[INFO] cloning repository upenn-cis198-2018f/Lecture6
[INFO] running `"git" "clone" "--bare" "git://github.com/upenn-cis198-2018f/Lecture6.git" "work/cache/sources/gh/upenn-cis198-2018f/Lecture6"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/upenn-cis198-2018f/Lecture6'...
[INFO] running `"git" "clone" "work/cache/sources/gh/upenn-cis198-2018f/Lecture6" "work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/upenn-cis198-2018f/Lecture6"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/upenn-cis198-2018f/Lecture6'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/upenn-cis198-2018f/Lecture6" "work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/upenn-cis198-2018f/Lecture6"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/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#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of upenn-cis198-2018f/Lecture6 on toolchain try#8f81d0bf6baf07b92f1246696722485c4ca0b049
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-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-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/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-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/upenn-cis198-2018f/Lecture6/Cargo.toml
[INFO] crate upenn-cis198-2018f/Lecture6 already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking upenn-cis198-2018f/Lecture6 against master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1 for pr-62008
[INFO] running `"docker" "create" "-v" "/mnt/big/ec2-user/crater/work/local/target-dirs/pr-62008/worker-0/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1:/opt/crater/target:rw,Z" "-v" "/mnt/big/ec2-user/crater/work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/upenn-cis198-2018f/Lecture6:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/ec2-user/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/ec2-user/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" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] c3165476ff165fc1f89f173785378dd7fa7eea1a61f26affd462c6d56a0b00e4
[INFO] running `"docker" "start" "-a" "c3165476ff165fc1f89f173785378dd7fa7eea1a61f26affd462c6d56a0b00e4"`
[INFO] [stderr]     Checking lecture6 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/generics.rs:74:37
[INFO] [stderr]    |
[INFO] [stderr] 74 | fn print_a_bunch_of_things(thing: & Debug) {
[INFO] [stderr]    |                                     ^^^^^ help: use `dyn`: `dyn Debug`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/generics.rs:81:23
[INFO] [stderr]    |
[INFO] [stderr] 81 |     let things: Vec<& Debug> = vec![& 5, & 10.2, & "hello", & Some(5)];
[INFO] [stderr]    |                       ^^^^^ help: use `dyn`: `dyn Debug`
[INFO] [stderr] 
[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] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/generics.rs:74:37
[INFO] [stderr]    |
[INFO] [stderr] 74 | fn print_a_bunch_of_things(thing: & Debug) {
[INFO] [stderr]    |                                     ^^^^^ help: use `dyn`: `dyn Debug`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/generics.rs:81:23
[INFO] [stderr]    |
[INFO] [stderr] 81 |     let things: Vec<& Debug> = vec![& 5, & 10.2, & "hello", & Some(5)];
[INFO] [stderr]    |                       ^^^^^ help: use `dyn`: `dyn Debug`
[INFO] [stderr] 
[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 0.60s
[INFO] running `"docker" "inspect" "c3165476ff165fc1f89f173785378dd7fa7eea1a61f26affd462c6d56a0b00e4"`
[INFO] running `"docker" "rm" "-f" "c3165476ff165fc1f89f173785378dd7fa7eea1a61f26affd462c6d56a0b00e4"`
[INFO] [stdout] c3165476ff165fc1f89f173785378dd7fa7eea1a61f26affd462c6d56a0b00e4