[INFO] cloning repository https://github.com/v66moroz/xcsv [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/v66moroz/xcsv" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fv66moroz%2Fxcsv", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fv66moroz%2Fxcsv'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 948a01ad47528969c7dad94926ad85d7deece40b [INFO] testing v66moroz/xcsv against master#5d5ff84130da0d74c6ece368dbe821d8f83fa526 for pr-79296 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fv66moroz%2Fxcsv" "/workspace/builds/worker-14/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/v66moroz/xcsv on toolchain 5d5ff84130da0d74c6ece368dbe821d8f83fa526 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/v66moroz/xcsv [INFO] finished tweaking git repo https://github.com/v66moroz/xcsv [INFO] tweaked toml for git repo https://github.com/v66moroz/xcsv written to /workspace/builds/worker-14/source/Cargo.toml [INFO] crate git repo https://github.com/v66moroz/xcsv already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] a3f3ccf65c1975e826cd9a6cab5772d049fd0b3b529a26e7755ac067ac2fb9b5 [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "a3f3ccf65c1975e826cd9a6cab5772d049fd0b3b529a26e7755ac067ac2fb9b5", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "a3f3ccf65c1975e826cd9a6cab5772d049fd0b3b529a26e7755ac067ac2fb9b5", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "a3f3ccf65c1975e826cd9a6cab5772d049fd0b3b529a26e7755ac067ac2fb9b5", kill_on_drop: false }` [INFO] [stdout] a3f3ccf65c1975e826cd9a6cab5772d049fd0b3b529a26e7755ac067ac2fb9b5 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] [stdout] 39fc0d1a8ec1dfc373aafccd040ab834cea6e2c12561d11d3f7c068052e43a27 [INFO] running `Command { std: "docker" "start" "-a" "39fc0d1a8ec1dfc373aafccd040ab834cea6e2c12561d11d3f7c068052e43a27", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.43 [INFO] [stderr] Compiling cfg-if v0.1.6 [INFO] [stderr] Compiling serde v1.0.80 [INFO] [stderr] Compiling libcruby-sys v0.7.5 [INFO] [stderr] Compiling lazy_static v1.2.0 [INFO] [stderr] Compiling regex v1.0.6 [INFO] [stderr] Compiling ucd-util v0.1.3 [INFO] [stderr] Compiling cstr-macro v0.1.0 [INFO] [stderr] Compiling utf8-ranges v1.0.2 [INFO] [stderr] Compiling memchr v2.1.1 [INFO] [stderr] Compiling miniz-sys v0.1.11 [INFO] [stderr] Compiling thread_local v0.3.6 [INFO] [stderr] Compiling regex-syntax v0.6.3 [INFO] [stderr] Compiling flate2 v1.0.4 [INFO] [stderr] Compiling helix v0.7.5 [INFO] [stderr] Compiling aho-corasick v0.6.9 [INFO] [stderr] Compiling csv-core v0.1.4 [INFO] [stderr] Compiling csv v1.0.2 [INFO] [stderr] Compiling xcsv v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/lib.rs:15:20 [INFO] [stdout] | [INFO] [stdout] 15 | type CSVIterType = Iterator>; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator>` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(bare_trait_objects)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/lib.rs:69:32 [INFO] [stdout] | [INFO] [stdout] 69 | let gz_reader: Box = [INFO] [stdout] | ^^^^ help: use `dyn`: `dyn Read` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead [INFO] [stdout] --> src/lib.rs:47:1 [INFO] [stdout] | [INFO] [stdout] 47 | / ruby! { [INFO] [stdout] 48 | | class XCSV { [INFO] [stdout] 49 | | struct { [INFO] [stdout] 50 | | path: String, [INFO] [stdout] ... | [INFO] [stdout] 104 | | } [INFO] [stdout] 105 | | } [INFO] [stdout] | |_^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(deprecated)]` on by default [INFO] [stdout] = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead [INFO] [stdout] --> src/lib.rs:47:1 [INFO] [stdout] | [INFO] [stdout] 47 | / ruby! { [INFO] [stdout] 48 | | class XCSV { [INFO] [stdout] 49 | | struct { [INFO] [stdout] 50 | | path: String, [INFO] [stdout] ... | [INFO] [stdout] 104 | | } [INFO] [stdout] 105 | | } [INFO] [stdout] | |_^ [INFO] [stdout] | [INFO] [stdout] = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead [INFO] [stdout] --> src/lib.rs:47:1 [INFO] [stdout] | [INFO] [stdout] 47 | / ruby! { [INFO] [stdout] 48 | | class XCSV { [INFO] [stdout] 49 | | struct { [INFO] [stdout] 50 | | path: String, [INFO] [stdout] ... | [INFO] [stdout] 104 | | } [INFO] [stdout] 105 | | } [INFO] [stdout] | |_^ [INFO] [stdout] | [INFO] [stdout] = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead [INFO] [stdout] --> src/lib.rs:47:1 [INFO] [stdout] | [INFO] [stdout] 47 | / ruby! { [INFO] [stdout] 48 | | class XCSV { [INFO] [stdout] 49 | | struct { [INFO] [stdout] 50 | | path: String, [INFO] [stdout] ... | [INFO] [stdout] 104 | | } [INFO] [stdout] 105 | | } [INFO] [stdout] | |_^ [INFO] [stdout] | [INFO] [stdout] = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 31.17s [INFO] [stdout] warning: 6 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] running `Command { std: "docker" "inspect" "39fc0d1a8ec1dfc373aafccd040ab834cea6e2c12561d11d3f7c068052e43a27", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "39fc0d1a8ec1dfc373aafccd040ab834cea6e2c12561d11d3f7c068052e43a27", kill_on_drop: false }` [INFO] [stdout] 39fc0d1a8ec1dfc373aafccd040ab834cea6e2c12561d11d3f7c068052e43a27 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 288d2859ec219d60180689f60c99812e83c4f1079c5e3850913e28781062a854 [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "288d2859ec219d60180689f60c99812e83c4f1079c5e3850913e28781062a854", kill_on_drop: false }` [INFO] [stderr] Compiling xcsv v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/lib.rs:15:20 [INFO] [stdout] | [INFO] [stdout] 15 | type CSVIterType = Iterator>; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator>` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(bare_trait_objects)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/lib.rs:69:32 [INFO] [stdout] | [INFO] [stdout] 69 | let gz_reader: Box = [INFO] [stdout] | ^^^^ help: use `dyn`: `dyn Read` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead [INFO] [stdout] --> src/lib.rs:47:1 [INFO] [stdout] | [INFO] [stdout] 47 | / ruby! { [INFO] [stdout] 48 | | class XCSV { [INFO] [stdout] 49 | | struct { [INFO] [stdout] 50 | | path: String, [INFO] [stdout] ... | [INFO] [stdout] 104 | | } [INFO] [stdout] 105 | | } [INFO] [stdout] | |_^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(deprecated)]` on by default [INFO] [stdout] = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead [INFO] [stdout] --> src/lib.rs:47:1 [INFO] [stdout] | [INFO] [stdout] 47 | / ruby! { [INFO] [stdout] 48 | | class XCSV { [INFO] [stdout] 49 | | struct { [INFO] [stdout] 50 | | path: String, [INFO] [stdout] ... | [INFO] [stdout] 104 | | } [INFO] [stdout] 105 | | } [INFO] [stdout] | |_^ [INFO] [stdout] | [INFO] [stdout] = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead [INFO] [stdout] --> src/lib.rs:47:1 [INFO] [stdout] | [INFO] [stdout] 47 | / ruby! { [INFO] [stdout] 48 | | class XCSV { [INFO] [stdout] 49 | | struct { [INFO] [stdout] 50 | | path: String, [INFO] [stdout] ... | [INFO] [stdout] 104 | | } [INFO] [stdout] 105 | | } [INFO] [stdout] | |_^ [INFO] [stdout] | [INFO] [stdout] = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead [INFO] [stdout] --> src/lib.rs:47:1 [INFO] [stdout] | [INFO] [stdout] 47 | / ruby! { [INFO] [stdout] 48 | | class XCSV { [INFO] [stdout] 49 | | struct { [INFO] [stdout] 50 | | path: String, [INFO] [stdout] ... | [INFO] [stdout] 104 | | } [INFO] [stdout] 105 | | } [INFO] [stdout] | |_^ [INFO] [stdout] | [INFO] [stdout] = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 6 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 2.48s [INFO] running `Command { std: "docker" "inspect" "288d2859ec219d60180689f60c99812e83c4f1079c5e3850913e28781062a854", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "288d2859ec219d60180689f60c99812e83c4f1079c5e3850913e28781062a854", kill_on_drop: false }` [INFO] [stdout] 288d2859ec219d60180689f60c99812e83c4f1079c5e3850913e28781062a854 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "test" "--frozen", kill_on_drop: false }` [INFO] [stdout] d9a4646074cfd759eefb3cc782c1be9ce40ab32f6a73b2dbb369e150412605ec [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "d9a4646074cfd759eefb3cc782c1be9ce40ab32f6a73b2dbb369e150412605ec", kill_on_drop: false }` [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/lib.rs:15:20 [INFO] [stderr] | [INFO] [stderr] 15 | type CSVIterType = Iterator>; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator>` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(bare_trait_objects)]` on by default [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/lib.rs:69:32 [INFO] [stderr] | [INFO] [stderr] 69 | let gz_reader: Box = [INFO] [stderr] | ^^^^ help: use `dyn`: `dyn Read` [INFO] [stderr] [INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead [INFO] [stderr] --> src/lib.rs:47:1 [INFO] [stderr] | [INFO] [stderr] 47 | / ruby! { [INFO] [stderr] 48 | | class XCSV { [INFO] [stderr] 49 | | struct { [INFO] [stderr] 50 | | path: String, [INFO] [stderr] ... | [INFO] [stderr] 104 | | } [INFO] [stderr] 105 | | } [INFO] [stderr] | |_^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(deprecated)]` on by default [INFO] [stderr] = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stderr] [INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead [INFO] [stderr] --> src/lib.rs:47:1 [INFO] [stderr] | [INFO] [stderr] 47 | / ruby! { [INFO] [stderr] 48 | | class XCSV { [INFO] [stderr] 49 | | struct { [INFO] [stderr] 50 | | path: String, [INFO] [stderr] ... | [INFO] [stderr] 104 | | } [INFO] [stderr] 105 | | } [INFO] [stderr] | |_^ [INFO] [stderr] | [INFO] [stderr] = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stderr] [INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead [INFO] [stderr] --> src/lib.rs:47:1 [INFO] [stderr] | [INFO] [stderr] 47 | / ruby! { [INFO] [stderr] 48 | | class XCSV { [INFO] [stderr] 49 | | struct { [INFO] [stderr] 50 | | path: String, [INFO] [stderr] ... | [INFO] [stderr] 104 | | } [INFO] [stderr] 105 | | } [INFO] [stderr] | |_^ [INFO] [stderr] | [INFO] [stderr] = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stderr] [INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead [INFO] [stderr] --> src/lib.rs:47:1 [INFO] [stderr] | [INFO] [stderr] 47 | / ruby! { [INFO] [stderr] 48 | | class XCSV { [INFO] [stderr] 49 | | struct { [INFO] [stderr] 50 | | path: String, [INFO] [stderr] ... | [INFO] [stderr] 104 | | } [INFO] [stderr] 105 | | } [INFO] [stderr] | |_^ [INFO] [stderr] | [INFO] [stderr] = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stderr] [INFO] [stderr] warning: 6 warnings emitted [INFO] [stderr] [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 0.10s [INFO] [stderr] Running /opt/rustwide/target/debug/deps/xcsv-83b7a48060bdf9a5 [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 [INFO] [stdout] [INFO] running `Command { std: "docker" "inspect" "d9a4646074cfd759eefb3cc782c1be9ce40ab32f6a73b2dbb369e150412605ec", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "d9a4646074cfd759eefb3cc782c1be9ce40ab32f6a73b2dbb369e150412605ec", kill_on_drop: false }` [INFO] [stdout] d9a4646074cfd759eefb3cc782c1be9ce40ab32f6a73b2dbb369e150412605ec