[INFO] fetching crate lox-lang 0.0.3...
[INFO] testing lox-lang-0.0.3 against try#dec9417b8611e34e787a3e4c37686b5131f9e5c5 for pr-154210-1
[INFO] extracting crate lox-lang 0.0.3 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate lox-lang 0.0.3
[INFO] finished tweaking crates.io crate lox-lang 0.0.3
[INFO] tweaked toml for crates.io crate lox-lang 0.0.3 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate lox-lang 0.0.3 on toolchain dec9417b8611e34e787a3e4c37686b5131f9e5c5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate lox-lang 0.0.3 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" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 274f0a13e017857fc113b52d567ad62bb65ee994f65b4d177dc902c69e7a9ce9
[INFO] running `Command { std: "docker" "start" "-a" "274f0a13e017857fc113b52d567ad62bb65ee994f65b4d177dc902c69e7a9ce9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "274f0a13e017857fc113b52d567ad62bb65ee994f65b4d177dc902c69e7a9ce9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "274f0a13e017857fc113b52d567ad62bb65ee994f65b4d177dc902c69e7a9ce9", kill_on_drop: false }`
[INFO] [stdout] 274f0a13e017857fc113b52d567ad62bb65ee994f65b4d177dc902c69e7a9ce9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c9aa95aaa94123969eb1566fb2c1e26370c799d9caeeb2453178f174c2ca7b1f
[INFO] running `Command { std: "docker" "start" "-a" "c9aa95aaa94123969eb1566fb2c1e26370c799d9caeeb2453178f174c2ca7b1f", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.69
[INFO] [stderr]    Compiling proc-macro2 v1.0.12
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling version_check v0.9.1
[INFO] [stderr]    Compiling syn v1.0.19
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling num-integer v0.1.42
[INFO] [stderr]    Compiling cc v1.0.52
[INFO] [stderr]    Compiling fs_extra v1.1.0
[INFO] [stderr]    Compiling indexmap v1.3.2
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling unicode-width v0.1.7
[INFO] [stderr]    Compiling os_str_bytes v2.3.0
[INFO] [stderr]    Compiling termcolor v1.1.0
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling proc-macro-error-attr v0.4.12
[INFO] [stderr]    Compiling proc-macro-error v0.4.12
[INFO] [stderr]    Compiling jemalloc-sys v0.3.2
[INFO] [stderr]    Compiling dirs-sys v0.3.4
[INFO] [stderr]    Compiling time v0.1.43
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling quote v1.0.4
[INFO] [stderr]    Compiling dirs v2.0.2
[INFO] [stderr]    Compiling term v0.6.1
[INFO] [stderr]    Compiling chrono v0.4.11
[INFO] [stderr]    Compiling simplelog v0.7.6
[INFO] [stderr]    Compiling syn-mid v0.5.0
[INFO] [stderr]    Compiling clap_derive v3.0.0-beta.1
[INFO] [stderr]    Compiling clap v3.0.0-beta.1
[INFO] [stderr]    Compiling jemallocator v0.3.2
[INFO] [stderr]    Compiling lox-lang v0.0.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]    --> src/compiler/wrapper.rs:102:16
[INFO] [stdout]     |
[INFO] [stdout] 100 | pub(super) struct ClassWrapper {
[INFO] [stdout]     |                   ------------ field in this struct
[INFO] [stdout] 101 |     pub(super) enclosing: Option<Box<Self>>,
[INFO] [stdout] 102 |     pub(super) name: Box<str>,
[INFO] [stdout]     |                ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `ClassWrapper` 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: variants `CallStackOverflow` and `ValueStackOverflow` are never constructed
[INFO] [stdout]   --> src/vm/errors.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout]  4 | pub(crate) enum RuntimeError {
[INFO] [stdout]    |                 ------------ variants in this enum
[INFO] [stdout] ...
[INFO] [stdout] 11 |     CallStackOverflow,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 12 |     ValueStackOverflow,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `RuntimeError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/compiler/mod.rs:893:22
[INFO] [stdout]     |
[INFO] [stdout] 893 |             (&**text).clone()
[INFO] [stdout]     |                      ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `str` does not implement `Clone`, so calling `clone` on `&str` copies the reference, which does not do anything and can be removed
[INFO] [stdout]     = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Box::<T>::from_raw` that must be used
[INFO] [stdout]   --> src/lox_core/obj.rs:64:13
[INFO] [stdout]    |
[INFO] [stdout] 64 |             Box::from_raw(self.0);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: call `drop(Box::from_raw(ptr))` if you intend to drop the `Box`
[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] 64 |             let _ = Box::from_raw(self.0);
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 26.74s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: fs_extra v1.1.0
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 5`
[INFO] running `Command { std: "docker" "inspect" "c9aa95aaa94123969eb1566fb2c1e26370c799d9caeeb2453178f174c2ca7b1f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c9aa95aaa94123969eb1566fb2c1e26370c799d9caeeb2453178f174c2ca7b1f", kill_on_drop: false }`
[INFO] [stdout] c9aa95aaa94123969eb1566fb2c1e26370c799d9caeeb2453178f174c2ca7b1f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f7f96d9191459cb4f23bcb14957c3f37febde381bf75b0523b21d4bfc63baba3
[INFO] running `Command { std: "docker" "start" "-a" "f7f96d9191459cb4f23bcb14957c3f37febde381bf75b0523b21d4bfc63baba3", kill_on_drop: false }`
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]    --> src/compiler/wrapper.rs:102:16
[INFO] [stdout]     |
[INFO] [stdout] 100 | pub(super) struct ClassWrapper {
[INFO] [stdout]     |                   ------------ field in this struct
[INFO] [stdout] 101 |     pub(super) enclosing: Option<Box<Self>>,
[INFO] [stdout] 102 |     pub(super) name: Box<str>,
[INFO] [stdout]     |                ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `ClassWrapper` 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: variants `CallStackOverflow` and `ValueStackOverflow` are never constructed
[INFO] [stdout]   --> src/vm/errors.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout]  4 | pub(crate) enum RuntimeError {
[INFO] [stdout]    |                 ------------ variants in this enum
[INFO] [stdout] ...
[INFO] [stdout] 11 |     CallStackOverflow,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 12 |     ValueStackOverflow,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `RuntimeError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/compiler/mod.rs:893:22
[INFO] [stdout]     |
[INFO] [stdout] 893 |             (&**text).clone()
[INFO] [stdout]     |                      ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `str` does not implement `Clone`, so calling `clone` on `&str` copies the reference, which does not do anything and can be removed
[INFO] [stdout]     = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Box::<T>::from_raw` that must be used
[INFO] [stdout]   --> src/lox_core/obj.rs:64:13
[INFO] [stdout]    |
[INFO] [stdout] 64 |             Box::from_raw(self.0);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: call `drop(Box::from_raw(ptr))` if you intend to drop the `Box`
[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] 64 |             let _ = Box::from_raw(self.0);
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling lox-lang v0.0.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]    --> src/compiler/wrapper.rs:102:16
[INFO] [stdout]     |
[INFO] [stdout] 100 | pub(super) struct ClassWrapper {
[INFO] [stdout]     |                   ------------ field in this struct
[INFO] [stdout] 101 |     pub(super) enclosing: Option<Box<Self>>,
[INFO] [stdout] 102 |     pub(super) name: Box<str>,
[INFO] [stdout]     |                ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `ClassWrapper` 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: variants `CallStackOverflow` and `ValueStackOverflow` are never constructed
[INFO] [stdout]   --> src/vm/errors.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout]  4 | pub(crate) enum RuntimeError {
[INFO] [stdout]    |                 ------------ variants in this enum
[INFO] [stdout] ...
[INFO] [stdout] 11 |     CallStackOverflow,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 12 |     ValueStackOverflow,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `RuntimeError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/compiler/mod.rs:893:22
[INFO] [stdout]     |
[INFO] [stdout] 893 |             (&**text).clone()
[INFO] [stdout]     |                      ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `str` does not implement `Clone`, so calling `clone` on `&str` copies the reference, which does not do anything and can be removed
[INFO] [stdout]     = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Box::<T>::from_raw` that must be used
[INFO] [stdout]   --> src/lox_core/obj.rs:64:13
[INFO] [stdout]    |
[INFO] [stdout] 64 |             Box::from_raw(self.0);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: call `drop(Box::from_raw(ptr))` if you intend to drop the `Box`
[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] 64 |             let _ = Box::from_raw(self.0);
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.39s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: fs_extra v1.1.0
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 5`
[INFO] running `Command { std: "docker" "inspect" "f7f96d9191459cb4f23bcb14957c3f37febde381bf75b0523b21d4bfc63baba3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f7f96d9191459cb4f23bcb14957c3f37febde381bf75b0523b21d4bfc63baba3", kill_on_drop: false }`
[INFO] [stdout] f7f96d9191459cb4f23bcb14957c3f37febde381bf75b0523b21d4bfc63baba3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 66a030e3b481b60613c5ec6b9cffd86fe87672755571996f25f00b71eaade661
[INFO] running `Command { std: "docker" "start" "-a" "66a030e3b481b60613c5ec6b9cffd86fe87672755571996f25f00b71eaade661", kill_on_drop: false }`
[INFO] [stderr] warning: field `name` is never read
[INFO] [stderr]    --> src/compiler/wrapper.rs:102:16
[INFO] [stderr]     |
[INFO] [stderr] 100 | pub(super) struct ClassWrapper {
[INFO] [stderr]     |                   ------------ field in this struct
[INFO] [stderr] 101 |     pub(super) enclosing: Option<Box<Self>>,
[INFO] [stderr] 102 |     pub(super) name: Box<str>,
[INFO] [stderr]     |                ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `ClassWrapper` 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: variants `CallStackOverflow` and `ValueStackOverflow` are never constructed
[INFO] [stderr]   --> src/vm/errors.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr]  4 | pub(crate) enum RuntimeError {
[INFO] [stderr]    |                 ------------ variants in this enum
[INFO] [stderr] ...
[INFO] [stderr] 11 |     CallStackOverflow,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 12 |     ValueStackOverflow,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `RuntimeError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stderr]    --> src/compiler/mod.rs:893:22
[INFO] [stderr]     |
[INFO] [stderr] 893 |             (&**text).clone()
[INFO] [stderr]     |                      ^^^^^^^^ help: remove this redundant call
[INFO] [stderr]     |
[INFO] [stderr]     = note: the type `str` does not implement `Clone`, so calling `clone` on `&str` copies the reference, which does not do anything and can be removed
[INFO] [stderr]     = note: `#[warn(noop_method_call)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `Box::<T>::from_raw` that must be used
[INFO] [stderr]   --> src/lox_core/obj.rs:64:13
[INFO] [stderr]    |
[INFO] [stderr] 64 |             Box::from_raw(self.0);
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: call `drop(Box::from_raw(ptr))` if you intend to drop the `Box`
[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] 64 |             let _ = Box::from_raw(self.0);
[INFO] [stderr]    |             +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `lox-lang` (lib) generated 4 warnings (run `cargo fix --lib -p lox-lang` to apply 1 suggestion)
[INFO] [stderr] warning: `lox-lang` (lib test) generated 4 warnings (4 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: fs_extra v1.1.0
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 5`
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/lox_lang-ce8a13639c6e33df)
[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] [stderr]      Running unittests src/bin/loxi.rs (/opt/rustwide/target/debug/deps/loxi-cac827d1e9aa7399)
[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] [stderr]      Running tests/classes.rs (/opt/rustwide/target/debug/deps/classes-e295568282e60a5b)
[INFO] [stdout] 
[INFO] [stdout] running 15 tests
[INFO] [stdout] test define_methods ... ok
[INFO] [stdout] test inherit ... ok
[INFO] [stdout] test instance ... ok
[INFO] [stdout] test invoke_field ... ok
[INFO] [stdout] test init ... ok
[INFO] [stdout] test no_this ... ok
[INFO] [stdout] test object ... ok
[INFO] [stdout] test say_name ... ok
[INFO] [stdout] test properties ... ok
[INFO] [stdout] test setter ... ok
[INFO] [stdout] test super_access ... ok
[INFO] [stdout] test super_call ... ok
[INFO] [stdout] test this ... ok
[INFO] [stdout] test super_doughnut ... ok
[INFO] [stdout] test bad_getter - should panic ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 15 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/closure.rs (/opt/rustwide/target/debug/deps/closure-c45336ccdad3957c)
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test deferred_declaration ... ok
[INFO] [stdout] test fun_argument ... ok
[INFO] [stdout] test local ... ok
[INFO] [stdout] test inner_outer ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/function.rs (/opt/rustwide/target/debug/deps/function-0e5935186165b7f4)
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test no_return ... ok
[INFO] [stdout] test print ... ok
[INFO] [stdout] test sum ... ok
[INFO] [stdout] test not_a_function - should panic ... ok
[INFO] [stdout] test top_level_return - should panic ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests lox_lang
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test src/vm/mod.rs - vm::VM (line 22) ... ok
[INFO] [stdout] test src/lib.rs - (line 26) ... ok
[INFO] [stdout] test src/vm/mod.rs - vm::VM::define_global (line 117) ... ok
[INFO] [stdout] test src/vm/io.rs - vm::io::VM::buffer_output (line 19) ... ok
[INFO] [stdout] test src/lox_core/mod.rs - lox_core::NativeFun (line 299) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.16s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "66a030e3b481b60613c5ec6b9cffd86fe87672755571996f25f00b71eaade661", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "66a030e3b481b60613c5ec6b9cffd86fe87672755571996f25f00b71eaade661", kill_on_drop: false }`
[INFO] [stdout] 66a030e3b481b60613c5ec6b9cffd86fe87672755571996f25f00b71eaade661