[INFO] crate an 0.0.2 is already in cache
[INFO] extracting crate an 0.0.2 into work/ex/beta-1.38-1/sources/1.37.0/reg/an/0.0.2
[INFO] extracting crate an 0.0.2 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/an/0.0.2
[INFO] validating manifest of an-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 an-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 an-0.0.2
[INFO] finished frobbing an-0.0.2
[INFO] frobbed toml for an-0.0.2 written to work/ex/beta-1.38-1/sources/1.37.0/reg/an/0.0.2/Cargo.toml
[INFO] started frobbing an-0.0.2
[INFO] finished frobbing an-0.0.2
[INFO] frobbed toml for an-0.0.2 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/an/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 an-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-5/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/an/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] cc6ffb3c28f7ca0848cb926f24ac37b8703ff7aaba5a8e47cb7e227219df6012
[INFO] running `"docker" "start" "-a" "cc6ffb3c28f7ca0848cb926f24ac37b8703ff7aaba5a8e47cb7e227219df6012"`
[INFO] [stderr]    Compiling an v0.0.2 (/opt/crater/workdir)
[INFO] [stderr] error: cannot find attribute macro `experimental` in this scope
[INFO] [stderr]  --> src/lib.rs:5:3
[INFO] [stderr]   |
[INFO] [stderr] 5 | #[experimental]
[INFO] [stderr]   |   ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0405]: cannot find trait `Str` in this scope
[INFO] [stderr]  --> src/lib.rs:6:13
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn a<S: Str>(word: S) -> bool {
[INFO] [stderr]   |             ^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0405]: cannot find trait `Str` in this scope
[INFO] [stderr]   --> src/lib.rs:34:14
[INFO] [stderr]    |
[INFO] [stderr] 34 | pub fn an<S: Str>(word: S) -> bool {
[INFO] [stderr]    |              ^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0405`.
[INFO] [stderr] error: Could not compile `an`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "cc6ffb3c28f7ca0848cb926f24ac37b8703ff7aaba5a8e47cb7e227219df6012"`
[INFO] running `"docker" "rm" "-f" "cc6ffb3c28f7ca0848cb926f24ac37b8703ff7aaba5a8e47cb7e227219df6012"`
[INFO] [stdout] cc6ffb3c28f7ca0848cb926f24ac37b8703ff7aaba5a8e47cb7e227219df6012