[INFO] cloning repository https://github.com/houtenjack/monkey-interpreter
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/houtenjack/monkey-interpreter" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhoutenjack%2Fmonkey-interpreter", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhoutenjack%2Fmonkey-interpreter'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] dcfbad1dd606e56617518ab3aca623b0fe832563
[INFO] testing houtenjack/monkey-interpreter against master#733b47ea4b1b86216f14ef56e49440c33933f230+rustflags=-Copt-level=3 for pr-138759
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhoutenjack%2Fmonkey-interpreter" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/houtenjack/monkey-interpreter
[INFO] finished tweaking git repo https://github.com/houtenjack/monkey-interpreter
[INFO] tweaked toml for git repo https://github.com/houtenjack/monkey-interpreter written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/houtenjack/monkey-interpreter on toolchain 733b47ea4b1b86216f14ef56e49440c33933f230
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/houtenjack/monkey-interpreter 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" "+733b47ea4b1b86216f14ef56e49440c33933f230" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b7407aa5dc05a79b5920e265b86586131ca615c875c7c20afa9d4e1af1bf1b3a
[INFO] running `Command { std: "docker" "start" "-a" "b7407aa5dc05a79b5920e265b86586131ca615c875c7c20afa9d4e1af1bf1b3a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b7407aa5dc05a79b5920e265b86586131ca615c875c7c20afa9d4e1af1bf1b3a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b7407aa5dc05a79b5920e265b86586131ca615c875c7c20afa9d4e1af1bf1b3a", kill_on_drop: false }`
[INFO] [stdout] b7407aa5dc05a79b5920e265b86586131ca615c875c7c20afa9d4e1af1bf1b3a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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 -Copt-level=3" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7aaf75ba18da724b8f318ba151a59067382da6e931b7a34b842436fe4926c3bd
[INFO] running `Command { std: "docker" "start" "-a" "7aaf75ba18da724b8f318ba151a59067382da6e931b7a34b842436fe4926c3bd", kill_on_drop: false }`
[INFO] [stderr]    Compiling monkey v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `Lexer` is never constructed
[INFO] [stdout]  --> src/lexer2.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | struct Lexer<'a> {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `next_token` are never used
[INFO] [stdout]   --> src/lexer2.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 14 | impl<'a> Lexer<'a> {
[INFO] [stdout]    | ------------------ associated items in this implementation
[INFO] [stdout] 15 |     pub fn new(input: &str) -> Lexer {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 22 |     pub fn next_token(&self) -> (Lexer, Option<Token>) {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/lexer2.rs:15:23
[INFO] [stdout]    |
[INFO] [stdout] 15 |     pub fn new(input: &str) -> Lexer {
[INFO] [stdout]    |                       ^^^^     ----- the lifetime gets resolved as `'_`
[INFO] [stdout]    |                       |
[INFO] [stdout]    |                       this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 15 |     pub fn new(input: &str) -> Lexer<'_> {
[INFO] [stdout]    |                                     ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/lexer2.rs:22:23
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn next_token(&self) -> (Lexer, Option<Token>) {
[INFO] [stdout]    |                       ^^^^^      ----- the lifetime gets resolved as `'_`
[INFO] [stdout]    |                       |
[INFO] [stdout]    |                       this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn next_token(&self) -> (Lexer<'_>, Option<Token>) {
[INFO] [stdout]    |                                       ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/parser.rs:10:23
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn new(lexer: &mut Lexer) -> Parser {
[INFO] [stdout]    |                       ^^^^^^^^^^     ------ the lifetime gets resolved as `'_`
[INFO] [stdout]    |                       |
[INFO] [stdout]    |                       this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn new(lexer: &mut Lexer) -> Parser<'_> {
[INFO] [stdout]    |                                            ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.84s
[INFO] running `Command { std: "docker" "inspect" "7aaf75ba18da724b8f318ba151a59067382da6e931b7a34b842436fe4926c3bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7aaf75ba18da724b8f318ba151a59067382da6e931b7a34b842436fe4926c3bd", kill_on_drop: false }`
[INFO] [stdout] 7aaf75ba18da724b8f318ba151a59067382da6e931b7a34b842436fe4926c3bd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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 -Copt-level=3" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8765d3ae7e9ac2c030323d8bafe2435804f41027b99bc2cac3809c5becd4764a
[INFO] running `Command { std: "docker" "start" "-a" "8765d3ae7e9ac2c030323d8bafe2435804f41027b99bc2cac3809c5becd4764a", kill_on_drop: false }`
[INFO] [stdout] warning: struct `Lexer` is never constructed
[INFO] [stdout]  --> src/lexer2.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | struct Lexer<'a> {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling monkey v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated items `new` and `next_token` are never used
[INFO] [stdout]   --> src/lexer2.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 14 | impl<'a> Lexer<'a> {
[INFO] [stdout]    | ------------------ associated items in this implementation
[INFO] [stdout] 15 |     pub fn new(input: &str) -> Lexer {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 22 |     pub fn next_token(&self) -> (Lexer, Option<Token>) {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/lexer2.rs:15:23
[INFO] [stdout]    |
[INFO] [stdout] 15 |     pub fn new(input: &str) -> Lexer {
[INFO] [stdout]    |                       ^^^^     ----- the lifetime gets resolved as `'_`
[INFO] [stdout]    |                       |
[INFO] [stdout]    |                       this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 15 |     pub fn new(input: &str) -> Lexer<'_> {
[INFO] [stdout]    |                                     ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/lexer2.rs:22:23
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn next_token(&self) -> (Lexer, Option<Token>) {
[INFO] [stdout]    |                       ^^^^^      ----- the lifetime gets resolved as `'_`
[INFO] [stdout]    |                       |
[INFO] [stdout]    |                       this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn next_token(&self) -> (Lexer<'_>, Option<Token>) {
[INFO] [stdout]    |                                       ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/parser.rs:10:23
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn new(lexer: &mut Lexer) -> Parser {
[INFO] [stdout]    |                       ^^^^^^^^^^     ------ the lifetime gets resolved as `'_`
[INFO] [stdout]    |                       |
[INFO] [stdout]    |                       this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn new(lexer: &mut Lexer) -> Parser<'_> {
[INFO] [stdout]    |                                            ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `position` and `ch` are never read
[INFO] [stdout]   --> src/lexer2.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 9  | struct Lexer<'a> {
[INFO] [stdout]    |        ----- fields in this struct
[INFO] [stdout] 10 |     input: &'a str,
[INFO] [stdout] 11 |     position: usize,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 12 |     ch: Option<char>,
[INFO] [stdout]    |     ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/lexer2.rs:15:23
[INFO] [stdout]    |
[INFO] [stdout] 15 |     pub fn new(input: &str) -> Lexer {
[INFO] [stdout]    |                       ^^^^     ----- the lifetime gets resolved as `'_`
[INFO] [stdout]    |                       |
[INFO] [stdout]    |                       this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 15 |     pub fn new(input: &str) -> Lexer<'_> {
[INFO] [stdout]    |                                     ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/lexer2.rs:22:23
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn next_token(&self) -> (Lexer, Option<Token>) {
[INFO] [stdout]    |                       ^^^^^      ----- the lifetime gets resolved as `'_`
[INFO] [stdout]    |                       |
[INFO] [stdout]    |                       this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn next_token(&self) -> (Lexer<'_>, Option<Token>) {
[INFO] [stdout]    |                                       ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/parser.rs:10:23
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn new(lexer: &mut Lexer) -> Parser {
[INFO] [stdout]    |                       ^^^^^^^^^^     ------ the lifetime gets resolved as `'_`
[INFO] [stdout]    |                       |
[INFO] [stdout]    |                       this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn new(lexer: &mut Lexer) -> Parser<'_> {
[INFO] [stdout]    |                                            ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.97s
[INFO] running `Command { std: "docker" "inspect" "8765d3ae7e9ac2c030323d8bafe2435804f41027b99bc2cac3809c5becd4764a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8765d3ae7e9ac2c030323d8bafe2435804f41027b99bc2cac3809c5becd4764a", kill_on_drop: false }`
[INFO] [stdout] 8765d3ae7e9ac2c030323d8bafe2435804f41027b99bc2cac3809c5becd4764a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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 -Copt-level=3" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] ddc65fc38667d0d90eb2d0631a8fc2d2b1345259c461efdec958db748764e12b
[INFO] running `Command { std: "docker" "start" "-a" "ddc65fc38667d0d90eb2d0631a8fc2d2b1345259c461efdec958db748764e12b", kill_on_drop: false }`
[INFO] [stderr] warning: struct `Lexer` is never constructed
[INFO] [stderr]  --> src/lexer2.rs:9:8
[INFO] [stderr]   |
[INFO] [stderr] 9 | struct Lexer<'a> {
[INFO] [stderr]   |        ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new` and `next_token` are never used
[INFO] [stderr]   --> src/lexer2.rs:15:12
[INFO] [stderr]    |
[INFO] [stderr] 14 | impl<'a> Lexer<'a> {
[INFO] [stderr]    | ------------------ associated items in this implementation
[INFO] [stderr] 15 |     pub fn new(input: &str) -> Lexer {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] ...
[INFO] [stderr] 22 |     pub fn next_token(&self) -> (Lexer, Option<Token>) {
[INFO] [stderr]    |            ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stderr]   --> src/lexer2.rs:15:23
[INFO] [stderr]    |
[INFO] [stderr] 15 |     pub fn new(input: &str) -> Lexer {
[INFO] [stderr]    |                       ^^^^     ----- the lifetime gets resolved as `'_`
[INFO] [stderr]    |                       |
[INFO] [stderr]    |                       this lifetime flows to the output
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stderr] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stderr]    |
[INFO] [stderr] 15 |     pub fn new(input: &str) -> Lexer<'_> {
[INFO] [stderr]    |                                     ++++
[INFO] [stderr] 
[INFO] [stderr] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stderr]   --> src/lexer2.rs:22:23
[INFO] [stderr]    |
[INFO] [stderr] 22 |     pub fn next_token(&self) -> (Lexer, Option<Token>) {
[INFO] [stderr]    |                       ^^^^^      ----- the lifetime gets resolved as `'_`
[INFO] [stderr]    |                       |
[INFO] [stderr]    |                       this lifetime flows to the output
[INFO] [stderr]    |
[INFO] [stderr] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stderr]    |
[INFO] [stderr] 22 |     pub fn next_token(&self) -> (Lexer<'_>, Option<Token>) {
[INFO] [stderr]    |                                       ++++
[INFO] [stderr] 
[INFO] [stderr] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stderr]   --> src/parser.rs:10:23
[INFO] [stderr]    |
[INFO] [stderr] 10 |     pub fn new(lexer: &mut Lexer) -> Parser {
[INFO] [stderr]    |                       ^^^^^^^^^^     ------ the lifetime gets resolved as `'_`
[INFO] [stderr]    |                       |
[INFO] [stderr]    |                       this lifetime flows to the output
[INFO] [stderr]    |
[INFO] [stderr] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stderr]    |
[INFO] [stderr] 10 |     pub fn new(lexer: &mut Lexer) -> Parser<'_> {
[INFO] [stderr]    |                                            ++++
[INFO] [stderr] 
[INFO] [stderr] warning: `monkey` (lib) generated 5 warnings
[INFO] [stderr] warning: fields `position` and `ch` are never read
[INFO] [stderr]   --> src/lexer2.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 9  | struct Lexer<'a> {
[INFO] [stderr]    |        ----- fields in this struct
[INFO] [stderr] 10 |     input: &'a str,
[INFO] [stderr] 11 |     position: usize,
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr] 12 |     ch: Option<char>,
[INFO] [stderr]    |     ^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `monkey` (lib test) generated 4 warnings (3 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/monkey-a3cf2782617ecd7c)
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test lexer::tests::it_works ... ok
[INFO] [stdout] test lexer::tests::it_works_2 ... ok
[INFO] [stdout] test lexer2::tests::it_works ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- lexer2::tests::it_works stdout ----
[INFO] [stdout] 
[INFO] [stdout] thread 'lexer2::tests::it_works' panicked at src/lexer2.rs:49:13:
[INFO] [stdout] assertion `left == right` failed
[INFO] [stdout]   left: Some(Assign)
[INFO] [stdout]  right: None
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x5ae7e4bc8a62 - std::backtrace_rs::backtrace::libunwind::trace::h73a647620bf1c49d
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stdout]    1:     0x5ae7e4bc8a62 - std::backtrace_rs::backtrace::trace_unsynchronized::hd4d513ed96cb3cb1
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stdout]    2:     0x5ae7e4bc8a62 - std::sys::backtrace::_print_fmt::h61bb95f7476aafa5
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/sys/backtrace.rs:66:9
[INFO] [stdout]    3:     0x5ae7e4bc8a62 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::ha2e7e3a01df69042
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/sys/backtrace.rs:39:26
[INFO] [stdout]    4:     0x5ae7e4bedb23 - core::fmt::rt::Argument::fmt::hf14163372f0f9a76
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/core/src/fmt/rt.rs:173:76
[INFO] [stdout]    5:     0x5ae7e4bedb23 - core::fmt::write::h7cb8f63788cd01d2
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/core/src/fmt/mod.rs:1465:25
[INFO] [stdout]    6:     0x5ae7e4bc59f3 - std::io::default_write_fmt::h9ed739ccee8a150c
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/io/mod.rs:639:11
[INFO] [stdout]    7:     0x5ae7e4bc59f3 - std::io::Write::write_fmt::h1c0a32da913b32f1
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/io/mod.rs:1954:13
[INFO] [stdout]    8:     0x5ae7e4bc88b2 - std::sys::backtrace::BacktraceLock::print::h3ec4d7883eb25e61
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/sys/backtrace.rs:42:9
[INFO] [stdout]    9:     0x5ae7e4bc9fcc - std::panicking::default_hook::{{closure}}::h29548987efd832cb
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/panicking.rs:300:27
[INFO] [stdout]   10:     0x5ae7e4bc9e22 - std::panicking::default_hook::ha25170a15c643514
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/panicking.rs:324:9
[INFO] [stdout]   11:     0x5ae7e4b91f44 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h562adeecbf43c420
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/alloc/src/boxed.rs:1985:9
[INFO] [stdout]   12:     0x5ae7e4b91f44 - test::test_main_with_exit_callback::{{closure}}::h97dd2a879d27e0e4
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/test/src/lib.rs:145:21
[INFO] [stdout]   13:     0x5ae7e4bca9ab - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h7e85cbdbda26fdb7
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/alloc/src/boxed.rs:1985:9
[INFO] [stdout]   14:     0x5ae7e4bca9ab - std::panicking::rust_panic_with_hook::h0d81afcd829aa24b
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/panicking.rs:841:13
[INFO] [stdout]   15:     0x5ae7e4bca77a - std::panicking::begin_panic_handler::{{closure}}::hc84a33f1202346cf
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/panicking.rs:706:13
[INFO] [stdout]   16:     0x5ae7e4bc8f59 - std::sys::backtrace::__rust_end_short_backtrace::h373067a14f6c59aa
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/sys/backtrace.rs:168:18
[INFO] [stdout]   17:     0x5ae7e4bca40d - __rustc[beb0385846a06d21]::rust_begin_unwind
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/panicking.rs:697:5
[INFO] [stdout]   18:     0x5ae7e4bec6a0 - core::panicking::panic_fmt::ha33fa2ae772efba9
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/core/src/panicking.rs:75:14
[INFO] [stdout]   19:     0x5ae7e4bec907 - core::panicking::assert_failed_inner::h6a89cd271393c011
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/core/src/panicking.rs:448:17
[INFO] [stdout]   20:     0x5ae7e4b5807e - core::panicking::assert_failed::h0a2e072de7cc8a13
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/core/src/panicking.rs:403:5
[INFO] [stdout]   21:     0x5ae7e4b588ff - monkey::lexer2::tests::it_works::{{closure}}::h6efafe8bb275d9d1
[INFO] [stdout]                                at /opt/rustwide/workdir/src/lexer2.rs:49:13
[INFO] [stdout]   22:     0x5ae7e4b58710 - <core::slice::iter::Iter<T> as core::iter::traits::iterator::Iterator>::for_each::hdd6947e9e4f951b5
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/core/src/slice/iter/macros.rs:277:21
[INFO] [stdout]   23:     0x5ae7e4b58710 - monkey::lexer2::tests::it_works::hdd6d6755782dab32
[INFO] [stdout]                                at /opt/rustwide/workdir/src/lexer2.rs:47:23
[INFO] [stdout]   24:     0x5ae7e4b57a56 - monkey::lexer2::tests::it_works::{{closure}}::h6119ec097b55a1b9
[INFO] [stdout]                                at /opt/rustwide/workdir/src/lexer2.rs:33:18
[INFO] [stdout]   25:     0x5ae7e4b57a56 - core::ops::function::FnOnce::call_once::h892ce164ca6f1066
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   26:     0x5ae7e4b9767b - core::ops::function::FnOnce::call_once::hf84b9c3d864a6959
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   27:     0x5ae7e4b9767b - test::__rust_begin_short_backtrace::h5724e31441c16fcb
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/test/src/lib.rs:648:18
[INFO] [stdout]   28:     0x5ae7e4b968be - test::run_test_in_process::{{closure}}::hbc28c9aa91793d7d
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/test/src/lib.rs:671:74
[INFO] [stdout]   29:     0x5ae7e4b968be - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hc17b0e238c0f8f3e
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   30:     0x5ae7e4b968be - std::panicking::catch_unwind::do_call::hcdbce0d6dd6c83ce
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/panicking.rs:589:40
[INFO] [stdout]   31:     0x5ae7e4b968be - std::panicking::catch_unwind::h9477967ceea044e8
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/panicking.rs:552:19
[INFO] [stdout]   32:     0x5ae7e4b968be - std::panic::catch_unwind::h616a2e249da12e16
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/panic.rs:359:14
[INFO] [stdout]   33:     0x5ae7e4b968be - test::run_test_in_process::h2758deb0f2e54430
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/test/src/lib.rs:671:27
[INFO] [stdout]   34:     0x5ae7e4b968be - test::run_test::{{closure}}::habe5cd2564b18aaa
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/test/src/lib.rs:592:43
[INFO] [stdout]   35:     0x5ae7e4b5a464 - test::run_test::{{closure}}::h9a0a6928f1a15421
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/test/src/lib.rs:622:41
[INFO] [stdout]   36:     0x5ae7e4b5a464 - std::sys::backtrace::__rust_begin_short_backtrace::hd68b5332434a22ca
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/sys/backtrace.rs:152:18
[INFO] [stdout]   37:     0x5ae7e4b5de0a - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::h264ddcc3098eacae
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/thread/mod.rs:559:17
[INFO] [stdout]   38:     0x5ae7e4b5de0a - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h9fa39489749d6f3c
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   39:     0x5ae7e4b5de0a - std::panicking::catch_unwind::do_call::hb9a1944b9f85100f
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/panicking.rs:589:40
[INFO] [stdout]   40:     0x5ae7e4b5de0a - std::panicking::catch_unwind::h0c6f100786c0dad8
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/panicking.rs:552:19
[INFO] [stdout]   41:     0x5ae7e4b5de0a - std::panic::catch_unwind::hf6084e2723385823
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/panic.rs:359:14
[INFO] [stdout]   42:     0x5ae7e4b5de0a - std::thread::Builder::spawn_unchecked_::{{closure}}::hf0af58ce658143ad
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/thread/mod.rs:557:30
[INFO] [stdout]   43:     0x5ae7e4b5de0a - core::ops::function::FnOnce::call_once{{vtable.shim}}::h88a14f9b2e79f9de
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   44:     0x5ae7e4bcd907 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hf31256ba38644b65
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/alloc/src/boxed.rs:1971:9
[INFO] [stdout]   45:     0x5ae7e4bcd907 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h100ad77f3448041b
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/alloc/src/boxed.rs:1971:9
[INFO] [stdout]   46:     0x5ae7e4bcd907 - std::sys::pal::unix::thread::Thread::new::thread_start::h1a22ded422ce395b
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/sys/pal/unix/thread.rs:97:17
[INFO] [stdout]   47:     0x720afb97baa4 - <unknown>
[INFO] [stdout]   48:     0x720afba08a34 - clone
[INFO] [stdout]   49:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     lexer2::tests::it_works
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 2 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `--lib`
[INFO] running `Command { std: "docker" "inspect" "ddc65fc38667d0d90eb2d0631a8fc2d2b1345259c461efdec958db748764e12b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ddc65fc38667d0d90eb2d0631a8fc2d2b1345259c461efdec958db748764e12b", kill_on_drop: false }`
[INFO] [stdout] ddc65fc38667d0d90eb2d0631a8fc2d2b1345259c461efdec958db748764e12b
