[INFO] updating cached repository learn-you-a-rust/loops
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/learn-you-a-rust/loops
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/learn-you-a-rust/loops" "work/ex/beta-1.38-1/sources/1.37.0/gh/learn-you-a-rust/loops"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/learn-you-a-rust/loops'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/learn-you-a-rust/loops" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/learn-you-a-rust/loops"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/learn-you-a-rust/loops'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] e2e6d1b96218d184a45c1fa7d99cc7d06fd32152
[INFO] sha for GitHub repo learn-you-a-rust/loops: e2e6d1b96218d184a45c1fa7d99cc7d06fd32152
[INFO] validating manifest of learn-you-a-rust/loops on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of learn-you-a-rust/loops on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing learn-you-a-rust/loops
[INFO] finished frobbing learn-you-a-rust/loops
[INFO] frobbed toml for learn-you-a-rust/loops written to work/ex/beta-1.38-1/sources/1.37.0/gh/learn-you-a-rust/loops/Cargo.toml
[INFO] started frobbing learn-you-a-rust/loops
[INFO] finished frobbing learn-you-a-rust/loops
[INFO] frobbed toml for learn-you-a-rust/loops written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/learn-you-a-rust/loops/Cargo.toml
[INFO] crate learn-you-a-rust/loops already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing learn-you-a-rust/loops against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/learn-you-a-rust/loops:/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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 6bb579b4b81d44b2bf4d026c5f0c704e38294da837564824cec77583d6494dff
[INFO] running `"docker" "start" "-a" "6bb579b4b81d44b2bf4d026c5f0c704e38294da837564824cec77583d6494dff"`
[INFO] [stderr]    Compiling loops v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.29s
[INFO] running `"docker" "inspect" "6bb579b4b81d44b2bf4d026c5f0c704e38294da837564824cec77583d6494dff"`
[INFO] running `"docker" "rm" "-f" "6bb579b4b81d44b2bf4d026c5f0c704e38294da837564824cec77583d6494dff"`
[INFO] [stdout] 6bb579b4b81d44b2bf4d026c5f0c704e38294da837564824cec77583d6494dff
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/learn-you-a-rust/loops:/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" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] 611035b6478225aeee8904ca4b157975ddf57320a443bb20253d96705cc62fc2
[INFO] running `"docker" "start" "-a" "611035b6478225aeee8904ca4b157975ddf57320a443bb20253d96705cc62fc2"`
[INFO] [stderr]    Compiling loops v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.32s
[INFO] running `"docker" "inspect" "611035b6478225aeee8904ca4b157975ddf57320a443bb20253d96705cc62fc2"`
[INFO] running `"docker" "rm" "-f" "611035b6478225aeee8904ca4b157975ddf57320a443bb20253d96705cc62fc2"`
[INFO] [stdout] 611035b6478225aeee8904ca4b157975ddf57320a443bb20253d96705cc62fc2
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/learn-you-a-rust/loops:/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" "+beta-2019-08-13" "test" "--frozen"`
[INFO] [stdout] 4fbaa074a111cdcc56cf4e51df158aad92554d6ed50a74ab2c943baeeb3ec8d3
[INFO] running `"docker" "start" "-a" "4fbaa074a111cdcc56cf4e51df158aad92554d6ed50a74ab2c943baeeb3ec8d3"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/loops-88342897d3726cea
[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" "4fbaa074a111cdcc56cf4e51df158aad92554d6ed50a74ab2c943baeeb3ec8d3"`
[INFO] running `"docker" "rm" "-f" "4fbaa074a111cdcc56cf4e51df158aad92554d6ed50a74ab2c943baeeb3ec8d3"`
[INFO] [stdout] 4fbaa074a111cdcc56cf4e51df158aad92554d6ed50a74ab2c943baeeb3ec8d3