[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] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 4e87a096504b96df0b6ffd15c8567f777960e32c
[INFO] checking riku179/monkey-lang-rust against master#fdc0011561c6365c596dfd8fa1ef388162bc89c7 for pr-66504-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Friku179%2Fmonkey-lang-rust" "/workspace/builds/worker-14/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/riku179/monkey-lang-rust on toolchain fdc0011561c6365c596dfd8fa1ef388162bc89c7
[INFO] running `"/workspace/cargo-home/bin/cargo" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "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-14/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" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "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] 63e9df8f5af038ee8b54311020dc7ce283c3db4546a552a04f9a7451af1a15f5
[INFO] running `"docker" "start" "-a" "63e9df8f5af038ee8b54311020dc7ce283c3db4546a552a04f9a7451af1a15f5"`
[INFO] [stderr]     Checking ascii v0.9.1
[INFO] [stderr]     Checking monkey_lang v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `ascii::AsciiString`
[INFO] [stderr]  --> src/repl/mod.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use ascii::AsciiString;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::str::FromStr`
[INFO] [stderr]  --> src/repl/mod.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::str::FromStr;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::token::Token`
[INFO] [stderr]  --> src/repl/mod.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use crate::token::Token;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Debug`, `Display`
[INFO] [stderr]  --> src/evaluator/mod.rs:1:16
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::fmt::{Debug, Display};
[INFO] [stderr]   |                ^^^^^  ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Ident`
[INFO] [stderr]  --> src/evaluator/mod.rs:2:27
[INFO] [stderr]   |
[INFO] [stderr] 2 | use crate::ast::{Program, Ident, Stmt, Expr, Literal, Prefix, Infix};
[INFO] [stderr]   |                           ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `ascii::AsciiString`
[INFO] [stderr]  --> src/parser/test.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use ascii::AsciiString;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::test_util::Literable`
[INFO] [stderr]  --> src/parser/test.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use super::test_util::Literable;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `ascii::AsciiString`
[INFO] [stderr]  --> src/repl/mod.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use ascii::AsciiString;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::str::FromStr`
[INFO] [stderr]  --> src/repl/mod.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::str::FromStr;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::token::Token`
[INFO] [stderr]  --> src/repl/mod.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use crate::token::Token;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Debug`, `Display`
[INFO] [stderr]  --> src/evaluator/mod.rs:1:16
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::fmt::{Debug, Display};
[INFO] [stderr]   |                ^^^^^  ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Ident`
[INFO] [stderr]  --> src/evaluator/mod.rs:2:27
[INFO] [stderr]   |
[INFO] [stderr] 2 | use crate::ast::{Program, Ident, Stmt, Expr, Literal, Prefix, Infix};
[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]    = note: `#[warn(dead_code)]` on by default
[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>(expr: &Expr, expected_left: T, expected_infix: Infix, expected_right: T) {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `check_infix_stmt`
[INFO] [stderr]   --> src/parser/test_util.rs:51:8
[INFO] [stderr]    |
[INFO] [stderr] 51 | pub fn check_infix_stmt<T: Literable>(stmt: &Stmt, expect_left: T, expect_infix: Infix, expect_right: T) {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `check_let_stmt`
[INFO] [stderr]   --> src/parser/test_util.rs:59:8
[INFO] [stderr]    |
[INFO] [stderr] 59 | 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: 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] warning: function is never used: `test_int_obj`
[INFO] [stderr]   --> src/evaluator/test.rs:15:4
[INFO] [stderr]    |
[INFO] [stderr] 15 | fn test_int_obj(obj: Object, expect: i64) {
[INFO] [stderr]    |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test_bool_obj`
[INFO] [stderr]   --> src/evaluator/test.rs:23:4
[INFO] [stderr]    |
[INFO] [stderr] 23 | fn test_bool_obj(obj: Object, expect: bool) {
[INFO] [stderr]    |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `eval_infix_expr`
[INFO] [stderr]   --> src/evaluator/mod.rs:45:4
[INFO] [stderr]    |
[INFO] [stderr] 45 | fn eval_infix_expr(operator: Infix, left: Object, right: Object) -> Object {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `eval_int_infix_expr`
[INFO] [stderr]   --> src/evaluator/mod.rs:57:4
[INFO] [stderr]    |
[INFO] [stderr] 57 | fn eval_int_infix_expr(operator: Infix, left: i64, right: i64) -> Object {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `never_type` has been stable since 1.41.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(never_type)]
[INFO] [stderr]   |            ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(stable_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `check_let_stmt`
[INFO] [stderr]   --> src/parser/test_util.rs:59:8
[INFO] [stderr]    |
[INFO] [stderr] 59 | pub fn check_let_stmt(stmt: &Stmt, expected_name: &str) {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[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: function is never used: `eval_infix_expr`
[INFO] [stderr]   --> src/evaluator/mod.rs:45:4
[INFO] [stderr]    |
[INFO] [stderr] 45 | fn eval_infix_expr(operator: Infix, left: Object, right: Object) -> Object {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `eval_int_infix_expr`
[INFO] [stderr]   --> src/evaluator/mod.rs:57:4
[INFO] [stderr]    |
[INFO] [stderr] 57 | fn eval_int_infix_expr(operator: Infix, left: i64, right: i64) -> Object {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `never_type` has been stable since 1.41.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(never_type)]
[INFO] [stderr]   |            ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(stable_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.68s
[INFO] running `"docker" "inspect" "63e9df8f5af038ee8b54311020dc7ce283c3db4546a552a04f9a7451af1a15f5"`
[INFO] running `"docker" "rm" "-f" "63e9df8f5af038ee8b54311020dc7ce283c3db4546a552a04f9a7451af1a15f5"`
[INFO] [stdout] 63e9df8f5af038ee8b54311020dc7ce283c3db4546a552a04f9a7451af1a15f5