[INFO] updating cached repository uhyo/crypto-rc4-impl
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/uhyo/crypto-rc4-impl
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/uhyo/crypto-rc4-impl" "work/ex/beta-1.37-6/sources/1.36.0/gh/uhyo/crypto-rc4-impl"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/uhyo/crypto-rc4-impl'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/uhyo/crypto-rc4-impl" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/uhyo/crypto-rc4-impl"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/uhyo/crypto-rc4-impl'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 0b83f75e5bae484445ca0dadadc0165203597ce7
[INFO] sha for GitHub repo uhyo/crypto-rc4-impl: 0b83f75e5bae484445ca0dadadc0165203597ce7
[INFO] validating manifest of uhyo/crypto-rc4-impl 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 uhyo/crypto-rc4-impl 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 uhyo/crypto-rc4-impl
[INFO] finished frobbing uhyo/crypto-rc4-impl
[INFO] frobbed toml for uhyo/crypto-rc4-impl written to work/ex/beta-1.37-6/sources/1.36.0/gh/uhyo/crypto-rc4-impl/Cargo.toml
[INFO] started frobbing uhyo/crypto-rc4-impl
[INFO] finished frobbing uhyo/crypto-rc4-impl
[INFO] frobbed toml for uhyo/crypto-rc4-impl written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/uhyo/crypto-rc4-impl/Cargo.toml
[INFO] crate uhyo/crypto-rc4-impl 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] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing uhyo/crypto-rc4-impl 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-4/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/uhyo/crypto-rc4-impl:/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] 3c9a02cf63f763f18a2e993149bec66cc94f4411cce06cce7cc3ac6b4477f357
[INFO] running `"docker" "start" "-a" "3c9a02cf63f763f18a2e993149bec66cc94f4411cce06cce7cc3ac6b4477f357"`
[INFO] [stderr]    Compiling getopts v0.2.14
[INFO] [stderr]    Compiling rand v0.3.15
[INFO] [stderr] warning[E0503]: cannot use `state` because it was mutably borrowed
[INFO] [stderr]     --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/getopts-0.2.14/src/lib.rs:1008:33
[INFO] [stderr]      |
[INFO] [stderr] 955  |     let mut machine = |cont: &mut bool, (i, c): (usize, char)| {
[INFO] [stderr]      |                       ---------------------------------------- borrow of `state` occurs here
[INFO] [stderr] ...
[INFO] [stderr] 959  |         state = match (state, whitespace, limit) {
[INFO] [stderr]      |                        ----- borrow occurs due to use of `state` in closure
[INFO] [stderr] ...
[INFO] [stderr] 1008 |     while cont && match state { B | C => true, A => false } {
[INFO] [stderr]      |                                 ^ use of borrowed `state`
[INFO] [stderr] 1009 |         machine(&mut cont, (fake_i, ' '));
[INFO] [stderr]      |         ------- borrow later used here
[INFO] [stderr]      |
[INFO] [stderr]      = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[INFO] [stderr]      = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[INFO] [stderr]      = note: for more information, try `rustc --explain E0729`
[INFO] [stderr] 
[INFO] [stderr]    Compiling rc4impl v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/distribution.rs:5:22
[INFO] [stderr]   |
[INFO] [stderr] 5 | fn dist20(iter: &mut Iterator<Item=u8>, result: &mut [Box<[i32; 256]>]){
[INFO] [stderr]   |                      ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item=u8>`
[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/distribution.rs:29:31
[INFO] [stderr]    |
[INFO] [stderr] 29 | fn dist_at(n: u32, iter: &mut Iterator<Item=u8>, result: &mut [i32; 256]){
[INFO] [stderr]    |                               ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item=u8>`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.10s
[INFO] running `"docker" "inspect" "3c9a02cf63f763f18a2e993149bec66cc94f4411cce06cce7cc3ac6b4477f357"`
[INFO] running `"docker" "rm" "-f" "3c9a02cf63f763f18a2e993149bec66cc94f4411cce06cce7cc3ac6b4477f357"`
[INFO] [stdout] 3c9a02cf63f763f18a2e993149bec66cc94f4411cce06cce7cc3ac6b4477f357
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/uhyo/crypto-rc4-impl:/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" "test" "--frozen" "--no-run"`
[INFO] [stdout] 799283bb77406b725f91d3cb33728a03dff4a8d74339868806bc36565c6c5bd3
[INFO] running `"docker" "start" "-a" "799283bb77406b725f91d3cb33728a03dff4a8d74339868806bc36565c6c5bd3"`
[INFO] [stderr]    Compiling rc4impl v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0425]: cannot find function `to_hex` in this scope
[INFO] [stderr]   --> src/lib.rs:29:19
[INFO] [stderr]    |
[INFO] [stderr] 29 |         let hex = to_hex(&message);
[INFO] [stderr]    |                   ^^^^^^ not found in this scope
[INFO] [stderr] help: possible candidate is found in another module, you can import it into scope
[INFO] [stderr]    |
[INFO] [stderr] 15 |     use hex::to_hex;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/distribution.rs:5:22
[INFO] [stderr]   |
[INFO] [stderr] 5 | fn dist20(iter: &mut Iterator<Item=u8>, result: &mut [Box<[i32; 256]>]){
[INFO] [stderr]   |                      ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item=u8>`
[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/distribution.rs:29:31
[INFO] [stderr]    |
[INFO] [stderr] 29 | fn dist_at(n: u32, iter: &mut Iterator<Item=u8>, result: &mut [i32; 256]){
[INFO] [stderr]    |                               ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item=u8>`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0425`.
[INFO] [stderr] error: Could not compile `rc4impl`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "799283bb77406b725f91d3cb33728a03dff4a8d74339868806bc36565c6c5bd3"`
[INFO] running `"docker" "rm" "-f" "799283bb77406b725f91d3cb33728a03dff4a8d74339868806bc36565c6c5bd3"`
[INFO] [stdout] 799283bb77406b725f91d3cb33728a03dff4a8d74339868806bc36565c6c5bd3