[INFO] updating cached repository wspeirs/family_tree
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/wspeirs/family_tree
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/wspeirs/family_tree" "work/ex/beta-1.38-1/sources/1.37.0/gh/wspeirs/family_tree"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/wspeirs/family_tree'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/wspeirs/family_tree" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/wspeirs/family_tree"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/wspeirs/family_tree'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d82a4a12d40dc3d58211d1c2374cb72236f0f6f6
[INFO] sha for GitHub repo wspeirs/family_tree: d82a4a12d40dc3d58211d1c2374cb72236f0f6f6
[INFO] validating manifest of wspeirs/family_tree 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 wspeirs/family_tree 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 wspeirs/family_tree
[INFO] finished frobbing wspeirs/family_tree
[INFO] frobbed toml for wspeirs/family_tree written to work/ex/beta-1.38-1/sources/1.37.0/gh/wspeirs/family_tree/Cargo.toml
[INFO] started frobbing wspeirs/family_tree
[INFO] finished frobbing wspeirs/family_tree
[INFO] frobbed toml for wspeirs/family_tree written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/wspeirs/family_tree/Cargo.toml
[INFO] crate wspeirs/family_tree 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing wspeirs/family_tree 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-7/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/wspeirs/family_tree:/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] 380b03a4ced6a17590c908ff1481d71bef82a7e7b3bab7bde67dac8e1fcbc5fb
[INFO] running `"docker" "start" "-a" "380b03a4ced6a17590c908ff1481d71bef82a7e7b3bab7bde67dac8e1fcbc5fb"`
[INFO] [stderr]    Compiling serde v1.0.83
[INFO] [stderr]    Compiling memchr v2.1.2
[INFO] [stderr]    Compiling syn v0.15.23
[INFO] [stderr]    Compiling pbr v1.0.1
[INFO] [stderr]    Compiling simple_logger v1.0.1
[INFO] [stderr]    Compiling csv-core v0.1.5
[INFO] [stderr]    Compiling serde_derive v1.0.83
[INFO] [stderr]    Compiling csv v1.0.5
[INFO] [stderr]    Compiling family_tree v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #[macro_use]
[INFO] [stderr]   | ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `IntoNodeReferences`
[INFO] [stderr]   --> src/main.rs:12:28
[INFO] [stderr]    |
[INFO] [stderr] 12 | use petgraph::visit::{Dfs, IntoNodeReferences};
[INFO] [stderr]    |                            ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Config`, `Dot`
[INFO] [stderr]   --> src/main.rs:13:21
[INFO] [stderr]    |
[INFO] [stderr] 13 | use petgraph::dot::{Dot, Config};
[INFO] [stderr]    |                     ^^^  ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:133:9
[INFO] [stderr]     |
[INFO] [stderr] 133 |     let mut min_generation = 0;
[INFO] [stderr]     |         ----^^^^^^^^^^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 32.75s
[INFO] running `"docker" "inspect" "380b03a4ced6a17590c908ff1481d71bef82a7e7b3bab7bde67dac8e1fcbc5fb"`
[INFO] running `"docker" "rm" "-f" "380b03a4ced6a17590c908ff1481d71bef82a7e7b3bab7bde67dac8e1fcbc5fb"`
[INFO] [stdout] 380b03a4ced6a17590c908ff1481d71bef82a7e7b3bab7bde67dac8e1fcbc5fb
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/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/wspeirs/family_tree:/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] efa5a8ff618e84ee561a59338f2c150d8100489da55be1f8d2931612ccf4c824
[INFO] running `"docker" "start" "-a" "efa5a8ff618e84ee561a59338f2c150d8100489da55be1f8d2931612ccf4c824"`
[INFO] [stderr]    Compiling family_tree v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #[macro_use]
[INFO] [stderr]   | ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `IntoNodeReferences`
[INFO] [stderr]   --> src/main.rs:12:28
[INFO] [stderr]    |
[INFO] [stderr] 12 | use petgraph::visit::{Dfs, IntoNodeReferences};
[INFO] [stderr]    |                            ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Config`, `Dot`
[INFO] [stderr]   --> src/main.rs:13:21
[INFO] [stderr]    |
[INFO] [stderr] 13 | use petgraph::dot::{Dot, Config};
[INFO] [stderr]    |                     ^^^  ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:133:9
[INFO] [stderr]     |
[INFO] [stderr] 133 |     let mut min_generation = 0;
[INFO] [stderr]     |         ----^^^^^^^^^^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.93s
[INFO] running `"docker" "inspect" "efa5a8ff618e84ee561a59338f2c150d8100489da55be1f8d2931612ccf4c824"`
[INFO] running `"docker" "rm" "-f" "efa5a8ff618e84ee561a59338f2c150d8100489da55be1f8d2931612ccf4c824"`
[INFO] [stdout] efa5a8ff618e84ee561a59338f2c150d8100489da55be1f8d2931612ccf4c824
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/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/wspeirs/family_tree:/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] 5e75c8fc58c33f94358d3a2fb98ab2fb3d1a428add57b16b6f129ea33d6940aa
[INFO] running `"docker" "start" "-a" "5e75c8fc58c33f94358d3a2fb98ab2fb3d1a428add57b16b6f129ea33d6940aa"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/family_tree-5f0ad57318748cab
[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" "5e75c8fc58c33f94358d3a2fb98ab2fb3d1a428add57b16b6f129ea33d6940aa"`
[INFO] running `"docker" "rm" "-f" "5e75c8fc58c33f94358d3a2fb98ab2fb3d1a428add57b16b6f129ea33d6940aa"`
[INFO] [stdout] 5e75c8fc58c33f94358d3a2fb98ab2fb3d1a428add57b16b6f129ea33d6940aa