[INFO] cloning repository https://github.com/raiker/persistent-rope
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/raiker/persistent-rope" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fraiker%2Fpersistent-rope", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fraiker%2Fpersistent-rope'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7f638488c32998e1683a0a3ba8de4846c9a5dee7
[INFO] testing raiker/persistent-rope against master#5d5ff84130da0d74c6ece368dbe821d8f83fa526 for pr-79296
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fraiker%2Fpersistent-rope" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/raiker/persistent-rope on toolchain 5d5ff84130da0d74c6ece368dbe821d8f83fa526
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/raiker/persistent-rope
[INFO] finished tweaking git repo https://github.com/raiker/persistent-rope
[INFO] tweaked toml for git repo https://github.com/raiker/persistent-rope written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/raiker/persistent-rope already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "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" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "metadata" "--no-deps" "--format-version=1", 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] 3908f7b5da1f4497f869c2c5e246e4eef8faa775e0ea0d5e2f6c249bdf87d1be
[INFO] running `Command { std: "docker" "start" "-a" "3908f7b5da1f4497f869c2c5e246e4eef8faa775e0ea0d5e2f6c249bdf87d1be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3908f7b5da1f4497f869c2c5e246e4eef8faa775e0ea0d5e2f6c249bdf87d1be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3908f7b5da1f4497f869c2c5e246e4eef8faa775e0ea0d5e2f6c249bdf87d1be", kill_on_drop: false }`
[INFO] [stdout] 3908f7b5da1f4497f869c2c5e246e4eef8faa775e0ea0d5e2f6c249bdf87d1be
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "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" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "build" "--frozen" "--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] 0680584b5b5b2f8e54c798d7ba1e1170ccdb02d9b71aae87a6a1ba4f042f87ab
[INFO] running `Command { std: "docker" "start" "-a" "0680584b5b5b2f8e54c798d7ba1e1170ccdb02d9b71aae87a6a1ba4f042f87ab", kill_on_drop: false }`
[INFO] [stderr]    Compiling persistent-rope v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `parent`
[INFO] [stdout]    --> src/main.rs:141:69
[INFO] [stdout]     |
[INFO] [stdout] 141 | ...c<Option<TreeNode<K,V>>>, parent: Option<&Rc<Option<TreeNode<K,V>>>>) -> InsertionResultRecursion<K,V>{
[INFO] [stdout]     |                                 ^^^^^^ help: if this is intentional, prefix it with an underscore: `_parent`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `RcSliceableString`
[INFO] [stdout]  --> src/rcstr.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct RcSliceableString {
[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: `new`
[INFO] [stdout]   --> src/rcstr.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn new(s: String) -> RcSliceableString {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `slice`
[INFO] [stdout]   --> src/rcstr.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     pub fn slice(&self, start: usize, len: usize) -> RcSliceableString {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `as_str`
[INFO] [stdout]   --> src/rcstr.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |     pub fn as_str(&self) -> &str {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.05s
[INFO] running `Command { std: "docker" "inspect" "0680584b5b5b2f8e54c798d7ba1e1170ccdb02d9b71aae87a6a1ba4f042f87ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0680584b5b5b2f8e54c798d7ba1e1170ccdb02d9b71aae87a6a1ba4f042f87ab", kill_on_drop: false }`
[INFO] [stdout] 0680584b5b5b2f8e54c798d7ba1e1170ccdb02d9b71aae87a6a1ba4f042f87ab
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "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" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2be32fce5f956d195a65cbc39cdddf5fe556bb5ebaa8f04786652b8ea39c26e5
[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" "2be32fce5f956d195a65cbc39cdddf5fe556bb5ebaa8f04786652b8ea39c26e5", kill_on_drop: false }`
[INFO] [stderr]    Compiling persistent-rope v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `parent`
[INFO] [stdout]    --> src/main.rs:141:69
[INFO] [stdout]     |
[INFO] [stdout] 141 | ...c<Option<TreeNode<K,V>>>, parent: Option<&Rc<Option<TreeNode<K,V>>>>) -> InsertionResultRecursion<K,V>{
[INFO] [stdout]     |                                 ^^^^^^ help: if this is intentional, prefix it with an underscore: `_parent`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.09s
[INFO] running `Command { std: "docker" "inspect" "2be32fce5f956d195a65cbc39cdddf5fe556bb5ebaa8f04786652b8ea39c26e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2be32fce5f956d195a65cbc39cdddf5fe556bb5ebaa8f04786652b8ea39c26e5", kill_on_drop: false }`
[INFO] [stdout] 2be32fce5f956d195a65cbc39cdddf5fe556bb5ebaa8f04786652b8ea39c26e5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "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" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 73c5047010b17cb4086bd3236fe213b03a632b731b84c3bf2ef1b1e713421f61
[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" "73c5047010b17cb4086bd3236fe213b03a632b731b84c3bf2ef1b1e713421f61", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `parent`
[INFO] [stderr]    --> src/main.rs:141:69
[INFO] [stderr]     |
[INFO] [stderr] 141 | ...c<Option<TreeNode<K,V>>>, parent: Option<&Rc<Option<TreeNode<K,V>>>>) -> InsertionResultRecursion<K,V>{
[INFO] [stderr]     |                                 ^^^^^^ help: if this is intentional, prefix it with an underscore: `_parent`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/persistent_rope-e54eba09c3c9fd31
[INFO] [stdout] 
[INFO] [stdout] running 13 tests
[INFO] [stdout] test tests::test_insert_case1 ... ok
[INFO] [stdout] test tests::test_insert_case3_left_b ... ok
[INFO] [stdout] test tests::test_insert_case3_right_b ... ok
[INFO] [stdout] test tests::test_insert_case4_left ... ok
[INFO] [stdout] test tests::test_insert_case3_right_a ... ok
[INFO] [stdout] test tests::test_insert_case5_right ... ok
[INFO] [stdout] test tests::test_find ... ok
[INFO] [stdout] test rcstr::test::test_rc_sliceable_string ... ok
[INFO] [stdout] test tests::test_insert_case5_left ... ok
[INFO] [stdout] test tests::test_insert_case3_left_a ... ok
[INFO] [stdout] test tests::test_insert_case2_left ... ok
[INFO] [stdout] test tests::test_insert_case2_right ... ok
[INFO] [stdout] test tests::test_insert_case4_right ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 13 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "73c5047010b17cb4086bd3236fe213b03a632b731b84c3bf2ef1b1e713421f61", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "73c5047010b17cb4086bd3236fe213b03a632b731b84c3bf2ef1b1e713421f61", kill_on_drop: false }`
[INFO] [stdout] 73c5047010b17cb4086bd3236fe213b03a632b731b84c3bf2ef1b1e713421f61