[INFO] cloning repository https://github.com/mattjquinn/rustedjvm [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mattjquinn/rustedjvm" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmattjquinn%2Frustedjvm", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmattjquinn%2Frustedjvm'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 68b31b40d3c8666bc595b3e378d5f9f2a28603de [INFO] testing mattjquinn/rustedjvm against master#432e145bd5a974c5b6f4dd9b352891bd7502b69d for pr-87041 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmattjquinn%2Frustedjvm" "/workspace/builds/worker-6/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/mattjquinn/rustedjvm on toolchain 432e145bd5a974c5b6f4dd9b352891bd7502b69d [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/mattjquinn/rustedjvm [INFO] finished tweaking git repo https://github.com/mattjquinn/rustedjvm [INFO] tweaked toml for git repo https://github.com/mattjquinn/rustedjvm written to /workspace/builds/worker-6/source/Cargo.toml [INFO] crate git repo https://github.com/mattjquinn/rustedjvm already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 79f4b6bb0496a68eaf97df4e7a8a2c73a0eb45022b74a86699c31e41aa4bb85a [INFO] running `Command { std: "docker" "start" "-a" "79f4b6bb0496a68eaf97df4e7a8a2c73a0eb45022b74a86699c31e41aa4bb85a", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "79f4b6bb0496a68eaf97df4e7a8a2c73a0eb45022b74a86699c31e41aa4bb85a", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "79f4b6bb0496a68eaf97df4e7a8a2c73a0eb45022b74a86699c31e41aa4bb85a", kill_on_drop: false }` [INFO] [stdout] 79f4b6bb0496a68eaf97df4e7a8a2c73a0eb45022b74a86699c31e41aa4bb85a [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] b7b845cbca73ab6c4a3f167746034169cd28bc2e7d8e1be6085486a1abe3f9ad [INFO] running `Command { std: "docker" "start" "-a" "b7b845cbca73ab6c4a3f167746034169cd28bc2e7d8e1be6085486a1abe3f9ad", kill_on_drop: false }` [INFO] [stderr] Compiling rusted_jvm v0.0.1 (/opt/rustwide/workdir) [INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string() [INFO] [stdout] --> src/rustedjvm/classes.rs:29:30 [INFO] [stdout] | [INFO] [stdout] 29 | display, Error::description(&why)), [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(deprecated)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string() [INFO] [stdout] --> src/rustedjvm/classes.rs:36:30 [INFO] [stdout] | [INFO] [stdout] 36 | display, Error::description(&why)), [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `operand` [INFO] [stdout] --> src/rustedjvm/interpreter.rs:103:9 [INFO] [stdout] | [INFO] [stdout] 103 | let operand: Operand = match operand_stack.pop() { [INFO] [stdout] | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_operand` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `local_var_arr` [INFO] [stdout] --> src/rustedjvm/interpreter.rs:100:13 [INFO] [stdout] | [INFO] [stdout] 100 | fn istore_1(local_var_arr: &Vec, [INFO] [stdout] | ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_local_var_arr` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `operand_stack` [INFO] [stdout] --> src/rustedjvm/interpreter.rs:194:35 [INFO] [stdout] | [INFO] [stdout] 194 | fn getstatic(object_ref: &Object, operand_stack: &mut Vec, [INFO] [stdout] | ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_operand_stack` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused arithmetic operation that must be used [INFO] [stdout] --> src/rustedjvm/exceptions.rs:26:9 [INFO] [stdout] | [INFO] [stdout] 26 | *byte_idx + *byte_idx + 2; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 6 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 1.45s [INFO] running `Command { std: "docker" "inspect" "b7b845cbca73ab6c4a3f167746034169cd28bc2e7d8e1be6085486a1abe3f9ad", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "b7b845cbca73ab6c4a3f167746034169cd28bc2e7d8e1be6085486a1abe3f9ad", kill_on_drop: false }` [INFO] [stdout] b7b845cbca73ab6c4a3f167746034169cd28bc2e7d8e1be6085486a1abe3f9ad [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 18c50677858ae2b0ab3f8eda0d8e9b0acf785d4795bf5cb4ea758056cb4ad0dc [INFO] running `Command { std: "docker" "start" "-a" "18c50677858ae2b0ab3f8eda0d8e9b0acf785d4795bf5cb4ea758056cb4ad0dc", kill_on_drop: false }` [INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string() [INFO] [stdout] --> src/rustedjvm/classes.rs:29:30 [INFO] [stdout] | [INFO] [stdout] 29 | display, Error::description(&why)), [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(deprecated)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Compiling rusted_jvm v0.0.1 (/opt/rustwide/workdir) [INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string() [INFO] [stdout] --> src/rustedjvm/classes.rs:36:30 [INFO] [stdout] | [INFO] [stdout] 36 | display, Error::description(&why)), [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `operand` [INFO] [stdout] --> src/rustedjvm/interpreter.rs:103:9 [INFO] [stdout] | [INFO] [stdout] 103 | let operand: Operand = match operand_stack.pop() { [INFO] [stdout] | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_operand` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `local_var_arr` [INFO] [stdout] --> src/rustedjvm/interpreter.rs:100:13 [INFO] [stdout] | [INFO] [stdout] 100 | fn istore_1(local_var_arr: &Vec, [INFO] [stdout] | ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_local_var_arr` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `operand_stack` [INFO] [stdout] --> src/rustedjvm/interpreter.rs:194:35 [INFO] [stdout] | [INFO] [stdout] 194 | fn getstatic(object_ref: &Object, operand_stack: &mut Vec, [INFO] [stdout] | ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_operand_stack` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused arithmetic operation that must be used [INFO] [stdout] --> src/rustedjvm/exceptions.rs:26:9 [INFO] [stdout] | [INFO] [stdout] 26 | *byte_idx + *byte_idx + 2; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 6 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string() [INFO] [stdout] --> src/rustedjvm/classes.rs:29:30 [INFO] [stdout] | [INFO] [stdout] 29 | display, Error::description(&why)), [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(deprecated)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string() [INFO] [stdout] --> src/rustedjvm/classes.rs:36:30 [INFO] [stdout] | [INFO] [stdout] 36 | display, Error::description(&why)), [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `operand` [INFO] [stdout] --> src/rustedjvm/interpreter.rs:103:9 [INFO] [stdout] | [INFO] [stdout] 103 | let operand: Operand = match operand_stack.pop() { [INFO] [stdout] | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_operand` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `local_var_arr` [INFO] [stdout] --> src/rustedjvm/interpreter.rs:100:13 [INFO] [stdout] | [INFO] [stdout] 100 | fn istore_1(local_var_arr: &Vec, [INFO] [stdout] | ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_local_var_arr` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `operand_stack` [INFO] [stdout] --> src/rustedjvm/interpreter.rs:194:35 [INFO] [stdout] | [INFO] [stdout] 194 | fn getstatic(object_ref: &Object, operand_stack: &mut Vec, [INFO] [stdout] | ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_operand_stack` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused arithmetic operation that must be used [INFO] [stdout] --> src/rustedjvm/exceptions.rs:26:9 [INFO] [stdout] | [INFO] [stdout] 26 | *byte_idx + *byte_idx + 2; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 6 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 0.71s [INFO] running `Command { std: "docker" "inspect" "18c50677858ae2b0ab3f8eda0d8e9b0acf785d4795bf5cb4ea758056cb4ad0dc", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "18c50677858ae2b0ab3f8eda0d8e9b0acf785d4795bf5cb4ea758056cb4ad0dc", kill_on_drop: false }` [INFO] [stdout] 18c50677858ae2b0ab3f8eda0d8e9b0acf785d4795bf5cb4ea758056cb4ad0dc [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "test" "--frozen", kill_on_drop: false }` [INFO] [stdout] 301c1716e6326d48135b7c586f06136bc447f76c5db71ca643609517ec6b9c63 [INFO] running `Command { std: "docker" "start" "-a" "301c1716e6326d48135b7c586f06136bc447f76c5db71ca643609517ec6b9c63", kill_on_drop: false }` [INFO] [stdout] [INFO] [stderr] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string() [INFO] [stdout] running 0 tests [INFO] [stderr] --> src/rustedjvm/classes.rs:29:30 [INFO] [stdout] [INFO] [stderr] | [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s [INFO] [stderr] 29 | display, Error::description(&why)), [INFO] [stdout] [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stderr] | [INFO] [stdout] running 1 test [INFO] [stderr] = note: `#[warn(deprecated)]` on by default [INFO] [stderr] [INFO] [stderr] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string() [INFO] [stderr] --> src/rustedjvm/classes.rs:36:30 [INFO] [stderr] | [INFO] [stderr] 36 | display, Error::description(&why)), [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused variable: `operand` [INFO] [stderr] --> src/rustedjvm/interpreter.rs:103:9 [INFO] [stderr] | [INFO] [stderr] 103 | let operand: Operand = match operand_stack.pop() { [INFO] [stderr] | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_operand` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `local_var_arr` [INFO] [stderr] --> src/rustedjvm/interpreter.rs:100:13 [INFO] [stderr] | [INFO] [stderr] 100 | fn istore_1(local_var_arr: &Vec, [INFO] [stderr] | ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_local_var_arr` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `operand_stack` [INFO] [stderr] --> src/rustedjvm/interpreter.rs:194:35 [INFO] [stderr] | [INFO] [stderr] 194 | fn getstatic(object_ref: &Object, operand_stack: &mut Vec, [INFO] [stderr] | ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_operand_stack` [INFO] [stderr] [INFO] [stderr] warning: unused arithmetic operation that must be used [INFO] [stderr] --> src/rustedjvm/exceptions.rs:26:9 [INFO] [stderr] | [INFO] [stderr] 26 | *byte_idx + *byte_idx + 2; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_must_use)]` on by default [INFO] [stderr] [INFO] [stderr] warning: 6 warnings emitted [INFO] [stderr] [INFO] [stderr] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string() [INFO] [stderr] --> src/rustedjvm/classes.rs:29:30 [INFO] [stderr] | [INFO] [stderr] 29 | display, Error::description(&why)), [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(deprecated)]` on by default [INFO] [stderr] [INFO] [stderr] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string() [INFO] [stderr] --> src/rustedjvm/classes.rs:36:30 [INFO] [stderr] | [INFO] [stderr] 36 | display, Error::description(&why)), [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused variable: `operand` [INFO] [stderr] --> src/rustedjvm/interpreter.rs:103:9 [INFO] [stderr] | [INFO] [stderr] 103 | let operand: Operand = match operand_stack.pop() { [INFO] [stderr] | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_operand` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `local_var_arr` [INFO] [stderr] --> src/rustedjvm/interpreter.rs:100:13 [INFO] [stderr] | [INFO] [stderr] 100 | fn istore_1(local_var_arr: &Vec, [INFO] [stderr] | ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_local_var_arr` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `operand_stack` [INFO] [stderr] --> src/rustedjvm/interpreter.rs:194:35 [INFO] [stderr] | [INFO] [stderr] 194 | fn getstatic(object_ref: &Object, operand_stack: &mut Vec, [INFO] [stderr] | ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_operand_stack` [INFO] [stderr] [INFO] [stderr] warning: unused arithmetic operation that must be used [INFO] [stderr] --> src/rustedjvm/exceptions.rs:26:9 [INFO] [stderr] | [INFO] [stderr] 26 | *byte_idx + *byte_idx + 2; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_must_use)]` on by default [INFO] [stderr] [INFO] [stderr] warning: 6 warnings emitted [INFO] [stderr] [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 0.02s [INFO] [stderr] Running unittests (/opt/rustwide/target/debug/deps/rustedjvm-3afbac8b2a6cc40c) [INFO] [stderr] Running unittests (/opt/rustwide/target/debug/deps/rusted_jvm-a88e377ca538ced9) [INFO] [stdout] test tests::test_simple_addition ... ok [INFO] [stderr] Doc-tests rustedjvm [INFO] [stdout] [INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s [INFO] [stdout] [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] running `Command { std: "docker" "inspect" "301c1716e6326d48135b7c586f06136bc447f76c5db71ca643609517ec6b9c63", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "301c1716e6326d48135b7c586f06136bc447f76c5db71ca643609517ec6b9c63", kill_on_drop: false }` [INFO] [stdout] 301c1716e6326d48135b7c586f06136bc447f76c5db71ca643609517ec6b9c63