[INFO] updating cached repository WenjunHuang/SledMultiThreadTest
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/WenjunHuang/SledMultiThreadTest
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/WenjunHuang/SledMultiThreadTest" "work/ex/pr-57745/sources/master#f613dc138b4012cf3d2eb40718fbcc7cf0a34039/gh/WenjunHuang/SledMultiThreadTest"`
[INFO] [stderr] Cloning into 'work/ex/pr-57745/sources/master#f613dc138b4012cf3d2eb40718fbcc7cf0a34039/gh/WenjunHuang/SledMultiThreadTest'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/WenjunHuang/SledMultiThreadTest" "work/ex/pr-57745/sources/try#29640c57b5f92febba0e40c50cb863c9a7ede51d/gh/WenjunHuang/SledMultiThreadTest"`
[INFO] [stderr] Cloning into 'work/ex/pr-57745/sources/try#29640c57b5f92febba0e40c50cb863c9a7ede51d/gh/WenjunHuang/SledMultiThreadTest'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a6fa19f409ad4b6f51d8cdb5fafe78f08e09b0fc
[INFO] sha for GitHub repo WenjunHuang/SledMultiThreadTest: a6fa19f409ad4b6f51d8cdb5fafe78f08e09b0fc
[INFO] validating manifest of WenjunHuang/SledMultiThreadTest on toolchain master#f613dc138b4012cf3d2eb40718fbcc7cf0a34039
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+f613dc138b4012cf3d2eb40718fbcc7cf0a34039-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of WenjunHuang/SledMultiThreadTest on toolchain try#29640c57b5f92febba0e40c50cb863c9a7ede51d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+29640c57b5f92febba0e40c50cb863c9a7ede51d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing WenjunHuang/SledMultiThreadTest
[INFO] finished frobbing WenjunHuang/SledMultiThreadTest
[INFO] frobbed toml for WenjunHuang/SledMultiThreadTest written to work/ex/pr-57745/sources/master#f613dc138b4012cf3d2eb40718fbcc7cf0a34039/gh/WenjunHuang/SledMultiThreadTest/Cargo.toml
[INFO] started frobbing WenjunHuang/SledMultiThreadTest
[INFO] finished frobbing WenjunHuang/SledMultiThreadTest
[INFO] frobbed toml for WenjunHuang/SledMultiThreadTest written to work/ex/pr-57745/sources/try#29640c57b5f92febba0e40c50cb863c9a7ede51d/gh/WenjunHuang/SledMultiThreadTest/Cargo.toml
[INFO] crate WenjunHuang/SledMultiThreadTest has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+f613dc138b4012cf3d2eb40718fbcc7cf0a34039-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+29640c57b5f92febba0e40c50cb863c9a7ede51d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking WenjunHuang/SledMultiThreadTest against master#f613dc138b4012cf3d2eb40718fbcc7cf0a34039 for pr-57745
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57745/worker-6/master#f613dc138b4012cf3d2eb40718fbcc7cf0a34039:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57745/sources/master#f613dc138b4012cf3d2eb40718fbcc7cf0a34039/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" "+f613dc138b4012cf3d2eb40718fbcc7cf0a34039-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 53205d351c1f4b5e55bd7b98a48cc25f762a78fa63be9bc5059a76a25632153f
[INFO] running `"docker" "start" "-a" "53205d351c1f4b5e55bd7b98a48cc25f762a78fa63be9bc5059a76a25632153f"`
[INFO] [stderr]     Checking crossbeam-utils v0.5.0
[INFO] [stderr]     Checking coco v0.2.1
[INFO] [stderr]     Checking crossbeam-epoch v0.3.1
[INFO] [stderr]     Checking crossbeam-epoch v0.6.0
[INFO] [stderr]     Checking historian v3.0.4
[INFO] [stderr]     Checking crossbeam-deque v0.2.0
[INFO] [stderr]     Checking pagetable v0.1.0
[INFO] [stderr]     Checking rayon-core v1.4.1
[INFO] [stderr]     Checking rayon v1.0.3
[INFO] [stderr]     Checking pagecache v0.7.2
[INFO] [stderr]     Checking sled v0.16.2
[INFO] [stderr]     Checking SledMultithreadTest v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `SubCommand`
[INFO] [stderr]  --> src/main.rs:4:22
[INFO] [stderr]   |
[INFO] [stderr] 4 | use clap::{App, Arg, SubCommand};
[INFO] [stderr]   |                      ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `SubCommand`
[INFO] [stderr]  --> src/main.rs:4:22
[INFO] [stderr]   |
[INFO] [stderr] 4 | use clap::{App, Arg, SubCommand};
[INFO] [stderr]   |                      ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `prefix`
[INFO] [stderr]   --> src/main.rs:62:31
[INFO] [stderr]    |
[INFO] [stderr] 62 | fn check_write(db: Arc<Tree>, prefix: i32) {
[INFO] [stderr]    |                               ^^^^^^ help: consider using `_prefix` instead
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `prefix`
[INFO] [stderr]   --> src/main.rs:89:30
[INFO] [stderr]    |
[INFO] [stderr] 89 | fn check_read(db: Arc<Tree>, prefix: i32) {
[INFO] [stderr]    |                              ^^^^^^ help: consider using `_prefix` instead
[INFO] [stderr] 
[INFO] [stderr] warning: crate `SledMultithreadTest` should have a snake case name
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(non_snake_case)] on by default
[INFO] [stderr]   = help: convert the identifier to snake case: `sled_multithread_test`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `prefix`
[INFO] [stderr]   --> src/main.rs:62:31
[INFO] [stderr]    |
[INFO] [stderr] 62 | fn check_write(db: Arc<Tree>, prefix: i32) {
[INFO] [stderr]    |                               ^^^^^^ help: consider using `_prefix` instead
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `prefix`
[INFO] [stderr]   --> src/main.rs:89:30
[INFO] [stderr]    |
[INFO] [stderr] 89 | fn check_read(db: Arc<Tree>, prefix: i32) {
[INFO] [stderr]    |                              ^^^^^^ help: consider using `_prefix` instead
[INFO] [stderr] 
[INFO] [stderr] warning: crate `SledMultithreadTest` should have a snake case name
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(non_snake_case)] on by default
[INFO] [stderr]   = help: convert the identifier to snake case: `sled_multithread_test`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 16.69s
[INFO] running `"docker" "inspect" "53205d351c1f4b5e55bd7b98a48cc25f762a78fa63be9bc5059a76a25632153f"`
[INFO] running `"docker" "rm" "-f" "53205d351c1f4b5e55bd7b98a48cc25f762a78fa63be9bc5059a76a25632153f"`
[INFO] [stdout] 53205d351c1f4b5e55bd7b98a48cc25f762a78fa63be9bc5059a76a25632153f