[INFO] updating cached repository https://github.com/riku179/monkey-lang-rust
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] [stderr] From https://github.com/riku179/monkey-lang-rust
[INFO] [stderr]    6e28251..c34226c  master     -> master
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c34226cbe262dc93cc8cae1ca5947d4246457b6b
[INFO] checking riku179/monkey-lang-rust against master#6dee5f1126dfd5c9314ee5ae9d9eb010e35ef257 for pr-70872
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Friku179%2Fmonkey-lang-rust" "/workspace/builds/worker-5/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/riku179/monkey-lang-rust on toolchain 6dee5f1126dfd5c9314ee5ae9d9eb010e35ef257
[INFO] running `"/workspace/cargo-home/bin/cargo" "+6dee5f1126dfd5c9314ee5ae9d9eb010e35ef257" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/riku179/monkey-lang-rust
[INFO] finished tweaking git repo https://github.com/riku179/monkey-lang-rust
[INFO] tweaked toml for git repo https://github.com/riku179/monkey-lang-rust written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/riku179/monkey-lang-rust already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+6dee5f1126dfd5c9314ee5ae9d9eb010e35ef257" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+6dee5f1126dfd5c9314ee5ae9d9eb010e35ef257" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 4a59b9e87738732f0b72cabada58ab25c851cdb47b59cf0466bd27e8d531776f
[INFO] running `"docker" "start" "-a" "4a59b9e87738732f0b72cabada58ab25c851cdb47b59cf0466bd27e8d531776f"`
[INFO] [stderr]     Checking ascii v1.0.0
[INFO] [stderr]     Checking monkey_lang v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: function is never used: `test_eval`
[INFO] [stderr]  --> src/evaluator/test.rs:6:4
[INFO] [stderr]   |
[INFO] [stderr] 6 | fn test_eval(input: &str) -> Option<Object> {
[INFO] [stderr]   |    ^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Null`
[INFO] [stderr]  --> src/object/mod.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     Null,
[INFO] [stderr]   |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `check_expr`
[INFO] [stderr]   --> src/parser/test_util.rs:33:8
[INFO] [stderr]    |
[INFO] [stderr] 33 | pub fn check_expr<T: Literable>(expr: &Expr, val: T) {
[INFO] [stderr]    |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `check_stmt`
[INFO] [stderr]   --> src/parser/test_util.rs:37:8
[INFO] [stderr]    |
[INFO] [stderr] 37 | pub fn check_stmt<T: Literable>(stmt: &Stmt, val: T) {
[INFO] [stderr]    |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `check_infix_expr`
[INFO] [stderr]   --> src/parser/test_util.rs:41:8
[INFO] [stderr]    |
[INFO] [stderr] 41 | pub fn check_infix_expr<T: Literable>(
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `check_infix_stmt`
[INFO] [stderr]   --> src/parser/test_util.rs:56:8
[INFO] [stderr]    |
[INFO] [stderr] 56 | pub fn check_infix_stmt<T: Literable>(
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `check_let_stmt`
[INFO] [stderr]   --> src/parser/test_util.rs:69:8
[INFO] [stderr]    |
[INFO] [stderr] 69 | pub fn check_let_stmt(stmt: &Stmt, expected_name: &str) {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `ILLEGAL`
[INFO] [stderr]  --> src/token/mod.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     ILLEGAL,
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Null`
[INFO] [stderr]  --> src/object/mod.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     Null,
[INFO] [stderr]   |     ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `check_let_stmt`
[INFO] [stderr]   --> src/parser/test_util.rs:69:8
[INFO] [stderr]    |
[INFO] [stderr] 69 | pub fn check_let_stmt(stmt: &Stmt, expected_name: &str) {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `ILLEGAL`
[INFO] [stderr]  --> src/token/mod.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     ILLEGAL,
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.19s
[INFO] running `"docker" "inspect" "4a59b9e87738732f0b72cabada58ab25c851cdb47b59cf0466bd27e8d531776f"`
[INFO] running `"docker" "rm" "-f" "4a59b9e87738732f0b72cabada58ab25c851cdb47b59cf0466bd27e8d531776f"`
[INFO] [stdout] 4a59b9e87738732f0b72cabada58ab25c851cdb47b59cf0466bd27e8d531776f