[INFO] cloning repository https://github.com/CrimsonAndRed/MyLittleTree
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/CrimsonAndRed/MyLittleTree" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCrimsonAndRed%2FMyLittleTree", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCrimsonAndRed%2FMyLittleTree'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 78579106ceda8e62514cfb157392a5c603b54fdf
[INFO] testing CrimsonAndRed/MyLittleTree against beta-2021-01-01 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCrimsonAndRed%2FMyLittleTree" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/CrimsonAndRed/MyLittleTree on toolchain beta-2021-01-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/CrimsonAndRed/MyLittleTree
[INFO] finished tweaking git repo https://github.com/CrimsonAndRed/MyLittleTree
[INFO] tweaked toml for git repo https://github.com/CrimsonAndRed/MyLittleTree written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/CrimsonAndRed/MyLittleTree already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 71a41ebe6295ee726ee30b95eefe159b95a0bc62b635548f0ec3c0f15ce034a7
[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" "71a41ebe6295ee726ee30b95eefe159b95a0bc62b635548f0ec3c0f15ce034a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "71a41ebe6295ee726ee30b95eefe159b95a0bc62b635548f0ec3c0f15ce034a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "71a41ebe6295ee726ee30b95eefe159b95a0bc62b635548f0ec3c0f15ce034a7", kill_on_drop: false }`
[INFO] [stdout] 71a41ebe6295ee726ee30b95eefe159b95a0bc62b635548f0ec3c0f15ce034a7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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=warn" "-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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a59e871e42e45f19d48cf38c4adc1a40f7370a53e2055067d36e3aaca92063cf
[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" "a59e871e42e45f19d48cf38c4adc1a40f7370a53e2055067d36e3aaca92063cf", kill_on_drop: false }`
[INFO] [stderr]    Compiling my_little_tree v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: cannot borrow `*self` as mutable because it is also borrowed as immutable
[INFO] [stdout]    --> src/lib.rs:108:27
[INFO] [stdout]     |
[INFO] [stdout] 102 |         match &self.root {
[INFO] [stdout]     |               ---------- immutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 108 |             Some(link) => self.inner_insert(new_node, Rc::clone(&link)),
[INFO] [stdout]     |                           ^^^^ mutable borrow occurs here       ----- immutable borrow later used here
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stdout]     = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stdout]     = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.48s
[INFO] running `Command { std: "docker" "inspect" "a59e871e42e45f19d48cf38c4adc1a40f7370a53e2055067d36e3aaca92063cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a59e871e42e45f19d48cf38c4adc1a40f7370a53e2055067d36e3aaca92063cf", kill_on_drop: false }`
[INFO] [stdout] a59e871e42e45f19d48cf38c4adc1a40f7370a53e2055067d36e3aaca92063cf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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=warn" "-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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 340562f6a56b506259e87e2abc63a2f1898f555183e809872f7c22b9212945fd
[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" "340562f6a56b506259e87e2abc63a2f1898f555183e809872f7c22b9212945fd", kill_on_drop: false }`
[INFO] [stdout] warning: cannot borrow `*self` as mutable because it is also borrowed as immutable
[INFO] [stdout]    --> src/lib.rs:108:27
[INFO] [stdout]     |
[INFO] [stdout] 102 |         match &self.root {
[INFO] [stdout]     |               ---------- immutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 108 |             Some(link) => self.inner_insert(new_node, Rc::clone(&link)),
[INFO] [stdout]     |                           ^^^^ mutable borrow occurs here       ----- immutable borrow later used here
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stdout]     = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stdout]     = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling my_little_tree v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: cannot borrow `*self` as mutable because it is also borrowed as immutable
[INFO] [stdout]    --> src/lib.rs:108:27
[INFO] [stdout]     |
[INFO] [stdout] 102 |         match &self.root {
[INFO] [stdout]     |               ---------- immutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 108 |             Some(link) => self.inner_insert(new_node, Rc::clone(&link)),
[INFO] [stdout]     |                           ^^^^ mutable borrow occurs here       ----- immutable borrow later used here
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stdout]     = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stdout]     = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.54s
[INFO] running `Command { std: "docker" "inspect" "340562f6a56b506259e87e2abc63a2f1898f555183e809872f7c22b9212945fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "340562f6a56b506259e87e2abc63a2f1898f555183e809872f7c22b9212945fd", kill_on_drop: false }`
[INFO] [stdout] 340562f6a56b506259e87e2abc63a2f1898f555183e809872f7c22b9212945fd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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=warn" "-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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 5d59e78d1d09bdb7856455582d03cb4f644dc834aecc7e437fcf14fffc781cc7
[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" "5d59e78d1d09bdb7856455582d03cb4f644dc834aecc7e437fcf14fffc781cc7", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: cannot borrow `*self` as mutable because it is also borrowed as immutable
[INFO] [stderr]    --> src/lib.rs:108:27
[INFO] [stderr]     |
[INFO] [stderr] 102 |         match &self.root {
[INFO] [stderr]     |               ---------- immutable borrow occurs here
[INFO] [stderr] ...
[INFO] [stderr] 108 |             Some(link) => self.inner_insert(new_node, Rc::clone(&link)),
[INFO] [stderr]     |                           ^^^^ mutable borrow occurs here       ----- immutable borrow later used here
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stderr]     = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stderr]     = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: cannot borrow `*self` as mutable because it is also borrowed as immutable
[INFO] [stderr]    --> src/lib.rs:108:27
[INFO] [stderr]     |
[INFO] [stderr] 102 |         match &self.root {
[INFO] [stderr]     |               ---------- immutable borrow occurs here
[INFO] [stderr] ...
[INFO] [stderr] 108 |             Some(link) => self.inner_insert(new_node, Rc::clone(&link)),
[INFO] [stderr]     |                           ^^^^ mutable borrow occurs here       ----- immutable borrow later used here
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stderr]     = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stderr]     = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.49s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/my_little_tree-a86b0b597bf098da
[INFO] [stdout] 
[INFO] [stdout] running 17 tests
[INFO] [stdout] test tests::delete_miss ... ok
[INFO] [stdout] test tests::delete_find ... ok
[INFO] [stdout] test tests::delete_node_both_l_same ... ok
[INFO] [stdout] test tests::delete_node_both_l_diff ... ok
[INFO] [stdout] test tests::delete_root_none ... ok
[INFO] [stdout] test tests::insert_find ... ok
[INFO] [stdout] test tests::delete_node_l ... ok
[INFO] [stdout] test tests::delete_root_r ... ok
[INFO] [stdout] test tests::delete_node_r ... ok
[INFO] [stderr]    Doc-tests my_little_tree
[INFO] [stdout] test tests::delete_node_none ... ok
[INFO] [stdout] test tests::delete_node_both_r_same ... ok
[INFO] [stdout] test tests::delete_node_both_r_diff ... ok
[INFO] [stdout] test tests::delete_root_both_diff ... ok
[INFO] [stdout] test tests::delete_root_l ... ok
[INFO] [stdout] test tests::empty_tree ... ok
[INFO] [stdout] test tests::delete_root_both_same ... ok
[INFO] [stdout] test tests::iterate ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 17 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.08s
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "5d59e78d1d09bdb7856455582d03cb4f644dc834aecc7e437fcf14fffc781cc7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5d59e78d1d09bdb7856455582d03cb4f644dc834aecc7e437fcf14fffc781cc7", kill_on_drop: false }`
[INFO] [stdout] 5d59e78d1d09bdb7856455582d03cb4f644dc834aecc7e437fcf14fffc781cc7