[INFO] updating cached repository uchuhimo/rust_playground
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/uchuhimo/rust_playground
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/uchuhimo/rust_playground" "work/ex/beta-1.37-6/sources/1.36.0/gh/uchuhimo/rust_playground"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/uchuhimo/rust_playground'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/uchuhimo/rust_playground" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/uchuhimo/rust_playground"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/uchuhimo/rust_playground'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 216615f4167db9941b3bb4d9084204e6dc953140
[INFO] sha for GitHub repo uchuhimo/rust_playground: 216615f4167db9941b3bb4d9084204e6dc953140
[INFO] validating manifest of uchuhimo/rust_playground 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 uchuhimo/rust_playground 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 uchuhimo/rust_playground
[INFO] finished frobbing uchuhimo/rust_playground
[INFO] frobbed toml for uchuhimo/rust_playground written to work/ex/beta-1.37-6/sources/1.36.0/gh/uchuhimo/rust_playground/Cargo.toml
[INFO] started frobbing uchuhimo/rust_playground
[INFO] finished frobbing uchuhimo/rust_playground
[INFO] frobbed toml for uchuhimo/rust_playground written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/uchuhimo/rust_playground/Cargo.toml
[INFO] crate uchuhimo/rust_playground 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 uchuhimo/rust_playground against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/uchuhimo/rust_playground:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 939415c3d4725a532a98a7e07b5e1fa3257b204bcfce895fa5b49f9c67f43c5f
[INFO] running `"docker" "start" "-a" "939415c3d4725a532a98a7e07b5e1fa3257b204bcfce895fa5b49f9c67f43c5f"`
[INFO] [stderr]    Compiling rust_playground v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.76s
[INFO] running `"docker" "inspect" "939415c3d4725a532a98a7e07b5e1fa3257b204bcfce895fa5b49f9c67f43c5f"`
[INFO] running `"docker" "rm" "-f" "939415c3d4725a532a98a7e07b5e1fa3257b204bcfce895fa5b49f9c67f43c5f"`
[INFO] [stdout] 939415c3d4725a532a98a7e07b5e1fa3257b204bcfce895fa5b49f9c67f43c5f
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/uchuhimo/rust_playground:/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 310a61528c65ab7689d5b95669b5008202d7abd9eeabf24caee8238d460ea249
[INFO] running `"docker" "start" "-a" "310a61528c65ab7689d5b95669b5008202d7abd9eeabf24caee8238d460ea249"`
[INFO] [stderr]    Compiling rust_playground v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.81s
[INFO] running `"docker" "inspect" "310a61528c65ab7689d5b95669b5008202d7abd9eeabf24caee8238d460ea249"`
[INFO] running `"docker" "rm" "-f" "310a61528c65ab7689d5b95669b5008202d7abd9eeabf24caee8238d460ea249"`
[INFO] [stdout] 310a61528c65ab7689d5b95669b5008202d7abd9eeabf24caee8238d460ea249
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/uchuhimo/rust_playground:/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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] 1e31d31194dea489c78d651f37f5acbe309a9ac2f5d5dd590f2421b461ca9cb3
[INFO] running `"docker" "start" "-a" "1e31d31194dea489c78d651f37f5acbe309a9ac2f5d5dd590f2421b461ca9cb3"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/playground-8f1ee5dbdf9a1b77
[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] [stderr]      Running /opt/crater/target/debug/deps/multi_impl-cac7d2264f131ad9
[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] [stderr]      Running /opt/crater/target/debug/deps/overload-6562927908f675ac
[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] [stderr]      Running /opt/crater/target/debug/deps/trait_object-bddfb4b6b1349167
[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] [stderr]    Doc-tests playground
[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" "1e31d31194dea489c78d651f37f5acbe309a9ac2f5d5dd590f2421b461ca9cb3"`
[INFO] running `"docker" "rm" "-f" "1e31d31194dea489c78d651f37f5acbe309a9ac2f5d5dd590f2421b461ca9cb3"`
[INFO] [stdout] 1e31d31194dea489c78d651f37f5acbe309a9ac2f5d5dd590f2421b461ca9cb3