[INFO] updating cached repository botev/meta_diff
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/botev/meta_diff
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/botev/meta_diff" "work/ex/beta-1.37-6/sources/1.36.0/gh/botev/meta_diff"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/botev/meta_diff'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/botev/meta_diff" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/botev/meta_diff"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/botev/meta_diff'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 2499d7c5885f98324c3f8afe5cdede8c9b624104
[INFO] sha for GitHub repo botev/meta_diff: 2499d7c5885f98324c3f8afe5cdede8c9b624104
[INFO] validating manifest of botev/meta_diff 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 botev/meta_diff 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 botev/meta_diff
[INFO] finished frobbing botev/meta_diff
[INFO] frobbed toml for botev/meta_diff written to work/ex/beta-1.37-6/sources/1.36.0/gh/botev/meta_diff/Cargo.toml
[INFO] started frobbing botev/meta_diff
[INFO] finished frobbing botev/meta_diff
[INFO] frobbed toml for botev/meta_diff written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/botev/meta_diff/Cargo.toml
[INFO] crate botev/meta_diff already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/botev/meta_diff/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[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 botev/meta_diff 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-0/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/botev/meta_diff:/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] e36d06f091589bb5398cdef3e129c746881ff735dfc077504bf68140275992ab
[INFO] running `"docker" "start" "-a" "e36d06f091589bb5398cdef3e129c746881ff735dfc077504bf68140275992ab"`
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling syn v0.15.42
[INFO] [stderr]    Compiling serde v1.0.98
[INFO] [stderr]    Compiling strsim v0.9.2
[INFO] [stderr]    Compiling remove_dir_all v0.5.2
[INFO] [stderr]    Compiling regex-syntax v0.6.10
[INFO] [stderr]    Compiling aho-corasick v0.7.4
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling tempdir v0.3.7
[INFO] [stderr]    Compiling regex v1.2.0
[INFO] [stderr]    Compiling serde_derive v1.0.98
[INFO] [stderr]    Compiling docopt v1.1.0
[INFO] [stderr]    Compiling meta_diff v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] error[E0432]: unresolved import `std::dynamic_lib`
[INFO] [stderr]  --> src/linking.rs:3:10
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::dynamic_lib::DynamicLibrary;
[INFO] [stderr]   |          ^^^^^^^^^^^ could not find `dynamic_lib` in `std`
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(dynamic_lib)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0432, E0554.
[INFO] [stderr] For more information about an error, try `rustc --explain E0432`.
[INFO] [stderr] error: Could not compile `meta_diff`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "e36d06f091589bb5398cdef3e129c746881ff735dfc077504bf68140275992ab"`
[INFO] running `"docker" "rm" "-f" "e36d06f091589bb5398cdef3e129c746881ff735dfc077504bf68140275992ab"`
[INFO] [stdout] e36d06f091589bb5398cdef3e129c746881ff735dfc077504bf68140275992ab