[INFO] cloning repository https://github.com/TrMen/RustLox
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/TrMen/RustLox" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTrMen%2FRustLox", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTrMen%2FRustLox'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e05374f043b964ab050f681e4a797ef198f0dd71
[INFO] checking TrMen/RustLox against master#5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f for pr-87248
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTrMen%2FRustLox" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/TrMen/RustLox on toolchain 5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/TrMen/RustLox
[INFO] finished tweaking git repo https://github.com/TrMen/RustLox
[INFO] tweaked toml for git repo https://github.com/TrMen/RustLox written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/TrMen/RustLox already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "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-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fd2a7dcaf4b1fed93f4acd7de654757ee4c5593d965b97e6fb3807f9cafb1de2
[INFO] running `Command { std: "docker" "start" "-a" "fd2a7dcaf4b1fed93f4acd7de654757ee4c5593d965b97e6fb3807f9cafb1de2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fd2a7dcaf4b1fed93f4acd7de654757ee4c5593d965b97e6fb3807f9cafb1de2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fd2a7dcaf4b1fed93f4acd7de654757ee4c5593d965b97e6fb3807f9cafb1de2", kill_on_drop: false }`
[INFO] [stdout] fd2a7dcaf4b1fed93f4acd7de654757ee4c5593d965b97e6fb3807f9cafb1de2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 555ab5c81a74601f9f951e711436518063c322c1d21ad4bdf2ea9ec616b529b6
[INFO] running `Command { std: "docker" "start" "-a" "555ab5c81a74601f9f951e711436518063c322c1d21ad4bdf2ea9ec616b529b6", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.73
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling unicode-segmentation v1.7.1
[INFO] [stderr]     Checking peekmore v1.0.0
[INFO] [stderr]     Checking strum v0.21.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.27
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]    Compiling strum_macros v0.21.1
[INFO] [stderr]    Compiling num-derive v0.3.3
[INFO] [stderr]    Compiling variant_count v1.1.0
[INFO] [stderr]     Checking bytecode v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Object`
[INFO] [stdout]  --> src/compiler.rs:3:14
[INFO] [stdout]   |
[INFO] [stdout] 3 |     object::{Object, ObjectList},
[INFO] [stdout]   |              ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `hash::Hash`
[INFO] [stdout]  --> src/object.rs:1:47
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{collections::HashSet, fmt::Display, hash::Hash, rc::Rc};
[INFO] [stdout]   |                                               ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Chunk`, `OpCode`
[INFO] [stdout]  --> src/parser.rs:2:13
[INFO] [stdout]   |
[INFO] [stdout] 2 |     chunk::{Chunk, OpCode},
[INFO] [stdout]   |             ^^^^^  ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `iter::Map`
[INFO] [stdout]  --> src/scanner.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{iter::Map, str::Chars};
[INFO] [stdout]   |           ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Neg`, `Not`, `rc::Rc`
[INFO] [stdout]  --> src/vm.rs:3:11
[INFO] [stdout]   |
[INFO] [stdout] 3 |     ops::{Neg, Not},
[INFO] [stdout]   |           ^^^  ^^^
[INFO] [stdout] 4 |     rc::Rc,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Object`
[INFO] [stdout]   --> src/vm.rs:10:14
[INFO] [stdout]    |
[INFO] [stdout] 10 |     object::{Object, ObjectList},
[INFO] [stdout]    |              ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Object`
[INFO] [stdout]  --> src/compiler.rs:3:14
[INFO] [stdout]   |
[INFO] [stdout] 3 |     object::{Object, ObjectList},
[INFO] [stdout]   |              ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `hash::Hash`
[INFO] [stdout]  --> src/object.rs:1:47
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{collections::HashSet, fmt::Display, hash::Hash, rc::Rc};
[INFO] [stdout]   |                                               ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Chunk`, `OpCode`
[INFO] [stdout]  --> src/parser.rs:2:13
[INFO] [stdout]   |
[INFO] [stdout] 2 |     chunk::{Chunk, OpCode},
[INFO] [stdout]   |             ^^^^^  ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `iter::Map`
[INFO] [stdout]  --> src/scanner.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{iter::Map, str::Chars};
[INFO] [stdout]   |           ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Neg`, `Not`, `rc::Rc`
[INFO] [stdout]  --> src/vm.rs:3:11
[INFO] [stdout]   |
[INFO] [stdout] 3 |     ops::{Neg, Not},
[INFO] [stdout]   |           ^^^  ^^^
[INFO] [stdout] 4 |     rc::Rc,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Object`
[INFO] [stdout]   --> src/vm.rs:10:14
[INFO] [stdout]    |
[INFO] [stdout] 10 |     object::{Object, ObjectList},
[INFO] [stdout]    |              ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/value.rs:63:17
[INFO] [stdout]    |
[INFO] [stdout] 63 |                 _ => None,
[INFO] [stdout]    |                 ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: irrefutable `if let` pattern
[INFO] [stdout]    --> src/value.rs:124:13
[INFO] [stdout]     |
[INFO] [stdout] 124 | /             if let (Object::String(lhs), Object::String(rhs)) = (lhs.as_ref(), rhs.as_ref()) {
[INFO] [stdout] 125 | |                 Ok(Value::Obj(Object::from_string(
[INFO] [stdout] 126 | |                     lhs.string.clone() + &rhs.string,
[INFO] [stdout] 127 | |                 )))
[INFO] [stdout] 128 | |             } else {
[INFO] [stdout] 129 | |                 Err("Operands must be numbers or strings")
[INFO] [stdout] 130 | |             }
[INFO] [stdout]     | |_____________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(irrefutable_let_patterns)]` on by default
[INFO] [stdout]     = note: this pattern will always match, so the `if let` is useless
[INFO] [stdout]     = help: consider replacing the `if let` with a `let`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `interned_strings`
[INFO] [stdout]   --> src/value.rs:55:31
[INFO] [stdout]    |
[INFO] [stdout] 55 |     fn compare_strings(&self, interned_strings: HashSet<ObjString>, rhs: &Value) -> bool {
[INFO] [stdout]    |                               ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_interned_strings`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rhs`
[INFO] [stdout]   --> src/value.rs:55:69
[INFO] [stdout]    |
[INFO] [stdout] 55 |     fn compare_strings(&self, interned_strings: HashSet<ObjString>, rhs: &Value) -> bool {
[INFO] [stdout]    |                                                                     ^^^ help: if this is intentional, prefix it with an underscore: `_rhs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `interned_strings`
[INFO] [stdout]   --> src/value.rs:70:20
[INFO] [stdout]    |
[INFO] [stdout] 70 |     fn copy(&self, interned_strings: HashSet<String>) -> Value {
[INFO] [stdout]    |                    ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_interned_strings`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `strings`
[INFO] [stdout]   --> src/object.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 29 |     strings: HashSet<String>,
[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: `compare_strings`
[INFO] [stdout]   --> src/value.rs:55:8
[INFO] [stdout]    |
[INFO] [stdout] 55 |     fn compare_strings(&self, interned_strings: HashSet<ObjString>, rhs: &Value) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `as_string`
[INFO] [stdout]   --> src/value.rs:59:8
[INFO] [stdout]    |
[INFO] [stdout] 59 |     fn as_string(&self) -> Option<&ObjString> {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `copy`
[INFO] [stdout]   --> src/value.rs:70:8
[INFO] [stdout]    |
[INFO] [stdout] 70 |     fn copy(&self, interned_strings: HashSet<String>) -> Value {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `strings`
[INFO] [stdout]   --> src/vm.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 |     strings: HashSet<String>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/value.rs:63:17
[INFO] [stdout]    |
[INFO] [stdout] 63 |                 _ => None,
[INFO] [stdout]    |                 ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: irrefutable `if let` pattern
[INFO] [stdout]    --> src/value.rs:124:13
[INFO] [stdout]     |
[INFO] [stdout] 124 | /             if let (Object::String(lhs), Object::String(rhs)) = (lhs.as_ref(), rhs.as_ref()) {
[INFO] [stdout] 125 | |                 Ok(Value::Obj(Object::from_string(
[INFO] [stdout] 126 | |                     lhs.string.clone() + &rhs.string,
[INFO] [stdout] 127 | |                 )))
[INFO] [stdout] 128 | |             } else {
[INFO] [stdout] 129 | |                 Err("Operands must be numbers or strings")
[INFO] [stdout] 130 | |             }
[INFO] [stdout]     | |_____________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(irrefutable_let_patterns)]` on by default
[INFO] [stdout]     = note: this pattern will always match, so the `if let` is useless
[INFO] [stdout]     = help: consider replacing the `if let` with a `let`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `interned_strings`
[INFO] [stdout]   --> src/value.rs:55:31
[INFO] [stdout]    |
[INFO] [stdout] 55 |     fn compare_strings(&self, interned_strings: HashSet<ObjString>, rhs: &Value) -> bool {
[INFO] [stdout]    |                               ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_interned_strings`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rhs`
[INFO] [stdout]   --> src/value.rs:55:69
[INFO] [stdout]    |
[INFO] [stdout] 55 |     fn compare_strings(&self, interned_strings: HashSet<ObjString>, rhs: &Value) -> bool {
[INFO] [stdout]    |                                                                     ^^^ help: if this is intentional, prefix it with an underscore: `_rhs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `interned_strings`
[INFO] [stdout]   --> src/value.rs:70:20
[INFO] [stdout]    |
[INFO] [stdout] 70 |     fn copy(&self, interned_strings: HashSet<String>) -> Value {
[INFO] [stdout]    |                    ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_interned_strings`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 16 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `strings`
[INFO] [stdout]   --> src/object.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 29 |     strings: HashSet<String>,
[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: `compare_strings`
[INFO] [stdout]   --> src/value.rs:55:8
[INFO] [stdout]    |
[INFO] [stdout] 55 |     fn compare_strings(&self, interned_strings: HashSet<ObjString>, rhs: &Value) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `as_string`
[INFO] [stdout]   --> src/value.rs:59:8
[INFO] [stdout]    |
[INFO] [stdout] 59 |     fn as_string(&self) -> Option<&ObjString> {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `copy`
[INFO] [stdout]   --> src/value.rs:70:8
[INFO] [stdout]    |
[INFO] [stdout] 70 |     fn copy(&self, interned_strings: HashSet<String>) -> Value {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `strings`
[INFO] [stdout]   --> src/vm.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 |     strings: HashSet<String>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 16 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 13.16s
[INFO] running `Command { std: "docker" "inspect" "555ab5c81a74601f9f951e711436518063c322c1d21ad4bdf2ea9ec616b529b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "555ab5c81a74601f9f951e711436518063c322c1d21ad4bdf2ea9ec616b529b6", kill_on_drop: false }`
[INFO] [stdout] 555ab5c81a74601f9f951e711436518063c322c1d21ad4bdf2ea9ec616b529b6