[INFO] updating cached repository JiaboHou/rust_playground
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/JiaboHou/rust_playground
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/JiaboHou/rust_playground" "work/ex/beta-1.38-1/sources/1.37.0/gh/JiaboHou/rust_playground"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/JiaboHou/rust_playground'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/JiaboHou/rust_playground" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/JiaboHou/rust_playground"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/JiaboHou/rust_playground'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 88dd4d888058b9388ff376e44acdf1014b2af347
[INFO] sha for GitHub repo JiaboHou/rust_playground: 88dd4d888058b9388ff376e44acdf1014b2af347
[INFO] validating manifest of JiaboHou/rust_playground 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 JiaboHou/rust_playground 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 JiaboHou/rust_playground
[INFO] finished frobbing JiaboHou/rust_playground
[INFO] frobbed toml for JiaboHou/rust_playground written to work/ex/beta-1.38-1/sources/1.37.0/gh/JiaboHou/rust_playground/Cargo.toml
[INFO] started frobbing JiaboHou/rust_playground
[INFO] finished frobbing JiaboHou/rust_playground
[INFO] frobbed toml for JiaboHou/rust_playground written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/JiaboHou/rust_playground/Cargo.toml
[INFO] crate JiaboHou/rust_playground 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 JiaboHou/rust_playground 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-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/JiaboHou/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 7d3d66dfaf03486a60f1a489274ad3224b791903fa1305fd0737c9af0e3b5a15
[INFO] running `"docker" "start" "-a" "7d3d66dfaf03486a60f1a489274ad3224b791903fa1305fd0737c9af0e3b5a15"`
[INFO] [stderr]    Compiling rust_playground v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.72s
[INFO] running `"docker" "inspect" "7d3d66dfaf03486a60f1a489274ad3224b791903fa1305fd0737c9af0e3b5a15"`
[INFO] running `"docker" "rm" "-f" "7d3d66dfaf03486a60f1a489274ad3224b791903fa1305fd0737c9af0e3b5a15"`
[INFO] [stdout] 7d3d66dfaf03486a60f1a489274ad3224b791903fa1305fd0737c9af0e3b5a15
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/JiaboHou/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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 865297cc119a04181c8f44519b031d4bb27fd7be09a314442542839373d2aa54
[INFO] running `"docker" "start" "-a" "865297cc119a04181c8f44519b031d4bb27fd7be09a314442542839373d2aa54"`
[INFO] [stderr]    Compiling rust_playground v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.84s
[INFO] running `"docker" "inspect" "865297cc119a04181c8f44519b031d4bb27fd7be09a314442542839373d2aa54"`
[INFO] running `"docker" "rm" "-f" "865297cc119a04181c8f44519b031d4bb27fd7be09a314442542839373d2aa54"`
[INFO] [stdout] 865297cc119a04181c8f44519b031d4bb27fd7be09a314442542839373d2aa54
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/JiaboHou/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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] e8ed45572529aa4324d8bc043ff50a451108682de20af996addf455978d47a2a
[INFO] running `"docker" "start" "-a" "e8ed45572529aa4324d8bc043ff50a451108682de20af996addf455978d47a2a"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rust_playground-87c6ab59dd2b2a42
[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" "e8ed45572529aa4324d8bc043ff50a451108682de20af996addf455978d47a2a"`
[INFO] running `"docker" "rm" "-f" "e8ed45572529aa4324d8bc043ff50a451108682de20af996addf455978d47a2a"`
[INFO] [stdout] e8ed45572529aa4324d8bc043ff50a451108682de20af996addf455978d47a2a