[INFO] updating cached repository jiegec/classroom-helper
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/jiegec/classroom-helper
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/jiegec/classroom-helper" "work/ex/beta-1.38-1/sources/1.37.0/gh/jiegec/classroom-helper"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/jiegec/classroom-helper'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/jiegec/classroom-helper" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/jiegec/classroom-helper"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/jiegec/classroom-helper'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 7918d8c8525d6a6f9bf530d70bc977731614e3dc
[INFO] sha for GitHub repo jiegec/classroom-helper: 7918d8c8525d6a6f9bf530d70bc977731614e3dc
[INFO] validating manifest of jiegec/classroom-helper 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 jiegec/classroom-helper 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 jiegec/classroom-helper
[INFO] finished frobbing jiegec/classroom-helper
[INFO] frobbed toml for jiegec/classroom-helper written to work/ex/beta-1.38-1/sources/1.37.0/gh/jiegec/classroom-helper/Cargo.toml
[INFO] started frobbing jiegec/classroom-helper
[INFO] finished frobbing jiegec/classroom-helper
[INFO] frobbed toml for jiegec/classroom-helper written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/jiegec/classroom-helper/Cargo.toml
[INFO] crate jiegec/classroom-helper 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 jiegec/classroom-helper 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-0/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/jiegec/classroom-helper:/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] 73ffde6cf56c559f67dda710227116cc42ccbeabce22772a879256d4f1fd8e2b
[INFO] running `"docker" "start" "-a" "73ffde6cf56c559f67dda710227116cc42ccbeabce22772a879256d4f1fd8e2b"`
[INFO] [stderr]    Compiling cassowary v0.3.0
[INFO] [stderr]    Compiling itertools v0.8.0
[INFO] [stderr]    Compiling memchr v2.2.0
[INFO] [stderr]    Compiling regex-automata v0.1.7
[INFO] [stderr]    Compiling termion v1.5.3
[INFO] [stderr]    Compiling toml v0.4.10
[INFO] [stderr]    Compiling threadpool v1.7.1
[INFO] [stderr]    Compiling aho-corasick v0.7.4
[INFO] [stderr]    Compiling csv-core v0.1.6
[INFO] [stderr]    Compiling bstr v0.2.1
[INFO] [stderr]    Compiling nom v4.2.3
[INFO] [stderr]    Compiling regex v1.1.7
[INFO] [stderr]    Compiling tui v0.5.1
[INFO] [stderr]    Compiling csv v1.1.1
[INFO] [stderr]    Compiling serde-hjson v0.8.2
[INFO] [stderr]    Compiling config v0.9.3
[INFO] [stderr]    Compiling classroom-helper v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 47.03s
[INFO] running `"docker" "inspect" "73ffde6cf56c559f67dda710227116cc42ccbeabce22772a879256d4f1fd8e2b"`
[INFO] running `"docker" "rm" "-f" "73ffde6cf56c559f67dda710227116cc42ccbeabce22772a879256d4f1fd8e2b"`
[INFO] [stdout] 73ffde6cf56c559f67dda710227116cc42ccbeabce22772a879256d4f1fd8e2b
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/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/jiegec/classroom-helper:/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] 7903a2f102db3bb7a8a9929e66a5c3a0b7a2f9597301d20dcd0ba53c49419516
[INFO] running `"docker" "start" "-a" "7903a2f102db3bb7a8a9929e66a5c3a0b7a2f9597301d20dcd0ba53c49419516"`
[INFO] [stderr]    Compiling classroom-helper v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.46s
[INFO] running `"docker" "inspect" "7903a2f102db3bb7a8a9929e66a5c3a0b7a2f9597301d20dcd0ba53c49419516"`
[INFO] running `"docker" "rm" "-f" "7903a2f102db3bb7a8a9929e66a5c3a0b7a2f9597301d20dcd0ba53c49419516"`
[INFO] [stdout] 7903a2f102db3bb7a8a9929e66a5c3a0b7a2f9597301d20dcd0ba53c49419516
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/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/jiegec/classroom-helper:/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] 515b13803347e86295fff94b18fa78ed808a935c8b9c0ec4b2e92463d68eb010
[INFO] running `"docker" "start" "-a" "515b13803347e86295fff94b18fa78ed808a935c8b9c0ec4b2e92463d68eb010"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.09s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/classroom_helper-a2b0182b7868b2bb
[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" "515b13803347e86295fff94b18fa78ed808a935c8b9c0ec4b2e92463d68eb010"`
[INFO] running `"docker" "rm" "-f" "515b13803347e86295fff94b18fa78ed808a935c8b9c0ec4b2e92463d68eb010"`
[INFO] [stdout] 515b13803347e86295fff94b18fa78ed808a935c8b9c0ec4b2e92463d68eb010