[INFO] updating cached repository zhuguoliang/rLSM
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/zhuguoliang/rLSM
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/zhuguoliang/rLSM" "work/ex/beta-1.38-1/sources/1.37.0/gh/zhuguoliang/rLSM"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/zhuguoliang/rLSM'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/zhuguoliang/rLSM" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/zhuguoliang/rLSM"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/zhuguoliang/rLSM'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] aa2da0671634c95ff0d630d0b43147434ec7c062
[INFO] sha for GitHub repo zhuguoliang/rLSM: aa2da0671634c95ff0d630d0b43147434ec7c062
[INFO] validating manifest of zhuguoliang/rLSM on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of zhuguoliang/rLSM on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing zhuguoliang/rLSM
[INFO] finished frobbing zhuguoliang/rLSM
[INFO] frobbed toml for zhuguoliang/rLSM written to work/ex/beta-1.38-1/sources/1.37.0/gh/zhuguoliang/rLSM/Cargo.toml
[INFO] started frobbing zhuguoliang/rLSM
[INFO] finished frobbing zhuguoliang/rLSM
[INFO] frobbed toml for zhuguoliang/rLSM written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/zhuguoliang/rLSM/Cargo.toml
[INFO] crate zhuguoliang/rLSM already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing zhuguoliang/rLSM against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/zhuguoliang/rLSM:/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=warn" "-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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] c22233eacc83fd7cae2191e80bfe46cae220f2e952e7e01c3252c13cc89f8330
[INFO] running `"docker" "start" "-a" "c22233eacc83fd7cae2191e80bfe46cae220f2e952e7e01c3252c13cc89f8330"`
[INFO] [stderr]    Compiling rand_core v0.4.0 (https://github.com/rust-random/rand#73ef869e)
[INFO] [stderr]    Compiling bit-vec v0.5.0
[INFO] [stderr]    Compiling rand_pcg v0.1.2 (https://github.com/rust-random/rand#73ef869e)
[INFO] [stderr]    Compiling rand v0.6.5 (https://github.com/rust-random/rand#73ef869e)
[INFO] [stderr]    Compiling getrandom v0.1.1
[INFO] [stderr]    Compiling rand_hc v0.1.0 (https://github.com/rust-random/rand#73ef869e)
[INFO] [stderr]    Compiling database_rust v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(test)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `rand::thread_rng`
[INFO] [stderr]  --> src/bloom_filter.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use rand::thread_rng;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `rand::Rng`
[INFO] [stderr]  --> src/bloom_filter.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use rand::Rng;
[INFO] [stderr]   |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `bit_vec::BitVec`
[INFO] [stderr]  --> src/bloom_filter.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use bit_vec::BitVec;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `test::Bencher`
[INFO] [stderr]  --> src/component.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use test::Bencher;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fs::File`
[INFO] [stderr]  --> src/lsm.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::fs::File;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fs`
[INFO] [stderr]  --> src/lsm.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::fs;
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io`
[INFO] [stderr]  --> src/lsm.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::io;
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `test::Bencher`
[INFO] [stderr]  --> src/lsm.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use test::Bencher;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `helper`
[INFO] [stderr]  --> src/lsm.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use helper;
[INFO] [stderr]   |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `rand::Rng`
[INFO] [stderr]   --> src/lsm.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 | use rand::Rng;
[INFO] [stderr]    |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type `LSM_tree` should have an upper camel case name
[INFO] [stderr]   --> src/lsm.rs:17:12
[INFO] [stderr]    |
[INFO] [stderr] 17 | pub struct LSM_tree{
[INFO] [stderr]    |            ^^^^^^^^ help: convert the identifier to upper camel case: `LsmTree`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `database_rust`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "c22233eacc83fd7cae2191e80bfe46cae220f2e952e7e01c3252c13cc89f8330"`
[INFO] running `"docker" "rm" "-f" "c22233eacc83fd7cae2191e80bfe46cae220f2e952e7e01c3252c13cc89f8330"`
[INFO] [stdout] c22233eacc83fd7cae2191e80bfe46cae220f2e952e7e01c3252c13cc89f8330