[INFO] crate lep 0.4.3 is already in cache
[INFO] extracting crate lep 0.4.3 into work/ex/beta-1.38-1/sources/1.37.0/reg/lep/0.4.3
[INFO] extracting crate lep 0.4.3 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/lep/0.4.3
[INFO] validating manifest of lep-0.4.3 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 lep-0.4.3 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 lep-0.4.3
[INFO] removed 2 missing examples
[INFO] finished frobbing lep-0.4.3
[INFO] frobbed toml for lep-0.4.3 written to work/ex/beta-1.38-1/sources/1.37.0/reg/lep/0.4.3/Cargo.toml
[INFO] started frobbing lep-0.4.3
[INFO] removed 2 missing examples
[INFO] finished frobbing lep-0.4.3
[INFO] frobbed toml for lep-0.4.3 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/lep/0.4.3/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] [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] testing lep-0.4.3 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-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/lep/0.4.3:/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] b406eb7e398d5f6d592fba7a96c941f892c15c6cc89190675556904e42054c90
[INFO] running `"docker" "start" "-a" "b406eb7e398d5f6d592fba7a96c941f892c15c6cc89190675556904e42054c90"`
[INFO] [stderr]    Compiling lep v0.4.3 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/eval.rs:40:13
[INFO] [stderr]    |
[INFO] [stderr] 40 |     Fun(&'f Fun),
[INFO] [stderr]    |             ^^^ help: use `dyn`: `dyn Fun`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/eval.rs:41:20
[INFO] [stderr]    |
[INFO] [stderr] 41 |     FunMut(&'f mut FunMut),
[INFO] [stderr]    |                    ^^^^^^ help: use `dyn`: `dyn FunMut`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/eval.rs:85:63
[INFO] [stderr]    |
[INFO] [stderr] 85 |     pub fn register_fun(&mut self, name: &'static str, f: &'f Fun) {
[INFO] [stderr]    |                                                               ^^^ help: use `dyn`: `dyn Fun`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/eval.rs:95:71
[INFO] [stderr]    |
[INFO] [stderr] 95 |     pub fn register_fun_mut(&mut self, name: &'static str, f: &'f mut FunMut) {
[INFO] [stderr]    |                                                                       ^^^^^^ help: use `dyn`: `dyn FunMut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.83s
[INFO] running `"docker" "inspect" "b406eb7e398d5f6d592fba7a96c941f892c15c6cc89190675556904e42054c90"`
[INFO] running `"docker" "rm" "-f" "b406eb7e398d5f6d592fba7a96c941f892c15c6cc89190675556904e42054c90"`
[INFO] [stdout] b406eb7e398d5f6d592fba7a96c941f892c15c6cc89190675556904e42054c90
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/lep/0.4.3:/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" "test" "--frozen" "--no-run"`
[INFO] [stdout] bc250185c328ad555bde6a8796f45230c02ba0659fe7ef0de3a2338bcb5ad72b
[INFO] running `"docker" "start" "-a" "bc250185c328ad555bde6a8796f45230c02ba0659fe7ef0de3a2338bcb5ad72b"`
[INFO] [stderr]    Compiling rustyline v3.0.0
[INFO] [stderr] error[E0283]: type annotations required: cannot resolve `std::string::String: std::convert::AsRef<_>`
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/rustyline-3.0.0/src/lib.rs:655:43
[INFO] [stderr]     |
[INFO] [stderr] 655 |             editor.add_history_entry(line.as_ref());
[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 E0283`.
[INFO] [stderr] error: Could not compile `rustyline`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "bc250185c328ad555bde6a8796f45230c02ba0659fe7ef0de3a2338bcb5ad72b"`
[INFO] running `"docker" "rm" "-f" "bc250185c328ad555bde6a8796f45230c02ba0659fe7ef0de3a2338bcb5ad72b"`
[INFO] [stdout] bc250185c328ad555bde6a8796f45230c02ba0659fe7ef0de3a2338bcb5ad72b