[INFO] updating cached repository swarnimarun/learning-rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/swarnimarun/learning-rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/swarnimarun/learning-rust" "work/ex/beta-1.38-1/sources/1.37.0/gh/swarnimarun/learning-rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/swarnimarun/learning-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/swarnimarun/learning-rust" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/swarnimarun/learning-rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/swarnimarun/learning-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 758c3e0d6c3d335564a044ce51392749518a2b73
[INFO] sha for GitHub repo swarnimarun/learning-rust: 758c3e0d6c3d335564a044ce51392749518a2b73
[INFO] validating manifest of swarnimarun/learning-rust 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 swarnimarun/learning-rust 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 swarnimarun/learning-rust
[INFO] finished frobbing swarnimarun/learning-rust
[INFO] frobbed toml for swarnimarun/learning-rust written to work/ex/beta-1.38-1/sources/1.37.0/gh/swarnimarun/learning-rust/Cargo.toml
[INFO] started frobbing swarnimarun/learning-rust
[INFO] finished frobbing swarnimarun/learning-rust
[INFO] frobbed toml for swarnimarun/learning-rust written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/swarnimarun/learning-rust/Cargo.toml
[INFO] crate swarnimarun/learning-rust 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 swarnimarun/learning-rust 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-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/swarnimarun/learning-rust:/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] 2cb42833e4851e36c7468a690513a91393c767ed05d8fce31ac33eae0a56463f
[INFO] running `"docker" "start" "-a" "2cb42833e4851e36c7468a690513a91393c767ed05d8fce31ac33eae0a56463f"`
[INFO] [stderr]    Compiling learning-rust v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.33s
[INFO] running `"docker" "inspect" "2cb42833e4851e36c7468a690513a91393c767ed05d8fce31ac33eae0a56463f"`
[INFO] running `"docker" "rm" "-f" "2cb42833e4851e36c7468a690513a91393c767ed05d8fce31ac33eae0a56463f"`
[INFO] [stdout] 2cb42833e4851e36c7468a690513a91393c767ed05d8fce31ac33eae0a56463f
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/swarnimarun/learning-rust:/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] e88384a5b7b788f2742a522b588fa3bf75b988b1f1e0150599b9bfd1d416bb7f
[INFO] running `"docker" "start" "-a" "e88384a5b7b788f2742a522b588fa3bf75b988b1f1e0150599b9bfd1d416bb7f"`
[INFO] [stderr]    Compiling learning-rust v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.55s
[INFO] running `"docker" "inspect" "e88384a5b7b788f2742a522b588fa3bf75b988b1f1e0150599b9bfd1d416bb7f"`
[INFO] running `"docker" "rm" "-f" "e88384a5b7b788f2742a522b588fa3bf75b988b1f1e0150599b9bfd1d416bb7f"`
[INFO] [stdout] e88384a5b7b788f2742a522b588fa3bf75b988b1f1e0150599b9bfd1d416bb7f
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/swarnimarun/learning-rust:/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] 264bd0fa05c6d8acbb2fba0fd0e8fc9ed40bc7e04195538cd969c2cec4c1f64f
[INFO] running `"docker" "start" "-a" "264bd0fa05c6d8acbb2fba0fd0e8fc9ed40bc7e04195538cd969c2cec4c1f64f"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/learning_rust-667f8aaa7937ac71
[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" "264bd0fa05c6d8acbb2fba0fd0e8fc9ed40bc7e04195538cd969c2cec4c1f64f"`
[INFO] running `"docker" "rm" "-f" "264bd0fa05c6d8acbb2fba0fd0e8fc9ed40bc7e04195538cd969c2cec4c1f64f"`
[INFO] [stdout] 264bd0fa05c6d8acbb2fba0fd0e8fc9ed40bc7e04195538cd969c2cec4c1f64f