[INFO] cloning repository https://github.com/MahbodGhadiri/monkey_lang
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/MahbodGhadiri/monkey_lang" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMahbodGhadiri%2Fmonkey_lang", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMahbodGhadiri%2Fmonkey_lang'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2509124ccd7428f76730e3a7da169c1acb5a1375
[INFO] checking MahbodGhadiri/monkey_lang against try#93086cfebfccb79083c59d0d3b2052944bba643c for pr-146440-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMahbodGhadiri%2Fmonkey_lang" "/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/MahbodGhadiri/monkey_lang
[INFO] finished tweaking git repo https://github.com/MahbodGhadiri/monkey_lang
[INFO] tweaked toml for git repo https://github.com/MahbodGhadiri/monkey_lang written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/MahbodGhadiri/monkey_lang on toolchain 93086cfebfccb79083c59d0d3b2052944bba643c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+93086cfebfccb79083c59d0d3b2052944bba643c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/MahbodGhadiri/monkey_lang 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" "+93086cfebfccb79083c59d0d3b2052944bba643c" "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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+93086cfebfccb79083c59d0d3b2052944bba643c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a0b42cd6cb7cd13a7f827d1a2b514ade39e511d94a20829820e95574a4e4a958
[INFO] running `Command { std: "docker" "start" "-a" "a0b42cd6cb7cd13a7f827d1a2b514ade39e511d94a20829820e95574a4e4a958", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a0b42cd6cb7cd13a7f827d1a2b514ade39e511d94a20829820e95574a4e4a958", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a0b42cd6cb7cd13a7f827d1a2b514ade39e511d94a20829820e95574a4e4a958", kill_on_drop: false }`
[INFO] [stdout] a0b42cd6cb7cd13a7f827d1a2b514ade39e511d94a20829820e95574a4e4a958
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+93086cfebfccb79083c59d0d3b2052944bba643c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 55b22b0b0fca69225166170c6413a56204495317162617a282a0ebb967c69f7b
[INFO] running `Command { std: "docker" "start" "-a" "55b22b0b0fca69225166170c6413a56204495317162617a282a0ebb967c69f7b", kill_on_drop: false }`
[INFO] [stderr]     Checking monkey_lang v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: struct `Program` is never constructed
[INFO] [stdout]   --> src/ast/mod.rs:30:12
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub struct Program {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout]    = note: `#[deny(unused_unconstructable_pub_structs)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `Program` is never constructed
[INFO] [stdout]   --> src/ast/mod.rs:30:12
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub struct Program {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout]    = note: `#[deny(unused_unconstructable_pub_structs)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `token` is never read
[INFO] [stdout]  --> src/ast/mod.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct Node {
[INFO] [stdout]   |            ---- field in this struct
[INFO] [stdout] 5 |     token: token::Token,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Node` 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: field `token` is never read
[INFO] [stdout]  --> src/ast/mod.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct Node {
[INFO] [stdout]   |            ---- field in this struct
[INFO] [stdout] 5 |     token: token::Token,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Node` 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: method `get_token` is never used
[INFO] [stdout]   --> src/ast/mod.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout]  8 | impl Node {
[INFO] [stdout]    | --------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 13 |     fn get_token(&self) -> &token::Token {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_token` is never used
[INFO] [stdout]   --> src/ast/mod.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout]  8 | impl Node {
[INFO] [stdout]    | --------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 13 |     fn get_token(&self) -> &token::Token {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `statements` is never read
[INFO] [stdout]   --> src/ast/mod.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub struct Program {
[INFO] [stdout]    |            ------- field in this struct
[INFO] [stdout] 31 |     statements: Vec<Statement>,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `statements` is never read
[INFO] [stdout]   --> src/ast/mod.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub struct Program {
[INFO] [stdout]    |            ------- field in this struct
[INFO] [stdout] 31 |     statements: Vec<Statement>,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_token` is never used
[INFO] [stdout]   --> src/ast/mod.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 34 | impl Program {
[INFO] [stdout]    | ------------ method in this implementation
[INFO] [stdout] 35 |     fn get_token(&self) -> Option<&Statement> {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_token` is never used
[INFO] [stdout]   --> src/ast/mod.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 34 | impl Program {
[INFO] [stdout]    | ------------ method in this implementation
[INFO] [stdout] 35 |     fn get_token(&self) -> Option<&Statement> {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `node`, `name`, and `value` are never read
[INFO] [stdout]   --> src/ast/mod.rs:45:5
[INFO] [stdout]    |
[INFO] [stdout] 44 | pub struct LetStatement {
[INFO] [stdout]    |            ------------ fields in this struct
[INFO] [stdout] 45 |     node: Node,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 46 |     name: token::Token,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 47 |     value: Expression,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `LetStatement` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `node`, `name`, and `value` are never read
[INFO] [stdout]   --> src/ast/mod.rs:45:5
[INFO] [stdout]    |
[INFO] [stdout] 44 | pub struct LetStatement {
[INFO] [stdout]    |            ------------ fields in this struct
[INFO] [stdout] 45 |     node: Node,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 46 |     name: token::Token,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 47 |     value: Expression,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `LetStatement` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `node` and `value` are never read
[INFO] [stdout]   --> src/ast/mod.rs:52:5
[INFO] [stdout]    |
[INFO] [stdout] 51 | pub struct ReturnStatement {
[INFO] [stdout]    |            --------------- fields in this struct
[INFO] [stdout] 52 |     node: Node,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 53 |     value: Expression,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ReturnStatement` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `node` and `value` are never read
[INFO] [stdout]   --> src/ast/mod.rs:52:5
[INFO] [stdout]    |
[INFO] [stdout] 51 | pub struct ReturnStatement {
[INFO] [stdout]    |            --------------- fields in this struct
[INFO] [stdout] 52 |     node: Node,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 53 |     value: Expression,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ReturnStatement` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `file` and `finish_char` are never read
[INFO] [stdout]   --> src/lexer/token.rs:46:5
[INFO] [stdout]    |
[INFO] [stdout] 44 | pub struct Token {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] 45 |     t_type: TokenType,
[INFO] [stdout] 46 |     file: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 49 |     finish_char: u32,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Token` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `file` and `finish_char` are never read
[INFO] [stdout]   --> src/lexer/token.rs:46:5
[INFO] [stdout]    |
[INFO] [stdout] 44 | pub struct Token {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] 45 |     t_type: TokenType,
[INFO] [stdout] 46 |     file: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 49 |     finish_char: u32,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Token` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `monkey_lang` (bin "monkey_lang" test) due to 1 previous error; 7 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `monkey_lang` (bin "monkey_lang") due to 1 previous error; 7 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "55b22b0b0fca69225166170c6413a56204495317162617a282a0ebb967c69f7b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "55b22b0b0fca69225166170c6413a56204495317162617a282a0ebb967c69f7b", kill_on_drop: false }`
[INFO] [stdout] 55b22b0b0fca69225166170c6413a56204495317162617a282a0ebb967c69f7b