[INFO] cloning repository https://github.com/mk0218/Some
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mk0218/Some" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmk0218%2FSome", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmk0218%2FSome'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 95c45f6c2a11467c24777e98d4ebc06574055cbb
[INFO] checking mk0218/Some against master#d2e8ecd8bd26a22111cdebfb813258450b07fbf0 for pr-121199
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmk0218%2FSome" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mk0218/Some on toolchain d2e8ecd8bd26a22111cdebfb813258450b07fbf0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d2e8ecd8bd26a22111cdebfb813258450b07fbf0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mk0218/Some
[INFO] finished tweaking git repo https://github.com/mk0218/Some
[INFO] tweaked toml for git repo https://github.com/mk0218/Some written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/mk0218/Some 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" "+d2e8ecd8bd26a22111cdebfb813258450b07fbf0" "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 mk0218/Some against try#aface909a877127f24c62858518cef2d593e2ea1 for pr-121199
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmk0218%2FSome" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mk0218/Some on toolchain aface909a877127f24c62858518cef2d593e2ea1
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+aface909a877127f24c62858518cef2d593e2ea1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mk0218/Some
[INFO] finished tweaking git repo https://github.com/mk0218/Some
[INFO] tweaked toml for git repo https://github.com/mk0218/Some written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/mk0218/Some 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" "+aface909a877127f24c62858518cef2d593e2ea1" "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
[ERROR] error running command: no output for 300 seconds
[INFO] checking mk0218/Some against try#aface909a877127f24c62858518cef2d593e2ea1 for pr-121199
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmk0218%2FSome" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mk0218/Some on toolchain aface909a877127f24c62858518cef2d593e2ea1
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+aface909a877127f24c62858518cef2d593e2ea1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mk0218/Some
[INFO] finished tweaking git repo https://github.com/mk0218/Some
[INFO] tweaked toml for git repo https://github.com/mk0218/Some written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/mk0218/Some 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" "+aface909a877127f24c62858518cef2d593e2ea1" "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-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+aface909a877127f24c62858518cef2d593e2ea1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 18b4941c6d0197895a080d6c14a36fa008f0e4fd8f7e49f73aef0c62b8479075
[INFO] running `Command { std: "docker" "start" "-a" "18b4941c6d0197895a080d6c14a36fa008f0e4fd8f7e49f73aef0c62b8479075", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "18b4941c6d0197895a080d6c14a36fa008f0e4fd8f7e49f73aef0c62b8479075", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "18b4941c6d0197895a080d6c14a36fa008f0e4fd8f7e49f73aef0c62b8479075", kill_on_drop: false }`
[INFO] [stdout] 18b4941c6d0197895a080d6c14a36fa008f0e4fd8f7e49f73aef0c62b8479075
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+aface909a877127f24c62858518cef2d593e2ea1" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 954badcaa30d68508beaa718462a956271fa9c75045b8ad5da035e971aa49b94
[INFO] running `Command { std: "docker" "start" "-a" "954badcaa30d68508beaa718462a956271fa9c75045b8ad5da035e971aa49b94", kill_on_drop: false }`
[INFO] [stderr]     Checking some v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `Identifier` is never constructed
[INFO] [stdout]  --> src/syntax.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Identifier(String);
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Enclosure` is never used
[INFO] [stdout]  --> src/syntax.rs:3:6
[INFO] [stdout]   |
[INFO] [stdout] 3 | enum Enclosure {
[INFO] [stdout]   |      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Literal` is never used
[INFO] [stdout]   --> src/syntax.rs:12:6
[INFO] [stdout]    |
[INFO] [stdout] 12 | enum Literal {
[INFO] [stdout]    |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Value` is never used
[INFO] [stdout]   --> src/syntax.rs:18:6
[INFO] [stdout]    |
[INFO] [stdout] 18 | enum Value {
[INFO] [stdout]    |      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `ArithmeticOperation` is never used
[INFO] [stdout]   --> src/syntax.rs:22:6
[INFO] [stdout]    |
[INFO] [stdout] 22 | enum ArithmeticOperation {
[INFO] [stdout]    |      ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Expr` is never used
[INFO] [stdout]   --> src/syntax.rs:29:6
[INFO] [stdout]    |
[INFO] [stdout] 29 | enum Expr {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Stmt` is never used
[INFO] [stdout]   --> src/syntax.rs:35:6
[INFO] [stdout]    |
[INFO] [stdout] 35 | enum Stmt {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `AssignmentStmt` is never constructed
[INFO] [stdout]   --> src/syntax.rs:39:8
[INFO] [stdout]    |
[INFO] [stdout] 39 | struct AssignmentStmt(Identifier, Expr);
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Program` is never constructed
[INFO] [stdout]   --> src/syntax.rs:41:8
[INFO] [stdout]    |
[INFO] [stdout] 41 | struct Program(Vec<Stmt>, Expr);
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Space` and `Chars` are never constructed
[INFO] [stdout]  --> src/parser/buffer.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub enum BufferState {
[INFO] [stdout]   |          ----------- variants in this enum
[INFO] [stdout] 7 |     Idle,
[INFO] [stdout] 8 |     Space,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 9 |     Chars,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Identifier` is never constructed
[INFO] [stdout]  --> src/syntax.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Identifier(String);
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Enclosure` is never used
[INFO] [stdout]  --> src/syntax.rs:3:6
[INFO] [stdout]   |
[INFO] [stdout] 3 | enum Enclosure {
[INFO] [stdout]   |      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Literal` is never used
[INFO] [stdout]   --> src/syntax.rs:12:6
[INFO] [stdout]    |
[INFO] [stdout] 12 | enum Literal {
[INFO] [stdout]    |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Value` is never used
[INFO] [stdout]   --> src/syntax.rs:18:6
[INFO] [stdout]    |
[INFO] [stdout] 18 | enum Value {
[INFO] [stdout]    |      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `ArithmeticOperation` is never used
[INFO] [stdout]   --> src/syntax.rs:22:6
[INFO] [stdout]    |
[INFO] [stdout] 22 | enum ArithmeticOperation {
[INFO] [stdout]    |      ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Expr` is never used
[INFO] [stdout]   --> src/syntax.rs:29:6
[INFO] [stdout]    |
[INFO] [stdout] 29 | enum Expr {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Stmt` is never used
[INFO] [stdout]   --> src/syntax.rs:35:6
[INFO] [stdout]    |
[INFO] [stdout] 35 | enum Stmt {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `AssignmentStmt` is never constructed
[INFO] [stdout]   --> src/syntax.rs:39:8
[INFO] [stdout]    |
[INFO] [stdout] 39 | struct AssignmentStmt(Identifier, Expr);
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Program` is never constructed
[INFO] [stdout]   --> src/syntax.rs:41:8
[INFO] [stdout]    |
[INFO] [stdout] 41 | struct Program(Vec<Stmt>, Expr);
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Space` and `Chars` are never constructed
[INFO] [stdout]  --> src/parser/buffer.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub enum BufferState {
[INFO] [stdout]   |          ----------- variants in this enum
[INFO] [stdout] 7 |     Idle,
[INFO] [stdout] 8 |     Space,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 9 |     Chars,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/parser/parser.rs:22:13
[INFO] [stdout]    |
[INFO] [stdout] 22 |             parser.read_line(&line);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 22 |             let _ = parser.read_line(&line);
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/parser/parser.rs:22:13
[INFO] [stdout]    |
[INFO] [stdout] 22 |             parser.read_line(&line);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 22 |             let _ = parser.read_line(&line);
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.12s
[INFO] running `Command { std: "docker" "inspect" "954badcaa30d68508beaa718462a956271fa9c75045b8ad5da035e971aa49b94", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "954badcaa30d68508beaa718462a956271fa9c75045b8ad5da035e971aa49b94", kill_on_drop: false }`
[INFO] [stdout] 954badcaa30d68508beaa718462a956271fa9c75045b8ad5da035e971aa49b94