[INFO] crate todo-txt 1.3.0 is already in cache
[INFO] extracting crate todo-txt 1.3.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/todo-txt/1.3.0
[INFO] extracting crate todo-txt 1.3.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/todo-txt/1.3.0
[INFO] validating manifest of todo-txt-1.3.0 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 todo-txt-1.3.0 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 todo-txt-1.3.0
[INFO] removed 1 missing examples
[INFO] finished frobbing todo-txt-1.3.0
[INFO] frobbed toml for todo-txt-1.3.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/todo-txt/1.3.0/Cargo.toml
[INFO] started frobbing todo-txt-1.3.0
[INFO] removed 1 missing examples
[INFO] finished frobbing todo-txt-1.3.0
[INFO] frobbed toml for todo-txt-1.3.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/todo-txt/1.3.0/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 todo-txt-1.3.0 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-7/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/todo-txt/1.3.0:/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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 0ea97f611045daa5f411a6c0a2f769dfe221efd0d632357089725f50f2bec5a7
[INFO] running `"docker" "start" "-a" "0ea97f611045daa5f411a6c0a2f769dfe221efd0d632357089725f50f2bec5a7"`
[INFO] [stderr]    Compiling todo-txt v1.3.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.18s
[INFO] running `"docker" "inspect" "0ea97f611045daa5f411a6c0a2f769dfe221efd0d632357089725f50f2bec5a7"`
[INFO] running `"docker" "rm" "-f" "0ea97f611045daa5f411a6c0a2f769dfe221efd0d632357089725f50f2bec5a7"`
[INFO] [stdout] 0ea97f611045daa5f411a6c0a2f769dfe221efd0d632357089725f50f2bec5a7
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/todo-txt/1.3.0:/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" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] 22bf118e2ee31d6e0b2e1b2bf6984f14c62219b35d01c3d0a9c030647c328739
[INFO] running `"docker" "start" "-a" "22bf118e2ee31d6e0b2e1b2bf6984f14c62219b35d01c3d0a9c030647c328739"`
[INFO] [stderr]    Compiling todo-txt v1.3.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0277]: the trait bound `todo_txt::task::simple::Simple: serde::ser::Serialize` is not satisfied
[INFO] [stderr]  --> examples/serialization.rs:8:16
[INFO] [stderr]   |
[INFO] [stderr] 8 |     let json = serde_json::to_string(&task);
[INFO] [stderr]   |                ^^^^^^^^^^^^^^^^^^^^^ the trait `serde::ser::Serialize` is not implemented for `todo_txt::task::simple::Simple`
[INFO] [stderr]   |
[INFO] [stderr]   = note: required because of the requirements on the impl of `serde::ser::Serialize` for `std::result::Result<todo_txt::task::simple::Simple, ()>`
[INFO] [stderr]   = note: required by `serde_json::ser::to_string`
[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 `todo-txt`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "22bf118e2ee31d6e0b2e1b2bf6984f14c62219b35d01c3d0a9c030647c328739"`
[INFO] running `"docker" "rm" "-f" "22bf118e2ee31d6e0b2e1b2bf6984f14c62219b35d01c3d0a9c030647c328739"`
[INFO] [stdout] 22bf118e2ee31d6e0b2e1b2bf6984f14c62219b35d01c3d0a9c030647c328739