[INFO] crate mustache_view 0.1.0 is already in cache
[INFO] extracting crate mustache_view 0.1.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/mustache_view/0.1.0
[INFO] extracting crate mustache_view 0.1.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/mustache_view/0.1.0
[INFO] validating manifest of mustache_view-0.1.0 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 mustache_view-0.1.0 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 mustache_view-0.1.0
[INFO] finished frobbing mustache_view-0.1.0
[INFO] frobbed toml for mustache_view-0.1.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/mustache_view/0.1.0/Cargo.toml
[INFO] started frobbing mustache_view-0.1.0
[INFO] finished frobbing mustache_view-0.1.0
[INFO] frobbed toml for mustache_view-0.1.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/mustache_view/0.1.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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 mustache_view-0.1.0 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/reg/mustache_view/0.1.0:/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] 8814ad0257b595ffe4b1663e463e463d4adafbd618e7aea768ee4df76bc55b59
[INFO] running `"docker" "start" "-a" "8814ad0257b595ffe4b1663e463e463d4adafbd618e7aea768ee4df76bc55b59"`
[INFO] [stderr]    Compiling mustache v0.9.0
[INFO] [stderr]    Compiling mustache_view v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::io::Write`
[INFO] [stderr]  --> src/lib.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::io::Write;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0277]: the trait bound `T: serde::ser::Serialize` is not satisfied
[INFO] [stderr]   --> src/lib.rs:16:26
[INFO] [stderr]    |
[INFO] [stderr] 16 |                 template.render(&mut output, &data).unwrap();
[INFO] [stderr]    |                          ^^^^^^ the trait `serde::ser::Serialize` is not implemented for `T`
[INFO] [stderr]    |
[INFO] [stderr]    = help: consider adding a `where T: serde::ser::Serialize` bound
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0277`.
[INFO] [stderr] error: Could not compile `mustache_view`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "8814ad0257b595ffe4b1663e463e463d4adafbd618e7aea768ee4df76bc55b59"`
[INFO] running `"docker" "rm" "-f" "8814ad0257b595ffe4b1663e463e463d4adafbd618e7aea768ee4df76bc55b59"`
[INFO] [stdout] 8814ad0257b595ffe4b1663e463e463d4adafbd618e7aea768ee4df76bc55b59