[INFO] updating cached repository arbaregni/BasicTranspilation
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/arbaregni/BasicTranspilation
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/arbaregni/BasicTranspilation" "work/ex/beta-1.38-1/sources/1.37.0/gh/arbaregni/BasicTranspilation"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/arbaregni/BasicTranspilation'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/arbaregni/BasicTranspilation" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/arbaregni/BasicTranspilation"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/arbaregni/BasicTranspilation'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ee2277599157c738a8387724aac308ddc26f2a05
[INFO] sha for GitHub repo arbaregni/BasicTranspilation: ee2277599157c738a8387724aac308ddc26f2a05
[INFO] validating manifest of arbaregni/BasicTranspilation 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 arbaregni/BasicTranspilation 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 arbaregni/BasicTranspilation
[INFO] finished frobbing arbaregni/BasicTranspilation
[INFO] frobbed toml for arbaregni/BasicTranspilation written to work/ex/beta-1.38-1/sources/1.37.0/gh/arbaregni/BasicTranspilation/Cargo.toml
[INFO] started frobbing arbaregni/BasicTranspilation
[INFO] finished frobbing arbaregni/BasicTranspilation
[INFO] frobbed toml for arbaregni/BasicTranspilation written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/arbaregni/BasicTranspilation/Cargo.toml
[INFO] crate arbaregni/BasicTranspilation 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 arbaregni/BasicTranspilation 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-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/arbaregni/BasicTranspilation:/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] 12f11493d8a770a278538decffc213857b2c03c5e9622acd369d24bc86d10873
[INFO] running `"docker" "start" "-a" "12f11493d8a770a278538decffc213857b2c03c5e9622acd369d24bc86d10873"`
[INFO] [stderr]    Compiling BasicTranspilation v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:59:29
[INFO] [stderr]    |
[INFO] [stderr] 59 |     let mut out_writer: Box<Write> = match maybe_path {
[INFO] [stderr]    |                             ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/builder.rs:146:33
[INFO] [stderr]     |
[INFO] [stderr] 146 |                             let mut handle = expr
[INFO] [stderr]     |                                 ----^^^^^^
[INFO] [stderr]     |                                 |
[INFO] [stderr]     |                                 help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.94s
[INFO] running `"docker" "inspect" "12f11493d8a770a278538decffc213857b2c03c5e9622acd369d24bc86d10873"`
[INFO] running `"docker" "rm" "-f" "12f11493d8a770a278538decffc213857b2c03c5e9622acd369d24bc86d10873"`
[INFO] [stdout] 12f11493d8a770a278538decffc213857b2c03c5e9622acd369d24bc86d10873
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/arbaregni/BasicTranspilation:/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] efd77b4c68b958b3965e6a6713a6fda917dc05729eb491a2b16c1cb32bd98881
[INFO] running `"docker" "start" "-a" "efd77b4c68b958b3965e6a6713a6fda917dc05729eb491a2b16c1cb32bd98881"`
[INFO] [stderr]    Compiling BasicTranspilation v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:59:29
[INFO] [stderr]    |
[INFO] [stderr] 59 |     let mut out_writer: Box<Write> = match maybe_path {
[INFO] [stderr]    |                             ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/builder.rs:146:33
[INFO] [stderr]     |
[INFO] [stderr] 146 |                             let mut handle = expr
[INFO] [stderr]     |                                 ----^^^^^^
[INFO] [stderr]     |                                 |
[INFO] [stderr]     |                                 help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.27s
[INFO] running `"docker" "inspect" "efd77b4c68b958b3965e6a6713a6fda917dc05729eb491a2b16c1cb32bd98881"`
[INFO] running `"docker" "rm" "-f" "efd77b4c68b958b3965e6a6713a6fda917dc05729eb491a2b16c1cb32bd98881"`
[INFO] [stdout] efd77b4c68b958b3965e6a6713a6fda917dc05729eb491a2b16c1cb32bd98881
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/arbaregni/BasicTranspilation:/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] 2db77dc2234214140287275f89b2ff74d294730301809c31df4a3c9bf3840df0
[INFO] running `"docker" "start" "-a" "2db77dc2234214140287275f89b2ff74d294730301809c31df4a3c9bf3840df0"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/BasicTranspilation-edff7e9ccde8a08d
[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" "2db77dc2234214140287275f89b2ff74d294730301809c31df4a3c9bf3840df0"`
[INFO] running `"docker" "rm" "-f" "2db77dc2234214140287275f89b2ff74d294730301809c31df4a3c9bf3840df0"`
[INFO] [stdout] 2db77dc2234214140287275f89b2ff74d294730301809c31df4a3c9bf3840df0