[INFO] updating cached repository https://github.com/BurntSushi/rust-error-handling-case-study
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 8e2af66c6aa41387c578303253e6fac30b679d1d
[INFO] testing BurntSushi/rust-error-handling-case-study against 1.38.0 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2FBurntSushi%2Frust-error-handling-case-study" "work/builds/worker-2/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/BurntSushi/rust-error-handling-case-study on toolchain 1.38.0
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/BurntSushi/rust-error-handling-case-study
[INFO] finished tweaking git repo https://github.com/BurntSushi/rust-error-handling-case-study
[INFO] tweaked toml for git repo https://github.com/BurntSushi/rust-error-handling-case-study written to work/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/BurntSushi/rust-error-handling-case-study already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-2/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.38.0" "build" "--frozen"`
[INFO] [stdout] 5f1fa8f63d4fc0b9c81ea1e3844ce7ca46bf8c9cacedafa3b8f1b7be8dda82aa
[INFO] running `"docker" "start" "-a" "5f1fa8f63d4fc0b9c81ea1e3844ce7ca46bf8c9cacedafa3b8f1b7be8dda82aa"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling csv v0.14.7
[INFO] [stderr]    Compiling thread_local v0.2.7
[INFO] [stderr]    Compiling regex v0.1.80
[INFO] [stderr]    Compiling docopt v0.6.86
[INFO] [stderr]    Compiling city-pop v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:100:20
[INFO] [stderr]     |
[INFO] [stderr] 100 |     let input: Box<io::Read> = match *file_path {
[INFO] [stderr]     |                    ^^^^^^^^ help: use `dyn`: `dyn io::Read`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.59s
[INFO] running `"docker" "inspect" "5f1fa8f63d4fc0b9c81ea1e3844ce7ca46bf8c9cacedafa3b8f1b7be8dda82aa"`
[INFO] running `"docker" "rm" "-f" "5f1fa8f63d4fc0b9c81ea1e3844ce7ca46bf8c9cacedafa3b8f1b7be8dda82aa"`
[INFO] [stdout] 5f1fa8f63d4fc0b9c81ea1e3844ce7ca46bf8c9cacedafa3b8f1b7be8dda82aa
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-2/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.38.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] f33004c0d383b591ff7858eed12c6c702dd3f04d47d02c5da8fa94d25a972ad0
[INFO] running `"docker" "start" "-a" "f33004c0d383b591ff7858eed12c6c702dd3f04d47d02c5da8fa94d25a972ad0"`
[INFO] [stderr]    Compiling city-pop v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:100:20
[INFO] [stderr]     |
[INFO] [stderr] 100 |     let input: Box<io::Read> = match *file_path {
[INFO] [stderr]     |                    ^^^^^^^^ help: use `dyn`: `dyn io::Read`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.40s
[INFO] running `"docker" "inspect" "f33004c0d383b591ff7858eed12c6c702dd3f04d47d02c5da8fa94d25a972ad0"`
[INFO] running `"docker" "rm" "-f" "f33004c0d383b591ff7858eed12c6c702dd3f04d47d02c5da8fa94d25a972ad0"`
[INFO] [stdout] f33004c0d383b591ff7858eed12c6c702dd3f04d47d02c5da8fa94d25a972ad0
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-2/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.38.0" "test" "--frozen"`
[INFO] [stdout] 99720ce1a846bb40d1bab8918ae7022469876dfdc14205ed3393249d4398dea2
[INFO] running `"docker" "start" "-a" "99720ce1a846bb40d1bab8918ae7022469876dfdc14205ed3393249d4398dea2"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.10s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/city_pop-8af98b0e9e839859
[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" "99720ce1a846bb40d1bab8918ae7022469876dfdc14205ed3393249d4398dea2"`
[INFO] running `"docker" "rm" "-f" "99720ce1a846bb40d1bab8918ae7022469876dfdc14205ed3393249d4398dea2"`
[INFO] [stdout] 99720ce1a846bb40d1bab8918ae7022469876dfdc14205ed3393249d4398dea2