[INFO] updating cached repository AxelNilsson/studentbostader
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/AxelNilsson/studentbostader
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/AxelNilsson/studentbostader" "work/ex/beta-1.38-1/sources/1.37.0/gh/AxelNilsson/studentbostader"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/AxelNilsson/studentbostader'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/AxelNilsson/studentbostader" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/AxelNilsson/studentbostader"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/AxelNilsson/studentbostader'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 1a31b96e14d7ed0ee301e9ab184959136850a16a
[INFO] sha for GitHub repo AxelNilsson/studentbostader: 1a31b96e14d7ed0ee301e9ab184959136850a16a
[INFO] validating manifest of AxelNilsson/studentbostader 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 AxelNilsson/studentbostader 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 AxelNilsson/studentbostader
[INFO] finished frobbing AxelNilsson/studentbostader
[INFO] frobbed toml for AxelNilsson/studentbostader written to work/ex/beta-1.38-1/sources/1.37.0/gh/AxelNilsson/studentbostader/Cargo.toml
[INFO] started frobbing AxelNilsson/studentbostader
[INFO] finished frobbing AxelNilsson/studentbostader
[INFO] frobbed toml for AxelNilsson/studentbostader written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/AxelNilsson/studentbostader/Cargo.toml
[INFO] crate AxelNilsson/studentbostader 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 AxelNilsson/studentbostader against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/AxelNilsson/studentbostader:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 92b60814910dda82111c3b727a1c5f19c70217eb1211a5248aa28f4b04eb300b
[INFO] running `"docker" "start" "-a" "92b60814910dda82111c3b727a1c5f19c70217eb1211a5248aa28f4b04eb300b"`
[INFO] [stderr]    Compiling serde v1.0.82
[INFO] [stderr]    Compiling rand v0.5.5
[INFO] [stderr]    Compiling net2 v0.2.33
[INFO] [stderr]    Compiling num_cpus v1.9.0
[INFO] [stderr]    Compiling time v0.1.41
[INFO] [stderr]    Compiling openssl-sys v0.9.40
[INFO] [stderr]    Compiling syn v0.15.23
[INFO] [stderr]    Compiling tokio-io v0.1.10
[INFO] [stderr]    Compiling http v0.1.14
[INFO] [stderr]    Compiling rand v0.6.1
[INFO] [stderr]    Compiling futures-cpupool v0.1.8
[INFO] [stderr]    Compiling openssl v0.10.16
[INFO] [stderr]    Compiling mio v0.6.16
[INFO] [stderr]    Compiling tokio-codec v0.1.1
[INFO] [stderr]    Compiling parking_lot_core v0.3.1
[INFO] [stderr]    Compiling phf_generator v0.7.23
[INFO] [stderr]    Compiling uuid v0.7.1
[INFO] [stderr]    Compiling tokio-threadpool v0.1.9
[INFO] [stderr]    Compiling phf_codegen v0.7.23
[INFO] [stderr]    Compiling parking_lot v0.6.4
[INFO] [stderr]    Compiling mio-uds v0.6.7
[INFO] [stderr]    Compiling mime_guess v2.0.0-alpha.6
[INFO] [stderr]    Compiling tokio-reactor v0.1.7
[INFO] [stderr]    Compiling tokio-fs v0.1.4
[INFO] [stderr]    Compiling h2 v0.1.14
[INFO] [stderr]    Compiling native-tls v0.2.2
[INFO] [stderr]    Compiling tokio-uds v0.2.4
[INFO] [stderr]    Compiling tokio-tcp v0.1.2
[INFO] [stderr]    Compiling tokio-udp v0.1.3
[INFO] [stderr]    Compiling serde_derive v1.0.82
[INFO] [stderr]    Compiling tokio v0.1.13
[INFO] [stderr]    Compiling hyper v0.12.19
[INFO] [stderr]    Compiling serde_urlencoded v0.5.4
[INFO] [stderr]    Compiling serde_json v1.0.33
[INFO] [stderr]    Compiling hyper-tls v0.3.1
[INFO] [stderr]    Compiling reqwest v0.9.5
[INFO] [stderr]    Compiling student v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: cannot borrow `apartment_hashmap` as mutable because it is also borrowed as immutable
[INFO] [stderr]    --> src/main.rs:326:36
[INFO] [stderr]     |
[INFO] [stderr] 325 |         match apartment_hashmap.get(&new_key) {
[INFO] [stderr]     |               ----------------- immutable borrow occurs here
[INFO] [stderr] 326 |             Some(current_count) => apartment_hashmap.insert(new_key, current_count + 1),
[INFO] [stderr]     |                                    ^^^^^^^^^^^^^^^^^                 ------------- immutable borrow later used here
[INFO] [stderr]     |                                    |
[INFO] [stderr]     |                                    mutable borrow occurs 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 1m 34s
[INFO] running `"docker" "inspect" "92b60814910dda82111c3b727a1c5f19c70217eb1211a5248aa28f4b04eb300b"`
[INFO] running `"docker" "rm" "-f" "92b60814910dda82111c3b727a1c5f19c70217eb1211a5248aa28f4b04eb300b"`
[INFO] [stdout] 92b60814910dda82111c3b727a1c5f19c70217eb1211a5248aa28f4b04eb300b
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/AxelNilsson/studentbostader:/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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 2632bb8a6d16c6c98e613d8bc8ae6b54af992b43578a01ed83df9c1369cf11ed
[INFO] running `"docker" "start" "-a" "2632bb8a6d16c6c98e613d8bc8ae6b54af992b43578a01ed83df9c1369cf11ed"`
[INFO] [stderr]    Compiling student v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: cannot borrow `apartment_hashmap` as mutable because it is also borrowed as immutable
[INFO] [stderr]    --> src/main.rs:326:36
[INFO] [stderr]     |
[INFO] [stderr] 325 |         match apartment_hashmap.get(&new_key) {
[INFO] [stderr]     |               ----------------- immutable borrow occurs here
[INFO] [stderr] 326 |             Some(current_count) => apartment_hashmap.insert(new_key, current_count + 1),
[INFO] [stderr]     |                                    ^^^^^^^^^^^^^^^^^                 ------------- immutable borrow later used here
[INFO] [stderr]     |                                    |
[INFO] [stderr]     |                                    mutable borrow occurs 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 2.29s
[INFO] running `"docker" "inspect" "2632bb8a6d16c6c98e613d8bc8ae6b54af992b43578a01ed83df9c1369cf11ed"`
[INFO] running `"docker" "rm" "-f" "2632bb8a6d16c6c98e613d8bc8ae6b54af992b43578a01ed83df9c1369cf11ed"`
[INFO] [stdout] 2632bb8a6d16c6c98e613d8bc8ae6b54af992b43578a01ed83df9c1369cf11ed
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/AxelNilsson/studentbostader:/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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] 1510101ea39f6dc651d8992e85565457a7a375e10ce68c1844cfb0afdad2c1ad
[INFO] running `"docker" "start" "-a" "1510101ea39f6dc651d8992e85565457a7a375e10ce68c1844cfb0afdad2c1ad"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.14s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/student-f682443ef6b46378
[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" "1510101ea39f6dc651d8992e85565457a7a375e10ce68c1844cfb0afdad2c1ad"`
[INFO] running `"docker" "rm" "-f" "1510101ea39f6dc651d8992e85565457a7a375e10ce68c1844cfb0afdad2c1ad"`
[INFO] [stdout] 1510101ea39f6dc651d8992e85565457a7a375e10ce68c1844cfb0afdad2c1ad