[INFO] updating cached repository https://github.com/roynalnaruto/rs_merkle_tree
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 62324ec83f33a6413fa0dead25dcb1d18e6ff2da
[INFO] testing roynalnaruto/rs_merkle_tree against master#8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e for pr-74409
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Froynalnaruto%2Frs_merkle_tree" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/roynalnaruto/rs_merkle_tree on toolchain 8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/roynalnaruto/rs_merkle_tree
[INFO] finished tweaking git repo https://github.com/roynalnaruto/rs_merkle_tree
[INFO] tweaked toml for git repo https://github.com/roynalnaruto/rs_merkle_tree written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/roynalnaruto/rs_merkle_tree already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-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@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c539d3541da26fe30567f3dde28faf8e26f07db0d7b3dcc1848241ad136d66ff
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "c539d3541da26fe30567f3dde28faf8e26f07db0d7b3dcc1848241ad136d66ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c539d3541da26fe30567f3dde28faf8e26f07db0d7b3dcc1848241ad136d66ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c539d3541da26fe30567f3dde28faf8e26f07db0d7b3dcc1848241ad136d66ff", kill_on_drop: false }`
[INFO] [stdout] c539d3541da26fe30567f3dde28faf8e26f07db0d7b3dcc1848241ad136d66ff
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-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@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 919cf0ce9c65be36aa6c50d8d39c1bc7b3cbbfc69ee4235f736af15ef9901cf4
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "919cf0ce9c65be36aa6c50d8d39c1bc7b3cbbfc69ee4235f736af15ef9901cf4", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.68
[INFO] [stderr]    Compiling gcc v0.3.55
[INFO] [stderr]    Compiling rust-crypto v0.2.36
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling time v0.1.42
[INFO] [stderr]    Compiling rand v0.3.23
[INFO] [stderr]    Compiling merkle_tree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct is never constructed: `MerkleTree`
[INFO] [stdout]   --> src/merkle_tree.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub struct MerkleTree<H, T>
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `root`
[INFO] [stdout]   --> src/merkle_tree.rs:42:8
[INFO] [stdout]    |
[INFO] [stdout] 42 |     fn root(&self) -> Result<&Node<T>, &'static str> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `count_leaves`
[INFO] [stdout]   --> src/merkle_tree.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 49 |     fn count_leaves(&self) -> Result<usize, &'static str> {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add_leaves`
[INFO] [stdout]   --> src/merkle_tree.rs:59:8
[INFO] [stdout]    |
[INFO] [stdout] 59 |     fn add_leaves(&mut self, values: &mut Vec<T>) {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_leaves`
[INFO] [stdout]   --> src/merkle_tree.rs:89:8
[INFO] [stdout]    |
[INFO] [stdout] 89 |     fn from_leaves(values: &mut Vec<T>, mut hasher: H) -> Result<Self, &'static str> {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `build_parent_nodes`
[INFO] [stdout]    --> src/merkle_tree.rs:121:8
[INFO] [stdout]     |
[INFO] [stdout] 121 |     fn build_parent_nodes(children: &Vec<Node<T>>, mut hasher: &mut H) -> Vec<Node<T>> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `as_leaf`
[INFO] [stdout]    --> src/merkle_tree.rs:140:8
[INFO] [stdout]     |
[INFO] [stdout] 140 |     fn as_leaf(v: &T, hasher: &mut H) -> Node<T> {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `as_internal`
[INFO] [stdout]    --> src/merkle_tree.rs:153:8
[INFO] [stdout]     |
[INFO] [stdout] 153 |     fn as_internal(left: &Node<T>, right: &Node<T>, hasher: &mut H) -> Node<T> {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 13.91s
[INFO] running `Command { std: "docker" "inspect" "919cf0ce9c65be36aa6c50d8d39c1bc7b3cbbfc69ee4235f736af15ef9901cf4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "919cf0ce9c65be36aa6c50d8d39c1bc7b3cbbfc69ee4235f736af15ef9901cf4", kill_on_drop: false }`
[INFO] [stdout] 919cf0ce9c65be36aa6c50d8d39c1bc7b3cbbfc69ee4235f736af15ef9901cf4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-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@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 9718ac054a22be17dfab38199bada792c1e907628b5b135f98a12863ad402bee
[INFO] running `Command { std: "docker" "start" "-a" "9718ac054a22be17dfab38199bada792c1e907628b5b135f98a12863ad402bee", kill_on_drop: false }`
[INFO] [stderr]    Compiling merkle_tree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct is never constructed: `MerkleTree`
[INFO] [stdout]   --> src/merkle_tree.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub struct MerkleTree<H, T>
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `root`
[INFO] [stdout]   --> src/merkle_tree.rs:42:8
[INFO] [stdout]    |
[INFO] [stdout] 42 |     fn root(&self) -> Result<&Node<T>, &'static str> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `count_leaves`
[INFO] [stdout]   --> src/merkle_tree.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 49 |     fn count_leaves(&self) -> Result<usize, &'static str> {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add_leaves`
[INFO] [stdout]   --> src/merkle_tree.rs:59:8
[INFO] [stdout]    |
[INFO] [stdout] 59 |     fn add_leaves(&mut self, values: &mut Vec<T>) {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_leaves`
[INFO] [stdout]   --> src/merkle_tree.rs:89:8
[INFO] [stdout]    |
[INFO] [stdout] 89 |     fn from_leaves(values: &mut Vec<T>, mut hasher: H) -> Result<Self, &'static str> {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `build_parent_nodes`
[INFO] [stdout]    --> src/merkle_tree.rs:121:8
[INFO] [stdout]     |
[INFO] [stdout] 121 |     fn build_parent_nodes(children: &Vec<Node<T>>, mut hasher: &mut H) -> Vec<Node<T>> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `as_leaf`
[INFO] [stdout]    --> src/merkle_tree.rs:140:8
[INFO] [stdout]     |
[INFO] [stdout] 140 |     fn as_leaf(v: &T, hasher: &mut H) -> Node<T> {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `as_internal`
[INFO] [stdout]    --> src/merkle_tree.rs:153:8
[INFO] [stdout]     |
[INFO] [stdout] 153 |     fn as_internal(left: &Node<T>, right: &Node<T>, hasher: &mut H) -> Node<T> {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.93s
[INFO] running `Command { std: "docker" "inspect" "9718ac054a22be17dfab38199bada792c1e907628b5b135f98a12863ad402bee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9718ac054a22be17dfab38199bada792c1e907628b5b135f98a12863ad402bee", kill_on_drop: false }`
[INFO] [stdout] 9718ac054a22be17dfab38199bada792c1e907628b5b135f98a12863ad402bee
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-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@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] ac54f92444e899782febb3b23deabba5531e04f6554351f3ecc8b4daf5964516
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "ac54f92444e899782febb3b23deabba5531e04f6554351f3ecc8b4daf5964516", kill_on_drop: false }`
[INFO] [stderr] warning: struct is never constructed: `MerkleTree`
[INFO] [stderr]   --> src/merkle_tree.rs:29:12
[INFO] [stderr]    |
[INFO] [stderr] 29 | pub struct MerkleTree<H, T>
[INFO] [stderr]    |            ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `root`
[INFO] [stderr]   --> src/merkle_tree.rs:42:8
[INFO] [stderr]    |
[INFO] [stderr] 42 |     fn root(&self) -> Result<&Node<T>, &'static str> {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `count_leaves`
[INFO] [stderr]   --> src/merkle_tree.rs:49:8
[INFO] [stderr]    |
[INFO] [stderr] 49 |     fn count_leaves(&self) -> Result<usize, &'static str> {
[INFO] [stderr]    |        ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `add_leaves`
[INFO] [stderr]   --> src/merkle_tree.rs:59:8
[INFO] [stderr]    |
[INFO] [stderr] 59 |     fn add_leaves(&mut self, values: &mut Vec<T>) {
[INFO] [stderr]    |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `from_leaves`
[INFO] [stderr]   --> src/merkle_tree.rs:89:8
[INFO] [stderr]    |
[INFO] [stderr] 89 |     fn from_leaves(values: &mut Vec<T>, mut hasher: H) -> Result<Self, &'static str> {
[INFO] [stderr]    |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `build_parent_nodes`
[INFO] [stderr]    --> src/merkle_tree.rs:121:8
[INFO] [stderr]     |
[INFO] [stderr] 121 |     fn build_parent_nodes(children: &Vec<Node<T>>, mut hasher: &mut H) -> Vec<Node<T>> {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `as_leaf`
[INFO] [stderr]    --> src/merkle_tree.rs:140:8
[INFO] [stderr]     |
[INFO] [stderr] 140 |     fn as_leaf(v: &T, hasher: &mut H) -> Node<T> {
[INFO] [stderr]     |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `as_internal`
[INFO] [stderr]    --> src/merkle_tree.rs:153:8
[INFO] [stderr]     |
[INFO] [stderr] 153 |     fn as_internal(left: &Node<T>, right: &Node<T>, hasher: &mut H) -> Node<T> {
[INFO] [stderr]     |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 8 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/merkle_tree-30c8997cdada38d1
[INFO] [stdout] running 5 tests
[INFO] [stdout] test merkle_tree::tests::test_add_leaves ... ok
[INFO] [stdout] test merkle_tree::tests::test_from_leaves_2n ... ok
[INFO] [stdout] test merkle_tree::tests::test_as_internal ... ok
[INFO] [stdout] test merkle_tree::tests::test_as_leaf ... ok
[INFO] [stderr]    Doc-tests merkle_tree
[INFO] [stdout] test merkle_tree::tests::test_from_leaves_not_2n ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[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 `Command { std: "docker" "inspect" "ac54f92444e899782febb3b23deabba5531e04f6554351f3ecc8b4daf5964516", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ac54f92444e899782febb3b23deabba5531e04f6554351f3ecc8b4daf5964516", kill_on_drop: false }`
[INFO] [stdout] ac54f92444e899782febb3b23deabba5531e04f6554351f3ecc8b4daf5964516