[INFO] updating cached repository vitvakatu/test_attach
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/vitvakatu/test_attach
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/vitvakatu/test_attach" "work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/vitvakatu/test_attach"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/vitvakatu/test_attach'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/vitvakatu/test_attach" "work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/vitvakatu/test_attach"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/vitvakatu/test_attach'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d1d1d104d4375f96df0efc94b63a81ffe1c69489
[INFO] sha for GitHub repo vitvakatu/test_attach: d1d1d104d4375f96df0efc94b63a81ffe1c69489
[INFO] validating manifest of vitvakatu/test_attach on toolchain master#435236b8877cdb98c82eaebfb7887782277265c5
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of vitvakatu/test_attach on toolchain try#b5c7f157c20453dde8d47371abe73b32351b4e7f
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing vitvakatu/test_attach
[INFO] finished frobbing vitvakatu/test_attach
[INFO] frobbed toml for vitvakatu/test_attach written to work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/vitvakatu/test_attach/Cargo.toml
[INFO] started frobbing vitvakatu/test_attach
[INFO] finished frobbing vitvakatu/test_attach
[INFO] frobbed toml for vitvakatu/test_attach written to work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/vitvakatu/test_attach/Cargo.toml
[INFO] crate vitvakatu/test_attach already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] checking vitvakatu/test_attach against try#b5c7f157c20453dde8d47371abe73b32351b4e7f for pr-62849
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62849/worker-7/try#b5c7f157c20453dde8d47371abe73b32351b4e7f:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/vitvakatu/test_attach:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] cc900f8fe752e4996956cd9951a428a48f6ee01b8772624d7841abbe964f5396
[INFO] running `"docker" "start" "-a" "cc900f8fe752e4996956cd9951a428a48f6ee01b8772624d7841abbe964f5396"`
[INFO] [stderr]    Compiling libc v0.2.55
[INFO] [stderr]    Compiling byteorder v1.3.1
[INFO] [stderr]     Checking jni-sys v0.3.0
[INFO] [stderr]     Checking cesu8 v1.1.0
[INFO] [stderr]    Compiling backtrace v0.3.20
[INFO] [stderr]    Compiling error-chain v0.12.1
[INFO] [stderr]    Compiling jni v0.12.2
[INFO] [stderr]     Checking combine v3.8.1
[INFO] [stderr]     Checking backtrace-sys v0.1.28
[INFO] [stderr]     Checking test_detach v0.1.0 (/opt/crater/workdir)
[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 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: `env`
[INFO] [stderr]   --> src/main.rs:19:34
[INFO] [stderr]    |
[INFO] [stderr] 19 |         executor1.with_attached(|env| {
[INFO] [stderr]    |                                  ^^^ help: consider prefixing with an underscore: `_env`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[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: consider prefixing with an underscore: `_env`
[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: consider prefixing with an underscore: `_thread1`
[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: consider prefixing 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: consider prefixing with an underscore: `_env`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[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: consider prefixing with an underscore: `_env`
[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: consider prefixing with an underscore: `_thread1`
[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: consider prefixing with an underscore: `_thread2`
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]    --> src/executors.rs:124:5
[INFO] [stderr]     |
[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: method is never used: `new`
[INFO] [stderr]    --> src/executors.rs:242:5
[INFO] [stderr]     |
[INFO] [stderr] 242 |     pub fn new(vm: Arc<JavaVM>) -> Self {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]    --> src/executors.rs:124:5
[INFO] [stderr]     |
[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: method is never used: `new`
[INFO] [stderr]    --> src/executors.rs:242:5
[INFO] [stderr]     |
[INFO] [stderr] 242 |     pub fn new(vm: Arc<JavaVM>) -> Self {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 29.22s
[INFO] running `"docker" "inspect" "cc900f8fe752e4996956cd9951a428a48f6ee01b8772624d7841abbe964f5396"`
[INFO] running `"docker" "rm" "-f" "cc900f8fe752e4996956cd9951a428a48f6ee01b8772624d7841abbe964f5396"`
[INFO] [stdout] cc900f8fe752e4996956cd9951a428a48f6ee01b8772624d7841abbe964f5396