[INFO] updating cached repository rusticus-io/ownership-borrowing-lifetimes
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/rusticus-io/ownership-borrowing-lifetimes
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/rusticus-io/ownership-borrowing-lifetimes" "work/ex/beta-1.37-6/sources/1.36.0/gh/rusticus-io/ownership-borrowing-lifetimes"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/rusticus-io/ownership-borrowing-lifetimes'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/rusticus-io/ownership-borrowing-lifetimes" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/rusticus-io/ownership-borrowing-lifetimes"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/rusticus-io/ownership-borrowing-lifetimes'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 3256db7763021e7ac02874a9e7d672315eb1f7a4
[INFO] sha for GitHub repo rusticus-io/ownership-borrowing-lifetimes: 3256db7763021e7ac02874a9e7d672315eb1f7a4
[INFO] validating manifest of rusticus-io/ownership-borrowing-lifetimes 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 rusticus-io/ownership-borrowing-lifetimes 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 rusticus-io/ownership-borrowing-lifetimes
[INFO] finished frobbing rusticus-io/ownership-borrowing-lifetimes
[INFO] frobbed toml for rusticus-io/ownership-borrowing-lifetimes written to work/ex/beta-1.37-6/sources/1.36.0/gh/rusticus-io/ownership-borrowing-lifetimes/Cargo.toml
[INFO] started frobbing rusticus-io/ownership-borrowing-lifetimes
[INFO] finished frobbing rusticus-io/ownership-borrowing-lifetimes
[INFO] frobbed toml for rusticus-io/ownership-borrowing-lifetimes written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/rusticus-io/ownership-borrowing-lifetimes/Cargo.toml
[INFO] crate rusticus-io/ownership-borrowing-lifetimes 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 rusticus-io/ownership-borrowing-lifetimes against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/rusticus-io/ownership-borrowing-lifetimes:/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-2019-07-23" "build" "--frozen"`
[INFO] [stdout] d7a65b1ce378a674f741e637f901905576025b8c94e0e35440f0ff97e5516836
[INFO] running `"docker" "start" "-a" "d7a65b1ce378a674f741e637f901905576025b8c94e0e35440f0ff97e5516836"`
[INFO] [stderr]    Compiling ownbol v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.80s
[INFO] running `"docker" "inspect" "d7a65b1ce378a674f741e637f901905576025b8c94e0e35440f0ff97e5516836"`
[INFO] running `"docker" "rm" "-f" "d7a65b1ce378a674f741e637f901905576025b8c94e0e35440f0ff97e5516836"`
[INFO] [stdout] d7a65b1ce378a674f741e637f901905576025b8c94e0e35440f0ff97e5516836
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/rusticus-io/ownership-borrowing-lifetimes:/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-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] 90aaa396d83224df68da71a137c39f2a91aa83a75793de0e1b8378a3d28ca72e
[INFO] running `"docker" "start" "-a" "90aaa396d83224df68da71a137c39f2a91aa83a75793de0e1b8378a3d28ca72e"`
[INFO] [stderr]    Compiling ownbol v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable `x` is assigned to, but never used
[INFO] [stderr]   --> examples/03-deferred-definition.rs:14:13
[INFO] [stderr]    |
[INFO] [stderr] 14 |         let x; // declaration           .....+  space reserved on the stack
[INFO] [stderr]    |             ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr]    = note: consider using `_x` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `a`
[INFO] [stderr]   --> examples/03-deferred-definition.rs:17:17
[INFO] [stderr]    |
[INFO] [stderr] 17 |             let a = A("a");                 //  .
[INFO] [stderr]    |                 ^ help: consider prefixing with an underscore: `_a`
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `x` is never read
[INFO] [stderr]   --> examples/03-deferred-definition.rs:18:13
[INFO] [stderr]    |
[INFO] [stderr] 18 |             x = A("x"); // definition       // <!  lifetime of x starts here
[INFO] [stderr]    |             ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_assignments)] on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] error[E0597]: `a` does not live long enough
[INFO] [stderr]   --> examples/04-lifetime.rs:19:17
[INFO] [stderr]    |
[INFO] [stderr] 19 |             x = &a; // definition       !   // <!  lifetime of x starts here | # cover a lifetime
[INFO] [stderr]    |                 ^^ borrowed value does not live long enough
[INFO] [stderr] 20 |             println!("{:?}", x);            //  !  usage of x is valid
[INFO] [stderr] 21 |         } // stack frame ends           !   //  !
[INFO] [stderr]    |         - `a` dropped here while still borrowed
[INFO] [stderr] ...
[INFO] [stderr] 25 |         println!("{:?}", x);                //  !  usage of x leads to borrow checker error
[INFO] [stderr]    |                          - borrow later used here
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0597`.
[INFO] [stderr] error: Could not compile `ownbol`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "90aaa396d83224df68da71a137c39f2a91aa83a75793de0e1b8378a3d28ca72e"`
[INFO] running `"docker" "rm" "-f" "90aaa396d83224df68da71a137c39f2a91aa83a75793de0e1b8378a3d28ca72e"`
[INFO] [stdout] 90aaa396d83224df68da71a137c39f2a91aa83a75793de0e1b8378a3d28ca72e