[INFO] updating cached repository nuclearpesto/rust-binary-tree
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/nuclearpesto/rust-binary-tree
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/nuclearpesto/rust-binary-tree" "work/ex/beta-1.38-1/sources/1.37.0/gh/nuclearpesto/rust-binary-tree"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/nuclearpesto/rust-binary-tree'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/nuclearpesto/rust-binary-tree" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/nuclearpesto/rust-binary-tree"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/nuclearpesto/rust-binary-tree'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] e03f93f02462e0ed812e0d43f525598f29b072aa
[INFO] sha for GitHub repo nuclearpesto/rust-binary-tree: e03f93f02462e0ed812e0d43f525598f29b072aa
[INFO] validating manifest of nuclearpesto/rust-binary-tree 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 nuclearpesto/rust-binary-tree 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 nuclearpesto/rust-binary-tree
[INFO] finished frobbing nuclearpesto/rust-binary-tree
[INFO] frobbed toml for nuclearpesto/rust-binary-tree written to work/ex/beta-1.38-1/sources/1.37.0/gh/nuclearpesto/rust-binary-tree/Cargo.toml
[INFO] started frobbing nuclearpesto/rust-binary-tree
[INFO] finished frobbing nuclearpesto/rust-binary-tree
[INFO] frobbed toml for nuclearpesto/rust-binary-tree written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/nuclearpesto/rust-binary-tree/Cargo.toml
[INFO] crate nuclearpesto/rust-binary-tree already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing nuclearpesto/rust-binary-tree against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/nuclearpesto/rust-binary-tree:/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-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 1b5a174632df359bf50e8123c468f8a9916f6ba93dd06651c4e8598827bfa41d
[INFO] running `"docker" "start" "-a" "1b5a174632df359bf50e8123c468f8a9916f6ba93dd06651c4e8598827bfa41d"`
[INFO] [stderr]    Compiling binarytree v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning[E0170]: pattern binding `Less` is named the same as one of the variants of the type `std::cmp::Ordering`
[INFO] [stderr]   --> src/main.rs:55:17
[INFO] [stderr]    |
[INFO] [stderr] 55 |                 Less => {
[INFO] [stderr]    |                 ^^^^ help: to match on the variant, qualify the path: `std::cmp::Ordering::Less`
[INFO] [stderr] 
[INFO] [stderr] warning[E0170]: pattern binding `Equal` is named the same as one of the variants of the type `std::cmp::Ordering`
[INFO] [stderr]   --> src/main.rs:67:17
[INFO] [stderr]    |
[INFO] [stderr] 67 |                 Equal => {
[INFO] [stderr]    |                 ^^^^^ help: to match on the variant, qualify the path: `std::cmp::Ordering::Equal`
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable pattern
[INFO] [stderr]   --> src/main.rs:61:17
[INFO] [stderr]    |
[INFO] [stderr] 55 |                 Less => {
[INFO] [stderr]    |                 ---- matches any value
[INFO] [stderr] ...
[INFO] [stderr] 61 |                 More => {
[INFO] [stderr]    |                 ^^^^ unreachable pattern
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable pattern
[INFO] [stderr]   --> src/main.rs:67:17
[INFO] [stderr]    |
[INFO] [stderr] 55 |                 Less => {
[INFO] [stderr]    |                 ---- matches any value
[INFO] [stderr] ...
[INFO] [stderr] 67 |                 Equal => {
[INFO] [stderr]    |                 ^^^^^ unreachable pattern
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `Less`
[INFO] [stderr]   --> src/main.rs:55:17
[INFO] [stderr]    |
[INFO] [stderr] 55 |                 Less => {
[INFO] [stderr]    |                 ^^^^ help: consider prefixing with an underscore: `_Less`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `More`
[INFO] [stderr]   --> src/main.rs:61:17
[INFO] [stderr]    |
[INFO] [stderr] 61 |                 More => {
[INFO] [stderr]    |                 ^^^^ help: consider prefixing with an underscore: `_More`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `Equal`
[INFO] [stderr]   --> src/main.rs:67:17
[INFO] [stderr]    |
[INFO] [stderr] 67 |                 Equal => {
[INFO] [stderr]    |                 ^^^^^ help: consider prefixing with an underscore: `_Equal`
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `BTree`
[INFO] [stderr]  --> src/main.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub struct BTree {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `insert`
[INFO] [stderr]  --> src/main.rs:8:9
[INFO] [stderr]   |
[INFO] [stderr] 8 |         pub fn insert(tree: &BTree, key: &str) -> BTree {
[INFO] [stderr]   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/main.rs:13:9
[INFO] [stderr]    |
[INFO] [stderr] 13 |         pub fn new(key: &str) -> BTree {
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Node`
[INFO] [stderr]   --> src/main.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 |     struct Node {
[INFO] [stderr]    |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `insert`
[INFO] [stderr]   --> src/main.rs:28:9
[INFO] [stderr]    |
[INFO] [stderr] 28 |         pub fn insert(tree: &Option<Rc<Node>>, key: &str) -> (Option<Rc<Node>>) {
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `clone_node`
[INFO] [stderr]   --> src/main.rs:35:9
[INFO] [stderr]    |
[INFO] [stderr] 35 |         fn clone_node(node: &Option<Rc<Node>>) -> (Option<Rc<Node>>) {
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new_leaf`
[INFO] [stderr]   --> src/main.rs:41:9
[INFO] [stderr]    |
[INFO] [stderr] 41 |         fn new_leaf(key: &str) -> (Option<Rc<Node>>) {
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `tree_by_key`
[INFO] [stderr]   --> src/main.rs:49:9
[INFO] [stderr]    |
[INFO] [stderr] 49 |         fn tree_by_key(tree: &Rc<Node>, key: &str) -> (Option<Rc<Node>>) {
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable `Less` should have a snake case name
[INFO] [stderr]   --> src/main.rs:55:17
[INFO] [stderr]    |
[INFO] [stderr] 55 |                 Less => {
[INFO] [stderr]    |                 ^^^^ help: convert the identifier to snake case: `less`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `More` should have a snake case name
[INFO] [stderr]   --> src/main.rs:61:17
[INFO] [stderr]    |
[INFO] [stderr] 61 |                 More => {
[INFO] [stderr]    |                 ^^^^ help: convert the identifier to snake case: `more`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `Equal` should have a snake case name
[INFO] [stderr]   --> src/main.rs:67:17
[INFO] [stderr]    |
[INFO] [stderr] 67 |                 Equal => {
[INFO] [stderr]    |                 ^^^^^ help: convert the identifier to snake case: `equal`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.41s
[INFO] running `"docker" "inspect" "1b5a174632df359bf50e8123c468f8a9916f6ba93dd06651c4e8598827bfa41d"`
[INFO] running `"docker" "rm" "-f" "1b5a174632df359bf50e8123c468f8a9916f6ba93dd06651c4e8598827bfa41d"`
[INFO] [stdout] 1b5a174632df359bf50e8123c468f8a9916f6ba93dd06651c4e8598827bfa41d
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/nuclearpesto/rust-binary-tree:/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-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] 82406087b5513a2f7345283319b8691f0d1bd1824cf5ab15fc876bb4f1345113
[INFO] running `"docker" "start" "-a" "82406087b5513a2f7345283319b8691f0d1bd1824cf5ab15fc876bb4f1345113"`
[INFO] [stderr]    Compiling binarytree v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning[E0170]: pattern binding `Less` is named the same as one of the variants of the type `std::cmp::Ordering`
[INFO] [stderr]   --> src/main.rs:55:17
[INFO] [stderr]    |
[INFO] [stderr] 55 |                 Less => {
[INFO] [stderr]    |                 ^^^^ help: to match on the variant, qualify the path: `std::cmp::Ordering::Less`
[INFO] [stderr] 
[INFO] [stderr] warning[E0170]: pattern binding `Equal` is named the same as one of the variants of the type `std::cmp::Ordering`
[INFO] [stderr]   --> src/main.rs:67:17
[INFO] [stderr]    |
[INFO] [stderr] 67 |                 Equal => {
[INFO] [stderr]    |                 ^^^^^ help: to match on the variant, qualify the path: `std::cmp::Ordering::Equal`
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable pattern
[INFO] [stderr]   --> src/main.rs:61:17
[INFO] [stderr]    |
[INFO] [stderr] 55 |                 Less => {
[INFO] [stderr]    |                 ---- matches any value
[INFO] [stderr] ...
[INFO] [stderr] 61 |                 More => {
[INFO] [stderr]    |                 ^^^^ unreachable pattern
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable pattern
[INFO] [stderr]   --> src/main.rs:67:17
[INFO] [stderr]    |
[INFO] [stderr] 55 |                 Less => {
[INFO] [stderr]    |                 ---- matches any value
[INFO] [stderr] ...
[INFO] [stderr] 67 |                 Equal => {
[INFO] [stderr]    |                 ^^^^^ unreachable pattern
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `Less`
[INFO] [stderr]   --> src/main.rs:55:17
[INFO] [stderr]    |
[INFO] [stderr] 55 |                 Less => {
[INFO] [stderr]    |                 ^^^^ help: consider prefixing with an underscore: `_Less`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `More`
[INFO] [stderr]   --> src/main.rs:61:17
[INFO] [stderr]    |
[INFO] [stderr] 61 |                 More => {
[INFO] [stderr]    |                 ^^^^ help: consider prefixing with an underscore: `_More`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `Equal`
[INFO] [stderr]   --> src/main.rs:67:17
[INFO] [stderr]    |
[INFO] [stderr] 67 |                 Equal => {
[INFO] [stderr]    |                 ^^^^^ help: consider prefixing with an underscore: `_Equal`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `Less` should have a snake case name
[INFO] [stderr]   --> src/main.rs:55:17
[INFO] [stderr]    |
[INFO] [stderr] 55 |                 Less => {
[INFO] [stderr]    |                 ^^^^ help: convert the identifier to snake case: `less`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `More` should have a snake case name
[INFO] [stderr]   --> src/main.rs:61:17
[INFO] [stderr]    |
[INFO] [stderr] 61 |                 More => {
[INFO] [stderr]    |                 ^^^^ help: convert the identifier to snake case: `more`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `Equal` should have a snake case name
[INFO] [stderr]   --> src/main.rs:67:17
[INFO] [stderr]    |
[INFO] [stderr] 67 |                 Equal => {
[INFO] [stderr]    |                 ^^^^^ help: convert the identifier to snake case: `equal`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.61s
[INFO] running `"docker" "inspect" "82406087b5513a2f7345283319b8691f0d1bd1824cf5ab15fc876bb4f1345113"`
[INFO] running `"docker" "rm" "-f" "82406087b5513a2f7345283319b8691f0d1bd1824cf5ab15fc876bb4f1345113"`
[INFO] [stdout] 82406087b5513a2f7345283319b8691f0d1bd1824cf5ab15fc876bb4f1345113
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/nuclearpesto/rust-binary-tree:/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-2019-08-13" "test" "--frozen"`
[INFO] [stdout] 4e3e53bae0a23b506db6fac1f848eb5802b5961f30a464b3a435a559562f51f8
[INFO] running `"docker" "start" "-a" "4e3e53bae0a23b506db6fac1f848eb5802b5961f30a464b3a435a559562f51f8"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/binarytree-6667811ef8055d62
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test tree::test::new_btree_works ... ok
[INFO] [stdout] test tree::test::insert_one_works ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "4e3e53bae0a23b506db6fac1f848eb5802b5961f30a464b3a435a559562f51f8"`
[INFO] running `"docker" "rm" "-f" "4e3e53bae0a23b506db6fac1f848eb5802b5961f30a464b3a435a559562f51f8"`
[INFO] [stdout] 4e3e53bae0a23b506db6fac1f848eb5802b5961f30a464b3a435a559562f51f8