[INFO] updating cached repository hjr3/building-better-interfaces
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/hjr3/building-better-interfaces
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/hjr3/building-better-interfaces" "work/ex/beta-1.38-1/sources/1.37.0/gh/hjr3/building-better-interfaces"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/hjr3/building-better-interfaces'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/hjr3/building-better-interfaces" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/hjr3/building-better-interfaces"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/hjr3/building-better-interfaces'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 4d30913d5f3230f435fed75e13571d4164d6b5d3
[INFO] sha for GitHub repo hjr3/building-better-interfaces: 4d30913d5f3230f435fed75e13571d4164d6b5d3
[INFO] validating manifest of hjr3/building-better-interfaces 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 hjr3/building-better-interfaces 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 hjr3/building-better-interfaces
[INFO] finished frobbing hjr3/building-better-interfaces
[INFO] frobbed toml for hjr3/building-better-interfaces written to work/ex/beta-1.38-1/sources/1.37.0/gh/hjr3/building-better-interfaces/Cargo.toml
[INFO] started frobbing hjr3/building-better-interfaces
[INFO] finished frobbing hjr3/building-better-interfaces
[INFO] frobbed toml for hjr3/building-better-interfaces written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/hjr3/building-better-interfaces/Cargo.toml
[INFO] crate hjr3/building-better-interfaces 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 hjr3/building-better-interfaces 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-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/hjr3/building-better-interfaces:/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] fe1066e3c14775b4345bb74e126599c37d5e6aaf5d2855604c3f2433a3e76a7e
[INFO] running `"docker" "start" "-a" "fe1066e3c14775b4345bb74e126599c37d5e6aaf5d2855604c3f2433a3e76a7e"`
[INFO] [stderr]    Compiling building-better-interfaces v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.65s
[INFO] running `"docker" "inspect" "fe1066e3c14775b4345bb74e126599c37d5e6aaf5d2855604c3f2433a3e76a7e"`
[INFO] running `"docker" "rm" "-f" "fe1066e3c14775b4345bb74e126599c37d5e6aaf5d2855604c3f2433a3e76a7e"`
[INFO] [stdout] fe1066e3c14775b4345bb74e126599c37d5e6aaf5d2855604c3f2433a3e76a7e
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/hjr3/building-better-interfaces:/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] 06dda42591837bf93c3f1b26bb19b9edd04c2a23ee0191328da2e26b20b99d73
[INFO] running `"docker" "start" "-a" "06dda42591837bf93c3f1b26bb19b9edd04c2a23ee0191328da2e26b20b99d73"`
[INFO] [stderr]    Compiling building-better-interfaces v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.23s
[INFO] running `"docker" "inspect" "06dda42591837bf93c3f1b26bb19b9edd04c2a23ee0191328da2e26b20b99d73"`
[INFO] running `"docker" "rm" "-f" "06dda42591837bf93c3f1b26bb19b9edd04c2a23ee0191328da2e26b20b99d73"`
[INFO] [stdout] 06dda42591837bf93c3f1b26bb19b9edd04c2a23ee0191328da2e26b20b99d73
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/hjr3/building-better-interfaces:/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] 6d42873fd34db5970dca8f858d663d754f74439d2b291d3811cbcafe20f9762a
[INFO] running `"docker" "start" "-a" "6d42873fd34db5970dca8f858d663d754f74439d2b291d3811cbcafe20f9762a"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/building_better_interfaces-0429527c7632bae9
[INFO] [stdout] 
[INFO] [stdout] running 41 tests
[INFO] [stdout] test classroom::test::test_classroom_add_student ... ok
[INFO] [stdout] test name::tests::string_into_name_string ... ok
[INFO] [stdout] test courses::tests::test_courses_add_course ... ok
[INFO] [stdout] test classroom::test::test_classroom_add_student_fails ... ok
[INFO] [stdout] test name::tests::test_name_cow ... ok
[INFO] [stdout] test name::tests::test_name_str_into ... ok
[INFO] [stdout] test name::tests::test_name_str_to_name_string ... ok
[INFO] [stdout] test name::tests::test_name_str_into_name_string ... ok
[INFO] [stdout] test name::tests::test_name_str_given ... ok
[INFO] [stdout] test name::tests::test_name_str_as_ref ... ok
[INFO] [stdout] test name::tests::test_name_str_try_into_err ... ok
[INFO] [stdout] test name::tests::test_name_str_try_into_ok ... ok
[INFO] [stdout] test name::tests::test_name_string_as_mut ... ok
[INFO] [stdout] test name::tests::test_name_str_as_mut ... ok
[INFO] [stdout] test name::tests::test_name_str_to_string ... ok
[INFO] [stdout] test name::tests::test_name_str_to_uppercase ... ok
[INFO] [stdout] test name::tests::test_name_str_to_owned ... ok
[INFO] [stdout] test name::tests::test_name_str_family ... ok
[INFO] [stdout] test name::tests::test_name_string_as_mut_str ... ok
[INFO] [stdout] test name::tests::test_name_string_as_mut_name_str ... ok
[INFO] [stdout] test name::tests::test_name_string_as_str ... ok
[INFO] [stdout] test name::tests::test_name_string_as_ref ... ok
[INFO] [stdout] test name::tests::test_name_string_borrow_mut ... ok
[INFO] [stdout] test name::tests::test_name_string_deref ... ok
[INFO] [stdout] test name::tests::test_name_string_deref_mut ... ok
[INFO] [stdout] test name::tests::test_name_string_from_str ... ok
[INFO] [stdout] test name::tests::test_name_string_from_name_str ... ok
[INFO] [stdout] test name::tests::test_name_string_from_string ... ok
[INFO] [stdout] test name::tests::test_name_string_as_name_str ... ok
[INFO] [stdout] test name::tests::test_name_string_borrow ... ok
[INFO] [stdout] test name::tests::test_name_string_into ... ok
[INFO] [stdout] test name::tests::test_name_string_uppercase ... ok
[INFO] [stdout] test name::tests::test_name_try_from_ok ... ok
[INFO] [stdout] test person::tests::test_person_new ... ok
[INFO] [stdout] test student::tests::test_in_class_deref_name_str ... ok
[INFO] [stdout] test name::tests::test_name_string_push ... ok
[INFO] [stdout] test student::tests::test_student_deref_name_str ... ok
[INFO] [stdout] test roster::tests::test_roster_add_name ... ok
[INFO] [stdout] test name::tests::test_name_string_into_string ... ok
[INFO] [stdout] test student::tests::test_student_state_changes ... ok
[INFO] [stdout] test name::tests::test_name_try_from_err ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 41 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests building-better-interfaces
[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" "6d42873fd34db5970dca8f858d663d754f74439d2b291d3811cbcafe20f9762a"`
[INFO] running `"docker" "rm" "-f" "6d42873fd34db5970dca8f858d663d754f74439d2b291d3811cbcafe20f9762a"`
[INFO] [stdout] 6d42873fd34db5970dca8f858d663d754f74439d2b291d3811cbcafe20f9762a