[INFO] updating cached repository matthiasbeyer/task-rain
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/matthiasbeyer/task-rain
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/matthiasbeyer/task-rain" "work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/matthiasbeyer/task-rain"`
[INFO] [stderr] Cloning into 'work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/matthiasbeyer/task-rain'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/matthiasbeyer/task-rain" "work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/matthiasbeyer/task-rain"`
[INFO] [stderr] Cloning into 'work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/matthiasbeyer/task-rain'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a711d9adcf3825b2501206e1a0216e3fafb348ee
[INFO] sha for GitHub repo matthiasbeyer/task-rain: a711d9adcf3825b2501206e1a0216e3fafb348ee
[INFO] validating manifest of matthiasbeyer/task-rain on toolchain master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of matthiasbeyer/task-rain on toolchain try#7fea0229842e79db1159ea58ad9a653b288efee9
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing matthiasbeyer/task-rain
[INFO] finished frobbing matthiasbeyer/task-rain
[INFO] frobbed toml for matthiasbeyer/task-rain written to work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/matthiasbeyer/task-rain/Cargo.toml
[INFO] started frobbing matthiasbeyer/task-rain
[INFO] finished frobbing matthiasbeyer/task-rain
[INFO] frobbed toml for matthiasbeyer/task-rain written to work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/matthiasbeyer/task-rain/Cargo.toml
[INFO] crate matthiasbeyer/task-rain has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing matthiasbeyer/task-rain against try#7fea0229842e79db1159ea58ad9a653b288efee9 for pr-57967
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57967/worker-5/try#7fea0229842e79db1159ea58ad9a653b288efee9:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/matthiasbeyer/task-rain:/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=forbid" "-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" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "build" "--frozen"`
[INFO] [stdout] ed7962674b455ef8608ce73a3cb3ff7ecdc7f3844debbcc4c08d1dee9903dea2
[INFO] running `"docker" "start" "-a" "ed7962674b455ef8608ce73a3cb3ff7ecdc7f3844debbcc4c08d1dee9903dea2"`
[INFO] [stderr]    Compiling backtrace-sys v0.1.12
[INFO] [stderr]    Compiling termion v1.5.1
[INFO] [stderr]    Compiling serde_json v0.9.10
[INFO] [stderr]    Compiling uuid v0.4.0
[INFO] [stderr]    Compiling itertools v0.6.2
[INFO] [stderr]    Compiling textwrap v0.8.0
[INFO] [stderr]    Compiling chrono v0.2.25
[INFO] [stderr]    Compiling serde_derive v0.9.15
[INFO] [stderr]    Compiling clap v2.26.1
[INFO] [stderr]    Compiling task-hookrs v0.3.0
[INFO] [stderr]    Compiling backtrace v0.3.3
[INFO] [stderr]    Compiling error-chain v0.11.0
[INFO] [stderr]    Compiling mowl v1.2.0
[INFO] [stderr]    Compiling rain v0.3.1
[INFO] [stderr]    Compiling task-graph v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `time`
[INFO] [stderr]   --> src/main.rs:42:10
[INFO] [stderr]    |
[INFO] [stderr] 42 |     for (time, group) in tasks.into_iter() {
[INFO] [stderr]    |          ^^^^ help: consider prefixing with an underscore: `_time`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:27:17
[INFO] [stderr]    |
[INFO] [stderr] 27 |             let mut file = File::open(filename).expect("Couldn't open file");
[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] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:48:5
[INFO] [stderr]    |
[INFO] [stderr] 48 |     graph.print();
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 32.58s
[INFO] running `"docker" "inspect" "ed7962674b455ef8608ce73a3cb3ff7ecdc7f3844debbcc4c08d1dee9903dea2"`
[INFO] running `"docker" "rm" "-f" "ed7962674b455ef8608ce73a3cb3ff7ecdc7f3844debbcc4c08d1dee9903dea2"`
[INFO] [stdout] ed7962674b455ef8608ce73a3cb3ff7ecdc7f3844debbcc4c08d1dee9903dea2
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57967/worker-5/try#7fea0229842e79db1159ea58ad9a653b288efee9:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/matthiasbeyer/task-rain:/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=forbid" "-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" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "test" "--frozen" "--no-run"`
[INFO] [stdout] 94c4e736a44e149efe4c9cf2248cfceb0d8ffb47d5a7d9c65a08d0f960a8d0bc
[INFO] running `"docker" "start" "-a" "94c4e736a44e149efe4c9cf2248cfceb0d8ffb47d5a7d9c65a08d0f960a8d0bc"`
[INFO] [stderr]    Compiling task-graph v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `time`
[INFO] [stderr]   --> src/main.rs:42:10
[INFO] [stderr]    |
[INFO] [stderr] 42 |     for (time, group) in tasks.into_iter() {
[INFO] [stderr]    |          ^^^^ help: consider prefixing with an underscore: `_time`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:27:17
[INFO] [stderr]    |
[INFO] [stderr] 27 |             let mut file = File::open(filename).expect("Couldn't open file");
[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] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:48:5
[INFO] [stderr]    |
[INFO] [stderr] 48 |     graph.print();
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.11s
[INFO] running `"docker" "inspect" "94c4e736a44e149efe4c9cf2248cfceb0d8ffb47d5a7d9c65a08d0f960a8d0bc"`
[INFO] running `"docker" "rm" "-f" "94c4e736a44e149efe4c9cf2248cfceb0d8ffb47d5a7d9c65a08d0f960a8d0bc"`
[INFO] [stdout] 94c4e736a44e149efe4c9cf2248cfceb0d8ffb47d5a7d9c65a08d0f960a8d0bc
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57967/worker-5/try#7fea0229842e79db1159ea58ad9a653b288efee9:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/matthiasbeyer/task-rain:/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=forbid" "-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" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "test" "--frozen"`
[INFO] [stdout] 3993c1412463ebdbf976ec892822247d4d445f3d3fdc2b4863df60953974b273
[INFO] running `"docker" "start" "-a" "3993c1412463ebdbf976ec892822247d4d445f3d3fdc2b4863df60953974b273"`
[INFO] [stderr]     Blocking waiting for file lock on the registry index
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.39s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/task_graph-57634e0d1dd621b7
[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" "3993c1412463ebdbf976ec892822247d4d445f3d3fdc2b4863df60953974b273"`
[INFO] running `"docker" "rm" "-f" "3993c1412463ebdbf976ec892822247d4d445f3d3fdc2b4863df60953974b273"`
[INFO] [stdout] 3993c1412463ebdbf976ec892822247d4d445f3d3fdc2b4863df60953974b273