Dec 11 23:35:47.686 INFO checking WenjunHuang/SledMultiThreadTest against master#3a75e80557a103497cffbcab395a2f37061a77ea for pr-56677
Dec 11 23:35:47.686 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-4/master#3a75e80557a103497cffbcab395a2f37061a77ea:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-56677/master#3a75e80557a103497cffbcab395a2f37061a77ea:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +3a75e80557a103497cffbcab395a2f37061a77ea-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 11 23:35:48.472 INFO [stdout] 08af1e6a9fa0ea19eae49cb6cfe66edf1f4ac1d3f5361b0e4634da766b8e170e
Dec 11 23:35:48.474 INFO running `"docker" "start" "-a" "08af1e6a9fa0ea19eae49cb6cfe66edf1f4ac1d3f5361b0e4634da766b8e170e"`
Dec 11 23:35:50.495 INFO [stderr] usermod: no changes
Dec 11 23:35:50.644 INFO [stderr]     Checking crossbeam-utils v0.5.0
Dec 11 23:35:50.644 INFO [stderr]     Checking crossbeam-epoch v0.3.1
Dec 11 23:35:51.228 INFO [stderr]     Checking crossbeam-epoch v0.6.0
Dec 11 23:35:51.808 INFO [stderr]     Checking crossbeam-deque v0.2.0
Dec 11 23:35:52.460 INFO [stderr]     Checking pagetable v0.1.0
Dec 11 23:35:52.972 INFO [stderr]     Checking rayon-core v1.4.1
Dec 11 23:35:54.492 INFO [stderr]     Checking rayon v1.0.3
Dec 11 23:35:58.447 INFO [stderr]     Checking pagecache v0.7.2
Dec 11 23:36:02.762 INFO [stderr]     Checking sled v0.16.2
Dec 11 23:36:06.794 INFO [stderr]     Checking SledMultithreadTest v0.1.0 (/source)
Dec 11 23:36:10.572 INFO [stderr] warning: unused import: `SubCommand`
Dec 11 23:36:10.572 INFO [stderr]  --> src/main.rs:4:22
Dec 11 23:36:10.572 INFO [stderr]   |
Dec 11 23:36:10.572 INFO [stderr] 4 | use clap::{App, Arg, SubCommand};
Dec 11 23:36:10.573 INFO [stderr]   |                      ^^^^^^^^^^
Dec 11 23:36:10.573 INFO [stderr]   |
Dec 11 23:36:10.573 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 11 23:36:10.573 INFO [stderr] 
Dec 11 23:36:10.664 INFO [stderr] warning: unused import: `SubCommand`
Dec 11 23:36:10.664 INFO [stderr]  --> src/main.rs:4:22
Dec 11 23:36:10.664 INFO [stderr]   |
Dec 11 23:36:10.664 INFO [stderr] 4 | use clap::{App, Arg, SubCommand};
Dec 11 23:36:10.664 INFO [stderr]   |                      ^^^^^^^^^^
Dec 11 23:36:10.664 INFO [stderr]   |
Dec 11 23:36:10.664 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 11 23:36:10.664 INFO [stderr] 
Dec 11 23:36:10.764 INFO [stderr] warning: unused variable: `prefix`
Dec 11 23:36:10.764 INFO [stderr]   --> src/main.rs:62:31
Dec 11 23:36:10.764 INFO [stderr]    |
Dec 11 23:36:10.764 INFO [stderr] 62 | fn check_write(db: Arc<Tree>, prefix: i32) {
Dec 11 23:36:10.764 INFO [stderr]    |                               ^^^^^^ help: consider using `_prefix` instead
Dec 11 23:36:10.764 INFO [stderr]    |
Dec 11 23:36:10.764 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 11 23:36:10.764 INFO [stderr] 
Dec 11 23:36:10.768 INFO [stderr] warning: unused variable: `prefix`
Dec 11 23:36:10.768 INFO [stderr]   --> src/main.rs:89:30
Dec 11 23:36:10.768 INFO [stderr]    |
Dec 11 23:36:10.768 INFO [stderr] 89 | fn check_read(db: Arc<Tree>, prefix: i32) {
Dec 11 23:36:10.768 INFO [stderr]    |                              ^^^^^^ help: consider using `_prefix` instead
Dec 11 23:36:10.768 INFO [stderr] 
Dec 11 23:36:10.768 INFO [stderr] warning: unused variable: `prefix`
Dec 11 23:36:10.768 INFO [stderr]   --> src/main.rs:62:31
Dec 11 23:36:10.768 INFO [stderr]    |
Dec 11 23:36:10.772 INFO [stderr] 62 | fn check_write(db: Arc<Tree>, prefix: i32) {
Dec 11 23:36:10.772 INFO [stderr]    |                               ^^^^^^ help: consider using `_prefix` instead
Dec 11 23:36:10.772 INFO [stderr]    |
Dec 11 23:36:10.772 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 11 23:36:10.772 INFO [stderr] 
Dec 11 23:36:10.772 INFO [stderr] warning: unused variable: `prefix`
Dec 11 23:36:10.772 INFO [stderr]   --> src/main.rs:89:30
Dec 11 23:36:10.772 INFO [stderr]    |
Dec 11 23:36:10.772 INFO [stderr] 89 | fn check_read(db: Arc<Tree>, prefix: i32) {
Dec 11 23:36:10.772 INFO [stderr]    |                              ^^^^^^ help: consider using `_prefix` instead
Dec 11 23:36:10.772 INFO [stderr] 
Dec 11 23:36:10.808 INFO [stderr] warning: crate `SledMultithreadTest` should have a snake case name such as `sled_multithread_test`
Dec 11 23:36:10.808 INFO [stderr]   |
Dec 11 23:36:10.808 INFO [stderr]   = note: #[warn(non_snake_case)] on by default
Dec 11 23:36:10.808 INFO [stderr] 
Dec 11 23:36:10.814 INFO [stderr] warning: crate `SledMultithreadTest` should have a snake case name such as `sled_multithread_test`
Dec 11 23:36:10.814 INFO [stderr]   |
Dec 11 23:36:10.814 INFO [stderr]   = note: #[warn(non_snake_case)] on by default
Dec 11 23:36:10.814 INFO [stderr] 
Dec 11 23:36:10.888 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 20.37s
Dec 11 23:36:10.896 INFO [stderr] su: No module specific data is present
Dec 11 23:36:11.510 INFO running `"docker" "inspect" "08af1e6a9fa0ea19eae49cb6cfe66edf1f4ac1d3f5361b0e4634da766b8e170e"`
Dec 11 23:36:11.760 INFO running `"docker" "rm" "-f" "08af1e6a9fa0ea19eae49cb6cfe66edf1f4ac1d3f5361b0e4634da766b8e170e"`
Dec 11 23:36:11.960 INFO [stdout] 08af1e6a9fa0ea19eae49cb6cfe66edf1f4ac1d3f5361b0e4634da766b8e170e