[INFO] cloning repository https://github.com/themasch/rust-jvm
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/themasch/rust-jvm" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthemasch%2Frust-jvm", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthemasch%2Frust-jvm'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2d7418c568670d8bcc52ef7e64cc0704f9c34eb1
[INFO] checking themasch/rust-jvm against try#863511eff87e66198b396935f3b5c8a543022f53 for pr-139493-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthemasch%2Frust-jvm" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/themasch/rust-jvm
[INFO] finished tweaking git repo https://github.com/themasch/rust-jvm
[INFO] tweaked toml for git repo https://github.com/themasch/rust-jvm written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/themasch/rust-jvm on toolchain 863511eff87e66198b396935f3b5c8a543022f53
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+863511eff87e66198b396935f3b5c8a543022f53" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/themasch/rust-jvm 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" "+863511eff87e66198b396935f3b5c8a543022f53" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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" "+863511eff87e66198b396935f3b5c8a543022f53" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 393c91cf0ad2b3b9cb6a4c0354d3536115a7b001047600bb6c169cbabebcd282
[INFO] running `Command { std: "docker" "start" "-a" "393c91cf0ad2b3b9cb6a4c0354d3536115a7b001047600bb6c169cbabebcd282", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "393c91cf0ad2b3b9cb6a4c0354d3536115a7b001047600bb6c169cbabebcd282", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "393c91cf0ad2b3b9cb6a4c0354d3536115a7b001047600bb6c169cbabebcd282", kill_on_drop: false }`
[INFO] [stdout] 393c91cf0ad2b3b9cb6a4c0354d3536115a7b001047600bb6c169cbabebcd282
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+863511eff87e66198b396935f3b5c8a543022f53" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9431176a43e5706784a03d6db0de0e294eaf3fdab12ea19883f6ecc8a591c250
[INFO] running `Command { std: "docker" "start" "-a" "9431176a43e5706784a03d6db0de0e294eaf3fdab12ea19883f6ecc8a591c250", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]    Compiling cc v1.0.18
[INFO] [stderr]    Compiling unicode-xid v0.0.4
[INFO] [stderr]     Checking libc v0.2.40
[INFO] [stderr]    Compiling quote v0.3.15
[INFO] [stderr]     Checking cfg-if v0.1.4
[INFO] [stderr]     Checking rustc-demangle v0.1.9
[INFO] [stderr]    Compiling synom v0.11.3
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr]     Checking memchr v2.0.1
[INFO] [stderr]     Checking nom v4.0.0
[INFO] [stderr]    Compiling backtrace-sys v0.1.23
[INFO] [stderr]    Compiling synstructure v0.6.1
[INFO] [stderr]    Compiling failure_derive v0.1.1
[INFO] [stderr]     Checking backtrace v0.3.9
[INFO] [stderr]     Checking failure v0.1.1
[INFO] [stderr]     Checking rjvm v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0659]: `dbg` is ambiguous
[INFO] [stdout]    --> src/java/class_file/parser.rs:259:5
[INFO] [stdout]     |
[INFO] [stdout] 259 |     dbg!(do_parse!(
[INFO] [stdout]     |     ^^^ ambiguous name
[INFO] [stdout]     |
[INFO] [stdout]     = note: ambiguous because of a conflict between a name from a glob import and an outer scope during import or macro resolution
[INFO] [stdout] note: `dbg` could refer to the macro imported here
[INFO] [stdout]    --> src/java/class_file/parser.rs:1:5
[INFO] [stdout]     |
[INFO] [stdout]   1 | use nom::*;
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     = help: consider adding an explicit import of `dbg` to disambiguate
[INFO] [stdout]     = help: or use `self::dbg` to refer to this macro unambiguously
[INFO] [stdout] note: `dbg` could also refer to a macro from prelude
[INFO] [stdout]    --> /rustc/863511eff87e66198b396935f3b5c8a543022f53/library/std/src/prelude/mod.rs:123:13
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `nom::*`
[INFO] [stdout]    --> src/java/class_file/parser.rs:326:9
[INFO] [stdout]     |
[INFO] [stdout] 326 |     use nom::*;
[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 import: `nom::IResult`
[INFO] [stdout]    --> src/java/class_file/mod.rs:112:5
[INFO] [stdout]     |
[INFO] [stdout] 112 | use nom::IResult;
[INFO] [stdout]     |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::slice::Iter`
[INFO] [stdout]    --> src/java/class_file/mod.rs:113:5
[INFO] [stdout]     |
[INFO] [stdout] 113 | use std::slice::Iter;
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/java/instructions.rs:18:25
[INFO] [stdout]     |
[INFO] [stdout]  18 |                   $name ( ( $($t),* ) )
[INFO] [stdout]     |                           ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  69 | / instruction!(
[INFO] [stdout]  70 | |     0x00 => (1): [ () ] => NOOP(),
[INFO] [stdout]  71 | |     0x01 => (1): [ () ] => AConstNull(),
[INFO] [stdout]  72 | |     0x02 => (1): [ () ] => IConstm1(),
[INFO] [stdout] ...   |
[INFO] [stdout] 274 | |     0xff => (1): [ () ] => ImpDep2()
[INFO] [stdout] 275 | | );
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout]     = note: this warning originates in the macro `instruction` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `java::class_file::ClassFile`
[INFO] [stdout]    --> src/java/runtime/mod.rs:456:9
[INFO] [stdout]     |
[INFO] [stdout] 456 |     use java::class_file::ClassFile;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `java::class_file::Method`
[INFO] [stdout]    --> src/java/runtime/mod.rs:457:9
[INFO] [stdout]     |
[INFO] [stdout] 457 |     use java::class_file::Method;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> src/main.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #[macro_use]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `java::class_file::Attribute`
[INFO] [stdout]   --> src/main.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use java::class_file::Attribute;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `java::class_file::CodeBlock`
[INFO] [stdout]   --> src/main.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use java::class_file::CodeBlock;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0659]: `dbg` is ambiguous
[INFO] [stdout]    --> src/java/class_file/parser.rs:259:5
[INFO] [stdout]     |
[INFO] [stdout] 259 |     dbg!(do_parse!(
[INFO] [stdout]     |     ^^^ ambiguous name
[INFO] [stdout]     |
[INFO] [stdout]     = note: ambiguous because of a conflict between a name from a glob import and an outer scope during import or macro resolution
[INFO] [stdout] note: `dbg` could refer to the macro imported here
[INFO] [stdout]    --> src/java/class_file/parser.rs:1:5
[INFO] [stdout]     |
[INFO] [stdout]   1 | use nom::*;
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     = help: consider adding an explicit import of `dbg` to disambiguate
[INFO] [stdout]     = help: or use `self::dbg` to refer to this macro unambiguously
[INFO] [stdout] note: `dbg` could also refer to a macro from prelude
[INFO] [stdout]    --> /rustc/863511eff87e66198b396935f3b5c8a543022f53/library/std/src/prelude/mod.rs:123:13
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `nom::IResult`
[INFO] [stdout]    --> src/java/class_file/mod.rs:112:5
[INFO] [stdout]     |
[INFO] [stdout] 112 | use nom::IResult;
[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 import: `std::slice::Iter`
[INFO] [stdout]    --> src/java/class_file/mod.rs:113:5
[INFO] [stdout]     |
[INFO] [stdout] 113 | use std::slice::Iter;
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/java/instructions.rs:18:25
[INFO] [stdout]     |
[INFO] [stdout]  18 |                   $name ( ( $($t),* ) )
[INFO] [stdout]     |                           ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  69 | / instruction!(
[INFO] [stdout]  70 | |     0x00 => (1): [ () ] => NOOP(),
[INFO] [stdout]  71 | |     0x01 => (1): [ () ] => AConstNull(),
[INFO] [stdout]  72 | |     0x02 => (1): [ () ] => IConstm1(),
[INFO] [stdout] ...   |
[INFO] [stdout] 274 | |     0xff => (1): [ () ] => ImpDep2()
[INFO] [stdout] 275 | | );
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout]     = note: this warning originates in the macro `instruction` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> src/main.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #[macro_use]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `java::class_file::Attribute`
[INFO] [stdout]   --> src/main.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use java::class_file::Attribute;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `java::class_file::CodeBlock`
[INFO] [stdout]   --> src/main.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use java::class_file::CodeBlock;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable call
[INFO] [stdout]   --> src/java/class_file/parser.rs:38:7
[INFO] [stdout]    |
[INFO] [stdout] 26 | /     loop {
[INFO] [stdout] 27 | |         if input[0] == b')' {
[INFO] [stdout] 28 | |             return Ok((&input[1..], vec));
[INFO] [stdout] ...  |
[INFO] [stdout] 38 | |     }.clone()
[INFO] [stdout]    | |     - ^^^^^ unreachable call
[INFO] [stdout]    | |_____|
[INFO] [stdout]    |       any code following this expression is unreachable
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable call
[INFO] [stdout]   --> src/java/class_file/parser.rs:38:7
[INFO] [stdout]    |
[INFO] [stdout] 26 | /     loop {
[INFO] [stdout] 27 | |         if input[0] == b')' {
[INFO] [stdout] 28 | |             return Ok((&input[1..], vec));
[INFO] [stdout] ...  |
[INFO] [stdout] 38 | |     }.clone()
[INFO] [stdout]    | |     - ^^^^^ unreachable call
[INFO] [stdout]    | |_____|
[INFO] [stdout]    |       any code following this expression is unreachable
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `input`
[INFO] [stdout]    --> src/java/class_file/parser.rs:342:13
[INFO] [stdout]     |
[INFO] [stdout] 342 |         let input = b"()V";
[INFO] [stdout]     |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_input`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rem`
[INFO] [stdout]    --> src/java/class_file/mod.rs:121:17
[INFO] [stdout]     |
[INFO] [stdout] 121 |             Ok((rem, (args, ret))) => Ok(MethodDescriptor { arguments: args, return_type: ret }),
[INFO] [stdout]     |                 ^^^ help: if this is intentional, prefix it with an underscore: `_rem`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rem`
[INFO] [stdout]    --> src/java/class_file/mod.rs:121:17
[INFO] [stdout]     |
[INFO] [stdout] 121 |             Ok((rem, (args, ret))) => Ok(MethodDescriptor { arguments: args, return_type: ret }),
[INFO] [stdout]     |                 ^^^ help: if this is intentional, prefix it with an underscore: `_rem`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/java/runtime/mod.rs:65:13
[INFO] [stdout]    |
[INFO] [stdout] 65 |         for i in 0..size {
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arg_type`
[INFO] [stdout]    --> src/java/runtime/mod.rs:347:89
[INFO] [stdout]     |
[INFO] [stdout] 347 | ...                   let mut args = method.get_signature().arguments.iter().map(|arg_type| {
[INFO] [stdout]     |                                                                                   ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_arg_type`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]    --> src/java/runtime/mod.rs:290:40
[INFO] [stdout]     |
[INFO] [stdout] 290 |             Instruction::IInc((offset, value)) => match stack_frame.get_variable_mut(usize::from(*offset)) {
[INFO] [stdout]     |                                        ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/java/runtime/mod.rs:65:13
[INFO] [stdout]    |
[INFO] [stdout] 65 |         for i in 0..size {
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/java/runtime/mod.rs:390:13
[INFO] [stdout]     |
[INFO] [stdout] 390 |         let mut return_value: Option<StackValue> = None;
[INFO] [stdout]     |             ----^^^^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `return_value`
[INFO] [stdout]    --> src/java/runtime/mod.rs:390:13
[INFO] [stdout]     |
[INFO] [stdout] 390 |         let mut return_value: Option<StackValue> = None;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_return_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0659`.
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arg_type`
[INFO] [stdout]    --> src/java/runtime/mod.rs:347:89
[INFO] [stdout]     |
[INFO] [stdout] 347 | ...                   let mut args = method.get_signature().arguments.iter().map(|arg_type| {
[INFO] [stdout]     |                                                                                   ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_arg_type`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]    --> src/java/runtime/mod.rs:290:40
[INFO] [stdout]     |
[INFO] [stdout] 290 |             Instruction::IInc((offset, value)) => match stack_frame.get_variable_mut(usize::from(*offset)) {
[INFO] [stdout]     |                                        ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/java/runtime/mod.rs:390:13
[INFO] [stdout]     |
[INFO] [stdout] 390 |         let mut return_value: Option<StackValue> = None;
[INFO] [stdout]     |             ----^^^^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `return_value`
[INFO] [stdout]    --> src/java/runtime/mod.rs:390:13
[INFO] [stdout]     |
[INFO] [stdout] 390 |         let mut return_value: Option<StackValue> = None;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_return_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0659`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rjvm` (bin "rjvm") due to 1 previous error; 13 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `rjvm` (bin "rjvm" test) due to 1 previous error; 17 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "9431176a43e5706784a03d6db0de0e294eaf3fdab12ea19883f6ecc8a591c250", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9431176a43e5706784a03d6db0de0e294eaf3fdab12ea19883f6ecc8a591c250", kill_on_drop: false }`
[INFO] [stdout] 9431176a43e5706784a03d6db0de0e294eaf3fdab12ea19883f6ecc8a591c250
