[INFO] updating cached repository chrisshyi/MinHeap
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/chrisshyi/MinHeap
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/chrisshyi/MinHeap" "work/ex/beta-1.38-1/sources/1.37.0/gh/chrisshyi/MinHeap"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/chrisshyi/MinHeap'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/chrisshyi/MinHeap" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/chrisshyi/MinHeap"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/chrisshyi/MinHeap'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 3d740e76adb988c43a0c63dc862e8aa587aece0d
[INFO] sha for GitHub repo chrisshyi/MinHeap: 3d740e76adb988c43a0c63dc862e8aa587aece0d
[INFO] validating manifest of chrisshyi/MinHeap 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 chrisshyi/MinHeap 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 chrisshyi/MinHeap
[INFO] finished frobbing chrisshyi/MinHeap
[INFO] frobbed toml for chrisshyi/MinHeap written to work/ex/beta-1.38-1/sources/1.37.0/gh/chrisshyi/MinHeap/Cargo.toml
[INFO] started frobbing chrisshyi/MinHeap
[INFO] finished frobbing chrisshyi/MinHeap
[INFO] frobbed toml for chrisshyi/MinHeap written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/chrisshyi/MinHeap/Cargo.toml
[INFO] crate chrisshyi/MinHeap 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 chrisshyi/MinHeap 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/chrisshyi/MinHeap:/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] ca773403415a0d016aa868a153011285b305b2d944f0fd688a14b7b9a0029b48
[INFO] running `"docker" "start" "-a" "ca773403415a0d016aa868a153011285b305b2d944f0fd688a14b7b9a0029b48"`
[INFO] [stderr]    Compiling min_heap v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:49:13
[INFO] [stderr]    |
[INFO] [stderr] 49 |         let mut median: i32;
[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 0.80s
[INFO] running `"docker" "inspect" "ca773403415a0d016aa868a153011285b305b2d944f0fd688a14b7b9a0029b48"`
[INFO] running `"docker" "rm" "-f" "ca773403415a0d016aa868a153011285b305b2d944f0fd688a14b7b9a0029b48"`
[INFO] [stdout] ca773403415a0d016aa868a153011285b305b2d944f0fd688a14b7b9a0029b48
[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/chrisshyi/MinHeap:/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] 6ec41b7d7f2562088f007425a1133e2ab52d48da502ab1f1feb3082bdd9edd8e
[INFO] running `"docker" "start" "-a" "6ec41b7d7f2562088f007425a1133e2ab52d48da502ab1f1feb3082bdd9edd8e"`
[INFO] [stderr]    Compiling min_heap v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:49:13
[INFO] [stderr]    |
[INFO] [stderr] 49 |         let mut median: i32;
[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 0.84s
[INFO] running `"docker" "inspect" "6ec41b7d7f2562088f007425a1133e2ab52d48da502ab1f1feb3082bdd9edd8e"`
[INFO] running `"docker" "rm" "-f" "6ec41b7d7f2562088f007425a1133e2ab52d48da502ab1f1feb3082bdd9edd8e"`
[INFO] [stdout] 6ec41b7d7f2562088f007425a1133e2ab52d48da502ab1f1feb3082bdd9edd8e
[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/chrisshyi/MinHeap:/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] f031b7647f15af8671897165a121171ecf7fba86a8b367ddfd9983bbb1da6517
[INFO] running `"docker" "start" "-a" "f031b7647f15af8671897165a121171ecf7fba86a8b367ddfd9983bbb1da6517"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/min_heap-85352982850b61af
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test tests::test_extract_min ... ok
[INFO] [stderr]      Running /opt/crater/target/debug/deps/min_heap-153610ab42638f46
[INFO] [stdout] test tests::test_heapify ... ok
[INFO] [stderr]    Doc-tests min_heap
[INFO] [stdout] test tests::test_heap_insertion ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 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" "f031b7647f15af8671897165a121171ecf7fba86a8b367ddfd9983bbb1da6517"`
[INFO] running `"docker" "rm" "-f" "f031b7647f15af8671897165a121171ecf7fba86a8b367ddfd9983bbb1da6517"`
[INFO] [stdout] f031b7647f15af8671897165a121171ecf7fba86a8b367ddfd9983bbb1da6517