[INFO] cloning repository https://github.com/jozark/rust-intro [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jozark/rust-intro" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjozark%2Frust-intro", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjozark%2Frust-intro'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] d7365ba6e87a7ed15044fb23f42ff1de089a14e3 [INFO] checking jozark/rust-intro against master#bb89df6903539e7014b8db29bccd6a9ee9553122 for pr-121072 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjozark%2Frust-intro" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/jozark/rust-intro on toolchain bb89df6903539e7014b8db29bccd6a9ee9553122 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+bb89df6903539e7014b8db29bccd6a9ee9553122" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/jozark/rust-intro [INFO] finished tweaking git repo https://github.com/jozark/rust-intro [INFO] tweaked toml for git repo https://github.com/jozark/rust-intro written to /workspace/builds/worker-2-tc1/source/Cargo.toml [INFO] crate git repo https://github.com/jozark/rust-intro 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" "+bb89df6903539e7014b8db29bccd6a9ee9553122" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [ERROR] error running command: no output for 300 seconds [ERROR] this task or one of its parent failed! [ERROR] no output for 300 seconds [ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace. [INFO] checking jozark/rust-intro against try#e2d5da3bc6e298ce5f33ab9bd4e47f6a307ec8d0 for pr-121072 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjozark%2Frust-intro" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/jozark/rust-intro on toolchain e2d5da3bc6e298ce5f33ab9bd4e47f6a307ec8d0 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e2d5da3bc6e298ce5f33ab9bd4e47f6a307ec8d0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/jozark/rust-intro [INFO] finished tweaking git repo https://github.com/jozark/rust-intro [INFO] tweaked toml for git repo https://github.com/jozark/rust-intro written to /workspace/builds/worker-2-tc2/source/Cargo.toml [INFO] crate git repo https://github.com/jozark/rust-intro 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" "+e2d5da3bc6e298ce5f33ab9bd4e47f6a307ec8d0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+e2d5da3bc6e298ce5f33ab9bd4e47f6a307ec8d0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 806b1c8985fab73b85a9ff22a82f8ba3948a74c5943fd0a73c854a9342161a06 [INFO] running `Command { std: "docker" "start" "-a" "806b1c8985fab73b85a9ff22a82f8ba3948a74c5943fd0a73c854a9342161a06", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "806b1c8985fab73b85a9ff22a82f8ba3948a74c5943fd0a73c854a9342161a06", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "806b1c8985fab73b85a9ff22a82f8ba3948a74c5943fd0a73c854a9342161a06", kill_on_drop: false }` [INFO] [stdout] 806b1c8985fab73b85a9ff22a82f8ba3948a74c5943fd0a73c854a9342161a06 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+e2d5da3bc6e298ce5f33ab9bd4e47f6a307ec8d0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] f5c0a937269bf41ecd20ba4446ffeb4b1200a9d2da760e18e703c97b7caee44e [INFO] running `Command { std: "docker" "start" "-a" "f5c0a937269bf41ecd20ba4446ffeb4b1200a9d2da760e18e703c97b7caee44e", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.134 [INFO] [stderr] Checking cfg-if v1.0.0 [INFO] [stderr] Checking ppv-lite86 v0.2.16 [INFO] [stderr] Checking getrandom v0.2.7 [INFO] [stderr] Checking rand_core v0.6.4 [INFO] [stderr] Checking rand_chacha v0.3.1 [INFO] [stderr] Checking rand v0.8.5 [INFO] [stderr] Checking helloworld v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused imports: `Read`, `vec` [INFO] [stdout] --> src/main.rs:5:16 [INFO] [stdout] | [INFO] [stdout] 5 | io::{self, Read}, [INFO] [stdout] | ^^^^ [INFO] [stdout] 6 | vec, [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary parentheses around index expression [INFO] [stdout] --> src/main.rs:69:38 [INFO] [stdout] | [INFO] [stdout] 69 | let right_middle = slice[(lenght / 2)]; [INFO] [stdout] | ^ ^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_parens)]` on by default [INFO] [stdout] help: remove these parentheses [INFO] [stdout] | [INFO] [stdout] 69 - let right_middle = slice[(lenght / 2)]; [INFO] [stdout] 69 + let right_middle = slice[lenght / 2]; [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `Read`, `vec` [INFO] [stdout] --> src/main.rs:5:16 [INFO] [stdout] | [INFO] [stdout] 5 | io::{self, Read}, [INFO] [stdout] | ^^^^ [INFO] [stdout] 6 | vec, [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary parentheses around index expression [INFO] [stdout] --> src/main.rs:69:38 [INFO] [stdout] | [INFO] [stdout] 69 | let right_middle = slice[(lenght / 2)]; [INFO] [stdout] | ^ ^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_parens)]` on by default [INFO] [stdout] help: remove these parentheses [INFO] [stdout] | [INFO] [stdout] 69 - let right_middle = slice[(lenght / 2)]; [INFO] [stdout] 69 + let right_middle = slice[lenght / 2]; [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `x` [INFO] [stdout] --> src/main.rs:228:10 [INFO] [stdout] | [INFO] [stdout] 228 | let (x, y, z) = tup; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_x` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `y` [INFO] [stdout] --> src/main.rs:228:13 [INFO] [stdout] | [INFO] [stdout] 228 | let (x, y, z) = tup; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_y` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `z` [INFO] [stdout] --> src/main.rs:228:16 [INFO] [stdout] | [INFO] [stdout] 228 | let (x, y, z) = tup; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_z` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `arr` [INFO] [stdout] --> src/main.rs:231:9 [INFO] [stdout] | [INFO] [stdout] 231 | let arr = [1, 2, 3]; [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_arr` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Rectangle` is never constructed [INFO] [stdout] --> src/main.rs:12:8 [INFO] [stdout] | [INFO] [stdout] 12 | struct Rectangle { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `Rectangle` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `x` [INFO] [stdout] --> src/main.rs:228:10 [INFO] [stdout] | [INFO] [stdout] 228 | let (x, y, z) = tup; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_x` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `y` [INFO] [stdout] --> src/main.rs:228:13 [INFO] [stdout] | [INFO] [stdout] 228 | let (x, y, z) = tup; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_y` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: methods `calc_area` and `double_width` are never used [INFO] [stdout] --> src/main.rs:18:8 [INFO] [stdout] | [INFO] [stdout] 17 | impl Rectangle { [INFO] [stdout] | -------------- methods in this implementation [INFO] [stdout] 18 | fn calc_area(&self) -> u32 { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 22 | fn double_width(&mut self) { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `first_word_index` is never used [INFO] [stdout] --> src/main.rs:77:4 [INFO] [stdout] | [INFO] [stdout] 77 | fn first_word_index(s: &String) -> &str { [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `boolean_to_string` is never used [INFO] [stdout] --> src/main.rs:90:4 [INFO] [stdout] | [INFO] [stdout] 90 | fn boolean_to_string(b: bool) -> String { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `get_multiples` is never used [INFO] [stdout] --> src/main.rs:98:4 [INFO] [stdout] | [INFO] [stdout] 98 | fn get_multiples(x: u32, n: u32) -> Vec { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `next_light` is never used [INFO] [stdout] --> src/main.rs:108:4 [INFO] [stdout] | [INFO] [stdout] 108 | fn next_light(current: &str) -> String { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `z` [INFO] [stdout] --> src/main.rs:228:16 [INFO] [stdout] | [INFO] [stdout] 228 | let (x, y, z) = tup; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_z` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `arr` [INFO] [stdout] --> src/main.rs:231:9 [INFO] [stdout] | [INFO] [stdout] 231 | let arr = [1, 2, 3]; [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_arr` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `fibonnaci` is never used [INFO] [stdout] --> src/main.rs:119:4 [INFO] [stdout] | [INFO] [stdout] 119 | fn fibonnaci(num: u32) -> u32 { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `control` is never used [INFO] [stdout] --> src/main.rs:147:4 [INFO] [stdout] | [INFO] [stdout] 147 | fn control() { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `guessing_game` is never used [INFO] [stdout] --> src/main.rs:190:4 [INFO] [stdout] | [INFO] [stdout] 190 | fn guessing_game() { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `types` is never used [INFO] [stdout] --> src/main.rs:218:4 [INFO] [stdout] | [INFO] [stdout] 218 | fn types() { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Rectangle` is never constructed [INFO] [stdout] --> src/main.rs:12:8 [INFO] [stdout] | [INFO] [stdout] 12 | struct Rectangle { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `Rectangle` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `seat_at_table` is never used [INFO] [stdout] --> src/garden.rs:7:12 [INFO] [stdout] | [INFO] [stdout] 7 | fn seat_at_table() {} [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: methods `calc_area` and `double_width` are never used [INFO] [stdout] --> src/main.rs:18:8 [INFO] [stdout] | [INFO] [stdout] 17 | impl Rectangle { [INFO] [stdout] | -------------- methods in this implementation [INFO] [stdout] 18 | fn calc_area(&self) -> u32 { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 22 | fn double_width(&mut self) { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `first_word_index` is never used [INFO] [stdout] --> src/main.rs:77:4 [INFO] [stdout] | [INFO] [stdout] 77 | fn first_word_index(s: &String) -> &str { [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `take_order` is never used [INFO] [stdout] --> src/garden.rs:11:12 [INFO] [stdout] | [INFO] [stdout] 11 | fn take_order() {} [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `boolean_to_string` is never used [INFO] [stdout] --> src/main.rs:90:4 [INFO] [stdout] | [INFO] [stdout] 90 | fn boolean_to_string(b: bool) -> String { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `serve_order` is never used [INFO] [stdout] --> src/garden.rs:13:12 [INFO] [stdout] | [INFO] [stdout] 13 | fn serve_order() {} [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `get_multiples` is never used [INFO] [stdout] --> src/main.rs:98:4 [INFO] [stdout] | [INFO] [stdout] 98 | fn get_multiples(x: u32, n: u32) -> Vec { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `next_light` is never used [INFO] [stdout] --> src/main.rs:108:4 [INFO] [stdout] | [INFO] [stdout] 108 | fn next_light(current: &str) -> String { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `fibonnaci` is never used [INFO] [stdout] --> src/main.rs:119:4 [INFO] [stdout] | [INFO] [stdout] 119 | fn fibonnaci(num: u32) -> u32 { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `take_payment` is never used [INFO] [stdout] --> src/garden.rs:15:12 [INFO] [stdout] | [INFO] [stdout] 15 | fn take_payment() {} [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `control` is never used [INFO] [stdout] --> src/main.rs:147:4 [INFO] [stdout] | [INFO] [stdout] 147 | fn control() { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `guessing_game` is never used [INFO] [stdout] --> src/main.rs:190:4 [INFO] [stdout] | [INFO] [stdout] 190 | fn guessing_game() { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `types` is never used [INFO] [stdout] --> src/main.rs:218:4 [INFO] [stdout] | [INFO] [stdout] 218 | fn types() { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `seat_at_table` is never used [INFO] [stdout] --> src/garden.rs:7:12 [INFO] [stdout] | [INFO] [stdout] 7 | fn seat_at_table() {} [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `take_order` is never used [INFO] [stdout] --> src/garden.rs:11:12 [INFO] [stdout] | [INFO] [stdout] 11 | fn take_order() {} [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `serve_order` is never used [INFO] [stdout] --> src/garden.rs:13:12 [INFO] [stdout] | [INFO] [stdout] 13 | fn serve_order() {} [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `take_payment` is never used [INFO] [stdout] --> src/garden.rs:15:12 [INFO] [stdout] | [INFO] [stdout] 15 | fn take_payment() {} [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 20 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 20 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.23s [INFO] running `Command { std: "docker" "inspect" "f5c0a937269bf41ecd20ba4446ffeb4b1200a9d2da760e18e703c97b7caee44e", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "f5c0a937269bf41ecd20ba4446ffeb4b1200a9d2da760e18e703c97b7caee44e", kill_on_drop: false }` [INFO] [stdout] f5c0a937269bf41ecd20ba4446ffeb4b1200a9d2da760e18e703c97b7caee44e