[INFO] cloning repository https://github.com/shantanugoel/monkey-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/shantanugoel/monkey-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshantanugoel%2Fmonkey-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshantanugoel%2Fmonkey-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 454c38cc87687f9350d09be5197f8af746b7097a
[INFO] testing shantanugoel/monkey-rs against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshantanugoel%2Fmonkey-rs" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/shantanugoel/monkey-rs on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/shantanugoel/monkey-rs
[INFO] finished tweaking git repo https://github.com/shantanugoel/monkey-rs
[INFO] tweaked toml for git repo https://github.com/shantanugoel/monkey-rs written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/shantanugoel/monkey-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 521c9f43d1906d77436d3ae103050ee84ed253f2d3988a7ee2c401ccc0fb9320
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "521c9f43d1906d77436d3ae103050ee84ed253f2d3988a7ee2c401ccc0fb9320", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "521c9f43d1906d77436d3ae103050ee84ed253f2d3988a7ee2c401ccc0fb9320", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "521c9f43d1906d77436d3ae103050ee84ed253f2d3988a7ee2c401ccc0fb9320", kill_on_drop: false }`
[INFO] [stdout] 521c9f43d1906d77436d3ae103050ee84ed253f2d3988a7ee2c401ccc0fb9320
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bfd2eb7cf495a6cf1d1a94fd34e7d821e2e221dc8c9925ffc533a6cef8fe2f14
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "bfd2eb7cf495a6cf1d1a94fd34e7d821e2e221dc8c9925ffc533a6cef8fe2f14", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling monkey-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `u64`
[INFO] [stdout]  --> src/lexer.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{u64, usize};
[INFO] [stdout]   |           ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self`
[INFO] [stdout]  --> src/lexer.rs:3:20
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::token::{self, TokenType};
[INFO] [stdout]   |                    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Lexer`
[INFO] [stdout]  --> src/lexer.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Lexer {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/lexer.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub fn new(input: String) -> Lexer {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `read_char`
[INFO] [stdout]   --> src/lexer.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 22 |     fn read_char(&mut self) {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `next_token`
[INFO] [stdout]   --> src/lexer.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 32 |     fn next_token(&mut self) -> TokenType {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `u64`
[INFO] [stdout]  --> src/lexer.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{u64, usize};
[INFO] [stdout]   |           ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self`
[INFO] [stdout]  --> src/lexer.rs:3:20
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::token::{self, TokenType};
[INFO] [stdout]   |                    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Lexer`
[INFO] [stdout]  --> src/lexer.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Lexer {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/lexer.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub fn new(input: String) -> Lexer {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `read_char`
[INFO] [stdout]   --> src/lexer.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 22 |     fn read_char(&mut self) {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `next_token`
[INFO] [stdout]   --> src/lexer.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 32 |     fn next_token(&mut self) -> TokenType {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.56s
[INFO] running `Command { std: "docker" "inspect" "bfd2eb7cf495a6cf1d1a94fd34e7d821e2e221dc8c9925ffc533a6cef8fe2f14", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bfd2eb7cf495a6cf1d1a94fd34e7d821e2e221dc8c9925ffc533a6cef8fe2f14", kill_on_drop: false }`
[INFO] [stdout] bfd2eb7cf495a6cf1d1a94fd34e7d821e2e221dc8c9925ffc533a6cef8fe2f14
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 857476fa26ef6f26cf5e14e61995315f75db057268a2023ebf20366c9724af27
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "857476fa26ef6f26cf5e14e61995315f75db057268a2023ebf20366c9724af27", kill_on_drop: false }`
[INFO] [stdout] warning: unused import: `u64`
[INFO] [stdout]  --> src/lexer.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{u64, usize};
[INFO] [stdout]   |           ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling monkey-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `self`
[INFO] [stdout]  --> src/lexer.rs:3:20
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::token::{self, TokenType};
[INFO] [stdout]   |                    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Lexer`
[INFO] [stdout]  --> src/lexer.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Lexer {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/lexer.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub fn new(input: String) -> Lexer {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `read_char`
[INFO] [stdout]   --> src/lexer.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 22 |     fn read_char(&mut self) {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `next_token`
[INFO] [stdout]   --> src/lexer.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 32 |     fn next_token(&mut self) -> TokenType {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `u64`
[INFO] [stdout]  --> src/lexer.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{u64, usize};
[INFO] [stdout]   |           ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self`
[INFO] [stdout]  --> src/lexer.rs:3:20
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::token::{self, TokenType};
[INFO] [stdout]   |                    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `u64`
[INFO] [stdout]  --> src/lexer.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{u64, usize};
[INFO] [stdout]   |           ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self`
[INFO] [stdout]  --> src/lexer.rs:3:20
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::token::{self, TokenType};
[INFO] [stdout]   |                    ^^^^
[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] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.68s
[INFO] running `Command { std: "docker" "inspect" "857476fa26ef6f26cf5e14e61995315f75db057268a2023ebf20366c9724af27", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "857476fa26ef6f26cf5e14e61995315f75db057268a2023ebf20366c9724af27", kill_on_drop: false }`
[INFO] [stdout] 857476fa26ef6f26cf5e14e61995315f75db057268a2023ebf20366c9724af27
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 567aebf13ec7c4ac9726ecfded0e83568bf1da122720a10cd549490c55ed0581
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "567aebf13ec7c4ac9726ecfded0e83568bf1da122720a10cd549490c55ed0581", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr] warning: unused import: `u64`
[INFO] [stdout] running 1 test
[INFO] [stderr]  --> src/lexer.rs:1:11
[INFO] [stdout] test lexer::next_token_test ... ok
[INFO] [stderr]   |
[INFO] [stdout] 
[INFO] [stderr] 1 | use std::{u64, usize};
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr]   |           ^^^
[INFO] [stdout] 
[INFO] [stderr]   |
[INFO] [stdout] 
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] running 1 test
[INFO] [stderr] 
[INFO] [stdout] test lexer::next_token_test ... ok
[INFO] [stderr] warning: unused import: `self`
[INFO] [stdout] 
[INFO] [stderr]  --> src/lexer.rs:3:20
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr]   |
[INFO] [stdout] 
[INFO] [stderr] 3 | use crate::token::{self, TokenType};
[INFO] [stderr]   |                    ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Lexer`
[INFO] [stderr]  --> src/lexer.rs:5:8
[INFO] [stderr]   |
[INFO] [stderr] 5 | struct Lexer {
[INFO] [stderr]   |        ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/lexer.rs:13:12
[INFO] [stderr]    |
[INFO] [stderr] 13 |     pub fn new(input: String) -> Lexer {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `read_char`
[INFO] [stderr]   --> src/lexer.rs:22:8
[INFO] [stderr]    |
[INFO] [stderr] 22 |     fn read_char(&mut self) {
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `next_token`
[INFO] [stderr]   --> src/lexer.rs:32:8
[INFO] [stderr]    |
[INFO] [stderr] 32 |     fn next_token(&mut self) -> TokenType {
[INFO] [stderr]    |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `monkey-rs` (lib) generated 6 warnings
[INFO] [stderr] warning: `monkey-rs` (lib test) generated 2 warnings (2 duplicates)
[INFO] [stderr] warning: `monkey-rs` (bin "monkey-rs" test) generated 2 warnings (2 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/monkey_rs-ca1601b093e1992c)
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/monkey_rs-0bb3d0a4db01f868)
[INFO] [stderr]    Doc-tests monkey-rs
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "567aebf13ec7c4ac9726ecfded0e83568bf1da122720a10cd549490c55ed0581", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "567aebf13ec7c4ac9726ecfded0e83568bf1da122720a10cd549490c55ed0581", kill_on_drop: false }`
[INFO] [stdout] 567aebf13ec7c4ac9726ecfded0e83568bf1da122720a10cd549490c55ed0581