[INFO] updating cached repository saresend/Gust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/saresend/Gust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/saresend/Gust" "work/ex/beta-1.38-1/sources/1.37.0/gh/saresend/Gust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/saresend/Gust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/saresend/Gust" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/saresend/Gust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/saresend/Gust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 175f78d47e65a12f66ec8244334e54814a08ec0b
[INFO] sha for GitHub repo saresend/Gust: 175f78d47e65a12f66ec8244334e54814a08ec0b
[INFO] validating manifest of saresend/Gust 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 saresend/Gust 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 saresend/Gust
[INFO] finished frobbing saresend/Gust
[INFO] frobbed toml for saresend/Gust written to work/ex/beta-1.38-1/sources/1.37.0/gh/saresend/Gust/Cargo.toml
[INFO] started frobbing saresend/Gust
[INFO] finished frobbing saresend/Gust
[INFO] frobbed toml for saresend/Gust written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/saresend/Gust/Cargo.toml
[INFO] crate saresend/Gust 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 saresend/Gust 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-0/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/saresend/Gust:/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] f9a3835b309aa20c10a3d7607f47319cd32f2a37508d48f4e9ed62e7292d3624
[INFO] running `"docker" "start" "-a" "f9a3835b309aa20c10a3d7607f47319cd32f2a37508d48f4e9ed62e7292d3624"`
[INFO] [stderr]    Compiling pulldown-cmark v0.1.0
[INFO] [stderr]    Compiling tempdir v0.3.5
[INFO] [stderr]    Compiling serde v1.0.24
[INFO] [stderr]    Compiling semver v0.8.0
[INFO] [stderr]    Compiling serde_json v1.0.8
[INFO] [stderr]    Compiling cargo_metadata v0.3.3
[INFO] [stderr]    Compiling skeptic v0.13.2
[INFO] [stderr]    Compiling liquid v0.13.3
[INFO] [stderr] error[E0283]: type annotations required: cannot resolve `std::string::String: std::convert::AsRef<_>`
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/liquid-0.13.3/src/compiler/parser.rs:84:80
[INFO] [stderr]    |
[INFO] [stderr] 84 |                     Token::Identifier(ref x) => indexes.push(Index::with_key(x.as_ref())),
[INFO] [stderr]    |                                                                                ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0283`.
[INFO] [stderr] error: Could not compile `liquid`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "f9a3835b309aa20c10a3d7607f47319cd32f2a37508d48f4e9ed62e7292d3624"`
[INFO] running `"docker" "rm" "-f" "f9a3835b309aa20c10a3d7607f47319cd32f2a37508d48f4e9ed62e7292d3624"`
[INFO] [stdout] f9a3835b309aa20c10a3d7607f47319cd32f2a37508d48f4e9ed62e7292d3624