[INFO] updating cached repository khuey/rustc-1.18-regression
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/khuey/rustc-1.18-regression
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/khuey/rustc-1.18-regression" "work/ex/beta-1.37-6/sources/1.36.0/gh/khuey/rustc-1.18-regression"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/khuey/rustc-1.18-regression'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/khuey/rustc-1.18-regression" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/khuey/rustc-1.18-regression"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/khuey/rustc-1.18-regression'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 358a3adb46ac9859d5083e4a7bdccbbfc32d7deb
[INFO] sha for GitHub repo khuey/rustc-1.18-regression: 358a3adb46ac9859d5083e4a7bdccbbfc32d7deb
[INFO] validating manifest of khuey/rustc-1.18-regression on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of khuey/rustc-1.18-regression on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing khuey/rustc-1.18-regression
[INFO] finished frobbing khuey/rustc-1.18-regression
[INFO] frobbed toml for khuey/rustc-1.18-regression written to work/ex/beta-1.37-6/sources/1.36.0/gh/khuey/rustc-1.18-regression/Cargo.toml
[INFO] started frobbing khuey/rustc-1.18-regression
[INFO] finished frobbing khuey/rustc-1.18-regression
[INFO] frobbed toml for khuey/rustc-1.18-regression written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/khuey/rustc-1.18-regression/Cargo.toml
[INFO] crate khuey/rustc-1.18-regression already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing khuey/rustc-1.18-regression against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-5/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/khuey/rustc-1.18-regression:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 5abec7723e7d0df26545372d9f2101997fb7ad6f1e8f055d7f3929561457c706
[INFO] running `"docker" "start" "-a" "5abec7723e7d0df26545372d9f2101997fb7ad6f1e8f055d7f3929561457c706"`
[INFO] [stderr]    Compiling regression v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: function is never used: `main`
[INFO] [stderr]  --> src/lib.rs:8:1
[INFO] [stderr]   |
[INFO] [stderr] 8 | fn main() {
[INFO] [stderr]   | ^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.42s
[INFO] running `"docker" "inspect" "5abec7723e7d0df26545372d9f2101997fb7ad6f1e8f055d7f3929561457c706"`
[INFO] running `"docker" "rm" "-f" "5abec7723e7d0df26545372d9f2101997fb7ad6f1e8f055d7f3929561457c706"`
[INFO] [stdout] 5abec7723e7d0df26545372d9f2101997fb7ad6f1e8f055d7f3929561457c706
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-5/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/khuey/rustc-1.18-regression:/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 6c5c08f82c05d6e363a218ca081986081f1a0a477c5958f02ddba6c21c120910
[INFO] running `"docker" "start" "-a" "6c5c08f82c05d6e363a218ca081986081f1a0a477c5958f02ddba6c21c120910"`
[INFO] [stderr]    Compiling regression v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.71s
[INFO] running `"docker" "inspect" "6c5c08f82c05d6e363a218ca081986081f1a0a477c5958f02ddba6c21c120910"`
[INFO] running `"docker" "rm" "-f" "6c5c08f82c05d6e363a218ca081986081f1a0a477c5958f02ddba6c21c120910"`
[INFO] [stdout] 6c5c08f82c05d6e363a218ca081986081f1a0a477c5958f02ddba6c21c120910
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-5/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/khuey/rustc-1.18-regression:/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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] 468fb38304b1c00c2f420ee883b2c85371fc81171c544cc91674b379085cee85
[INFO] running `"docker" "start" "-a" "468fb38304b1c00c2f420ee883b2c85371fc81171c544cc91674b379085cee85"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/regression-783635c71e698301
[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] [stderr]    Doc-tests regression
[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" "468fb38304b1c00c2f420ee883b2c85371fc81171c544cc91674b379085cee85"`
[INFO] running `"docker" "rm" "-f" "468fb38304b1c00c2f420ee883b2c85371fc81171c544cc91674b379085cee85"`
[INFO] [stdout] 468fb38304b1c00c2f420ee883b2c85371fc81171c544cc91674b379085cee85