[INFO] cloning repository https://github.com/litarussell/SysY-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/litarussell/SysY-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flitarussell%2FSysY-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flitarussell%2FSysY-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 36262303d8647def73ba4a68d6a0e3b8caa326f7
[INFO] checking litarussell/SysY-rust against try#ed606620234c6b50f2414162c4bbabd5f4a925f3 for pr-147995
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flitarussell%2FSysY-rust" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/litarussell/SysY-rust
[INFO] finished tweaking git repo https://github.com/litarussell/SysY-rust
[INFO] tweaked toml for git repo https://github.com/litarussell/SysY-rust written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/litarussell/SysY-rust on toolchain ed606620234c6b50f2414162c4bbabd5f4a925f3
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ed606620234c6b50f2414162c4bbabd5f4a925f3" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/litarussell/SysY-rust 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" "+ed606620234c6b50f2414162c4bbabd5f4a925f3" "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 litarussell/SysY-rust against try#ed606620234c6b50f2414162c4bbabd5f4a925f3 for pr-147995
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flitarussell%2FSysY-rust" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/litarussell/SysY-rust
[INFO] finished tweaking git repo https://github.com/litarussell/SysY-rust
[INFO] tweaked toml for git repo https://github.com/litarussell/SysY-rust written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/litarussell/SysY-rust on toolchain ed606620234c6b50f2414162c4bbabd5f4a925f3
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ed606620234c6b50f2414162c4bbabd5f4a925f3" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/litarussell/SysY-rust 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" "+ed606620234c6b50f2414162c4bbabd5f4a925f3" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded key-node-list v0.0.5
[INFO] [stderr]   Downloaded koopa v0.0.7
[INFO] [stderr]   Downloaded syn v2.0.70
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ed606620234c6b50f2414162c4bbabd5f4a925f3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bec98166b67453134050c446dba24b562a1a92f2c451b25b41a30acfb19d6b72
[INFO] running `Command { std: "docker" "start" "-a" "bec98166b67453134050c446dba24b562a1a92f2c451b25b41a30acfb19d6b72", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bec98166b67453134050c446dba24b562a1a92f2c451b25b41a30acfb19d6b72", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bec98166b67453134050c446dba24b562a1a92f2c451b25b41a30acfb19d6b72", kill_on_drop: false }`
[INFO] [stdout] bec98166b67453134050c446dba24b562a1a92f2c451b25b41a30acfb19d6b72
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ed606620234c6b50f2414162c4bbabd5f4a925f3" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ad05eefbb4d06e1eb5a5173a11e47e336b9736a9ed79ca03f7728b0eede02cc7
[INFO] running `Command { std: "docker" "start" "-a" "ad05eefbb4d06e1eb5a5173a11e47e336b9736a9ed79ca03f7728b0eede02cc7", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.155
[INFO] [stderr]    Compiling regex-syntax v0.8.4
[INFO] [stderr]    Compiling tiny-keccak v2.0.2
[INFO] [stderr]    Compiling hashbrown v0.14.5
[INFO] [stderr]    Compiling log v0.4.22
[INFO] [stderr]    Compiling parking_lot_core v0.9.10
[INFO] [stderr]    Compiling crunchy v0.2.2
[INFO] [stderr]    Compiling unicode-xid v0.2.4
[INFO] [stderr]    Compiling lock_api v0.4.12
[INFO] [stderr]    Compiling pico-args v0.5.0
[INFO] [stderr]     Checking key-node-list v0.0.5
[INFO] [stderr]    Compiling ena v0.14.3
[INFO] [stderr]     Checking koopa v0.0.7
[INFO] [stderr]    Compiling indexmap v2.2.6
[INFO] [stderr]    Compiling dirs-sys-next v0.1.2
[INFO] [stderr]    Compiling dirs-next v2.0.0
[INFO] [stderr]    Compiling term v0.7.0
[INFO] [stderr]    Compiling parking_lot v0.12.3
[INFO] [stderr]    Compiling petgraph v0.6.5
[INFO] [stderr]    Compiling ascii-canvas v3.0.0
[INFO] [stderr]     Checking regex-automata v0.4.7
[INFO] [stderr]    Compiling string_cache v0.8.7
[INFO] [stderr]     Checking lalrpop-util v0.20.2
[INFO] [stderr]    Compiling regex v1.10.5
[INFO] [stderr]    Compiling lalrpop v0.20.2
[INFO] [stderr]    Compiling SysY-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `mode`
[INFO] [stdout]   --> src/main.rs:16:7
[INFO] [stdout]    |
[INFO] [stdout] 16 |   let mode = args.next().unwrap();
[INFO] [stdout]    |       ^^^^ help: if this is intentional, prefix it with an underscore: `_mode`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `output`
[INFO] [stdout]   --> src/main.rs:19:7
[INFO] [stdout]    |
[INFO] [stdout] 19 |   let output = args.next().unwrap();
[INFO] [stdout]    |       ^^^^^^ help: if this is intentional, prefix it with an underscore: `_output`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `func_def` is never read
[INFO] [stdout]   --> src/ast.rs:17:7
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub struct CompUnit {
[INFO] [stdout]    |            -------- field in this struct
[INFO] [stdout] 17 |   pub func_def: FuncDef,
[INFO] [stdout]    |       ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `CompUnit` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `func_type`, `ident`, and `block` are never read
[INFO] [stdout]   --> src/ast.rs:22:7
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub struct FuncDef {
[INFO] [stdout]    |            ------- fields in this struct
[INFO] [stdout] 22 |   pub func_type: FuncType,
[INFO] [stdout]    |       ^^^^^^^^^
[INFO] [stdout] 23 |   pub ident: String,
[INFO] [stdout]    |       ^^^^^
[INFO] [stdout] 24 |   pub block: Block,
[INFO] [stdout]    |       ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `FuncDef` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `stmt` is never read
[INFO] [stdout]   --> src/ast.rs:34:7
[INFO] [stdout]    |
[INFO] [stdout] 33 | pub struct Block {
[INFO] [stdout]    |            ----- field in this struct
[INFO] [stdout] 34 |   pub stmt: Stmt
[INFO] [stdout]    |       ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Block` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `num` is never read
[INFO] [stdout]   --> src/ast.rs:39:7
[INFO] [stdout]    |
[INFO] [stdout] 38 | pub struct Stmt {
[INFO] [stdout]    |            ---- field in this struct
[INFO] [stdout] 39 |   pub num: Number
[INFO] [stdout]    |       ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Stmt` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `value` is never read
[INFO] [stdout]   --> src/ast.rs:45:7
[INFO] [stdout]    |
[INFO] [stdout] 44 | pub struct Number {
[INFO] [stdout]    |            ------ field in this struct
[INFO] [stdout] 45 |   pub value: i32
[INFO] [stdout]    |       ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Number` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `mode`
[INFO] [stdout]   --> src/main.rs:16:7
[INFO] [stdout]    |
[INFO] [stdout] 16 |   let mode = args.next().unwrap();
[INFO] [stdout]    |       ^^^^ help: if this is intentional, prefix it with an underscore: `_mode`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `output`
[INFO] [stdout]   --> src/main.rs:19:7
[INFO] [stdout]    |
[INFO] [stdout] 19 |   let output = args.next().unwrap();
[INFO] [stdout]    |       ^^^^^^ help: if this is intentional, prefix it with an underscore: `_output`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `func_def` is never read
[INFO] [stdout]   --> src/ast.rs:17:7
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub struct CompUnit {
[INFO] [stdout]    |            -------- field in this struct
[INFO] [stdout] 17 |   pub func_def: FuncDef,
[INFO] [stdout]    |       ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `CompUnit` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `func_type`, `ident`, and `block` are never read
[INFO] [stdout]   --> src/ast.rs:22:7
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub struct FuncDef {
[INFO] [stdout]    |            ------- fields in this struct
[INFO] [stdout] 22 |   pub func_type: FuncType,
[INFO] [stdout]    |       ^^^^^^^^^
[INFO] [stdout] 23 |   pub ident: String,
[INFO] [stdout]    |       ^^^^^
[INFO] [stdout] 24 |   pub block: Block,
[INFO] [stdout]    |       ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `FuncDef` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `stmt` is never read
[INFO] [stdout]   --> src/ast.rs:34:7
[INFO] [stdout]    |
[INFO] [stdout] 33 | pub struct Block {
[INFO] [stdout]    |            ----- field in this struct
[INFO] [stdout] 34 |   pub stmt: Stmt
[INFO] [stdout]    |       ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Block` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `num` is never read
[INFO] [stdout]   --> src/ast.rs:39:7
[INFO] [stdout]    |
[INFO] [stdout] 38 | pub struct Stmt {
[INFO] [stdout]    |            ---- field in this struct
[INFO] [stdout] 39 |   pub num: Number
[INFO] [stdout]    |       ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Stmt` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `value` is never read
[INFO] [stdout]   --> src/ast.rs:45:7
[INFO] [stdout]    |
[INFO] [stdout] 44 | pub struct Number {
[INFO] [stdout]    |            ------ field in this struct
[INFO] [stdout] 45 |   pub value: i32
[INFO] [stdout]    |       ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Number` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 20.19s
[INFO] running `Command { std: "docker" "inspect" "ad05eefbb4d06e1eb5a5173a11e47e336b9736a9ed79ca03f7728b0eede02cc7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ad05eefbb4d06e1eb5a5173a11e47e336b9736a9ed79ca03f7728b0eede02cc7", kill_on_drop: false }`
[INFO] [stdout] ad05eefbb4d06e1eb5a5173a11e47e336b9736a9ed79ca03f7728b0eede02cc7