[INFO] updating cached repository aaronhipple/magic-squares
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/aaronhipple/magic-squares
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/aaronhipple/magic-squares" "work/ex/beta-1.37-6/sources/1.36.0/gh/aaronhipple/magic-squares"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/aaronhipple/magic-squares'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/aaronhipple/magic-squares" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/aaronhipple/magic-squares"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/aaronhipple/magic-squares'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 0155b84593dd36686aca9dbcbf51c080b6d91eca
[INFO] sha for GitHub repo aaronhipple/magic-squares: 0155b84593dd36686aca9dbcbf51c080b6d91eca
[INFO] validating manifest of aaronhipple/magic-squares 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 aaronhipple/magic-squares 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 aaronhipple/magic-squares
[INFO] finished frobbing aaronhipple/magic-squares
[INFO] frobbed toml for aaronhipple/magic-squares written to work/ex/beta-1.37-6/sources/1.36.0/gh/aaronhipple/magic-squares/Cargo.toml
[INFO] started frobbing aaronhipple/magic-squares
[INFO] finished frobbing aaronhipple/magic-squares
[INFO] frobbed toml for aaronhipple/magic-squares written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/aaronhipple/magic-squares/Cargo.toml
[INFO] crate aaronhipple/magic-squares 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] error: the lock file /mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/aaronhipple/magic-squares/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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 aaronhipple/magic-squares 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-6/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/aaronhipple/magic-squares:/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] fd46b61a328ebbf89ad0d9b628d411b9fc4e57c7b1f2d3127405337075bf147b
[INFO] running `"docker" "start" "-a" "fd46b61a328ebbf89ad0d9b628d411b9fc4e57c7b1f2d3127405337075bf147b"`
[INFO] [stderr]    Compiling magic_squares v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: value assigned to `sum` is never read
[INFO] [stderr]   --> src/main.rs:14:13
[INFO] [stderr]    |
[INFO] [stderr] 14 |     let mut sum = 0;
[INFO] [stderr]    |             ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_assignments)] on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.01s
[INFO] running `"docker" "inspect" "fd46b61a328ebbf89ad0d9b628d411b9fc4e57c7b1f2d3127405337075bf147b"`
[INFO] running `"docker" "rm" "-f" "fd46b61a328ebbf89ad0d9b628d411b9fc4e57c7b1f2d3127405337075bf147b"`
[INFO] [stdout] fd46b61a328ebbf89ad0d9b628d411b9fc4e57c7b1f2d3127405337075bf147b
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/aaronhipple/magic-squares:/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] 3d44f4e05093464ccf1463e59eade03bc9934d67f21622af1ddd7f78e71d89b1
[INFO] running `"docker" "start" "-a" "3d44f4e05093464ccf1463e59eade03bc9934d67f21622af1ddd7f78e71d89b1"`
[INFO] [stderr]    Compiling magic_squares v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: value assigned to `sum` is never read
[INFO] [stderr]   --> src/main.rs:14:13
[INFO] [stderr]    |
[INFO] [stderr] 14 |     let mut sum = 0;
[INFO] [stderr]    |             ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_assignments)] on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.78s
[INFO] running `"docker" "inspect" "3d44f4e05093464ccf1463e59eade03bc9934d67f21622af1ddd7f78e71d89b1"`
[INFO] running `"docker" "rm" "-f" "3d44f4e05093464ccf1463e59eade03bc9934d67f21622af1ddd7f78e71d89b1"`
[INFO] [stdout] 3d44f4e05093464ccf1463e59eade03bc9934d67f21622af1ddd7f78e71d89b1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/aaronhipple/magic-squares:/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] 605daf4a4716442a20b20c75423d411267ade55527a2df7da04fcd8e413eb441
[INFO] running `"docker" "start" "-a" "605daf4a4716442a20b20c75423d411267ade55527a2df7da04fcd8e413eb441"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/magic_squares-e21f0b18c10570e2
[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" "605daf4a4716442a20b20c75423d411267ade55527a2df7da04fcd8e413eb441"`
[INFO] running `"docker" "rm" "-f" "605daf4a4716442a20b20c75423d411267ade55527a2df7da04fcd8e413eb441"`
[INFO] [stdout] 605daf4a4716442a20b20c75423d411267ade55527a2df7da04fcd8e413eb441