[INFO] cloning repository https://github.com/ash-z01/SqliteDIY-Rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ash-z01/SqliteDIY-Rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fash-z01%2FSqliteDIY-Rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fash-z01%2FSqliteDIY-Rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a5b1eef706cfcdcee5bc58a4d551f2db5f3965af
[INFO] testing ash-z01/SqliteDIY-Rust against try#722e1797249a965b6335aebd65d777f917e498f1 for pr-91031
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fash-z01%2FSqliteDIY-Rust" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ash-z01/SqliteDIY-Rust on toolchain 722e1797249a965b6335aebd65d777f917e498f1
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ash-z01/SqliteDIY-Rust
[INFO] finished tweaking git repo https://github.com/ash-z01/SqliteDIY-Rust
[INFO] tweaked toml for git repo https://github.com/ash-z01/SqliteDIY-Rust written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/ash-z01/SqliteDIY-Rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "metadata" "--no-deps" "--format-version=1", 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] b637b01825bef91c5756d5e90c32f461ebfa27261d163785c350d1427f314926
[INFO] running `Command { std: "docker" "start" "-a" "b637b01825bef91c5756d5e90c32f461ebfa27261d163785c350d1427f314926", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b637b01825bef91c5756d5e90c32f461ebfa27261d163785c350d1427f314926", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b637b01825bef91c5756d5e90c32f461ebfa27261d163785c350d1427f314926", kill_on_drop: false }`
[INFO] [stdout] b637b01825bef91c5756d5e90c32f461ebfa27261d163785c350d1427f314926
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "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] 7d2bf8fec0097ac63baa28f64a280a467f0fb508a2b42645e974f6828330e648
[INFO] running `Command { std: "docker" "start" "-a" "7d2bf8fec0097ac63baa28f64a280a467f0fb508a2b42645e974f6828330e648", kill_on_drop: false }`
[INFO] [stderr]    Compiling sqlite_diy_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `byte_offsets`
[INFO] [stdout]    --> src/table.rs:204:63
[INFO] [stdout]     |
[INFO] [stdout] 204 |     pub fn serialize_row(&mut self, row: &Row, page_num: u32, byte_offsets: u32) {
[INFO] [stdout]     |                                                               ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_byte_offsets`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Cursor`
[INFO] [stdout]  --> src/cursor.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub struct Cursor<'a> {
[INFO] [stdout]   |            ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `table_start`
[INFO] [stdout]  --> src/cursor.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 |     pub fn table_start(table: &mut Table) -> Cursor {
[INFO] [stdout]   |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `table_end`
[INFO] [stdout]   --> src/cursor.rs:18:12
[INFO] [stdout]    |
[INFO] [stdout] 18 |     pub fn table_end(table: &mut Table) -> Cursor {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `cursor_advance`
[INFO] [stdout]   --> src/cursor.rs:27:12
[INFO] [stdout]    |
[INFO] [stdout] 27 |     pub fn cursor_advance(&mut self) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/table.rs:46:8
[INFO] [stdout]    |
[INFO] [stdout] 46 |     fn new() -> Pager {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]    --> src/table.rs:157:12
[INFO] [stdout]     |
[INFO] [stdout] 157 |     pub fn new() -> Table {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `cursor_value`
[INFO] [stdout]    --> src/table.rs:195:12
[INFO] [stdout]     |
[INFO] [stdout] 195 |     pub fn cursor_value(&mut self, cursor: &Cursor) -> (u32, u32) {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/repl.rs:193:9
[INFO] [stdout]     |
[INFO] [stdout] 193 |         &table.deserialize_row(page_num, byte_offsets).show();
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 193 |         let _ = &table.deserialize_row(page_num, byte_offsets).show();
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.32s
[INFO] running `Command { std: "docker" "inspect" "7d2bf8fec0097ac63baa28f64a280a467f0fb508a2b42645e974f6828330e648", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7d2bf8fec0097ac63baa28f64a280a467f0fb508a2b42645e974f6828330e648", kill_on_drop: false }`
[INFO] [stdout] 7d2bf8fec0097ac63baa28f64a280a467f0fb508a2b42645e974f6828330e648
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "test" "--frozen" "--no-run" "--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] 494c86929665fce4cc3e1e7fe19e52bd818e52a71656438ba95614a2395b929a
[INFO] running `Command { std: "docker" "start" "-a" "494c86929665fce4cc3e1e7fe19e52bd818e52a71656438ba95614a2395b929a", kill_on_drop: false }`
[INFO] [stderr]    Compiling sqlite_diy_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `byte_offsets`
[INFO] [stdout]    --> src/table.rs:204:63
[INFO] [stdout]     |
[INFO] [stdout] 204 |     pub fn serialize_row(&mut self, row: &Row, page_num: u32, byte_offsets: u32) {
[INFO] [stdout]     |                                                               ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_byte_offsets`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Cursor`
[INFO] [stdout]  --> src/cursor.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub struct Cursor<'a> {
[INFO] [stdout]   |            ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `table_start`
[INFO] [stdout]  --> src/cursor.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 |     pub fn table_start(table: &mut Table) -> Cursor {
[INFO] [stdout]   |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `table_end`
[INFO] [stdout]   --> src/cursor.rs:18:12
[INFO] [stdout]    |
[INFO] [stdout] 18 |     pub fn table_end(table: &mut Table) -> Cursor {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `cursor_advance`
[INFO] [stdout]   --> src/cursor.rs:27:12
[INFO] [stdout]    |
[INFO] [stdout] 27 |     pub fn cursor_advance(&mut self) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/table.rs:46:8
[INFO] [stdout]    |
[INFO] [stdout] 46 |     fn new() -> Pager {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]    --> src/table.rs:157:12
[INFO] [stdout]     |
[INFO] [stdout] 157 |     pub fn new() -> Table {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `cursor_value`
[INFO] [stdout]    --> src/table.rs:195:12
[INFO] [stdout]     |
[INFO] [stdout] 195 |     pub fn cursor_value(&mut self, cursor: &Cursor) -> (u32, u32) {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/repl.rs:193:9
[INFO] [stdout]     |
[INFO] [stdout] 193 |         &table.deserialize_row(page_num, byte_offsets).show();
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 193 |         let _ = &table.deserialize_row(page_num, byte_offsets).show();
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.77s
[INFO] running `Command { std: "docker" "inspect" "494c86929665fce4cc3e1e7fe19e52bd818e52a71656438ba95614a2395b929a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "494c86929665fce4cc3e1e7fe19e52bd818e52a71656438ba95614a2395b929a", kill_on_drop: false }`
[INFO] [stdout] 494c86929665fce4cc3e1e7fe19e52bd818e52a71656438ba95614a2395b929a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 9c8c7e0411a7d07ee674bdc445533273defc6ced822682c1afce37b2df6a5d0e
[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" "9c8c7e0411a7d07ee674bdc445533273defc6ced822682c1afce37b2df6a5d0e", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `byte_offsets`
[INFO] [stderr]    --> src/table.rs:204:63
[INFO] [stderr]     |
[INFO] [stderr] 204 |     pub fn serialize_row(&mut self, row: &Row, page_num: u32, byte_offsets: u32) {
[INFO] [stderr]     |                                                               ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_byte_offsets`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Cursor`
[INFO] [stderr]  --> src/cursor.rs:2:12
[INFO] [stderr]   |
[INFO] [stderr] 2 | pub struct Cursor<'a> {
[INFO] [stderr]   |            ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `table_start`
[INFO] [stderr]  --> src/cursor.rs:9:12
[INFO] [stderr]   |
[INFO] [stderr] 9 |     pub fn table_start(table: &mut Table) -> Cursor {
[INFO] [stderr]   |            ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `table_end`
[INFO] [stderr]   --> src/cursor.rs:18:12
[INFO] [stderr]    |
[INFO] [stderr] 18 |     pub fn table_end(table: &mut Table) -> Cursor {
[INFO] [stderr]    |            ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `cursor_advance`
[INFO] [stderr]   --> src/cursor.rs:27:12
[INFO] [stderr]    |
[INFO] [stderr] 27 |     pub fn cursor_advance(&mut self) {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/table.rs:46:8
[INFO] [stderr]    |
[INFO] [stderr] 46 |     fn new() -> Pager {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]    --> src/table.rs:157:12
[INFO] [stderr]     |
[INFO] [stderr] 157 |     pub fn new() -> Table {
[INFO] [stderr]     |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `cursor_value`
[INFO] [stderr]    --> src/table.rs:195:12
[INFO] [stderr]     |
[INFO] [stderr] 195 |     pub fn cursor_value(&mut self, cursor: &Cursor) -> (u32, u32) {
[INFO] [stderr]     |            ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused borrow that must be used
[INFO] [stderr]    --> src/repl.rs:193:9
[INFO] [stderr]     |
[INFO] [stderr] 193 |         &table.deserialize_row(page_num, byte_offsets).show();
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 193 |         let _ = &table.deserialize_row(page_num, byte_offsets).show();
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `sqlite_diy_rust` (bin "sqlite_diy_rust" test) generated 9 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/sqlite_diy_rust-3097b21f9373efb1)
[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" "9c8c7e0411a7d07ee674bdc445533273defc6ced822682c1afce37b2df6a5d0e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9c8c7e0411a7d07ee674bdc445533273defc6ced822682c1afce37b2df6a5d0e", kill_on_drop: false }`
[INFO] [stdout] 9c8c7e0411a7d07ee674bdc445533273defc6ced822682c1afce37b2df6a5d0e