[INFO] cloning repository truedoomboom/IntroductionToRust
[INFO] running `"git" "clone" "--bare" "git://github.com/truedoomboom/IntroductionToRust.git" "work/cache/sources/gh/truedoomboom/IntroductionToRust"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/truedoomboom/IntroductionToRust'...
[INFO] running `"git" "clone" "work/cache/sources/gh/truedoomboom/IntroductionToRust" "work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/truedoomboom/IntroductionToRust"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/truedoomboom/IntroductionToRust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/truedoomboom/IntroductionToRust" "work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/truedoomboom/IntroductionToRust"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/truedoomboom/IntroductionToRust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f688a7a7bcacb24629919470bb46375efc9c6257
[INFO] sha for GitHub repo truedoomboom/IntroductionToRust: f688a7a7bcacb24629919470bb46375efc9c6257
[INFO] validating manifest of truedoomboom/IntroductionToRust 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 truedoomboom/IntroductionToRust 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 truedoomboom/IntroductionToRust
[INFO] finished frobbing truedoomboom/IntroductionToRust
[INFO] frobbed toml for truedoomboom/IntroductionToRust written to work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/truedoomboom/IntroductionToRust/Cargo.toml
[INFO] started frobbing truedoomboom/IntroductionToRust
[INFO] finished frobbing truedoomboom/IntroductionToRust
[INFO] frobbed toml for truedoomboom/IntroductionToRust written to work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/truedoomboom/IntroductionToRust/Cargo.toml
[INFO] crate truedoomboom/IntroductionToRust 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 truedoomboom/IntroductionToRust against master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1 for pr-62008
[INFO] running `"docker" "create" "-v" "/mnt/big/ec2-user/crater/work/local/target-dirs/pr-62008/worker-5/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1:/opt/crater/target:rw,Z" "-v" "/mnt/big/ec2-user/crater/work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/truedoomboom/IntroductionToRust:/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] 8208d9c3209581fcb08b609a5e2accfa0cfe141a41a2188a2e487ba14f59c38e
[INFO] running `"docker" "start" "-a" "8208d9c3209581fcb08b609a5e2accfa0cfe141a41a2188a2e487ba14f59c38e"`
[INFO] [stderr]     Checking RustProj v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/types.rs:17:9
[INFO] [stderr]    |
[INFO] [stderr] 17 |     let x = 1;
[INFO] [stderr]    |         ^ help: consider prefixing with an underscore: `_x`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: crate `RustProj` should have a snake case name
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(non_snake_case)] on by default
[INFO] [stderr]   = help: convert the identifier to snake case: `rust_proj`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/types.rs:17:9
[INFO] [stderr]    |
[INFO] [stderr] 17 |     let x = 1;
[INFO] [stderr]    |         ^ help: consider prefixing with an underscore: `_x`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: crate `RustProj` should have a snake case name
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(non_snake_case)] on by default
[INFO] [stderr]   = help: convert the identifier to snake case: `rust_proj`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.47s
[INFO] running `"docker" "inspect" "8208d9c3209581fcb08b609a5e2accfa0cfe141a41a2188a2e487ba14f59c38e"`
[INFO] running `"docker" "rm" "-f" "8208d9c3209581fcb08b609a5e2accfa0cfe141a41a2188a2e487ba14f59c38e"`
[INFO] [stdout] 8208d9c3209581fcb08b609a5e2accfa0cfe141a41a2188a2e487ba14f59c38e