[INFO] updating cached repository lucarlig/quiz_game
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/lucarlig/quiz_game
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/lucarlig/quiz_game" "work/ex/beta-1.38-1/sources/1.37.0/gh/lucarlig/quiz_game"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/lucarlig/quiz_game'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/lucarlig/quiz_game" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/lucarlig/quiz_game"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/lucarlig/quiz_game'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] bb0309cafb2ed242521173b52d913f3165447057
[INFO] sha for GitHub repo lucarlig/quiz_game: bb0309cafb2ed242521173b52d913f3165447057
[INFO] validating manifest of lucarlig/quiz_game 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 lucarlig/quiz_game 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 lucarlig/quiz_game
[INFO] finished frobbing lucarlig/quiz_game
[INFO] frobbed toml for lucarlig/quiz_game written to work/ex/beta-1.38-1/sources/1.37.0/gh/lucarlig/quiz_game/Cargo.toml
[INFO] started frobbing lucarlig/quiz_game
[INFO] finished frobbing lucarlig/quiz_game
[INFO] frobbed toml for lucarlig/quiz_game written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/lucarlig/quiz_game/Cargo.toml
[INFO] crate lucarlig/quiz_game 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 lucarlig/quiz_game 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-2/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/lucarlig/quiz_game:/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] cce94e7d666ef035c297597ca8db6a98b5a6f7e7657ad446406a55493de687c4
[INFO] running `"docker" "start" "-a" "cce94e7d666ef035c297597ca8db6a98b5a6f7e7657ad446406a55493de687c4"`
[INFO] [stderr]    Compiling libc v0.2.51
[INFO] [stderr]    Compiling memchr v2.2.0
[INFO] [stderr]    Compiling serde v1.0.89
[INFO] [stderr]    Compiling csv-core v0.1.5
[INFO] [stderr]    Compiling csv v1.0.5
[INFO] [stderr]    Compiling quiz_game v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/main.rs:9:44
[INFO] [stderr]   |
[INFO] [stderr] 9 | fn get_first_arg() -> Result<OsString, 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] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:17:42
[INFO] [stderr]    |
[INFO] [stderr] 17 | fn read_csv() -> Result<Vec<String>, Box<Error>> {
[INFO] [stderr]    |                                          ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 18.67s
[INFO] running `"docker" "inspect" "cce94e7d666ef035c297597ca8db6a98b5a6f7e7657ad446406a55493de687c4"`
[INFO] running `"docker" "rm" "-f" "cce94e7d666ef035c297597ca8db6a98b5a6f7e7657ad446406a55493de687c4"`
[INFO] [stdout] cce94e7d666ef035c297597ca8db6a98b5a6f7e7657ad446406a55493de687c4
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/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/lucarlig/quiz_game:/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] 23de1224985acd3f6ba9341199234f18e2354e6a3bc1b92ac7dd34bcd0a21eee
[INFO] running `"docker" "start" "-a" "23de1224985acd3f6ba9341199234f18e2354e6a3bc1b92ac7dd34bcd0a21eee"`
[INFO] [stderr]    Compiling quiz_game v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/main.rs:9:44
[INFO] [stderr]   |
[INFO] [stderr] 9 | fn get_first_arg() -> Result<OsString, 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] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:17:42
[INFO] [stderr]    |
[INFO] [stderr] 17 | fn read_csv() -> Result<Vec<String>, Box<Error>> {
[INFO] [stderr]    |                                          ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.50s
[INFO] running `"docker" "inspect" "23de1224985acd3f6ba9341199234f18e2354e6a3bc1b92ac7dd34bcd0a21eee"`
[INFO] running `"docker" "rm" "-f" "23de1224985acd3f6ba9341199234f18e2354e6a3bc1b92ac7dd34bcd0a21eee"`
[INFO] [stdout] 23de1224985acd3f6ba9341199234f18e2354e6a3bc1b92ac7dd34bcd0a21eee
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/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/lucarlig/quiz_game:/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] 64b06e1e604f733f0b333b2b75a842b8d46be665b4bc778166bd745246782fa9
[INFO] running `"docker" "start" "-a" "64b06e1e604f733f0b333b2b75a842b8d46be665b4bc778166bd745246782fa9"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/quiz_game-e82d5d31b1760867
[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" "64b06e1e604f733f0b333b2b75a842b8d46be665b4bc778166bd745246782fa9"`
[INFO] running `"docker" "rm" "-f" "64b06e1e604f733f0b333b2b75a842b8d46be665b4bc778166bd745246782fa9"`
[INFO] [stdout] 64b06e1e604f733f0b333b2b75a842b8d46be665b4bc778166bd745246782fa9