[INFO] cloning repository https://github.com/sangwon090/mamba
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sangwon090/mamba" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsangwon090%2Fmamba", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsangwon090%2Fmamba'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0c41fbbc33c01b1a2504ebfdab3f192c69835c1c
[INFO] checking sangwon090/mamba against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsangwon090%2Fmamba" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sangwon090/mamba on toolchain 1f12b9b0fdbe735968ac002792a720f0ba4faca6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/sangwon090/mamba
[INFO] finished tweaking git repo https://github.com/sangwon090/mamba
[INFO] tweaked toml for git repo https://github.com/sangwon090/mamba written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/sangwon090/mamba 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" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a0eeb73053d251b9846f519cf3e2fb0854666717f9301d03073055193efc8a24
[INFO] running `Command { std: "docker" "start" "-a" "a0eeb73053d251b9846f519cf3e2fb0854666717f9301d03073055193efc8a24", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a0eeb73053d251b9846f519cf3e2fb0854666717f9301d03073055193efc8a24", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a0eeb73053d251b9846f519cf3e2fb0854666717f9301d03073055193efc8a24", kill_on_drop: false }`
[INFO] [stdout] a0eeb73053d251b9846f519cf3e2fb0854666717f9301d03073055193efc8a24
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d9e6978d6862edb037aaaca120c16e163325002b51072afca4fdbbda75e71356
[INFO] running `Command { std: "docker" "start" "-a" "d9e6978d6862edb037aaaca120c16e163325002b51072afca4fdbbda75e71356", kill_on_drop: false }`
[INFO] [stderr]     Checking mamba v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Expression`
[INFO] [stdout]  --> src/irgen/mod.rs:4:59
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::parser::ast::{AbstractSyntaxTree, AstNodeType, Expression};
[INFO] [stdout]   |                                                           ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `token`
[INFO] [stdout]    --> src/parser/ast.rs:108:38
[INFO] [stdout]     |
[INFO] [stdout] 108 |         let expression = if let Some(token) = parser.next(0) {
[INFO] [stdout]     |                                      ^^^^^ help: if this is intentional, prefix it with an underscore: `_token`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Expression`
[INFO] [stdout]  --> src/irgen/mod.rs:4:59
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::parser::ast::{AbstractSyntaxTree, AstNodeType, Expression};
[INFO] [stdout]   |                                                           ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `token`
[INFO] [stdout]    --> src/parser/ast.rs:108:38
[INFO] [stdout]     |
[INFO] [stdout] 108 |         let expression = if let Some(token) = parser.next(0) {
[INFO] [stdout]     |                                      ^^^^^ help: if this is intentional, prefix it with an underscore: `_token`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ir`
[INFO] [stdout]   --> src/main.rs:30:17
[INFO] [stdout]    |
[INFO] [stdout] 30 |             let ir = irgen.generate_ir().unwrap();
[INFO] [stdout]    |                 ^^ help: if this is intentional, prefix it with an underscore: `_ir`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Identifier`, `Keyword`, and `Literal`
[INFO] [stdout]  --> tests/parser.rs:1:34
[INFO] [stdout]   |
[INFO] [stdout] 1 | use mamba::lexer::{Lexer, Token, Keyword, Literal, Identifier};
[INFO] [stdout]   |                                  ^^^^^^^  ^^^^^^^  ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ir`
[INFO] [stdout]   --> src/main.rs:30:17
[INFO] [stdout]    |
[INFO] [stdout] 30 |             let ir = irgen.generate_ir().unwrap();
[INFO] [stdout]    |                 ^^ help: if this is intentional, prefix it with an underscore: `_ir`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.39s
[INFO] running `Command { std: "docker" "inspect" "d9e6978d6862edb037aaaca120c16e163325002b51072afca4fdbbda75e71356", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d9e6978d6862edb037aaaca120c16e163325002b51072afca4fdbbda75e71356", kill_on_drop: false }`
[INFO] [stdout] d9e6978d6862edb037aaaca120c16e163325002b51072afca4fdbbda75e71356