[INFO] updating cached repository ChristianBell1995/rust_functions
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ChristianBell1995/rust_functions
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ChristianBell1995/rust_functions" "work/ex/beta-1.38-1/sources/1.37.0/gh/ChristianBell1995/rust_functions"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/ChristianBell1995/rust_functions'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ChristianBell1995/rust_functions" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ChristianBell1995/rust_functions"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ChristianBell1995/rust_functions'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 2a7e287cc4842ab8dab40352c62c4f1e5dc893c4
[INFO] sha for GitHub repo ChristianBell1995/rust_functions: 2a7e287cc4842ab8dab40352c62c4f1e5dc893c4
[INFO] validating manifest of ChristianBell1995/rust_functions 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 ChristianBell1995/rust_functions 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 ChristianBell1995/rust_functions
[INFO] finished frobbing ChristianBell1995/rust_functions
[INFO] frobbed toml for ChristianBell1995/rust_functions written to work/ex/beta-1.38-1/sources/1.37.0/gh/ChristianBell1995/rust_functions/Cargo.toml
[INFO] started frobbing ChristianBell1995/rust_functions
[INFO] finished frobbing ChristianBell1995/rust_functions
[INFO] frobbed toml for ChristianBell1995/rust_functions written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ChristianBell1995/rust_functions/Cargo.toml
[INFO] crate ChristianBell1995/rust_functions 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 ChristianBell1995/rust_functions against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/ChristianBell1995/rust_functions:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 90d1a856c9e9edb1e0afee9469432bcf7c030889f97409952863036435252a7c
[INFO] running `"docker" "start" "-a" "90d1a856c9e9edb1e0afee9469432bcf7c030889f97409952863036435252a7c"`
[INFO] [stderr]    Compiling rust_functions v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]  --> src/main.rs:2:9
[INFO] [stderr]   |
[INFO] [stderr] 2 |     let x = 5;
[INFO] [stderr]   |         ^ help: consider prefixing with an underscore: `_x`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.25s
[INFO] running `"docker" "inspect" "90d1a856c9e9edb1e0afee9469432bcf7c030889f97409952863036435252a7c"`
[INFO] running `"docker" "rm" "-f" "90d1a856c9e9edb1e0afee9469432bcf7c030889f97409952863036435252a7c"`
[INFO] [stdout] 90d1a856c9e9edb1e0afee9469432bcf7c030889f97409952863036435252a7c
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/ChristianBell1995/rust_functions:/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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] fe61808974f329e027355a6bae7e5b919495808469bc870a9e4431490abab72f
[INFO] running `"docker" "start" "-a" "fe61808974f329e027355a6bae7e5b919495808469bc870a9e4431490abab72f"`
[INFO] [stderr]    Compiling rust_functions v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]  --> src/main.rs:2:9
[INFO] [stderr]   |
[INFO] [stderr] 2 |     let x = 5;
[INFO] [stderr]   |         ^ help: consider prefixing with an underscore: `_x`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.38s
[INFO] running `"docker" "inspect" "fe61808974f329e027355a6bae7e5b919495808469bc870a9e4431490abab72f"`
[INFO] running `"docker" "rm" "-f" "fe61808974f329e027355a6bae7e5b919495808469bc870a9e4431490abab72f"`
[INFO] [stdout] fe61808974f329e027355a6bae7e5b919495808469bc870a9e4431490abab72f
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/ChristianBell1995/rust_functions:/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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] 337b2ec4e8c3e91df4fe2b039beed96eb4cb05c4f1ebf3f790f6347cf9a36846
[INFO] running `"docker" "start" "-a" "337b2ec4e8c3e91df4fe2b039beed96eb4cb05c4f1ebf3f790f6347cf9a36846"`
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stdout] running 0 tests
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rust_functions-0bd6218428260c50
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "337b2ec4e8c3e91df4fe2b039beed96eb4cb05c4f1ebf3f790f6347cf9a36846"`
[INFO] running `"docker" "rm" "-f" "337b2ec4e8c3e91df4fe2b039beed96eb4cb05c4f1ebf3f790f6347cf9a36846"`
[INFO] [stdout] 337b2ec4e8c3e91df4fe2b039beed96eb4cb05c4f1ebf3f790f6347cf9a36846