[INFO] updating cached repository https://github.com/jramos14/Binary-Search-Tree
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 8c5598a68c35fb07150343623512accd0811a259
[INFO] testing jramos14/Binary-Search-Tree against beta-2019-09-28 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjramos14%2FBinary-Search-Tree" "work/builds/worker-1/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jramos14/Binary-Search-Tree on toolchain beta-2019-09-28
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/jramos14/Binary-Search-Tree
[INFO] finished tweaking git repo https://github.com/jramos14/Binary-Search-Tree
[INFO] tweaked toml for git repo https://github.com/jramos14/Binary-Search-Tree written to work/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/jramos14/Binary-Search-Tree already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "build" "--frozen"`
[INFO] [stdout] efb5e4c980beacaa0291ba1b9f403f831140d9b866443aee391676cbc1e66a45
[INFO] running `"docker" "start" "-a" "efb5e4c980beacaa0291ba1b9f403f831140d9b866443aee391676cbc1e66a45"`
[INFO] [stderr]    Compiling your v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:228:29
[INFO] [stderr]     |
[INFO] [stderr] 228 |                         let mut result : &mut Vec<&'a T> = &mut left_node.preorder();
[INFO] [stderr]     |                             ----^^^^^^
[INFO] [stderr]     |                             |
[INFO] [stderr]     |                             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:247:29
[INFO] [stderr]     |
[INFO] [stderr] 247 |                         let mut result : &mut Vec<&'a T> = &mut right_node.preorder();
[INFO] [stderr]     |                             ----^^^^^^
[INFO] [stderr]     |                             |
[INFO] [stderr]     |                             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:277:21
[INFO] [stderr]     |
[INFO] [stderr] 277 |                 let mut result : &mut Vec<&'a T> = &mut left_node.inorder();
[INFO] [stderr]     |                     ----^^^^^^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:296:21
[INFO] [stderr]     |
[INFO] [stderr] 296 |                 let mut result : &mut Vec<&'a T> = &mut right_node.inorder();
[INFO] [stderr]     |                     ----^^^^^^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:318:25
[INFO] [stderr]     |
[INFO] [stderr] 318 |                     let mut result : &mut Vec<&'a T> = &mut left_node.postorder();
[INFO] [stderr]     |                         ----^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:337:25
[INFO] [stderr]     |
[INFO] [stderr] 337 |                     let mut result : &mut Vec<&'a T> = &mut right_node.postorder();
[INFO] [stderr]     |                         ----^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:223:29
[INFO] [stderr]     |
[INFO] [stderr] 223 |                         let mut result : &mut Vec<&'a T> = &mut left_node.preorder();
[INFO] [stderr]     |                             ----^^^^^^
[INFO] [stderr]     |                             |
[INFO] [stderr]     |                             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:242:29
[INFO] [stderr]     |
[INFO] [stderr] 242 |                         let mut result : &mut Vec<&'a T> = &mut right_node.preorder();
[INFO] [stderr]     |                             ----^^^^^^
[INFO] [stderr]     |                             |
[INFO] [stderr]     |                             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:272:21
[INFO] [stderr]     |
[INFO] [stderr] 272 |                 let mut result : &mut Vec<&'a T> = &mut left_node.inorder();
[INFO] [stderr]     |                     ----^^^^^^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:291:21
[INFO] [stderr]     |
[INFO] [stderr] 291 |                 let mut result : &mut Vec<&'a T> = &mut right_node.inorder();
[INFO] [stderr]     |                     ----^^^^^^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:313:25
[INFO] [stderr]     |
[INFO] [stderr] 313 |                     let mut result : &mut Vec<&'a T> = &mut left_node.postorder();
[INFO] [stderr]     |                         ----^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:332:25
[INFO] [stderr]     |
[INFO] [stderr] 332 |                     let mut result : &mut Vec<&'a T> = &mut right_node.postorder();
[INFO] [stderr]     |                         ----^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.00s
[INFO] running `"docker" "inspect" "efb5e4c980beacaa0291ba1b9f403f831140d9b866443aee391676cbc1e66a45"`
[INFO] running `"docker" "rm" "-f" "efb5e4c980beacaa0291ba1b9f403f831140d9b866443aee391676cbc1e66a45"`
[INFO] [stdout] efb5e4c980beacaa0291ba1b9f403f831140d9b866443aee391676cbc1e66a45
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "test" "--frozen" "--no-run"`
[INFO] [stdout] e88a8c98c771bdb4aaf3feb4ac6a49f0e5093b8064eafb75b9e686f9d6812bc7
[INFO] running `"docker" "start" "-a" "e88a8c98c771bdb4aaf3feb4ac6a49f0e5093b8064eafb75b9e686f9d6812bc7"`
[INFO] [stderr]    Compiling your v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:228:29
[INFO] [stderr]     |
[INFO] [stderr] 228 |                         let mut result : &mut Vec<&'a T> = &mut left_node.preorder();
[INFO] [stderr]     |                             ----^^^^^^
[INFO] [stderr]     |                             |
[INFO] [stderr]     |                             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:247:29
[INFO] [stderr]     |
[INFO] [stderr] 247 |                         let mut result : &mut Vec<&'a T> = &mut right_node.preorder();
[INFO] [stderr]     |                             ----^^^^^^
[INFO] [stderr]     |                             |
[INFO] [stderr]     |                             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:277:21
[INFO] [stderr]     |
[INFO] [stderr] 277 |                 let mut result : &mut Vec<&'a T> = &mut left_node.inorder();
[INFO] [stderr]     |                     ----^^^^^^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:296:21
[INFO] [stderr]     |
[INFO] [stderr] 296 |                 let mut result : &mut Vec<&'a T> = &mut right_node.inorder();
[INFO] [stderr]     |                     ----^^^^^^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:318:25
[INFO] [stderr]     |
[INFO] [stderr] 318 |                     let mut result : &mut Vec<&'a T> = &mut left_node.postorder();
[INFO] [stderr]     |                         ----^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:337:25
[INFO] [stderr]     |
[INFO] [stderr] 337 |                     let mut result : &mut Vec<&'a T> = &mut right_node.postorder();
[INFO] [stderr]     |                         ----^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:223:29
[INFO] [stderr]     |
[INFO] [stderr] 223 |                         let mut result : &mut Vec<&'a T> = &mut left_node.preorder();
[INFO] [stderr]     |                             ----^^^^^^
[INFO] [stderr]     |                             |
[INFO] [stderr]     |                             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:242:29
[INFO] [stderr]     |
[INFO] [stderr] 242 |                         let mut result : &mut Vec<&'a T> = &mut right_node.preorder();
[INFO] [stderr]     |                             ----^^^^^^
[INFO] [stderr]     |                             |
[INFO] [stderr]     |                             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:272:21
[INFO] [stderr]     |
[INFO] [stderr] 272 |                 let mut result : &mut Vec<&'a T> = &mut left_node.inorder();
[INFO] [stderr]     |                     ----^^^^^^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:291:21
[INFO] [stderr]     |
[INFO] [stderr] 291 |                 let mut result : &mut Vec<&'a T> = &mut right_node.inorder();
[INFO] [stderr]     |                     ----^^^^^^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:313:25
[INFO] [stderr]     |
[INFO] [stderr] 313 |                     let mut result : &mut Vec<&'a T> = &mut left_node.postorder();
[INFO] [stderr]     |                         ----^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:332:25
[INFO] [stderr]     |
[INFO] [stderr] 332 |                     let mut result : &mut Vec<&'a T> = &mut right_node.postorder();
[INFO] [stderr]     |                         ----^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.51s
[INFO] running `"docker" "inspect" "e88a8c98c771bdb4aaf3feb4ac6a49f0e5093b8064eafb75b9e686f9d6812bc7"`
[INFO] running `"docker" "rm" "-f" "e88a8c98c771bdb4aaf3feb4ac6a49f0e5093b8064eafb75b9e686f9d6812bc7"`
[INFO] [stdout] e88a8c98c771bdb4aaf3feb4ac6a49f0e5093b8064eafb75b9e686f9d6812bc7
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "test" "--frozen"`
[INFO] [stdout] bbd4aef01b37ac9f62bbf728b379f5769859b4562f4c876587006a3869717494
[INFO] running `"docker" "start" "-a" "bbd4aef01b37ac9f62bbf728b379f5769859b4562f4c876587006a3869717494"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.00s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/your-238f1b17f46bf894
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/your-5fbb4f557899895c
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests your
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "bbd4aef01b37ac9f62bbf728b379f5769859b4562f4c876587006a3869717494"`
[INFO] running `"docker" "rm" "-f" "bbd4aef01b37ac9f62bbf728b379f5769859b4562f4c876587006a3869717494"`
[INFO] [stdout] bbd4aef01b37ac9f62bbf728b379f5769859b4562f4c876587006a3869717494