[INFO] updating cached repository monjohn/prufen
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/monjohn/prufen
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/monjohn/prufen" "work/ex/beta-1.37-6/sources/1.36.0/gh/monjohn/prufen"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/monjohn/prufen'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/monjohn/prufen" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/monjohn/prufen"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/monjohn/prufen'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] dd8402a6b51cb53a3ad6827fd9944c5894f647a8
[INFO] sha for GitHub repo monjohn/prufen: dd8402a6b51cb53a3ad6827fd9944c5894f647a8
[INFO] validating manifest of monjohn/prufen 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 monjohn/prufen 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 monjohn/prufen
[INFO] finished frobbing monjohn/prufen
[INFO] frobbed toml for monjohn/prufen written to work/ex/beta-1.37-6/sources/1.36.0/gh/monjohn/prufen/Cargo.toml
[INFO] started frobbing monjohn/prufen
[INFO] finished frobbing monjohn/prufen
[INFO] frobbed toml for monjohn/prufen written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/monjohn/prufen/Cargo.toml
[INFO] crate monjohn/prufen 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 monjohn/prufen 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-1/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/monjohn/prufen:/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] 0f6945b50b417ef023b3b307e2b756a606cb557e5199d56663e3bb4ef9ac9e8c
[INFO] running `"docker" "start" "-a" "0f6945b50b417ef023b3b307e2b756a606cb557e5199d56663e3bb4ef9ac9e8c"`
[INFO] [stderr]    Compiling csv-core v0.1.4
[INFO] [stderr]    Compiling regex v0.2.6
[INFO] [stderr]    Compiling csv v1.0.0-beta.5
[INFO] [stderr]    Compiling prufen v0.1.2 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:45:45
[INFO] [stderr]    |
[INFO] [stderr] 45 | fn read_file() -> Result<Vec<WordPair>, Box<Error>> {
[INFO] [stderr]    |                                             ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.97s
[INFO] running `"docker" "inspect" "0f6945b50b417ef023b3b307e2b756a606cb557e5199d56663e3bb4ef9ac9e8c"`
[INFO] running `"docker" "rm" "-f" "0f6945b50b417ef023b3b307e2b756a606cb557e5199d56663e3bb4ef9ac9e8c"`
[INFO] [stdout] 0f6945b50b417ef023b3b307e2b756a606cb557e5199d56663e3bb4ef9ac9e8c
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/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/monjohn/prufen:/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] 2eae53908d238b790b3d541126fdb952c1203596052986c259b215ab87a16106
[INFO] running `"docker" "start" "-a" "2eae53908d238b790b3d541126fdb952c1203596052986c259b215ab87a16106"`
[INFO] [stderr]    Compiling prufen v0.1.2 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:45:45
[INFO] [stderr]    |
[INFO] [stderr] 45 | fn read_file() -> Result<Vec<WordPair>, Box<Error>> {
[INFO] [stderr]    |                                             ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.67s
[INFO] running `"docker" "inspect" "2eae53908d238b790b3d541126fdb952c1203596052986c259b215ab87a16106"`
[INFO] running `"docker" "rm" "-f" "2eae53908d238b790b3d541126fdb952c1203596052986c259b215ab87a16106"`
[INFO] [stdout] 2eae53908d238b790b3d541126fdb952c1203596052986c259b215ab87a16106
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/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/monjohn/prufen:/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] 2b3ce33d3218f2a38a5c47bde79ce414e9ab7ab064e5486bbc135dae40e50843
[INFO] running `"docker" "start" "-a" "2b3ce33d3218f2a38a5c47bde79ce414e9ab7ab064e5486bbc135dae40e50843"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/prufen-25ba2a9c3e5dcbc1
[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" "2b3ce33d3218f2a38a5c47bde79ce414e9ab7ab064e5486bbc135dae40e50843"`
[INFO] running `"docker" "rm" "-f" "2b3ce33d3218f2a38a5c47bde79ce414e9ab7ab064e5486bbc135dae40e50843"`
[INFO] [stdout] 2b3ce33d3218f2a38a5c47bde79ce414e9ab7ab064e5486bbc135dae40e50843