[INFO] crate libalpm-utils 0.0.2 is already in cache
[INFO] extracting crate libalpm-utils 0.0.2 into work/ex/beta-1.38-1/sources/1.37.0/reg/libalpm-utils/0.0.2
[INFO] extracting crate libalpm-utils 0.0.2 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/libalpm-utils/0.0.2
[INFO] validating manifest of libalpm-utils-0.0.2 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 libalpm-utils-0.0.2 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 libalpm-utils-0.0.2
[INFO] finished frobbing libalpm-utils-0.0.2
[INFO] frobbed toml for libalpm-utils-0.0.2 written to work/ex/beta-1.38-1/sources/1.37.0/reg/libalpm-utils/0.0.2/Cargo.toml
[INFO] started frobbing libalpm-utils-0.0.2
[INFO] finished frobbing libalpm-utils-0.0.2
[INFO] frobbed toml for libalpm-utils-0.0.2 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/libalpm-utils/0.0.2/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 libalpm-utils-0.0.2 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/libalpm-utils/0.0.2:/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] 8951976b07ae29bd8309d6bdb0dad60625c00cf2370ebfe6a596f36f93be6813
[INFO] running `"docker" "start" "-a" "8951976b07ae29bd8309d6bdb0dad60625c00cf2370ebfe6a596f36f93be6813"`
[INFO] [stderr]    Compiling libalpm-utils v0.0.2 (/opt/crater/workdir)
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/ini.rs:32:1
[INFO] [stderr]    |
[INFO] [stderr] 32 |   /// Matches a header line
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 33 | / named!(parse_header<&str, &str>, do_parse!(
[INFO] [stderr] 34 | |     tag!("[") >>
[INFO] [stderr] 35 | |     inner: take_until!("]") >>
[INFO] [stderr] 36 | |     tag!("]") >>
[INFO] [stderr] 37 | |     (inner.trim())
[INFO] [stderr] 38 | | ));
[INFO] [stderr]    | |___- rustdoc does not generate documentation for macro expansions
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stderr]    = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/ini.rs:40:1
[INFO] [stderr]    |
[INFO] [stderr] 40 |   /// Matches a key and the '='
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 41 | / named!(parse_key<&str, &str>, do_parse!(
[INFO] [stderr] 42 | |     key: take_until!("=") >>
[INFO] [stderr] 43 | |     tag!("=") >>
[INFO] [stderr] 44 | |     (key.trim())
[INFO] [stderr] 45 | | ));
[INFO] [stderr]    | |___- rustdoc does not generate documentation for macro expansions
[INFO] [stderr]    |
[INFO] [stderr]    = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(trace_macros)]
[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 E0554`.
[INFO] [stderr] error: Could not compile `libalpm-utils`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "8951976b07ae29bd8309d6bdb0dad60625c00cf2370ebfe6a596f36f93be6813"`
[INFO] running `"docker" "rm" "-f" "8951976b07ae29bd8309d6bdb0dad60625c00cf2370ebfe6a596f36f93be6813"`
[INFO] [stdout] 8951976b07ae29bd8309d6bdb0dad60625c00cf2370ebfe6a596f36f93be6813