[INFO] updating cached repository upenn-cis198-2018f/lecture7
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/upenn-cis198-2018f/lecture7
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/upenn-cis198-2018f/lecture7" "work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/upenn-cis198-2018f/lecture7"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/upenn-cis198-2018f/lecture7'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/upenn-cis198-2018f/lecture7" "work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/upenn-cis198-2018f/lecture7"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/upenn-cis198-2018f/lecture7'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c312d0cf54716bd7cf03ac3321a3697d66830819
[INFO] sha for GitHub repo upenn-cis198-2018f/lecture7: c312d0cf54716bd7cf03ac3321a3697d66830819
[INFO] validating manifest of upenn-cis198-2018f/lecture7 on toolchain master#435236b8877cdb98c82eaebfb7887782277265c5
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of upenn-cis198-2018f/lecture7 on toolchain try#b5c7f157c20453dde8d47371abe73b32351b4e7f
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing upenn-cis198-2018f/lecture7
[INFO] finished frobbing upenn-cis198-2018f/lecture7
[INFO] frobbed toml for upenn-cis198-2018f/lecture7 written to work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/upenn-cis198-2018f/lecture7/Cargo.toml
[INFO] started frobbing upenn-cis198-2018f/lecture7
[INFO] finished frobbing upenn-cis198-2018f/lecture7
[INFO] frobbed toml for upenn-cis198-2018f/lecture7 written to work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/upenn-cis198-2018f/lecture7/Cargo.toml
[INFO] crate upenn-cis198-2018f/lecture7 already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking upenn-cis198-2018f/lecture7 against try#b5c7f157c20453dde8d47371abe73b32351b4e7f for pr-62849
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62849/worker-3/try#b5c7f157c20453dde8d47371abe73b32351b4e7f:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/upenn-cis198-2018f/lecture7:/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" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 7c8f58a615f4f23e62915f8dd736b8ecbf1b8952bdc064d89d9c09ad25baeee7
[INFO] running `"docker" "start" "-a" "7c8f58a615f4f23e62915f8dd736b8ecbf1b8952bdc064d89d9c09ad25baeee7"`
[INFO] [stderr]     Checking lecture7 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.54s
[INFO] running `"docker" "inspect" "7c8f58a615f4f23e62915f8dd736b8ecbf1b8952bdc064d89d9c09ad25baeee7"`
[INFO] running `"docker" "rm" "-f" "7c8f58a615f4f23e62915f8dd736b8ecbf1b8952bdc064d89d9c09ad25baeee7"`
[INFO] [stdout] 7c8f58a615f4f23e62915f8dd736b8ecbf1b8952bdc064d89d9c09ad25baeee7