[INFO] updating cached repository learn-you-a-rust/variables
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/learn-you-a-rust/variables
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/learn-you-a-rust/variables" "work/ex/beta-1.37-6/sources/1.36.0/gh/learn-you-a-rust/variables"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/learn-you-a-rust/variables'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/learn-you-a-rust/variables" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/learn-you-a-rust/variables"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/learn-you-a-rust/variables'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 2aa0e4db184dfa26ed34c1b2dfb8eebad6d58b08
[INFO] sha for GitHub repo learn-you-a-rust/variables: 2aa0e4db184dfa26ed34c1b2dfb8eebad6d58b08
[INFO] validating manifest of learn-you-a-rust/variables 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 learn-you-a-rust/variables 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 learn-you-a-rust/variables
[INFO] finished frobbing learn-you-a-rust/variables
[INFO] frobbed toml for learn-you-a-rust/variables written to work/ex/beta-1.37-6/sources/1.36.0/gh/learn-you-a-rust/variables/Cargo.toml
[INFO] started frobbing learn-you-a-rust/variables
[INFO] finished frobbing learn-you-a-rust/variables
[INFO] frobbed toml for learn-you-a-rust/variables written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/learn-you-a-rust/variables/Cargo.toml
[INFO] crate learn-you-a-rust/variables 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] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing learn-you-a-rust/variables 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-0/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/learn-you-a-rust/variables:/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] c4a659c15d2c1d038953c1489c9390aefd7ee4dd386538b8513394f2176a9d33
[INFO] running `"docker" "start" "-a" "c4a659c15d2c1d038953c1489c9390aefd7ee4dd386538b8513394f2176a9d33"`
[INFO] [stderr]    Compiling variables v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.45s
[INFO] running `"docker" "inspect" "c4a659c15d2c1d038953c1489c9390aefd7ee4dd386538b8513394f2176a9d33"`
[INFO] running `"docker" "rm" "-f" "c4a659c15d2c1d038953c1489c9390aefd7ee4dd386538b8513394f2176a9d33"`
[INFO] [stdout] c4a659c15d2c1d038953c1489c9390aefd7ee4dd386538b8513394f2176a9d33
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/learn-you-a-rust/variables:/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] c618426b4a7cc9ab5da72d49a6a391b90cbf30b77d15de7d36e1d3db7875f058
[INFO] running `"docker" "start" "-a" "c618426b4a7cc9ab5da72d49a6a391b90cbf30b77d15de7d36e1d3db7875f058"`
[INFO] [stderr]    Compiling variables v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.44s
[INFO] running `"docker" "inspect" "c618426b4a7cc9ab5da72d49a6a391b90cbf30b77d15de7d36e1d3db7875f058"`
[INFO] running `"docker" "rm" "-f" "c618426b4a7cc9ab5da72d49a6a391b90cbf30b77d15de7d36e1d3db7875f058"`
[INFO] [stdout] c618426b4a7cc9ab5da72d49a6a391b90cbf30b77d15de7d36e1d3db7875f058
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/learn-you-a-rust/variables:/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] a052e14d478a9c1e8c186c47a4c874d4729a461fa29ec67c81eff3fce1e66731
[INFO] running `"docker" "start" "-a" "a052e14d478a9c1e8c186c47a4c874d4729a461fa29ec67c81eff3fce1e66731"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[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]      Running /opt/crater/target/debug/deps/variables-e3610fb43b92d6f8
[INFO] running `"docker" "inspect" "a052e14d478a9c1e8c186c47a4c874d4729a461fa29ec67c81eff3fce1e66731"`
[INFO] running `"docker" "rm" "-f" "a052e14d478a9c1e8c186c47a4c874d4729a461fa29ec67c81eff3fce1e66731"`
[INFO] [stdout] a052e14d478a9c1e8c186c47a4c874d4729a461fa29ec67c81eff3fce1e66731