[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-1.38-1/sources/1.37.0/gh/elbart/jf"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/elbart/jf'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/elbart/jf" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/elbart/jf"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/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 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of elbart/jf 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 elbart/jf
[INFO] finished frobbing elbart/jf
[INFO] frobbed toml for elbart/jf written to work/ex/beta-1.38-1/sources/1.37.0/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-1.38-1/sources/beta-2019-08-13/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" "+1.37.0" "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 elbart/jf against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/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-2019-08-13" "build" "--frozen"`
[INFO] [stdout] a3fa9c814640a3f3cc3540b776d693f4c4a2d664dedf4b34cc173a2f8ad07c5e
[INFO] running `"docker" "start" "-a" "a3fa9c814640a3f3cc3540b776d693f4c4a2d664dedf4b34cc173a2f8ad07c5e"`
[INFO] [stderr]    Compiling num-traits v0.2.2
[INFO] [stderr]    Compiling serde v1.0.37
[INFO] [stderr]    Compiling atty v0.2.8
[INFO] [stderr]    Compiling clap v2.31.2
[INFO] [stderr]    Compiling serde_json v1.0.13
[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 20.87s
[INFO] running `"docker" "inspect" "a3fa9c814640a3f3cc3540b776d693f4c4a2d664dedf4b34cc173a2f8ad07c5e"`
[INFO] running `"docker" "rm" "-f" "a3fa9c814640a3f3cc3540b776d693f4c4a2d664dedf4b34cc173a2f8ad07c5e"`
[INFO] [stdout] a3fa9c814640a3f3cc3540b776d693f4c4a2d664dedf4b34cc173a2f8ad07c5e
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/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-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] 295d603d96fea7c23e0ab9beaecc53a8215df8a7d0cc55bca3e394c28faab8e1
[INFO] running `"docker" "start" "-a" "295d603d96fea7c23e0ab9beaecc53a8215df8a7d0cc55bca3e394c28faab8e1"`
[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 0.81s
[INFO] running `"docker" "inspect" "295d603d96fea7c23e0ab9beaecc53a8215df8a7d0cc55bca3e394c28faab8e1"`
[INFO] running `"docker" "rm" "-f" "295d603d96fea7c23e0ab9beaecc53a8215df8a7d0cc55bca3e394c28faab8e1"`
[INFO] [stdout] 295d603d96fea7c23e0ab9beaecc53a8215df8a7d0cc55bca3e394c28faab8e1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/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-2019-08-13" "test" "--frozen"`
[INFO] [stdout] d7d656beb6d2c5be6ed1d2e42c32e3361dd6d890893a2b4d9e62771be6b82131
[INFO] running `"docker" "start" "-a" "d7d656beb6d2c5be6ed1d2e42c32e3361dd6d890893a2b4d9e62771be6b82131"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/jf-8c4411d878658e94
[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" "d7d656beb6d2c5be6ed1d2e42c32e3361dd6d890893a2b4d9e62771be6b82131"`
[INFO] running `"docker" "rm" "-f" "d7d656beb6d2c5be6ed1d2e42c32e3361dd6d890893a2b4d9e62771be6b82131"`
[INFO] [stdout] d7d656beb6d2c5be6ed1d2e42c32e3361dd6d890893a2b4d9e62771be6b82131