[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-1.37-6/sources/1.36.0/gh/chrisshyi/MinHeap"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/chrisshyi/MinHeap'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/chrisshyi/MinHeap" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/chrisshyi/MinHeap"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/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 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of chrisshyi/MinHeap 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 chrisshyi/MinHeap
[INFO] finished frobbing chrisshyi/MinHeap
[INFO] frobbed toml for chrisshyi/MinHeap written to work/ex/beta-1.37-6/sources/1.36.0/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-1.37-6/sources/beta-2019-07-23/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" "+1.36.0" "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 chrisshyi/MinHeap 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-0/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 836ec72e1460006583274fbc82af16479cfeca42adf876a581c0a55572a70bbc
[INFO] running `"docker" "start" "-a" "836ec72e1460006583274fbc82af16479cfeca42adf876a581c0a55572a70bbc"`
[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 1.25s
[INFO] running `"docker" "inspect" "836ec72e1460006583274fbc82af16479cfeca42adf876a581c0a55572a70bbc"`
[INFO] running `"docker" "rm" "-f" "836ec72e1460006583274fbc82af16479cfeca42adf876a581c0a55572a70bbc"`
[INFO] [stdout] 836ec72e1460006583274fbc82af16479cfeca42adf876a581c0a55572a70bbc
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 2b23a0c7a41f9b47f42a2a5c70bc595820ab796cb0d8c35bc1ebe0916c08297f
[INFO] running `"docker" "start" "-a" "2b23a0c7a41f9b47f42a2a5c70bc595820ab796cb0d8c35bc1ebe0916c08297f"`
[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 1.26s
[INFO] running `"docker" "inspect" "2b23a0c7a41f9b47f42a2a5c70bc595820ab796cb0d8c35bc1ebe0916c08297f"`
[INFO] running `"docker" "rm" "-f" "2b23a0c7a41f9b47f42a2a5c70bc595820ab796cb0d8c35bc1ebe0916c08297f"`
[INFO] [stdout] 2b23a0c7a41f9b47f42a2a5c70bc595820ab796cb0d8c35bc1ebe0916c08297f
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] 54b2fcade6e1b3c38c85de02f1df0cdadffb4a590e66c3d24ccd68b94e8a818d
[INFO] running `"docker" "start" "-a" "54b2fcade6e1b3c38c85de02f1df0cdadffb4a590e66c3d24ccd68b94e8a818d"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/min_heap-15feed082357c62f
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test tests::test_extract_min ... ok
[INFO] [stdout] test tests::test_heap_insertion ... ok
[INFO] [stdout] test tests::test_heapify ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/min_heap-03b9f4efa0c20c66
[INFO] [stderr]    Doc-tests min_heap
[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" "54b2fcade6e1b3c38c85de02f1df0cdadffb4a590e66c3d24ccd68b94e8a818d"`
[INFO] running `"docker" "rm" "-f" "54b2fcade6e1b3c38c85de02f1df0cdadffb4a590e66c3d24ccd68b94e8a818d"`
[INFO] [stdout] 54b2fcade6e1b3c38c85de02f1df0cdadffb4a590e66c3d24ccd68b94e8a818d