[INFO] updating cached repository letsmut/hello
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/letsmut/hello
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/letsmut/hello" "work/ex/beta-1.38-1/sources/1.37.0/gh/letsmut/hello"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/letsmut/hello'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/letsmut/hello" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/letsmut/hello"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/letsmut/hello'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 9df6f0d924a4115cef6c23aadc2f1e784e9342df
[INFO] sha for GitHub repo letsmut/hello: 9df6f0d924a4115cef6c23aadc2f1e784e9342df
[INFO] validating manifest of letsmut/hello 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 letsmut/hello 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 letsmut/hello
[INFO] finished frobbing letsmut/hello
[INFO] frobbed toml for letsmut/hello written to work/ex/beta-1.38-1/sources/1.37.0/gh/letsmut/hello/Cargo.toml
[INFO] started frobbing letsmut/hello
[INFO] finished frobbing letsmut/hello
[INFO] frobbed toml for letsmut/hello written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/letsmut/hello/Cargo.toml
[INFO] crate letsmut/hello 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 letsmut/hello 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-3/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/letsmut/hello:/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] fd5560c54dd6db88242cfe4c7b68e2292a434921bc685aa14a16bd48e386b76c
[INFO] running `"docker" "start" "-a" "fd5560c54dd6db88242cfe4c7b68e2292a434921bc685aa14a16bd48e386b76c"`
[INFO] [stderr]    Compiling hello v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:27:16
[INFO] [stderr]    |
[INFO] [stderr] 27 | type Job = Box<FnBox + Send + 'static>;
[INFO] [stderr]    |                ^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnBox + Send + 'static`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.10s
[INFO] running `"docker" "inspect" "fd5560c54dd6db88242cfe4c7b68e2292a434921bc685aa14a16bd48e386b76c"`
[INFO] running `"docker" "rm" "-f" "fd5560c54dd6db88242cfe4c7b68e2292a434921bc685aa14a16bd48e386b76c"`
[INFO] [stdout] fd5560c54dd6db88242cfe4c7b68e2292a434921bc685aa14a16bd48e386b76c
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/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/letsmut/hello:/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] 20c1369527641f686ff2be05b80d6e97af0722fcb37e3b04724146b1fb8dad9d
[INFO] running `"docker" "start" "-a" "20c1369527641f686ff2be05b80d6e97af0722fcb37e3b04724146b1fb8dad9d"`
[INFO] [stderr]    Compiling hello v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:27:16
[INFO] [stderr]    |
[INFO] [stderr] 27 | type Job = Box<FnBox + Send + 'static>;
[INFO] [stderr]    |                ^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnBox + Send + 'static`
[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" "20c1369527641f686ff2be05b80d6e97af0722fcb37e3b04724146b1fb8dad9d"`
[INFO] running `"docker" "rm" "-f" "20c1369527641f686ff2be05b80d6e97af0722fcb37e3b04724146b1fb8dad9d"`
[INFO] [stdout] 20c1369527641f686ff2be05b80d6e97af0722fcb37e3b04724146b1fb8dad9d
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/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/letsmut/hello:/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] c547b1ae0f6888d3718d68b43f3f2204ac6d9e2221fbcebce278138f53d18e24
[INFO] running `"docker" "start" "-a" "c547b1ae0f6888d3718d68b43f3f2204ac6d9e2221fbcebce278138f53d18e24"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/hello-be8e09f33eb7e08b
[INFO] [stderr]      Running /opt/crater/target/debug/deps/main-900f5d4e9e31c927
[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] [stdout] 
[INFO] [stderr]    Doc-tests hello
[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] [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" "c547b1ae0f6888d3718d68b43f3f2204ac6d9e2221fbcebce278138f53d18e24"`
[INFO] running `"docker" "rm" "-f" "c547b1ae0f6888d3718d68b43f3f2204ac6d9e2221fbcebce278138f53d18e24"`
[INFO] [stdout] c547b1ae0f6888d3718d68b43f3f2204ac6d9e2221fbcebce278138f53d18e24