[INFO] updating cached repository upenn-cis198-2018f/Lecture6
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/upenn-cis198-2018f/Lecture6
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/upenn-cis198-2018f/Lecture6" "work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/upenn-cis198-2018f/Lecture6"`
[INFO] [stderr] Cloning into 'work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/upenn-cis198-2018f/Lecture6'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/upenn-cis198-2018f/Lecture6" "work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/upenn-cis198-2018f/Lecture6"`
[INFO] [stderr] Cloning into 'work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/upenn-cis198-2018f/Lecture6'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b24735f2feb566aa92d433c6c4c6550092e78365
[INFO] sha for GitHub repo upenn-cis198-2018f/Lecture6: b24735f2feb566aa92d433c6c4c6550092e78365
[INFO] validating manifest of upenn-cis198-2018f/Lecture6 on toolchain master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of upenn-cis198-2018f/Lecture6 on toolchain try#7fea0229842e79db1159ea58ad9a653b288efee9
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing upenn-cis198-2018f/Lecture6
[INFO] finished frobbing upenn-cis198-2018f/Lecture6
[INFO] frobbed toml for upenn-cis198-2018f/Lecture6 written to work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/upenn-cis198-2018f/Lecture6/Cargo.toml
[INFO] started frobbing upenn-cis198-2018f/Lecture6
[INFO] finished frobbing upenn-cis198-2018f/Lecture6
[INFO] frobbed toml for upenn-cis198-2018f/Lecture6 written to work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/upenn-cis198-2018f/Lecture6/Cargo.toml
[INFO] crate upenn-cis198-2018f/Lecture6 has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing upenn-cis198-2018f/Lecture6 against master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54 for pr-57967
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57967/worker-1/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/upenn-cis198-2018f/Lecture6:/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=forbid" "-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" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "build" "--frozen"`
[INFO] [stdout] 01ccd86519091ad07c2a0305cd604b03548a7818929395d23348a739e9bad8df
[INFO] running `"docker" "start" "-a" "01ccd86519091ad07c2a0305cd604b03548a7818929395d23348a739e9bad8df"`
[INFO] [stderr]    Compiling lecture6 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::fmt::Display`
[INFO] [stderr]  --> src/generics.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::fmt::Display;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.25s
[INFO] running `"docker" "inspect" "01ccd86519091ad07c2a0305cd604b03548a7818929395d23348a739e9bad8df"`
[INFO] running `"docker" "rm" "-f" "01ccd86519091ad07c2a0305cd604b03548a7818929395d23348a739e9bad8df"`
[INFO] [stdout] 01ccd86519091ad07c2a0305cd604b03548a7818929395d23348a739e9bad8df
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57967/worker-1/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/upenn-cis198-2018f/Lecture6:/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=forbid" "-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" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "test" "--frozen" "--no-run"`
[INFO] [stdout] f79aa04f90a80f232dfed74cc9ab6c5beb97669ab10c82cd40fd49aeff595c87
[INFO] running `"docker" "start" "-a" "f79aa04f90a80f232dfed74cc9ab6c5beb97669ab10c82cd40fd49aeff595c87"`
[INFO] [stderr]    Compiling lecture6 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::fmt::Display`
[INFO] [stderr]  --> src/generics.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::fmt::Display;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.31s
[INFO] running `"docker" "inspect" "f79aa04f90a80f232dfed74cc9ab6c5beb97669ab10c82cd40fd49aeff595c87"`
[INFO] running `"docker" "rm" "-f" "f79aa04f90a80f232dfed74cc9ab6c5beb97669ab10c82cd40fd49aeff595c87"`
[INFO] [stdout] f79aa04f90a80f232dfed74cc9ab6c5beb97669ab10c82cd40fd49aeff595c87
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57967/worker-1/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/upenn-cis198-2018f/Lecture6:/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=forbid" "-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" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "test" "--frozen"`
[INFO] [stdout] 821876cc1aabea2e2a85af6b022938b8a576d78000baf138c595d25eac44b7e5
[INFO] running `"docker" "start" "-a" "821876cc1aabea2e2a85af6b022938b8a576d78000baf138c595d25eac44b7e5"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/lecture6-8d649c5d64654f91
[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" "821876cc1aabea2e2a85af6b022938b8a576d78000baf138c595d25eac44b7e5"`
[INFO] running `"docker" "rm" "-f" "821876cc1aabea2e2a85af6b022938b8a576d78000baf138c595d25eac44b7e5"`
[INFO] [stdout] 821876cc1aabea2e2a85af6b022938b8a576d78000baf138c595d25eac44b7e5