[INFO] updating cached repository msvisser/ArithmeticCoding
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/msvisser/ArithmeticCoding
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/msvisser/ArithmeticCoding" "work/ex/beta-1.37-6/sources/1.36.0/gh/msvisser/ArithmeticCoding"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/msvisser/ArithmeticCoding'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/msvisser/ArithmeticCoding" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/msvisser/ArithmeticCoding"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/msvisser/ArithmeticCoding'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c0c91a3baf21f232c4edef0efe5c02a6c3f28394
[INFO] sha for GitHub repo msvisser/ArithmeticCoding: c0c91a3baf21f232c4edef0efe5c02a6c3f28394
[INFO] validating manifest of msvisser/ArithmeticCoding 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 msvisser/ArithmeticCoding 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 msvisser/ArithmeticCoding
[INFO] finished frobbing msvisser/ArithmeticCoding
[INFO] frobbed toml for msvisser/ArithmeticCoding written to work/ex/beta-1.37-6/sources/1.36.0/gh/msvisser/ArithmeticCoding/Cargo.toml
[INFO] started frobbing msvisser/ArithmeticCoding
[INFO] finished frobbing msvisser/ArithmeticCoding
[INFO] frobbed toml for msvisser/ArithmeticCoding written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/msvisser/ArithmeticCoding/Cargo.toml
[INFO] crate msvisser/ArithmeticCoding 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 msvisser/ArithmeticCoding 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-4/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/msvisser/ArithmeticCoding:/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] c0eb10adb905b805400720cf74644c71c5aff63f60e66d10a1b2d5638ef7ed45
[INFO] running `"docker" "start" "-a" "c0eb10adb905b805400720cf74644c71c5aff63f60e66d10a1b2d5638ef7ed45"`
[INFO] [stderr]    Compiling arithmetic_coding v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: cannot borrow `cumulative` as mutable because it is also borrowed as immutable
[INFO] [stderr]   --> src/coding/probability/zero_order.rs:19:13
[INFO] [stderr]    |
[INFO] [stderr] 17 |             let previous_cumulative = cumulative.get(symbol).unwrap_or(&0);
[INFO] [stderr]    |                                       ---------- immutable borrow occurs here
[INFO] [stderr] 18 |             let previous_probability = probabilities.get(symbol).unwrap_or(&0);
[INFO] [stderr] 19 |             cumulative.push(previous_probability + previous_cumulative);
[INFO] [stderr]    |             ^^^^^^^^^^ mutable borrow occurs here  ------------------- immutable borrow later used here
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(mutable_borrow_reservation_conflict)] on by default
[INFO] [stderr]    = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stderr]    = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.98s
[INFO] running `"docker" "inspect" "c0eb10adb905b805400720cf74644c71c5aff63f60e66d10a1b2d5638ef7ed45"`
[INFO] running `"docker" "rm" "-f" "c0eb10adb905b805400720cf74644c71c5aff63f60e66d10a1b2d5638ef7ed45"`
[INFO] [stdout] c0eb10adb905b805400720cf74644c71c5aff63f60e66d10a1b2d5638ef7ed45
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/msvisser/ArithmeticCoding:/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] 416a4fd9cc007874af49889416c82220e689ab33e3e810f28e4e2b7a41ec4031
[INFO] running `"docker" "start" "-a" "416a4fd9cc007874af49889416c82220e689ab33e3e810f28e4e2b7a41ec4031"`
[INFO] [stderr]    Compiling arithmetic_coding v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: cannot borrow `cumulative` as mutable because it is also borrowed as immutable
[INFO] [stderr]   --> src/coding/probability/zero_order.rs:19:13
[INFO] [stderr]    |
[INFO] [stderr] 17 |             let previous_cumulative = cumulative.get(symbol).unwrap_or(&0);
[INFO] [stderr]    |                                       ---------- immutable borrow occurs here
[INFO] [stderr] 18 |             let previous_probability = probabilities.get(symbol).unwrap_or(&0);
[INFO] [stderr] 19 |             cumulative.push(previous_probability + previous_cumulative);
[INFO] [stderr]    |             ^^^^^^^^^^ mutable borrow occurs here  ------------------- immutable borrow later used here
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(mutable_borrow_reservation_conflict)] on by default
[INFO] [stderr]    = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stderr]    = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.83s
[INFO] running `"docker" "inspect" "416a4fd9cc007874af49889416c82220e689ab33e3e810f28e4e2b7a41ec4031"`
[INFO] running `"docker" "rm" "-f" "416a4fd9cc007874af49889416c82220e689ab33e3e810f28e4e2b7a41ec4031"`
[INFO] [stdout] 416a4fd9cc007874af49889416c82220e689ab33e3e810f28e4e2b7a41ec4031
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/msvisser/ArithmeticCoding:/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] 019a78ca20baded14328981a71f26bd1609f3337a7069da630c0b411e609dbcc
[INFO] running `"docker" "start" "-a" "019a78ca20baded14328981a71f26bd1609f3337a7069da630c0b411e609dbcc"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/arithmetic_coding-400fe280eb365e98
[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" "019a78ca20baded14328981a71f26bd1609f3337a7069da630c0b411e609dbcc"`
[INFO] running `"docker" "rm" "-f" "019a78ca20baded14328981a71f26bd1609f3337a7069da630c0b411e609dbcc"`
[INFO] [stdout] 019a78ca20baded14328981a71f26bd1609f3337a7069da630c0b411e609dbcc