[INFO] updating cached repository jonathan-s/serde_prefix
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/jonathan-s/serde_prefix
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/jonathan-s/serde_prefix" "work/ex/beta-1.38-1/sources/1.37.0/gh/jonathan-s/serde_prefix"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/jonathan-s/serde_prefix'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/jonathan-s/serde_prefix" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/jonathan-s/serde_prefix"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/jonathan-s/serde_prefix'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 65317ab9ebae85492d61e7ddd0a5abf90c7a6d29
[INFO] sha for GitHub repo jonathan-s/serde_prefix: 65317ab9ebae85492d61e7ddd0a5abf90c7a6d29
[INFO] validating manifest of jonathan-s/serde_prefix 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 jonathan-s/serde_prefix 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 jonathan-s/serde_prefix
[INFO] finished frobbing jonathan-s/serde_prefix
[INFO] frobbed toml for jonathan-s/serde_prefix written to work/ex/beta-1.38-1/sources/1.37.0/gh/jonathan-s/serde_prefix/Cargo.toml
[INFO] started frobbing jonathan-s/serde_prefix
[INFO] finished frobbing jonathan-s/serde_prefix
[INFO] frobbed toml for jonathan-s/serde_prefix written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/jonathan-s/serde_prefix/Cargo.toml
[INFO] crate jonathan-s/serde_prefix 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 jonathan-s/serde_prefix 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/jonathan-s/serde_prefix:/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] 3c1124c33eafb68961a368288f5c4b81cc8d94818b8a0127a91995319173b57a
[INFO] running `"docker" "start" "-a" "3c1124c33eafb68961a368288f5c4b81cc8d94818b8a0127a91995319173b57a"`
[INFO] [stderr]    Compiling syn v0.15.36
[INFO] [stderr]    Compiling serde_derive v1.0.92
[INFO] [stderr]    Compiling serde v1.0.92
[INFO] [stderr]    Compiling serde_json v1.0.39
[INFO] [stderr]    Compiling serde_prefix v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 46.81s
[INFO] running `"docker" "inspect" "3c1124c33eafb68961a368288f5c4b81cc8d94818b8a0127a91995319173b57a"`
[INFO] running `"docker" "rm" "-f" "3c1124c33eafb68961a368288f5c4b81cc8d94818b8a0127a91995319173b57a"`
[INFO] [stdout] 3c1124c33eafb68961a368288f5c4b81cc8d94818b8a0127a91995319173b57a
[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/jonathan-s/serde_prefix:/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] 8148229d59ddb859f55b05868fde364e65d5aa3398df5e0a843c361b79537d2f
[INFO] running `"docker" "start" "-a" "8148229d59ddb859f55b05868fde364e65d5aa3398df5e0a843c361b79537d2f"`
[INFO] [stderr]    Compiling serde_prefix v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.50s
[INFO] running `"docker" "inspect" "8148229d59ddb859f55b05868fde364e65d5aa3398df5e0a843c361b79537d2f"`
[INFO] running `"docker" "rm" "-f" "8148229d59ddb859f55b05868fde364e65d5aa3398df5e0a843c361b79537d2f"`
[INFO] [stdout] 8148229d59ddb859f55b05868fde364e65d5aa3398df5e0a843c361b79537d2f
[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/jonathan-s/serde_prefix:/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] c8a32d40c657f29d197572c45ea7d85a4b358108a8adf64d72076485f2d52f8e
[INFO] running `"docker" "start" "-a" "c8a32d40c657f29d197572c45ea7d85a4b358108a8adf64d72076485f2d52f8e"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/serde_prefix-fdb5e3e8c4e158c1
[INFO] [stderr]      Running /opt/crater/target/debug/deps/test_prefix-09a49565fae70aee
[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] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test test_enum ... ok
[INFO] [stdout] test test_prefix_struct ... ok
[INFO] [stderr]    Doc-tests serde_prefix
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[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" "c8a32d40c657f29d197572c45ea7d85a4b358108a8adf64d72076485f2d52f8e"`
[INFO] running `"docker" "rm" "-f" "c8a32d40c657f29d197572c45ea7d85a4b358108a8adf64d72076485f2d52f8e"`
[INFO] [stdout] c8a32d40c657f29d197572c45ea7d85a4b358108a8adf64d72076485f2d52f8e