacktraceLock::print::h524f4afae71bff25 [INFO] [stderr] at /rustc/ff1737bb00913444173658b4e0b274fd79aabf66/library/std/src/sys/backtrace.rs:42:9 [INFO] [stderr] 8: 0x5f9119f78abc - std::panicking::default_hook::{{closure}}::hbf0efdb45c0ec2fa [INFO] [stderr] at /rustc/ff1737bb00913444173658b4e0b274fd79aabf66/library/std/src/panicking.rs:268:22 [INFO] [stderr] 9: 0x5f9119f78902 - std::panicking::default_hook::hd8655fd75a36fb4e [INFO] [stderr] at /rustc/ff1737bb00913444173658b4e0b274fd79aabf66/library/std/src/panicking.rs:295:9 [INFO] [stderr] 10: 0x5f9119f790f7 - std::panicking::rust_panic_with_hook::hfd3e39fd18e5a522 [INFO] [stderr] at /rustc/ff1737bb00913444173658b4e0b274fd79aabf66/library/std/src/panicking.rs:801:13 [INFO] [stderr] 11: 0x5f9119f78f8a - std::panicking::begin_panic_handler::{{closure}}::h541106c2fc98c78e [INFO] [stderr] at /rustc/ff1737bb00913444173658b4e0b274fd79aabf66/library/std/src/panicking.rs:674:13 [INFO] [stderr] 12: 0x5f9119f77b89 - std::sys::backtrace::__rust_end_short_backtrace::hd41b812be983a407 [INFO] [stderr] at /rustc/ff1737bb00913444173658b4e0b274fd79aabf66/library/std/src/sys/backtrace.rs:170:18 [INFO] [stderr] 13: 0x5f9119f78c1c - rust_begin_unwind [INFO] [stderr] at /rustc/ff1737bb00913444173658b4e0b274fd79aabf66/library/std/src/panicking.rs:665:5 [INFO] [stderr] 14: 0x5f9119f9d7e0 - core::panicking::panic_fmt::h6d97ef49812eecdc [INFO] [stderr] at /rustc/ff1737bb00913444173658b4e0b274fd79aabf66/library/core/src/panicking.rs:76:14 [INFO] [stderr] 15: 0x5f9119f9dbf6 - core::result::unwrap_failed::h15f0d843aaf4c779 [INFO] [stderr] at /rustc/ff1737bb00913444173658b4e0b274fd79aabf66/library/core/src/result.rs:1699:5 [INFO] [stderr] 16: 0x5f9119e1499c - build_script_build::build::h5596679ece25d5c3 [INFO] [stderr] 17: 0x5f9119e13fe2 - build_script_build::main::hebb11c5e0aa5a89a [INFO] [stderr] 18: 0x5f9119e16353 - core::ops::function::FnOnce::call_once::h06a4e9f018bb53ad [INFO] [stderr] 19: 0x5f9119e15ce6 - std::sys::backtrace::__rust_begin_short_backtrace::hf1a6e6770fb43093 [INFO] [stderr] 20: 0x5f9119e15c89 - std::rt::lang_start::{{closure}}::h3205b16a0764497e [INFO] [stderr] 21: 0x5f9119f6da17 - core::ops::function::impls:: for &F>::call_once::h85d3b6433c6201ad [INFO] [stderr] at /rustc/ff1737bb00913444173658b4e0b274fd79aabf66/library/core/src/ops/function.rs:284:13 [INFO] [stderr] 22: 0x5f9119f6da17 - std::panicking::try::do_call::h1e58a303c26811b2 [INFO] [stderr] at /rustc/ff1737bb00913444173658b4e0b274fd79aabf66/library/std/src/panicking.rs:557:40 [INFO] [stderr] 23: 0x5f9119f6da17 - std::panicking::try::hf884ee642c4250a3 [INFO] [stderr] at /rustc/ff1737bb00913444173658b4e0b274fd79aabf66/library/std/src/panicking.rs:520:19 [INFO] [stderr] 24: 0x5f9119f6da17 - std::panic::catch_unwind::h16d69298af9a3692 [INFO] [stderr] at /rustc/ff1737bb00913444173658b4e0b274fd79aabf66/library/std/src/panic.rs:358:14 [INFO] [stderr] 25: 0x5f9119f6da17 - std::rt::lang_start_internal::{{closure}}::h5a8a6f94cdf753a6 [INFO] [stderr] at /rustc/ff1737bb00913444173658b4e0b274fd79aabf66/library/std/src/rt.rs:174:48 [INFO] [stderr] 26: 0x5f9119f6da17 - std::panicking::try::do_call::hf6ee2fe994f58e18 [INFO] [stderr] at /rustc/ff1737bb00913444173658b4e0b274fd79aabf66/library/std/src/panicking.rs:557:40 [INFO] [stderr] 27: 0x5f9119f6da17 - std::panicking::try::hc1282bf2eeca2940 [INFO] [stderr] at /rustc/ff1737bb00913444173658b4e0b274fd79aabf66/library/std/src/panicking.rs:520:19 [INFO] [stderr] 28: 0x5f9119f6da17 - std::panic::catch_unwind::h212572842a792e2c [INFO] [stderr] at /rustc/ff1737bb00913444173658b4e0b274fd79aabf66/library/std/src/panic.rs:358:14 [INFO] [stderr] 29: 0x5f9119f6da17 - std::rt::lang_start_internal::h9681d29d05b11740 [INFO] [stderr] at /rustc/ff1737bb00913444173658b4e0b274fd79aabf66/library/std/src/rt.rs:174:20 [INFO] [stderr] 30: 0x5f9119e15c67 - std::rt::lang_start::h68888b83e44b5e59 [INFO] [stderr] 31: 0x5f9119e15185 - main [INFO] [stderr] 32: 0x77244cca3d90 - [INFO] [stderr] 33: 0x77244cca3e40 - __libc_start_main [INFO] [stderr] 34: 0x5f9119e0d4e5 - _start [INFO] [stderr] 35: 0x0 - [INFO] running `Command { std: "docker" "inspect" "73a18f79b62cbd90b5f9158dfc3fd77aa6ff952fe4c68c2d291b07e4d9ae9ec3", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "73a18f79b62cbd90b5f9158dfc3fd77aa6ff952fe4c68c2d291b07e4d9ae9ec3", kill_on_drop: false }` [INFO] [stdout] 73a18f79b62cbd90b5f9158dfc3fd77aa6ff952fe4c68c2d291b07e4d9ae9ec3