[INFO] crate detour 0.7.0 is already in cache
[INFO] extracting crate detour 0.7.0 into work/ex/beta-1.37-6/sources/1.36.0/reg/detour/0.7.0
[INFO] extracting crate detour 0.7.0 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/detour/0.7.0
[INFO] validating manifest of detour-0.7.0 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 detour-0.7.0 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 detour-0.7.0
[INFO] removed 1 missing examples
[INFO] finished frobbing detour-0.7.0
[INFO] frobbed toml for detour-0.7.0 written to work/ex/beta-1.37-6/sources/1.36.0/reg/detour/0.7.0/Cargo.toml
[INFO] started frobbing detour-0.7.0
[INFO] removed 1 missing examples
[INFO] finished frobbing detour-0.7.0
[INFO] frobbed toml for detour-0.7.0 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/detour/0.7.0/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 detour-0.7.0 against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/detour/0.7.0:/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-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 3b2d4e458ec1b0086e43cf3b98af3a6a5d89430527d22a9c1e425d2f5fdef835
[INFO] running `"docker" "start" "-a" "3b2d4e458ec1b0086e43cf3b98af3a6a5d89430527d22a9c1e425d2f5fdef835"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling slice-pool v0.3.4
[INFO] [stderr]    Compiling libudis86-sys v0.2.1
[INFO] [stderr]    Compiling mmap-fixed v0.1.5
[INFO] [stderr]    Compiling region v2.1.2
[INFO] [stderr]    Compiling detour v0.7.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the beta release channel
[INFO] [stderr]  --> src/lib.rs:2:34
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![cfg_attr(feature = "nightly", feature(const_fn, unboxed_closures, abi_thiscall))]
[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 `detour`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "3b2d4e458ec1b0086e43cf3b98af3a6a5d89430527d22a9c1e425d2f5fdef835"`
[INFO] running `"docker" "rm" "-f" "3b2d4e458ec1b0086e43cf3b98af3a6a5d89430527d22a9c1e425d2f5fdef835"`
[INFO] [stdout] 3b2d4e458ec1b0086e43cf3b98af3a6a5d89430527d22a9c1e425d2f5fdef835