[INFO] cloning repository https://github.com/vitvakatu/test_attach
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/vitvakatu/test_attach" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvitvakatu%2Ftest_attach", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvitvakatu%2Ftest_attach'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d1d1d104d4375f96df0efc94b63a81ffe1c69489
[INFO] testing vitvakatu/test_attach against beta-2024-12-08 for beta-1.84.0-4-retry
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvitvakatu%2Ftest_attach" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/vitvakatu/test_attach on toolchain beta-2024-12-08
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2024-12-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/vitvakatu/test_attach
[INFO] finished tweaking git repo https://github.com/vitvakatu/test_attach
[INFO] tweaked toml for git repo https://github.com/vitvakatu/test_attach written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/vitvakatu/test_attach 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" "+beta-2024-12-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2024-12-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e59c050c24f46c3a294ea4918664ea66b01e2a01edb1c13b22111fcf9a5d5a55
[INFO] running `Command { std: "docker" "start" "-a" "e59c050c24f46c3a294ea4918664ea66b01e2a01edb1c13b22111fcf9a5d5a55", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e59c050c24f46c3a294ea4918664ea66b01e2a01edb1c13b22111fcf9a5d5a55", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e59c050c24f46c3a294ea4918664ea66b01e2a01edb1c13b22111fcf9a5d5a55", kill_on_drop: false }`
[INFO] [stdout] e59c050c24f46c3a294ea4918664ea66b01e2a01edb1c13b22111fcf9a5d5a55
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2024-12-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ce6e4c81590490eeabcc1f0c94bf00324de9e5d9447bb5f76bc7f2ff7dc67792
[INFO] running `Command { std: "docker" "start" "-a" "ce6e4c81590490eeabcc1f0c94bf00324de9e5d9447bb5f76bc7f2ff7dc67792", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.55
[INFO] [stderr]    Compiling cc v1.0.37
[INFO] [stderr]    Compiling autocfg v0.1.4
[INFO] [stderr]    Compiling memchr v2.2.0
[INFO] [stderr]    Compiling version_check v0.1.5
[INFO] [stderr]    Compiling cfg-if v0.1.9
[INFO] [stderr]    Compiling byteorder v1.3.1
[INFO] [stderr]    Compiling same-file v1.0.4
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling rustc-demangle v0.1.14
[INFO] [stderr]    Compiling ascii v0.9.1
[INFO] [stderr]    Compiling either v1.5.2
[INFO] [stderr]    Compiling jni-sys v0.3.0
[INFO] [stderr]    Compiling cesu8 v1.1.0
[INFO] [stderr]    Compiling log v0.4.6
[INFO] [stderr]    Compiling unreachable v1.0.0
[INFO] [stderr]    Compiling walkdir v2.2.7
[INFO] [stderr]    Compiling backtrace v0.3.20
[INFO] [stderr]    Compiling error-chain v0.12.1
[INFO] [stderr]    Compiling jni v0.12.2
[INFO] [stderr]    Compiling combine v3.8.1
[INFO] [stderr]    Compiling backtrace-sys v0.1.28
[INFO] [stderr]    Compiling test_detach v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `InitArgs`
[INFO] [stdout]  --> src/main.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use jni::{InitArgs, InitArgsBuilder, JNIVersion};
[INFO] [stdout]   |           ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::mem::forget`
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::mem::forget;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `AttachGuard`
[INFO] [stdout]   --> src/executors.rs:17:27
[INFO] [stdout]    |
[INFO] [stdout] 17 | use jni::{JNIEnv, JavaVM, AttachGuard};
[INFO] [stdout]    |                           ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Ref`
[INFO] [stdout]   --> src/executors.rs:24:26
[INFO] [stdout]    |
[INFO] [stdout] 24 | use std::cell::{RefCell, Ref};
[INFO] [stdout]    |                          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Deref`
[INFO] [stdout]   --> src/executors.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 25 | use std::ops::Deref;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `thread1`
[INFO] [stdout]   --> src/main.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let thread1 = spawn(move || {
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_thread1`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `thread2`
[INFO] [stdout]   --> src/main.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 |     let thread2 = spawn(move || {
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_thread2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `env`
[INFO] [stdout]   --> src/main.rs:19:34
[INFO] [stdout]    |
[INFO] [stdout] 19 |         executor1.with_attached(|env| {
[INFO] [stdout]    |                                  ^^^ help: if this is intentional, prefix it with an underscore: `_env`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `env`
[INFO] [stdout]   --> src/main.rs:30:34
[INFO] [stdout]    |
[INFO] [stdout] 30 |         executor2.with_attached(|env| {
[INFO] [stdout]    |                                  ^^^ help: if this is intentional, prefix it with an underscore: `_env`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/executors.rs:124:12
[INFO] [stdout]     |
[INFO] [stdout] 122 | impl DumbExecutor {
[INFO] [stdout]     | ----------------- associated function in this implementation
[INFO] [stdout] 123 |     /// Creates a `DumbExecutor`
[INFO] [stdout] 124 |     pub fn new(vm: Arc<JavaVM>) -> Self {
[INFO] [stdout]     |            ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/executors.rs:242:12
[INFO] [stdout]     |
[INFO] [stdout] 240 | impl MainExecutor {
[INFO] [stdout]     | ----------------- associated function in this implementation
[INFO] [stdout] 241 |     /// Creates a `MainExecutor`
[INFO] [stdout] 242 |     pub fn new(vm: Arc<JavaVM>) -> Self {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 12.60s
[INFO] running `Command { std: "docker" "inspect" "ce6e4c81590490eeabcc1f0c94bf00324de9e5d9447bb5f76bc7f2ff7dc67792", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ce6e4c81590490eeabcc1f0c94bf00324de9e5d9447bb5f76bc7f2ff7dc67792", kill_on_drop: false }`
[INFO] [stdout] ce6e4c81590490eeabcc1f0c94bf00324de9e5d9447bb5f76bc7f2ff7dc67792
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2024-12-08" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5caa04e269ce8eff45cba79a5ad2c3ad6414a6bea1b6a3b5aa7401ebf12da8b7
[INFO] running `Command { std: "docker" "start" "-a" "5caa04e269ce8eff45cba79a5ad2c3ad6414a6bea1b6a3b5aa7401ebf12da8b7", kill_on_drop: false }`
[INFO] [stderr]    Compiling test_detach v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `InitArgs`
[INFO] [stdout]  --> src/main.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use jni::{InitArgs, InitArgsBuilder, JNIVersion};
[INFO] [stdout]   |           ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::mem::forget`
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::mem::forget;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `AttachGuard`
[INFO] [stdout]   --> src/executors.rs:17:27
[INFO] [stdout]    |
[INFO] [stdout] 17 | use jni::{JNIEnv, JavaVM, AttachGuard};
[INFO] [stdout]    |                           ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Ref`
[INFO] [stdout]   --> src/executors.rs:24:26
[INFO] [stdout]    |
[INFO] [stdout] 24 | use std::cell::{RefCell, Ref};
[INFO] [stdout]    |                          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Deref`
[INFO] [stdout]   --> src/executors.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 25 | use std::ops::Deref;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `thread1`
[INFO] [stdout]   --> src/main.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let thread1 = spawn(move || {
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_thread1`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `thread2`
[INFO] [stdout]   --> src/main.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 |     let thread2 = spawn(move || {
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_thread2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `env`
[INFO] [stdout]   --> src/main.rs:19:34
[INFO] [stdout]    |
[INFO] [stdout] 19 |         executor1.with_attached(|env| {
[INFO] [stdout]    |                                  ^^^ help: if this is intentional, prefix it with an underscore: `_env`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `env`
[INFO] [stdout]   --> src/main.rs:30:34
[INFO] [stdout]    |
[INFO] [stdout] 30 |         executor2.with_attached(|env| {
[INFO] [stdout]    |                                  ^^^ help: if this is intentional, prefix it with an underscore: `_env`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/executors.rs:124:12
[INFO] [stdout]     |
[INFO] [stdout] 122 | impl DumbExecutor {
[INFO] [stdout]     | ----------------- associated function in this implementation
[INFO] [stdout] 123 |     /// Creates a `DumbExecutor`
[INFO] [stdout] 124 |     pub fn new(vm: Arc<JavaVM>) -> Self {
[INFO] [stdout]     |            ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/executors.rs:242:12
[INFO] [stdout]     |
[INFO] [stdout] 240 | impl MainExecutor {
[INFO] [stdout]     | ----------------- associated function in this implementation
[INFO] [stdout] 241 |     /// Creates a `MainExecutor`
[INFO] [stdout] 242 |     pub fn new(vm: Arc<JavaVM>) -> Self {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.66s
[INFO] running `Command { std: "docker" "inspect" "5caa04e269ce8eff45cba79a5ad2c3ad6414a6bea1b6a3b5aa7401ebf12da8b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5caa04e269ce8eff45cba79a5ad2c3ad6414a6bea1b6a3b5aa7401ebf12da8b7", kill_on_drop: false }`
[INFO] [stdout] 5caa04e269ce8eff45cba79a5ad2c3ad6414a6bea1b6a3b5aa7401ebf12da8b7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2024-12-08" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] ba236d11b90cfadb262eb9d7b0e10d01e4d1ab0bfc19b79fb50d4235189a7d82
[INFO] running `Command { std: "docker" "start" "-a" "ba236d11b90cfadb262eb9d7b0e10d01e4d1ab0bfc19b79fb50d4235189a7d82", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `InitArgs`
[INFO] [stderr]  --> src/main.rs:1:11
[INFO] [stderr]   |
[INFO] [stderr] 1 | use jni::{InitArgs, InitArgsBuilder, JNIVersion};
[INFO] [stderr]   |           ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::mem::forget`
[INFO] [stderr]  --> src/main.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::mem::forget;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `AttachGuard`
[INFO] [stderr]   --> src/executors.rs:17:27
[INFO] [stderr]    |
[INFO] [stderr] 17 | use jni::{JNIEnv, JavaVM, AttachGuard};
[INFO] [stderr]    |                           ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Ref`
[INFO] [stderr]   --> src/executors.rs:24:26
[INFO] [stderr]    |
[INFO] [stderr] 24 | use std::cell::{RefCell, Ref};
[INFO] [stderr]    |                          ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::ops::Deref`
[INFO] [stderr]   --> src/executors.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 | use std::ops::Deref;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `thread1`
[INFO] [stderr]   --> src/main.rs:18:9
[INFO] [stderr]    |
[INFO] [stderr] 18 |     let thread1 = spawn(move || {
[INFO] [stderr]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_thread1`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `thread2`
[INFO] [stderr]   --> src/main.rs:29:9
[INFO] [stderr]    |
[INFO] [stderr] 29 |     let thread2 = spawn(move || {
[INFO] [stderr]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_thread2`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `env`
[INFO] [stderr]   --> src/main.rs:19:34
[INFO] [stderr]    |
[INFO] [stderr] 19 |         executor1.with_attached(|env| {
[INFO] [stderr]    |                                  ^^^ help: if this is intentional, prefix it with an underscore: `_env`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `env`
[INFO] [stderr]   --> src/main.rs:30:34
[INFO] [stderr]    |
[INFO] [stderr] 30 |         executor2.with_attached(|env| {
[INFO] [stderr]    |                                  ^^^ help: if this is intentional, prefix it with an underscore: `_env`
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `new` is never used
[INFO] [stderr]    --> src/executors.rs:124:12
[INFO] [stderr]     |
[INFO] [stderr] 122 | impl DumbExecutor {
[INFO] [stderr]     | ----------------- associated function in this implementation
[INFO] [stderr] 123 |     /// Creates a `DumbExecutor`
[INFO] [stderr] 124 |     pub fn new(vm: Arc<JavaVM>) -> Self {
[INFO] [stderr]     |            ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `new` is never used
[INFO] [stderr]    --> src/executors.rs:242:12
[INFO] [stderr]     |
[INFO] [stderr] 240 | impl MainExecutor {
[INFO] [stderr]     | ----------------- associated function in this implementation
[INFO] [stderr] 241 |     /// Creates a `MainExecutor`
[INFO] [stderr] 242 |     pub fn new(vm: Arc<JavaVM>) -> Self {
[INFO] [stderr]     |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `test_detach` (bin "test_detach" test) generated 11 warnings (run `cargo fix --bin "test_detach" --tests` to apply 5 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/test_detach-e32d4d1908a4a0f1)
[INFO] [stderr] /opt/rustwide/target/debug/deps/test_detach-e32d4d1908a4a0f1: error while loading shared libraries: libjvm.so: cannot open shared object file: No such file or directory
[INFO] [stderr] error: test failed, to rerun pass `--bin test_detach`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/deps/test_detach-e32d4d1908a4a0f1` (exit status: 127)
[INFO] [stderr] note: test exited abnormally; to see the full output pass --nocapture to the harness.
[INFO] running `Command { std: "docker" "inspect" "ba236d11b90cfadb262eb9d7b0e10d01e4d1ab0bfc19b79fb50d4235189a7d82", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ba236d11b90cfadb262eb9d7b0e10d01e4d1ab0bfc19b79fb50d4235189a7d82", kill_on_drop: false }`
[INFO] [stdout] ba236d11b90cfadb262eb9d7b0e10d01e4d1ab0bfc19b79fb50d4235189a7d82
