[INFO] cloning repository https://github.com/AndreyElagin/maybe-db
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/AndreyElagin/maybe-db" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAndreyElagin%2Fmaybe-db", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAndreyElagin%2Fmaybe-db'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c990cbbbee1cbad68cd31ceefbe7ecba723c07b2
[INFO] checking AndreyElagin/maybe-db against try#44f3504e96c944ae54fc72b5f5008f53f7eda001 for pr-136776
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAndreyElagin%2Fmaybe-db" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/AndreyElagin/maybe-db on toolchain 44f3504e96c944ae54fc72b5f5008f53f7eda001
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+44f3504e96c944ae54fc72b5f5008f53f7eda001" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/AndreyElagin/maybe-db
[INFO] finished tweaking git repo https://github.com/AndreyElagin/maybe-db
[INFO] tweaked toml for git repo https://github.com/AndreyElagin/maybe-db written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/AndreyElagin/maybe-db 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" "+44f3504e96c944ae54fc72b5f5008f53f7eda001" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+44f3504e96c944ae54fc72b5f5008f53f7eda001" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ff621c9a700cf7ac1006b63afe1a8c68d41a69981bc085cb2fc624f2e7033a59
[INFO] running `Command { std: "docker" "start" "-a" "ff621c9a700cf7ac1006b63afe1a8c68d41a69981bc085cb2fc624f2e7033a59", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ff621c9a700cf7ac1006b63afe1a8c68d41a69981bc085cb2fc624f2e7033a59", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ff621c9a700cf7ac1006b63afe1a8c68d41a69981bc085cb2fc624f2e7033a59", kill_on_drop: false }`
[INFO] [stdout] ff621c9a700cf7ac1006b63afe1a8c68d41a69981bc085cb2fc624f2e7033a59
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+44f3504e96c944ae54fc72b5f5008f53f7eda001" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6b62d69745ebc685f87f40feeef487728380a5b63e33be6865311c8ddb598bc2
[INFO] running `Command { std: "docker" "start" "-a" "6b62d69745ebc685f87f40feeef487728380a5b63e33be6865311c8ddb598bc2", kill_on_drop: false }`
[INFO] [stderr]     Checking maybe-db v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/main.rs:100:17
[INFO] [stdout]     |
[INFO] [stdout] 99  |                 todo!("doesn't work");
[INFO] [stdout]     |                 --------------------- any code following this expression is unreachable
[INFO] [stdout] 100 |                 uname.push(self.username[i])
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/main.rs:107:17
[INFO] [stdout]     |
[INFO] [stdout] 106 |                 todo!("doesn't work");
[INFO] [stdout]     |                 --------------------- any code following this expression is unreachable
[INFO] [stdout] 107 |                 email.push(self.email[i])
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/main.rs:100:17
[INFO] [stdout]     |
[INFO] [stdout] 99  |                 todo!("doesn't work");
[INFO] [stdout]     |                 --------------------- any code following this expression is unreachable
[INFO] [stdout] 100 |                 uname.push(self.username[i])
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/main.rs:107:17
[INFO] [stdout]     |
[INFO] [stdout] 106 |                 todo!("doesn't work");
[INFO] [stdout]     |                 --------------------- any code following this expression is unreachable
[INFO] [stdout] 107 |                 email.push(self.email[i])
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:96:13
[INFO] [stdout]    |
[INFO] [stdout] 96 |         let mut uname = String::from("");
[INFO] [stdout]    |             ----^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:103:13
[INFO] [stdout]     |
[INFO] [stdout] 103 |         let mut email = String::from("");
[INFO] [stdout]     |             ----^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `COLUMN_USERNAME_SIZE` is never used
[INFO] [stdout]   --> src/main.rs:47:7
[INFO] [stdout]    |
[INFO] [stdout] 47 | const COLUMN_USERNAME_SIZE: u32 = 32;
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `COLUMN_EMAIL_SIZE` is never used
[INFO] [stdout]   --> src/main.rs:48:7
[INFO] [stdout]    |
[INFO] [stdout] 48 | const COLUMN_EMAIL_SIZE: u32 = 255;
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `ID_SIZE` is never used
[INFO] [stdout]   --> src/main.rs:50:7
[INFO] [stdout]    |
[INFO] [stdout] 50 | const ID_SIZE: u32 = 4;
[INFO] [stdout]    |       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `USERNAME_SIZE` is never used
[INFO] [stdout]   --> src/main.rs:51:7
[INFO] [stdout]    |
[INFO] [stdout] 51 | const USERNAME_SIZE: u32 = 32;
[INFO] [stdout]    |       ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `EMAIL_SIZE` is never used
[INFO] [stdout]   --> src/main.rs:53:7
[INFO] [stdout]    |
[INFO] [stdout] 53 | const EMAIL_SIZE: u32 = 255;
[INFO] [stdout]    |       ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `ID_OFFSET` is never used
[INFO] [stdout]   --> src/main.rs:55:7
[INFO] [stdout]    |
[INFO] [stdout] 55 | const ID_OFFSET: u32 = 0;
[INFO] [stdout]    |       ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `USERNAME_OFFSET` is never used
[INFO] [stdout]   --> src/main.rs:56:7
[INFO] [stdout]    |
[INFO] [stdout] 56 | const USERNAME_OFFSET: u32 = ID_OFFSET + ID_SIZE;
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `EMAIL_OFFSET` is never used
[INFO] [stdout]   --> src/main.rs:57:7
[INFO] [stdout]    |
[INFO] [stdout] 57 | const EMAIL_OFFSET: u32 = USERNAME_OFFSET + USERNAME_SIZE;
[INFO] [stdout]    |       ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `ROW_SIZE` is never used
[INFO] [stdout]   --> src/main.rs:58:7
[INFO] [stdout]    |
[INFO] [stdout] 58 | const ROW_SIZE: u32 = ID_SIZE + USERNAME_SIZE + EMAIL_SIZE;
[INFO] [stdout]    |       ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `PAGE_SIZE` is never used
[INFO] [stdout]   --> src/main.rs:60:7
[INFO] [stdout]    |
[INFO] [stdout] 60 | const PAGE_SIZE: u32 = 4096;
[INFO] [stdout]    |       ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `TABLE_MAX_PAGES` is never used
[INFO] [stdout]   --> src/main.rs:61:7
[INFO] [stdout]    |
[INFO] [stdout] 61 | const TABLE_MAX_PAGES: u32 = 100;
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `ROWS_PER_PAGE` is never used
[INFO] [stdout]   --> src/main.rs:62:7
[INFO] [stdout]    |
[INFO] [stdout] 62 | const ROWS_PER_PAGE: u32 = PAGE_SIZE / ROW_SIZE;
[INFO] [stdout]    |       ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `TABLE_MAX_ROWS` is never used
[INFO] [stdout]   --> src/main.rs:63:7
[INFO] [stdout]    |
[INFO] [stdout] 63 | const TABLE_MAX_ROWS: u32 = ROWS_PER_PAGE * TABLE_MAX_PAGES;
[INFO] [stdout]    |       ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Success` is never constructed
[INFO] [stdout]   --> src/main.rs:66:5
[INFO] [stdout]    |
[INFO] [stdout] 65 | enum MetaCommand {
[INFO] [stdout]    |      ----------- variant in this enum
[INFO] [stdout] 66 |     Success,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `SyntaxError` is never constructed
[INFO] [stdout]   --> src/main.rs:77:5
[INFO] [stdout]    |
[INFO] [stdout] 75 | enum PrepareResult {
[INFO] [stdout]    |      ------------- variant in this enum
[INFO] [stdout] 76 |     Success,
[INFO] [stdout] 77 |     SyntaxError,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Row` is never constructed
[INFO] [stdout]   --> src/main.rs:86:8
[INFO] [stdout]    |
[INFO] [stdout] 86 | struct Row {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:96:13
[INFO] [stdout]    |
[INFO] [stdout] 96 |         let mut uname = String::from("");
[INFO] [stdout]    |             ----^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:103:13
[INFO] [stdout]     |
[INFO] [stdout] 103 |         let mut email = String::from("");
[INFO] [stdout]     |             ----^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `COLUMN_USERNAME_SIZE` is never used
[INFO] [stdout]   --> src/main.rs:47:7
[INFO] [stdout]    |
[INFO] [stdout] 47 | const COLUMN_USERNAME_SIZE: u32 = 32;
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `COLUMN_EMAIL_SIZE` is never used
[INFO] [stdout]   --> src/main.rs:48:7
[INFO] [stdout]    |
[INFO] [stdout] 48 | const COLUMN_EMAIL_SIZE: u32 = 255;
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `ID_SIZE` is never used
[INFO] [stdout]   --> src/main.rs:50:7
[INFO] [stdout]    |
[INFO] [stdout] 50 | const ID_SIZE: u32 = 4;
[INFO] [stdout]    |       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `USERNAME_SIZE` is never used
[INFO] [stdout]   --> src/main.rs:51:7
[INFO] [stdout]    |
[INFO] [stdout] 51 | const USERNAME_SIZE: u32 = 32;
[INFO] [stdout]    |       ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `EMAIL_SIZE` is never used
[INFO] [stdout]   --> src/main.rs:53:7
[INFO] [stdout]    |
[INFO] [stdout] 53 | const EMAIL_SIZE: u32 = 255;
[INFO] [stdout]    |       ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `ID_OFFSET` is never used
[INFO] [stdout]   --> src/main.rs:55:7
[INFO] [stdout]    |
[INFO] [stdout] 55 | const ID_OFFSET: u32 = 0;
[INFO] [stdout]    |       ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `USERNAME_OFFSET` is never used
[INFO] [stdout]   --> src/main.rs:56:7
[INFO] [stdout]    |
[INFO] [stdout] 56 | const USERNAME_OFFSET: u32 = ID_OFFSET + ID_SIZE;
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `EMAIL_OFFSET` is never used
[INFO] [stdout]   --> src/main.rs:57:7
[INFO] [stdout]    |
[INFO] [stdout] 57 | const EMAIL_OFFSET: u32 = USERNAME_OFFSET + USERNAME_SIZE;
[INFO] [stdout]    |       ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `ROW_SIZE` is never used
[INFO] [stdout]   --> src/main.rs:58:7
[INFO] [stdout]    |
[INFO] [stdout] 58 | const ROW_SIZE: u32 = ID_SIZE + USERNAME_SIZE + EMAIL_SIZE;
[INFO] [stdout]    |       ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `PAGE_SIZE` is never used
[INFO] [stdout]   --> src/main.rs:60:7
[INFO] [stdout]    |
[INFO] [stdout] 60 | const PAGE_SIZE: u32 = 4096;
[INFO] [stdout]    |       ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `TABLE_MAX_PAGES` is never used
[INFO] [stdout]   --> src/main.rs:61:7
[INFO] [stdout]    |
[INFO] [stdout] 61 | const TABLE_MAX_PAGES: u32 = 100;
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `ROWS_PER_PAGE` is never used
[INFO] [stdout]   --> src/main.rs:62:7
[INFO] [stdout]    |
[INFO] [stdout] 62 | const ROWS_PER_PAGE: u32 = PAGE_SIZE / ROW_SIZE;
[INFO] [stdout]    |       ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `TABLE_MAX_ROWS` is never used
[INFO] [stdout]   --> src/main.rs:63:7
[INFO] [stdout]    |
[INFO] [stdout] 63 | const TABLE_MAX_ROWS: u32 = ROWS_PER_PAGE * TABLE_MAX_PAGES;
[INFO] [stdout]    |       ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Success` is never constructed
[INFO] [stdout]   --> src/main.rs:66:5
[INFO] [stdout]    |
[INFO] [stdout] 65 | enum MetaCommand {
[INFO] [stdout]    |      ----------- variant in this enum
[INFO] [stdout] 66 |     Success,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `SyntaxError` is never constructed
[INFO] [stdout]   --> src/main.rs:77:5
[INFO] [stdout]    |
[INFO] [stdout] 75 | enum PrepareResult {
[INFO] [stdout]    |      ------------- variant in this enum
[INFO] [stdout] 76 |     Success,
[INFO] [stdout] 77 |     SyntaxError,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Row` is never constructed
[INFO] [stdout]   --> src/main.rs:86:8
[INFO] [stdout]    |
[INFO] [stdout] 86 | struct Row {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.14s
[INFO] running `Command { std: "docker" "inspect" "6b62d69745ebc685f87f40feeef487728380a5b63e33be6865311c8ddb598bc2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6b62d69745ebc685f87f40feeef487728380a5b63e33be6865311c8ddb598bc2", kill_on_drop: false }`
[INFO] [stdout] 6b62d69745ebc685f87f40feeef487728380a5b63e33be6865311c8ddb598bc2
