[INFO] updating cached repository carols10cents/sassers
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/carols10cents/sassers
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/carols10cents/sassers" "work/ex/beta-1.38-1/sources/1.37.0/gh/carols10cents/sassers"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/carols10cents/sassers'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/carols10cents/sassers" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/carols10cents/sassers"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/carols10cents/sassers'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 6e32a82bb01b2580d3d755b067bc4994a8cf2c16
[INFO] sha for GitHub repo carols10cents/sassers: 6e32a82bb01b2580d3d755b067bc4994a8cf2c16
[INFO] validating manifest of carols10cents/sassers 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 carols10cents/sassers 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 carols10cents/sassers
[INFO] finished frobbing carols10cents/sassers
[INFO] frobbed toml for carols10cents/sassers written to work/ex/beta-1.38-1/sources/1.37.0/gh/carols10cents/sassers/Cargo.toml
[INFO] started frobbing carols10cents/sassers
[INFO] finished frobbing carols10cents/sassers
[INFO] frobbed toml for carols10cents/sassers written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/carols10cents/sassers/Cargo.toml
[INFO] crate carols10cents/sassers 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 carols10cents/sassers 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-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/carols10cents/sassers:/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] 127cd58bdb3496f1f4adc35e59f2bc1128fd40a58d8f7dfec4c668e6f4ac7f72
[INFO] running `"docker" "start" "-a" "127cd58bdb3496f1f4adc35e59f2bc1128fd40a58d8f7dfec4c668e6f4ac7f72"`
[INFO] [stderr]    Compiling libc v0.2.6
[INFO] [stderr]    Compiling rustc-serialize v0.3.16
[INFO] [stderr] error[E0642]: patterns aren't allowed in methods without bodies
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/rustc-serialize-0.3.16/src/serialize.rs:145:45
[INFO] [stderr]     |
[INFO] [stderr] 145 |                                             &f_name: &str,
[INFO] [stderr]     |                                             ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]    Compiling memchr v0.1.7
[INFO] [stderr]    Compiling log v0.3.5
[INFO] [stderr]    Compiling aho-corasick v0.4.1
[INFO] [stderr]    Compiling regex v0.1.48
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0642`.
[INFO] [stderr] error: Could not compile `rustc-serialize`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "127cd58bdb3496f1f4adc35e59f2bc1128fd40a58d8f7dfec4c668e6f4ac7f72"`
[INFO] running `"docker" "rm" "-f" "127cd58bdb3496f1f4adc35e59f2bc1128fd40a58d8f7dfec4c668e6f4ac7f72"`
[INFO] [stdout] 127cd58bdb3496f1f4adc35e59f2bc1128fd40a58d8f7dfec4c668e6f4ac7f72