[INFO] updating cached repository MindFlavor/bpb
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/MindFlavor/bpb
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/MindFlavor/bpb" "work/ex/beta-1.38-1/sources/1.37.0/gh/MindFlavor/bpb"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/MindFlavor/bpb'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/MindFlavor/bpb" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/MindFlavor/bpb"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/MindFlavor/bpb'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 3b384ae9b753379332855654a28f4091a751f89e
[INFO] sha for GitHub repo MindFlavor/bpb: 3b384ae9b753379332855654a28f4091a751f89e
[INFO] validating manifest of MindFlavor/bpb 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 MindFlavor/bpb 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 MindFlavor/bpb
[INFO] finished frobbing MindFlavor/bpb
[INFO] frobbed toml for MindFlavor/bpb written to work/ex/beta-1.38-1/sources/1.37.0/gh/MindFlavor/bpb/Cargo.toml
[INFO] started frobbing MindFlavor/bpb
[INFO] finished frobbing MindFlavor/bpb
[INFO] frobbed toml for MindFlavor/bpb written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/MindFlavor/bpb/Cargo.toml
[INFO] crate MindFlavor/bpb 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 MindFlavor/bpb 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-5/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/MindFlavor/bpb:/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] beff4b7f9e1ebfd43a7114ac0541ac68014a6b9531273b8d52fc7de564147b3a
[INFO] running `"docker" "start" "-a" "beff4b7f9e1ebfd43a7114ac0541ac68014a6b9531273b8d52fc7de564147b3a"`
[INFO] [stderr]    Compiling bpb v0.1.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unused return value of `std::iter::Iterator::collect` that must be used
[INFO] [stderr]   --> src/main.rs:62:9
[INFO] [stderr]    |
[INFO] [stderr] 62 | /         stc.fields
[INFO] [stderr] 63 | |             .iter()
[INFO] [stderr] 64 | |             .filter(|f| !f.optional)
[INFO] [stderr] 65 | |             .map(|bt| abt.push(bt.builder_type.clone().unwrap()))
[INFO] [stderr] 66 | |             .collect::<()>();
[INFO] [stderr]    | |_____________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.84s
[INFO] running `"docker" "inspect" "beff4b7f9e1ebfd43a7114ac0541ac68014a6b9531273b8d52fc7de564147b3a"`
[INFO] running `"docker" "rm" "-f" "beff4b7f9e1ebfd43a7114ac0541ac68014a6b9531273b8d52fc7de564147b3a"`
[INFO] [stdout] beff4b7f9e1ebfd43a7114ac0541ac68014a6b9531273b8d52fc7de564147b3a
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/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/MindFlavor/bpb:/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] c3ec3db1c5ceb1320c3705dace851e898fbc8cd4f44ec7688141ee1f444cc01b
[INFO] running `"docker" "start" "-a" "c3ec3db1c5ceb1320c3705dace851e898fbc8cd4f44ec7688141ee1f444cc01b"`
[INFO] [stderr]    Compiling bpb v0.1.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unused return value of `std::iter::Iterator::collect` that must be used
[INFO] [stderr]   --> src/main.rs:62:9
[INFO] [stderr]    |
[INFO] [stderr] 62 | /         stc.fields
[INFO] [stderr] 63 | |             .iter()
[INFO] [stderr] 64 | |             .filter(|f| !f.optional)
[INFO] [stderr] 65 | |             .map(|bt| abt.push(bt.builder_type.clone().unwrap()))
[INFO] [stderr] 66 | |             .collect::<()>();
[INFO] [stderr]    | |_____________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.50s
[INFO] running `"docker" "inspect" "c3ec3db1c5ceb1320c3705dace851e898fbc8cd4f44ec7688141ee1f444cc01b"`
[INFO] running `"docker" "rm" "-f" "c3ec3db1c5ceb1320c3705dace851e898fbc8cd4f44ec7688141ee1f444cc01b"`
[INFO] [stdout] c3ec3db1c5ceb1320c3705dace851e898fbc8cd4f44ec7688141ee1f444cc01b
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/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/MindFlavor/bpb:/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] 646471eab531b21a044424bd73a0c04c40e4c28fe6d72283f8f8b77a4446bddd
[INFO] running `"docker" "start" "-a" "646471eab531b21a044424bd73a0c04c40e4c28fe6d72283f8f8b77a4446bddd"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/bpb-4bfe4ea2c5c0d546
[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" "646471eab531b21a044424bd73a0c04c40e4c28fe6d72283f8f8b77a4446bddd"`
[INFO] running `"docker" "rm" "-f" "646471eab531b21a044424bd73a0c04c40e4c28fe6d72283f8f8b77a4446bddd"`
[INFO] [stdout] 646471eab531b21a044424bd73a0c04c40e4c28fe6d72283f8f8b77a4446bddd