[INFO] fetching crate todo-txt 1.3.0...
[INFO] extracting crate todo-txt 1.3.0 into work/ex/beta-1.37-6/sources/1.36.0/reg/todo-txt/1.3.0
[INFO] extracting crate todo-txt 1.3.0 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/todo-txt/1.3.0
[INFO] validating manifest of todo-txt-1.3.0 on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of todo-txt-1.3.0 on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "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-1.37-6/sources/1.36.0/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-1.37-6/sources/beta-2019-07-23/reg/todo-txt/1.3.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing todo-txt-1.3.0 against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] ffbd960dc26f0660dd935ff38c8cf6732c89614d4047f046a0a281066469b259
[INFO] running `"docker" "start" "-a" "ffbd960dc26f0660dd935ff38c8cf6732c89614d4047f046a0a281066469b259"`
[INFO] [stderr]    Compiling static_assertions v0.3.3
[INFO] [stderr]    Compiling nom v5.0.0
[INFO] [stderr]    Compiling stackvector v1.0.6
[INFO] [stderr]    Compiling lexical-core v0.4.3
[INFO] [stderr]    Compiling chrono v0.4.7
[INFO] [stderr]    Compiling todo-txt v1.3.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 10.38s
[INFO] running `"docker" "inspect" "ffbd960dc26f0660dd935ff38c8cf6732c89614d4047f046a0a281066469b259"`
[INFO] running `"docker" "rm" "-f" "ffbd960dc26f0660dd935ff38c8cf6732c89614d4047f046a0a281066469b259"`
[INFO] [stdout] ffbd960dc26f0660dd935ff38c8cf6732c89614d4047f046a0a281066469b259
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 1dade7e36402482fea249501227b4f820c822773163cea3a91e80b454babf9e1
[INFO] running `"docker" "start" "-a" "1dade7e36402482fea249501227b4f820c822773163cea3a91e80b454babf9e1"`
[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" "1dade7e36402482fea249501227b4f820c822773163cea3a91e80b454babf9e1"`
[INFO] running `"docker" "rm" "-f" "1dade7e36402482fea249501227b4f820c822773163cea3a91e80b454babf9e1"`
[INFO] [stdout] 1dade7e36402482fea249501227b4f820c822773163cea3a91e80b454babf9e1