[INFO] cloning repository https://github.com/ikorason/monkey_interpreter_rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ikorason/monkey_interpreter_rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fikorason%2Fmonkey_interpreter_rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fikorason%2Fmonkey_interpreter_rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8ba661f03b9dc30813cc1475693c22855a14ffc6
[INFO] checking ikorason/monkey_interpreter_rs against try#5d96fa0e954d77528204a1ba3b8847ec083c779b for pr-153457
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fikorason%2Fmonkey_interpreter_rs" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/ikorason/monkey_interpreter_rs
[INFO] finished tweaking git repo https://github.com/ikorason/monkey_interpreter_rs
[INFO] tweaked toml for git repo https://github.com/ikorason/monkey_interpreter_rs written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/ikorason/monkey_interpreter_rs on toolchain 5d96fa0e954d77528204a1ba3b8847ec083c779b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5d96fa0e954d77528204a1ba3b8847ec083c779b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/ikorason/monkey_interpreter_rs 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" "+5d96fa0e954d77528204a1ba3b8847ec083c779b" "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-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:cfa559dde23f44738f9990739aaa3487d8df3af37eb5df0572f7cf76004a604a" "/opt/rustwide/cargo-home/bin/cargo" "+5d96fa0e954d77528204a1ba3b8847ec083c779b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 022c912dcb1a64eaaaf163ee236ccc809413ee767dcdc86b915c27a4c6e3533f
[INFO] running `Command { std: "docker" "start" "-a" "022c912dcb1a64eaaaf163ee236ccc809413ee767dcdc86b915c27a4c6e3533f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "022c912dcb1a64eaaaf163ee236ccc809413ee767dcdc86b915c27a4c6e3533f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "022c912dcb1a64eaaaf163ee236ccc809413ee767dcdc86b915c27a4c6e3533f", kill_on_drop: false }`
[INFO] [stdout] 022c912dcb1a64eaaaf163ee236ccc809413ee767dcdc86b915c27a4c6e3533f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:cfa559dde23f44738f9990739aaa3487d8df3af37eb5df0572f7cf76004a604a" "/opt/rustwide/cargo-home/bin/cargo" "+5d96fa0e954d77528204a1ba3b8847ec083c779b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 65a1004ac6f5c2cd20cbb1ca8b0ba2c4256ec7816f581bae44b1c29d3c4e7792
[INFO] running `Command { std: "docker" "start" "-a" "65a1004ac6f5c2cd20cbb1ca8b0ba2c4256ec7816f581bae44b1c29d3c4e7792", kill_on_drop: false }`
[INFO] [stderr]     Checking monkey_interpreter_rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated items `read_identifier` and `isLetter` are never used
[INFO] [stdout]   --> src/lexer.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl Lexer {
[INFO] [stdout]    | ---------- associated items in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 34 |     fn read_identifier(&mut self) -> String {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 45 |     fn isLetter(ch: char) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `isLetter` should have a snake case name
[INFO] [stdout]   --> src/lexer.rs:45:8
[INFO] [stdout]    |
[INFO] [stdout] 45 |     fn isLetter(ch: char) -> bool {
[INFO] [stdout]    |        ^^^^^^^^ help: convert the identifier to snake case: `is_letter`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `read_identifier` and `isLetter` are never used
[INFO] [stdout]   --> src/lexer.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl Lexer {
[INFO] [stdout]    | ---------- associated items in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 34 |     fn read_identifier(&mut self) -> String {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 45 |     fn isLetter(ch: char) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `isLetter` should have a snake case name
[INFO] [stdout]   --> src/lexer.rs:45:8
[INFO] [stdout]    |
[INFO] [stdout] 45 |     fn isLetter(ch: char) -> bool {
[INFO] [stdout]    |        ^^^^^^^^ help: convert the identifier to snake case: `is_letter`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.27s
[INFO] running `Command { std: "docker" "inspect" "65a1004ac6f5c2cd20cbb1ca8b0ba2c4256ec7816f581bae44b1c29d3c4e7792", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "65a1004ac6f5c2cd20cbb1ca8b0ba2c4256ec7816f581bae44b1c29d3c4e7792", kill_on_drop: false }`
[INFO] [stdout] 65a1004ac6f5c2cd20cbb1ca8b0ba2c4256ec7816f581bae44b1c29d3c4e7792