[INFO] updating cached repository Mcat12/backtrack
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Mcat12/backtrack
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Mcat12/backtrack" "work/ex/beta-1.38-1/sources/1.37.0/gh/Mcat12/backtrack"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/Mcat12/backtrack'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Mcat12/backtrack" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Mcat12/backtrack"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Mcat12/backtrack'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 9a37c73ecf8ae1343a37bfea66982263d88bb0e4
[INFO] sha for GitHub repo Mcat12/backtrack: 9a37c73ecf8ae1343a37bfea66982263d88bb0e4
[INFO] validating manifest of Mcat12/backtrack 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 Mcat12/backtrack 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 Mcat12/backtrack
[INFO] finished frobbing Mcat12/backtrack
[INFO] frobbed toml for Mcat12/backtrack written to work/ex/beta-1.38-1/sources/1.37.0/gh/Mcat12/backtrack/Cargo.toml
[INFO] started frobbing Mcat12/backtrack
[INFO] finished frobbing Mcat12/backtrack
[INFO] frobbed toml for Mcat12/backtrack written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Mcat12/backtrack/Cargo.toml
[INFO] crate Mcat12/backtrack 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 Mcat12/backtrack 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-5/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/Mcat12/backtrack:/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] 6c80b907df35fa96bb5450769ff610d6d328c15a67452267d3b74a20d40d50cf
[INFO] running `"docker" "start" "-a" "6c80b907df35fa96bb5450769ff610d6d328c15a67452267d3b74a20d40d50cf"`
[INFO] [stderr]    Compiling backtrack v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.62s
[INFO] running `"docker" "inspect" "6c80b907df35fa96bb5450769ff610d6d328c15a67452267d3b74a20d40d50cf"`
[INFO] running `"docker" "rm" "-f" "6c80b907df35fa96bb5450769ff610d6d328c15a67452267d3b74a20d40d50cf"`
[INFO] [stdout] 6c80b907df35fa96bb5450769ff610d6d328c15a67452267d3b74a20d40d50cf
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/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/Mcat12/backtrack:/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] 9da1cc3455d82fe357a0476c06836000f04f7eb39b79c12fc9983dd3616b711a
[INFO] running `"docker" "start" "-a" "9da1cc3455d82fe357a0476c06836000f04f7eb39b79c12fc9983dd3616b711a"`
[INFO] [stderr]    Compiling criterion-plot v0.2.5
[INFO] [stderr]    Compiling memchr v2.1.1
[INFO] [stderr]    Compiling backtrace-sys v0.1.24
[INFO] [stderr]    Compiling num_cpus v1.8.0
[INFO] [stderr]    Compiling chrono v0.4.6
[INFO] [stderr]    Compiling serde_json v1.0.33
[INFO] [stderr]    Compiling synstructure v0.10.1
[INFO] [stderr]    Compiling serde_derive v1.0.81
[INFO] [stderr]    Compiling backtrace v0.3.9
[INFO] [stderr]    Compiling criterion-stats v0.2.5
[INFO] [stderr]    Compiling aho-corasick v0.6.9
[INFO] [stderr]    Compiling csv-core v0.1.4
[INFO] [stderr]    Compiling regex v1.1.0
[INFO] [stderr]    Compiling csv v1.0.2
[INFO] [stderr]    Compiling simplelog v0.5.3
[INFO] [stderr]    Compiling failure_derive v0.1.3
[INFO] [stderr]    Compiling failure v0.1.3
[INFO] [stderr]    Compiling handlebars v0.32.4
[INFO] [stderr]    Compiling criterion v0.2.5
[INFO] [stderr]    Compiling backtrack v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 59.33s
[INFO] running `"docker" "inspect" "9da1cc3455d82fe357a0476c06836000f04f7eb39b79c12fc9983dd3616b711a"`
[INFO] running `"docker" "rm" "-f" "9da1cc3455d82fe357a0476c06836000f04f7eb39b79c12fc9983dd3616b711a"`
[INFO] [stdout] 9da1cc3455d82fe357a0476c06836000f04f7eb39b79c12fc9983dd3616b711a
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/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/Mcat12/backtrack:/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] 53e7cdf590b67f850c95318f4ddc4ecd105a4c175db77059502d16d2dcc87958
[INFO] running `"docker" "start" "-a" "53e7cdf590b67f850c95318f4ddc4ecd105a4c175db77059502d16d2dcc87958"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.08s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/backtrack-4baa0419803758c3
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test queen::tests::is_valid ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/8queens-f4fc6b7a27dfd121
[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] [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/trunk_pack-56a4a05a7a74cfba
[INFO] [stderr]    Doc-tests backtrack
[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" "53e7cdf590b67f850c95318f4ddc4ecd105a4c175db77059502d16d2dcc87958"`
[INFO] running `"docker" "rm" "-f" "53e7cdf590b67f850c95318f4ddc4ecd105a4c175db77059502d16d2dcc87958"`
[INFO] [stdout] 53e7cdf590b67f850c95318f4ddc4ecd105a4c175db77059502d16d2dcc87958