[INFO] crate termbook 1.4.1 is already in cache
[INFO] extracting crate termbook 1.4.1 into work/ex/beta-1.38-1/sources/1.37.0/reg/termbook/1.4.1
[INFO] extracting crate termbook 1.4.1 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/termbook/1.4.1
[INFO] validating manifest of termbook-1.4.1 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 termbook-1.4.1 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 termbook-1.4.1
[INFO] finished frobbing termbook-1.4.1
[INFO] frobbed toml for termbook-1.4.1 written to work/ex/beta-1.38-1/sources/1.37.0/reg/termbook/1.4.1/Cargo.toml
[INFO] started frobbing termbook-1.4.1
[INFO] finished frobbing termbook-1.4.1
[INFO] frobbed toml for termbook-1.4.1 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/termbook/1.4.1/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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing termbook-1.4.1 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-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/termbook/1.4.1:/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] 778cace1ae05b2515a5b59608e1a68ff6024ea9d838231fa4f23c7b24bfabe9c
[INFO] running `"docker" "start" "-a" "778cace1ae05b2515a5b59608e1a68ff6024ea9d838231fa4f23c7b24bfabe9c"`
[INFO] [stderr]    Compiling is-match v0.1.0
[INFO] [stderr]    Compiling pulldown-cmark v0.1.2
[INFO] [stderr]    Compiling toml v0.4.10
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling pulldown-cmark v0.5.3
[INFO] [stderr]    Compiling serde_urlencoded v0.5.5
[INFO] [stderr]    Compiling immeta v0.3.6
[INFO] [stderr]    Compiling strum_macros v0.15.0
[INFO] [stderr]    Compiling handlebars v0.32.4
[INFO] [stderr]    Compiling crossbeam-epoch v0.7.2
[INFO] [stderr]    Compiling globset v0.3.0
[INFO] [stderr]    Compiling ws v0.7.9
[INFO] [stderr]    Compiling notify v4.0.12
[INFO] [stderr]    Compiling string_cache_codegen v0.4.2
[INFO] [stderr]    Compiling mdbook v0.1.8
[INFO] [stderr]    Compiling clap v2.33.0
[INFO] [stderr]    Compiling crossbeam-deque v0.7.1
[INFO] [stderr]    Compiling toml-query v0.6.0
[INFO] [stderr]    Compiling pulldown-cmark-to-cmark v1.2.2
[INFO] [stderr]    Compiling string_cache v0.7.3
[INFO] [stderr]    Compiling markup5ever v0.7.5
[INFO] [stderr]    Compiling elasticlunr-rs v2.3.6
[INFO] [stderr]    Compiling tokio-threadpool v0.1.15
[INFO] [stderr]    Compiling tokio-fs v0.1.6
[INFO] [stderr]    Compiling tokio v0.1.22
[INFO] [stderr]    Compiling tokio-core v0.1.17
[INFO] [stderr]    Compiling html5ever v0.22.5
[INFO] [stderr]    Compiling hyper v0.11.27
[INFO] [stderr]    Compiling tokio-tls v0.1.4
[INFO] [stderr]    Compiling ammonia v1.2.0
[INFO] [stderr]    Compiling hyper-tls v0.1.4
[INFO] [stderr]    Compiling reqwest v0.8.8
[INFO] [stderr]    Compiling mdcat v0.8.0
[INFO] [stderr]    Compiling termbook v1.4.1 (/opt/crater/workdir)
[INFO] [stderr] error[E0277]: the trait bound `pulldown_cmark::Event<'_>: std::borrow::Borrow<pulldown_cmark::parse::Event<'_>>` is not satisfied
[INFO] [stderr]    --> src/preprocess.rs:284:13
[INFO] [stderr]     |
[INFO] [stderr] 284 |             cmark(parser, &mut md, None).map_err(|e| format!("{}", e))?;
[INFO] [stderr]     |             ^^^^^ the trait `std::borrow::Borrow<pulldown_cmark::parse::Event<'_>>` is not implemented for `pulldown_cmark::Event<'_>`
[INFO] [stderr]     |
[INFO] [stderr]     = note: required by `pulldown_cmark_to_cmark::fmt::cmark`
[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 `termbook`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "778cace1ae05b2515a5b59608e1a68ff6024ea9d838231fa4f23c7b24bfabe9c"`
[INFO] running `"docker" "rm" "-f" "778cace1ae05b2515a5b59608e1a68ff6024ea9d838231fa4f23c7b24bfabe9c"`
[INFO] [stdout] 778cace1ae05b2515a5b59608e1a68ff6024ea9d838231fa4f23c7b24bfabe9c