[INFO] updating cached repository elbart/jf
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/elbart/jf
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/elbart/jf" "work/ex/beta-1.37-6/sources/1.36.0/gh/elbart/jf"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/elbart/jf'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/elbart/jf" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/elbart/jf"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/elbart/jf'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 8847d70527843afd5cdc96b56203c97736d9a0c2
[INFO] sha for GitHub repo elbart/jf: 8847d70527843afd5cdc96b56203c97736d9a0c2
[INFO] validating manifest of elbart/jf 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 elbart/jf 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 elbart/jf
[INFO] finished frobbing elbart/jf
[INFO] frobbed toml for elbart/jf written to work/ex/beta-1.37-6/sources/1.36.0/gh/elbart/jf/Cargo.toml
[INFO] started frobbing elbart/jf
[INFO] finished frobbing elbart/jf
[INFO] frobbed toml for elbart/jf written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/elbart/jf/Cargo.toml
[INFO] crate elbart/jf 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 elbart/jf 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-6/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/elbart/jf:/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] 8f20863ceac81996b917bd683fbe95ee8a3856c142326d3e3f508f99549b3dca
[INFO] running `"docker" "start" "-a" "8f20863ceac81996b917bd683fbe95ee8a3856c142326d3e3f508f99549b3dca"`
[INFO] [stderr]    Compiling jf v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:71:37
[INFO] [stderr]    |
[INFO] [stderr] 71 | fn read_json_to_string(reader: &mut Read) -> Result<String, std::io::Error> {
[INFO] [stderr]    |                                     ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.10s
[INFO] running `"docker" "inspect" "8f20863ceac81996b917bd683fbe95ee8a3856c142326d3e3f508f99549b3dca"`
[INFO] running `"docker" "rm" "-f" "8f20863ceac81996b917bd683fbe95ee8a3856c142326d3e3f508f99549b3dca"`
[INFO] [stdout] 8f20863ceac81996b917bd683fbe95ee8a3856c142326d3e3f508f99549b3dca
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/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/elbart/jf:/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] a93e424b4c52c1a6c542d60f1f637ef83fe08c7bbabe31c959f6b9f9f29b0396
[INFO] running `"docker" "start" "-a" "a93e424b4c52c1a6c542d60f1f637ef83fe08c7bbabe31c959f6b9f9f29b0396"`
[INFO] [stderr]    Compiling jf v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:71:37
[INFO] [stderr]    |
[INFO] [stderr] 71 | fn read_json_to_string(reader: &mut Read) -> Result<String, std::io::Error> {
[INFO] [stderr]    |                                     ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.50s
[INFO] running `"docker" "inspect" "a93e424b4c52c1a6c542d60f1f637ef83fe08c7bbabe31c959f6b9f9f29b0396"`
[INFO] running `"docker" "rm" "-f" "a93e424b4c52c1a6c542d60f1f637ef83fe08c7bbabe31c959f6b9f9f29b0396"`
[INFO] [stdout] a93e424b4c52c1a6c542d60f1f637ef83fe08c7bbabe31c959f6b9f9f29b0396
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/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/elbart/jf:/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"`
[INFO] [stdout] 6911ec59630a35fb9d7ce0072ea0eb50ae7cd1417361755af05295fe9315db9c
[INFO] running `"docker" "start" "-a" "6911ec59630a35fb9d7ce0072ea0eb50ae7cd1417361755af05295fe9315db9c"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/jf-aca13c8453e3d4d0
[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" "6911ec59630a35fb9d7ce0072ea0eb50ae7cd1417361755af05295fe9315db9c"`
[INFO] running `"docker" "rm" "-f" "6911ec59630a35fb9d7ce0072ea0eb50ae7cd1417361755af05295fe9315db9c"`
[INFO] [stdout] 6911ec59630a35fb9d7ce0072ea0eb50ae7cd1417361755af05295fe9315db9c