Dec 18 04:52:24.921 INFO checking WenjunHuang/SledMultiThreadTest against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 18 04:52:24.921 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-6/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/gh/WenjunHuang/SledMultiThreadTest:/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" "+0b8c5828f68d7b2840b81fa51239346dc97fef5a-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 18 04:52:25.485 INFO [stdout] 2d8d9f66210ef25fff18da8e55e2b2554936c16cd3658fae5a51c262718a474e
Dec 18 04:52:25.492 INFO running `"docker" "start" "-a" "2d8d9f66210ef25fff18da8e55e2b2554936c16cd3658fae5a51c262718a474e"`
Dec 18 04:52:27.048 INFO [stderr]     Checking crossbeam-utils v0.5.0
Dec 18 04:52:27.048 INFO [stderr]     Checking crossbeam-epoch v0.3.1
Dec 18 04:52:27.640 INFO [stderr]     Checking crossbeam-epoch v0.6.0
Dec 18 04:52:28.196 INFO [stderr]     Checking crossbeam-deque v0.2.0
Dec 18 04:52:28.521 INFO [stderr]     Checking pagetable v0.1.0
Dec 18 04:52:29.073 INFO [stderr]     Checking rayon-core v1.4.1
Dec 18 04:52:30.233 INFO [stderr]     Checking rayon v1.0.3
Dec 18 04:52:33.977 INFO [stderr]     Checking pagecache v0.7.2
Dec 18 04:52:37.909 INFO [stderr]     Checking sled v0.16.2
Dec 18 04:52:41.046 INFO [stderr]     Checking SledMultithreadTest v0.1.0 (/opt/crater/workdir)
Dec 18 04:52:42.849 INFO [stderr] warning: unused import: `SubCommand`
Dec 18 04:52:42.849 INFO [stderr]  --> src/main.rs:4:22
Dec 18 04:52:42.849 INFO [stderr]   |
Dec 18 04:52:42.850 INFO [stderr] 4 | use clap::{App, Arg, SubCommand};
Dec 18 04:52:42.850 INFO [stderr]   |                      ^^^^^^^^^^
Dec 18 04:52:42.850 INFO [stderr]   |
Dec 18 04:52:42.851 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 18 04:52:42.851 INFO [stderr] 
Dec 18 04:52:43.022 INFO [stderr] warning: unused variable: `prefix`
Dec 18 04:52:43.022 INFO [stderr]   --> src/main.rs:62:31
Dec 18 04:52:43.022 INFO [stderr]    |
Dec 18 04:52:43.022 INFO [stderr] 62 | fn check_write(db: Arc<Tree>, prefix: i32) {
Dec 18 04:52:43.023 INFO [stderr]    |                               ^^^^^^ help: consider using `_prefix` instead
Dec 18 04:52:43.023 INFO [stderr]    |
Dec 18 04:52:43.023 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 18 04:52:43.023 INFO [stderr] 
Dec 18 04:52:43.024 INFO [stderr] warning: unused variable: `prefix`
Dec 18 04:52:43.024 INFO [stderr]   --> src/main.rs:89:30
Dec 18 04:52:43.024 INFO [stderr]    |
Dec 18 04:52:43.025 INFO [stderr] 89 | fn check_read(db: Arc<Tree>, prefix: i32) {
Dec 18 04:52:43.025 INFO [stderr]    |                              ^^^^^^ help: consider using `_prefix` instead
Dec 18 04:52:43.025 INFO [stderr] 
Dec 18 04:52:43.068 INFO [stderr] warning: crate `SledMultithreadTest` should have a snake case name such as `sled_multithread_test`
Dec 18 04:52:43.069 INFO [stderr]   |
Dec 18 04:52:43.069 INFO [stderr]   = note: #[warn(non_snake_case)] on by default
Dec 18 04:52:43.069 INFO [stderr] 
Dec 18 04:52:43.136 INFO [stderr] warning: unused import: `SubCommand`
Dec 18 04:52:43.136 INFO [stderr]  --> src/main.rs:4:22
Dec 18 04:52:43.136 INFO [stderr]   |
Dec 18 04:52:43.136 INFO [stderr] 4 | use clap::{App, Arg, SubCommand};
Dec 18 04:52:43.136 INFO [stderr]   |                      ^^^^^^^^^^
Dec 18 04:52:43.136 INFO [stderr]   |
Dec 18 04:52:43.137 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 18 04:52:43.137 INFO [stderr] 
Dec 18 04:52:43.299 INFO [stderr] warning: unused variable: `prefix`
Dec 18 04:52:43.300 INFO [stderr]   --> src/main.rs:62:31
Dec 18 04:52:43.300 INFO [stderr]    |
Dec 18 04:52:43.300 INFO [stderr] 62 | fn check_write(db: Arc<Tree>, prefix: i32) {
Dec 18 04:52:43.300 INFO [stderr]    |                               ^^^^^^ help: consider using `_prefix` instead
Dec 18 04:52:43.300 INFO [stderr]    |
Dec 18 04:52:43.300 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 18 04:52:43.300 INFO [stderr] 
Dec 18 04:52:43.300 INFO [stderr] warning: unused variable: `prefix`
Dec 18 04:52:43.300 INFO [stderr]   --> src/main.rs:89:30
Dec 18 04:52:43.300 INFO [stderr]    |
Dec 18 04:52:43.300 INFO [stderr] 89 | fn check_read(db: Arc<Tree>, prefix: i32) {
Dec 18 04:52:43.300 INFO [stderr]    |                              ^^^^^^ help: consider using `_prefix` instead
Dec 18 04:52:43.300 INFO [stderr] 
Dec 18 04:52:43.336 INFO [stderr] warning: crate `SledMultithreadTest` should have a snake case name such as `sled_multithread_test`
Dec 18 04:52:43.336 INFO [stderr]   |
Dec 18 04:52:43.336 INFO [stderr]   = note: #[warn(non_snake_case)] on by default
Dec 18 04:52:43.336 INFO [stderr] 
Dec 18 04:52:43.373 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 16.45s
Dec 18 04:52:45.048 INFO running `"docker" "inspect" "2d8d9f66210ef25fff18da8e55e2b2554936c16cd3658fae5a51c262718a474e"`
Dec 18 04:52:45.410 INFO running `"docker" "rm" "-f" "2d8d9f66210ef25fff18da8e55e2b2554936c16cd3658fae5a51c262718a474e"`
Dec 18 04:52:45.676 INFO [stdout] 2d8d9f66210ef25fff18da8e55e2b2554936c16cd3658fae5a51c262718a474e