[INFO] cloning repository https://github.com/victorcwai/rust-lox
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/victorcwai/rust-lox" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvictorcwai%2Frust-lox", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvictorcwai%2Frust-lox'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 02e0a5ef1429dc842370d3866565693eff24473f
[INFO] testing victorcwai/rust-lox against master#c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38 for pr-146098-7
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvictorcwai%2Frust-lox" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/victorcwai/rust-lox
[INFO] finished tweaking git repo https://github.com/victorcwai/rust-lox
[INFO] tweaked toml for git repo https://github.com/victorcwai/rust-lox written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/victorcwai/rust-lox on toolchain c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/victorcwai/rust-lox 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" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 38706e29b1b74729d515967b5fffc4c3e0d577f2e20b78c2b4d282b4e3bdaabe
[INFO] running `Command { std: "docker" "start" "-a" "38706e29b1b74729d515967b5fffc4c3e0d577f2e20b78c2b4d282b4e3bdaabe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "38706e29b1b74729d515967b5fffc4c3e0d577f2e20b78c2b4d282b4e3bdaabe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "38706e29b1b74729d515967b5fffc4c3e0d577f2e20b78c2b4d282b4e3bdaabe", kill_on_drop: false }`
[INFO] [stdout] 38706e29b1b74729d515967b5fffc4c3e0d577f2e20b78c2b4d282b4e3bdaabe
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cb84eaa6c964ba8ff9b5123e45354504c924d2c77d868bfca4ecfeb39ae6d3c8
[INFO] running `Command { std: "docker" "start" "-a" "cb84eaa6c964ba8ff9b5123e45354504c924d2c77d868bfca4ecfeb39ae6d3c8", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-lox v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `can_assign`
[INFO] [stdout]    --> src/compiler.rs:471:31
[INFO] [stdout]     |
[INFO] [stdout] 471 |     fn rule_binary(&mut self, can_assign: bool) {
[INFO] [stdout]     |                               ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_can_assign`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `can_assign`
[INFO] [stdout]    --> src/compiler.rs:491:29
[INFO] [stdout]     |
[INFO] [stdout] 491 |     fn rule_call(&mut self, can_assign: bool) {
[INFO] [stdout]     |                             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_can_assign`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `can_assign`
[INFO] [stdout]    --> src/compiler.rs:496:32
[INFO] [stdout]     |
[INFO] [stdout] 496 |     fn rule_literal(&mut self, can_assign: bool) {
[INFO] [stdout]     |                                ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_can_assign`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `can_assign`
[INFO] [stdout]    --> src/compiler.rs:505:33
[INFO] [stdout]     |
[INFO] [stdout] 505 |     fn rule_grouping(&mut self, can_assign: bool) {
[INFO] [stdout]     |                                 ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_can_assign`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `can_assign`
[INFO] [stdout]    --> src/compiler.rs:511:31
[INFO] [stdout]     |
[INFO] [stdout] 511 |     fn rule_number(&mut self, can_assign: bool) {
[INFO] [stdout]     |                               ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_can_assign`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `can_assign`
[INFO] [stdout]    --> src/compiler.rs:520:27
[INFO] [stdout]     |
[INFO] [stdout] 520 |     fn rule_or(&mut self, can_assign: bool) {
[INFO] [stdout]     |                           ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_can_assign`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `can_assign`
[INFO] [stdout]    --> src/compiler.rs:533:31
[INFO] [stdout]     |
[INFO] [stdout] 533 |     fn rule_string(&mut self, can_assign: bool) {
[INFO] [stdout]     |                               ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_can_assign`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `can_assign`
[INFO] [stdout]    --> src/compiler.rs:566:30
[INFO] [stdout]     |
[INFO] [stdout] 566 |     fn rule_unary(&mut self, can_assign: bool) {
[INFO] [stdout]     |                              ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_can_assign`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `can_assign`
[INFO] [stdout]    --> src/compiler.rs:734:28
[INFO] [stdout]     |
[INFO] [stdout] 734 |     fn rule_and(&mut self, can_assign: bool) {
[INFO] [stdout]     |                            ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_can_assign`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Ok` is never constructed
[INFO] [stdout]   --> src/vm.rs:41:5
[INFO] [stdout]    |
[INFO] [stdout] 40 | pub enum InterpretResult {
[INFO] [stdout]    |          --------------- variant in this enum
[INFO] [stdout] 41 |     Ok,
[INFO] [stdout]    |     ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `InterpretResult` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:51:17
[INFO] [stdout]    |
[INFO] [stdout] 51 |                 vm.interpret(&buffer);
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 51 |                 let _ = vm.interpret(&buffer);
[INFO] [stdout]    |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison is useless due to type limits
[INFO] [stdout]    --> src/compiler.rs:780:20
[INFO] [stdout]     |
[INFO] [stdout] 780 |                 if self.compiler.function.arity > 255 {
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_comparisons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]  --> src/scanner.rs:8:24
[INFO] [stdout]   |
[INFO] [stdout] 8 |     pub fn new(source: &str) -> Scanner {
[INFO] [stdout]   |                        ^^^^     ^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]   |                        |
[INFO] [stdout]   |                        the lifetime is elided here
[INFO] [stdout]   |
[INFO] [stdout]   = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]   = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]   |
[INFO] [stdout] 8 |     pub fn new(source: &str) -> Scanner<'_> {
[INFO] [stdout]   |                                        ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/vm.rs:269:13
[INFO] [stdout]     |
[INFO] [stdout] 269 |             self.runtime_error(&msg);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 269 |             let _ = self.runtime_error(&msg);
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/vm.rs:273:13
[INFO] [stdout]     |
[INFO] [stdout] 273 |             self.runtime_error("Stack overflow.");
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 273 |             let _ = self.runtime_error("Stack overflow.");
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/vm.rs:285:17
[INFO] [stdout]     |
[INFO] [stdout] 285 |                 self.runtime_error("Can only call functions and classes.");
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 285 |                 let _ = self.runtime_error("Can only call functions and classes.");
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.57s
[INFO] running `Command { std: "docker" "inspect" "cb84eaa6c964ba8ff9b5123e45354504c924d2c77d868bfca4ecfeb39ae6d3c8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cb84eaa6c964ba8ff9b5123e45354504c924d2c77d868bfca4ecfeb39ae6d3c8", kill_on_drop: false }`
[INFO] [stdout] cb84eaa6c964ba8ff9b5123e45354504c924d2c77d868bfca4ecfeb39ae6d3c8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d5767cda46eefd9b8e3d327e1a8322b5e58aa5bf4d829ffa6811a944f1573998
[INFO] running `Command { std: "docker" "start" "-a" "d5767cda46eefd9b8e3d327e1a8322b5e58aa5bf4d829ffa6811a944f1573998", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-lox v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::convert::TryInto`
[INFO] [stdout]   --> src/main.rs:72:9
[INFO] [stdout]    |
[INFO] [stdout] 72 |     use std::convert::TryInto;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Chunk` and `OpCode`
[INFO] [stdout]   --> src/main.rs:74:24
[INFO] [stdout]    |
[INFO] [stdout] 74 |     use crate::chunk::{Chunk, OpCode};
[INFO] [stdout]    |                        ^^^^^  ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::debug::disassemble_chunk`
[INFO] [stdout]   --> src/main.rs:75:9
[INFO] [stdout]    |
[INFO] [stdout] 75 |     use crate::debug::disassemble_chunk;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::interner::Interner`
[INFO] [stdout]   --> src/main.rs:76:9
[INFO] [stdout]    |
[INFO] [stdout] 76 |     use crate::interner::Interner;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::value`
[INFO] [stdout]   --> src/main.rs:77:9
[INFO] [stdout]    |
[INFO] [stdout] 77 |     use crate::value;
[INFO] [stdout]    |         ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `can_assign`
[INFO] [stdout]    --> src/compiler.rs:471:31
[INFO] [stdout]     |
[INFO] [stdout] 471 |     fn rule_binary(&mut self, can_assign: bool) {
[INFO] [stdout]     |                               ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_can_assign`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `can_assign`
[INFO] [stdout]    --> src/compiler.rs:491:29
[INFO] [stdout]     |
[INFO] [stdout] 491 |     fn rule_call(&mut self, can_assign: bool) {
[INFO] [stdout]     |                             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_can_assign`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `can_assign`
[INFO] [stdout]    --> src/compiler.rs:496:32
[INFO] [stdout]     |
[INFO] [stdout] 496 |     fn rule_literal(&mut self, can_assign: bool) {
[INFO] [stdout]     |                                ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_can_assign`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `can_assign`
[INFO] [stdout]    --> src/compiler.rs:505:33
[INFO] [stdout]     |
[INFO] [stdout] 505 |     fn rule_grouping(&mut self, can_assign: bool) {
[INFO] [stdout]     |                                 ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_can_assign`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `can_assign`
[INFO] [stdout]    --> src/compiler.rs:511:31
[INFO] [stdout]     |
[INFO] [stdout] 511 |     fn rule_number(&mut self, can_assign: bool) {
[INFO] [stdout]     |                               ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_can_assign`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `can_assign`
[INFO] [stdout]    --> src/compiler.rs:520:27
[INFO] [stdout]     |
[INFO] [stdout] 520 |     fn rule_or(&mut self, can_assign: bool) {
[INFO] [stdout]     |                           ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_can_assign`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `can_assign`
[INFO] [stdout]    --> src/compiler.rs:533:31
[INFO] [stdout]     |
[INFO] [stdout] 533 |     fn rule_string(&mut self, can_assign: bool) {
[INFO] [stdout]     |                               ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_can_assign`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `can_assign`
[INFO] [stdout]    --> src/compiler.rs:566:30
[INFO] [stdout]     |
[INFO] [stdout] 566 |     fn rule_unary(&mut self, can_assign: bool) {
[INFO] [stdout]     |                              ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_can_assign`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `can_assign`
[INFO] [stdout]    --> src/compiler.rs:734:28
[INFO] [stdout]     |
[INFO] [stdout] 734 |     fn rule_and(&mut self, can_assign: bool) {
[INFO] [stdout]     |                            ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_can_assign`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Ok` is never constructed
[INFO] [stdout]   --> src/vm.rs:41:5
[INFO] [stdout]    |
[INFO] [stdout] 40 | pub enum InterpretResult {
[INFO] [stdout]    |          --------------- variant in this enum
[INFO] [stdout] 41 |     Ok,
[INFO] [stdout]    |     ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `InterpretResult` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:51:17
[INFO] [stdout]    |
[INFO] [stdout] 51 |                 vm.interpret(&buffer);
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 51 |                 let _ = vm.interpret(&buffer);
[INFO] [stdout]    |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison is useless due to type limits
[INFO] [stdout]    --> src/compiler.rs:780:20
[INFO] [stdout]     |
[INFO] [stdout] 780 |                 if self.compiler.function.arity > 255 {
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_comparisons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]  --> src/scanner.rs:8:24
[INFO] [stdout]   |
[INFO] [stdout] 8 |     pub fn new(source: &str) -> Scanner {
[INFO] [stdout]   |                        ^^^^     ^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]   |                        |
[INFO] [stdout]   |                        the lifetime is elided here
[INFO] [stdout]   |
[INFO] [stdout]   = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]   = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]   |
[INFO] [stdout] 8 |     pub fn new(source: &str) -> Scanner<'_> {
[INFO] [stdout]   |                                        ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/vm.rs:269:13
[INFO] [stdout]     |
[INFO] [stdout] 269 |             self.runtime_error(&msg);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 269 |             let _ = self.runtime_error(&msg);
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/vm.rs:273:13
[INFO] [stdout]     |
[INFO] [stdout] 273 |             self.runtime_error("Stack overflow.");
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 273 |             let _ = self.runtime_error("Stack overflow.");
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/vm.rs:285:17
[INFO] [stdout]     |
[INFO] [stdout] 285 |                 self.runtime_error("Can only call functions and classes.");
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 285 |                 let _ = self.runtime_error("Can only call functions and classes.");
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.83s
[INFO] running `Command { std: "docker" "inspect" "d5767cda46eefd9b8e3d327e1a8322b5e58aa5bf4d829ffa6811a944f1573998", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d5767cda46eefd9b8e3d327e1a8322b5e58aa5bf4d829ffa6811a944f1573998", kill_on_drop: false }`
[INFO] [stdout] d5767cda46eefd9b8e3d327e1a8322b5e58aa5bf4d829ffa6811a944f1573998
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 63c8e70e3400848de2644204e7978a1aadb0992424e9eb61a4749fcd2db28d64
[INFO] running `Command { std: "docker" "start" "-a" "63c8e70e3400848de2644204e7978a1aadb0992424e9eb61a4749fcd2db28d64", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `std::convert::TryInto`
[INFO] [stderr]   --> src/main.rs:72:9
[INFO] [stderr]    |
[INFO] [stderr] 72 |     use std::convert::TryInto;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Chunk` and `OpCode`
[INFO] [stderr]   --> src/main.rs:74:24
[INFO] [stderr]    |
[INFO] [stderr] 74 |     use crate::chunk::{Chunk, OpCode};
[INFO] [stderr]    |                        ^^^^^  ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::debug::disassemble_chunk`
[INFO] [stderr]   --> src/main.rs:75:9
[INFO] [stderr]    |
[INFO] [stderr] 75 |     use crate::debug::disassemble_chunk;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::interner::Interner`
[INFO] [stderr]   --> src/main.rs:76:9
[INFO] [stderr]    |
[INFO] [stderr] 76 |     use crate::interner::Interner;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::value`
[INFO] [stderr]   --> src/main.rs:77:9
[INFO] [stderr]    |
[INFO] [stderr] 77 |     use crate::value;
[INFO] [stderr]    |         ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `can_assign`
[INFO] [stderr]    --> src/compiler.rs:471:31
[INFO] [stderr]     |
[INFO] [stderr] 471 |     fn rule_binary(&mut self, can_assign: bool) {
[INFO] [stderr]     |                               ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_can_assign`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `can_assign`
[INFO] [stderr]    --> src/compiler.rs:491:29
[INFO] [stderr]     |
[INFO] [stderr] 491 |     fn rule_call(&mut self, can_assign: bool) {
[INFO] [stderr]     |                             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_can_assign`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `can_assign`
[INFO] [stderr]    --> src/compiler.rs:496:32
[INFO] [stderr]     |
[INFO] [stderr] 496 |     fn rule_literal(&mut self, can_assign: bool) {
[INFO] [stderr]     |                                ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_can_assign`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `can_assign`
[INFO] [stderr]    --> src/compiler.rs:505:33
[INFO] [stderr]     |
[INFO] [stderr] 505 |     fn rule_grouping(&mut self, can_assign: bool) {
[INFO] [stderr]     |                                 ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_can_assign`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `can_assign`
[INFO] [stderr]    --> src/compiler.rs:511:31
[INFO] [stderr]     |
[INFO] [stderr] 511 |     fn rule_number(&mut self, can_assign: bool) {
[INFO] [stderr]     |                               ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_can_assign`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `can_assign`
[INFO] [stderr]    --> src/compiler.rs:520:27
[INFO] [stderr]     |
[INFO] [stderr] 520 |     fn rule_or(&mut self, can_assign: bool) {
[INFO] [stderr]     |                           ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_can_assign`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `can_assign`
[INFO] [stderr]    --> src/compiler.rs:533:31
[INFO] [stderr]     |
[INFO] [stderr] 533 |     fn rule_string(&mut self, can_assign: bool) {
[INFO] [stderr]     |                               ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_can_assign`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `can_assign`
[INFO] [stderr]    --> src/compiler.rs:566:30
[INFO] [stderr]     |
[INFO] [stderr] 566 |     fn rule_unary(&mut self, can_assign: bool) {
[INFO] [stderr]     |                              ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_can_assign`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `can_assign`
[INFO] [stderr]    --> src/compiler.rs:734:28
[INFO] [stderr]     |
[INFO] [stderr] 734 |     fn rule_and(&mut self, can_assign: bool) {
[INFO] [stderr]     |                            ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_can_assign`
[INFO] [stderr] 
[INFO] [stderr] warning: variant `Ok` is never constructed
[INFO] [stderr]   --> src/vm.rs:41:5
[INFO] [stderr]    |
[INFO] [stderr] 40 | pub enum InterpretResult {
[INFO] [stderr]    |          --------------- variant in this enum
[INFO] [stderr] 41 |     Ok,
[INFO] [stderr]    |     ^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `InterpretResult` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/main.rs:51:17
[INFO] [stderr]    |
[INFO] [stderr] 51 |                 vm.interpret(&buffer);
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 51 |                 let _ = vm.interpret(&buffer);
[INFO] [stderr]    |                 +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: comparison is useless due to type limits
[INFO] [stderr]    --> src/compiler.rs:780:20
[INFO] [stderr]     |
[INFO] [stderr] 780 |                 if self.compiler.function.arity > 255 {
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_comparisons)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]  --> src/scanner.rs:8:24
[INFO] [stderr]   |
[INFO] [stderr] 8 |     pub fn new(source: &str) -> Scanner {
[INFO] [stderr]   |                        ^^^^     ^^^^^^^ the same lifetime is hidden here
[INFO] [stderr]   |                        |
[INFO] [stderr]   |                        the lifetime is elided here
[INFO] [stderr]   |
[INFO] [stderr]   = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr]   = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]   |
[INFO] [stderr] 8 |     pub fn new(source: &str) -> Scanner<'_> {
[INFO] [stderr]   |                                        ++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/vm.rs:269:13
[INFO] [stderr]     |
[INFO] [stderr] 269 |             self.runtime_error(&msg);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 269 |             let _ = self.runtime_error(&msg);
[INFO] [stderr]     |             +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/vm.rs:273:13
[INFO] [stderr]     |
[INFO] [stderr] 273 |             self.runtime_error("Stack overflow.");
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 273 |             let _ = self.runtime_error("Stack overflow.");
[INFO] [stderr]     |             +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/vm.rs:285:17
[INFO] [stderr]     |
[INFO] [stderr] 285 |                 self.runtime_error("Can only call functions and classes.");
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 285 |                 let _ = self.runtime_error("Can only call functions and classes.");
[INFO] [stderr]     |                 +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `rust-lox` (bin "rust-lox" test) generated 21 warnings (run `cargo fix --bin "rust-lox" -p rust-lox --tests` to apply 15 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.20s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/rust_lox-476cb2daee0c61ac)
[INFO] [stdout] 
[INFO] [stdout] running 8 tests
[INFO] [stdout] test tests::ch24_calls ... ok
[INFO] [stdout] test tests::ch21_global ... ok
[INFO] [stdout] test tests::ch24_calls3 ... ok
[INFO] [stdout] test tests::ch14_chunk ... ok
[INFO] [stdout] test tests::ch24_calls4 ... ok
[INFO] [stdout] test tests::ch18_values ... ok
[INFO] [stdout] test tests::ch24_calls2 ... ok
[INFO] [stdout] test tests::ch15_vm ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 8 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.05s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "63c8e70e3400848de2644204e7978a1aadb0992424e9eb61a4749fcd2db28d64", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "63c8e70e3400848de2644204e7978a1aadb0992424e9eb61a4749fcd2db28d64", kill_on_drop: false }`
[INFO] [stdout] 63c8e70e3400848de2644204e7978a1aadb0992424e9eb61a4749fcd2db28d64
