[INFO] updating cached repository onehr/dbrs
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/onehr/dbrs
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/onehr/dbrs" "work/ex/beta-1.38-1/sources/1.37.0/gh/onehr/dbrs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/onehr/dbrs'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/onehr/dbrs" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/onehr/dbrs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/onehr/dbrs'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] e75e2803fb3b3449f593611195011a8dd6297eee
[INFO] sha for GitHub repo onehr/dbrs: e75e2803fb3b3449f593611195011a8dd6297eee
[INFO] validating manifest of onehr/dbrs 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 onehr/dbrs 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 onehr/dbrs
[INFO] finished frobbing onehr/dbrs
[INFO] frobbed toml for onehr/dbrs written to work/ex/beta-1.38-1/sources/1.37.0/gh/onehr/dbrs/Cargo.toml
[INFO] started frobbing onehr/dbrs
[INFO] finished frobbing onehr/dbrs
[INFO] frobbed toml for onehr/dbrs written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/onehr/dbrs/Cargo.toml
[INFO] crate onehr/dbrs 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing onehr/dbrs 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-2/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/onehr/dbrs:/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] 148f3f5c3a5129a0fe0d50467931629738dc9e95969a77f318d7aa8cbc252dea
[INFO] running `"docker" "start" "-a" "148f3f5c3a5129a0fe0d50467931629738dc9e95969a77f318d7aa8cbc252dea"`
[INFO] [stderr]    Compiling linenoise-rust v0.2.1
[INFO] [stderr]    Compiling nix v0.13.0
[INFO] [stderr]    Compiling dbrs v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/debugger.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 |     let mut ret: Vec<&str>;
[INFO] [stderr]    |         ----^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 12.54s
[INFO] running `"docker" "inspect" "148f3f5c3a5129a0fe0d50467931629738dc9e95969a77f318d7aa8cbc252dea"`
[INFO] running `"docker" "rm" "-f" "148f3f5c3a5129a0fe0d50467931629738dc9e95969a77f318d7aa8cbc252dea"`
[INFO] [stdout] 148f3f5c3a5129a0fe0d50467931629738dc9e95969a77f318d7aa8cbc252dea
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/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/onehr/dbrs:/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" "test" "--frozen" "--no-run"`
[INFO] [stdout] cd34c7ef5504b7cf4f80e0ac1c865b5535f0018354e247c8f1ba14240ef13d6c
[INFO] running `"docker" "start" "-a" "cd34c7ef5504b7cf4f80e0ac1c865b5535f0018354e247c8f1ba14240ef13d6c"`
[INFO] [stderr]    Compiling dbrs v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/debugger.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 |     let mut ret: Vec<&str>;
[INFO] [stderr]    |         ----^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.07s
[INFO] running `"docker" "inspect" "cd34c7ef5504b7cf4f80e0ac1c865b5535f0018354e247c8f1ba14240ef13d6c"`
[INFO] running `"docker" "rm" "-f" "cd34c7ef5504b7cf4f80e0ac1c865b5535f0018354e247c8f1ba14240ef13d6c"`
[INFO] [stdout] cd34c7ef5504b7cf4f80e0ac1c865b5535f0018354e247c8f1ba14240ef13d6c
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/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/onehr/dbrs:/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" "test" "--frozen"`
[INFO] [stdout] 0bad3c6dd83bccfb1b9b386f356c9c89105bf6ac076aa2fd98c25cb6439be34a
[INFO] running `"docker" "start" "-a" "0bad3c6dd83bccfb1b9b386f356c9c89105bf6ac076aa2fd98c25cb6439be34a"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/dbrs-2528914ad319011a
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "0bad3c6dd83bccfb1b9b386f356c9c89105bf6ac076aa2fd98c25cb6439be34a"`
[INFO] running `"docker" "rm" "-f" "0bad3c6dd83bccfb1b9b386f356c9c89105bf6ac076aa2fd98c25cb6439be34a"`
[INFO] [stdout] 0bad3c6dd83bccfb1b9b386f356c9c89105bf6ac076aa2fd98c25cb6439be34a