[INFO] updating cached repository VictorKoenders/math_solver
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/VictorKoenders/math_solver
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/VictorKoenders/math_solver" "work/ex/beta-1.38-1/sources/1.37.0/gh/VictorKoenders/math_solver"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/VictorKoenders/math_solver'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/VictorKoenders/math_solver" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/VictorKoenders/math_solver"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/VictorKoenders/math_solver'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a9f015caeb0613b091375e4157ddd0b4eb79176f
[INFO] sha for GitHub repo VictorKoenders/math_solver: a9f015caeb0613b091375e4157ddd0b4eb79176f
[INFO] validating manifest of VictorKoenders/math_solver 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 VictorKoenders/math_solver 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 VictorKoenders/math_solver
[INFO] finished frobbing VictorKoenders/math_solver
[INFO] frobbed toml for VictorKoenders/math_solver written to work/ex/beta-1.38-1/sources/1.37.0/gh/VictorKoenders/math_solver/Cargo.toml
[INFO] started frobbing VictorKoenders/math_solver
[INFO] finished frobbing VictorKoenders/math_solver
[INFO] frobbed toml for VictorKoenders/math_solver written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/VictorKoenders/math_solver/Cargo.toml
[INFO] crate VictorKoenders/math_solver 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 VictorKoenders/math_solver against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/VictorKoenders/math_solver:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 92e770a41ffb36e18dc029a8645a21d3349b48c1dda51f81a0122359e107c338
[INFO] running `"docker" "start" "-a" "92e770a41ffb36e18dc029a8645a21d3349b48c1dda51f81a0122359e107c338"`
[INFO] [stderr]    Compiling math_solver v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.09s
[INFO] running `"docker" "inspect" "92e770a41ffb36e18dc029a8645a21d3349b48c1dda51f81a0122359e107c338"`
[INFO] running `"docker" "rm" "-f" "92e770a41ffb36e18dc029a8645a21d3349b48c1dda51f81a0122359e107c338"`
[INFO] [stdout] 92e770a41ffb36e18dc029a8645a21d3349b48c1dda51f81a0122359e107c338
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/VictorKoenders/math_solver:/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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 10812ba3eb68f5fb182413bd4b28cbb66f490dc27fda81bcf1ecbc483de75dbb
[INFO] running `"docker" "start" "-a" "10812ba3eb68f5fb182413bd4b28cbb66f490dc27fda81bcf1ecbc483de75dbb"`
[INFO] [stderr]    Compiling math_solver v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.22s
[INFO] running `"docker" "inspect" "10812ba3eb68f5fb182413bd4b28cbb66f490dc27fda81bcf1ecbc483de75dbb"`
[INFO] running `"docker" "rm" "-f" "10812ba3eb68f5fb182413bd4b28cbb66f490dc27fda81bcf1ecbc483de75dbb"`
[INFO] [stdout] 10812ba3eb68f5fb182413bd4b28cbb66f490dc27fda81bcf1ecbc483de75dbb
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/VictorKoenders/math_solver:/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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] bd04ab0156c6a388f2268ac2c204dee847a5c85e8e66f0be27b6bd8b2769ceb7
[INFO] running `"docker" "start" "-a" "bd04ab0156c6a388f2268ac2c204dee847a5c85e8e66f0be27b6bd8b2769ceb7"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/math_solver-89c8d3a6f1cf51e7
[INFO] [stderr]      Running /opt/crater/target/debug/deps/math_solver-9e909c2d079990c6
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests math_solver
[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] [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" "bd04ab0156c6a388f2268ac2c204dee847a5c85e8e66f0be27b6bd8b2769ceb7"`
[INFO] running `"docker" "rm" "-f" "bd04ab0156c6a388f2268ac2c204dee847a5c85e8e66f0be27b6bd8b2769ceb7"`
[INFO] [stdout] bd04ab0156c6a388f2268ac2c204dee847a5c85e8e66f0be27b6bd8b2769ceb7