[INFO] updating cached repository https://github.com/CrimsonAndRed/MyLittleTree
[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] 78579106ceda8e62514cfb157392a5c603b54fdf
[INFO] testing CrimsonAndRed/MyLittleTree against try#03a1ea71b075ab964b5278bc6e74cd6c52c36ee0 for pr-74409
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCrimsonAndRed%2FMyLittleTree" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/CrimsonAndRed/MyLittleTree on toolchain 03a1ea71b075ab964b5278bc6e74cd6c52c36ee0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "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-3/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" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:d9fbb4e2287ab3795bdefaf705efb7541a8875c13bce71e067d6b01dc5ed759b" "/opt/rustwide/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "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] c22b7555931edc58d1335ff975ab07d792bfe1d565e7750ea4857749a148886c
[INFO] running `Command { std: "docker" "start" "-a" "c22b7555931edc58d1335ff975ab07d792bfe1d565e7750ea4857749a148886c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c22b7555931edc58d1335ff975ab07d792bfe1d565e7750ea4857749a148886c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c22b7555931edc58d1335ff975ab07d792bfe1d565e7750ea4857749a148886c", kill_on_drop: false }`
[INFO] [stdout] c22b7555931edc58d1335ff975ab07d792bfe1d565e7750ea4857749a148886c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:d9fbb4e2287ab3795bdefaf705efb7541a8875c13bce71e067d6b01dc5ed759b" "/opt/rustwide/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 739a4f7c913396f67209e2c6100708e32f08947e88e5cb0ee33c2a347fec39cd
[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" "739a4f7c913396f67209e2c6100708e32f08947e88e5cb0ee33c2a347fec39cd", 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 0.43s
[INFO] running `Command { std: "docker" "inspect" "739a4f7c913396f67209e2c6100708e32f08947e88e5cb0ee33c2a347fec39cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "739a4f7c913396f67209e2c6100708e32f08947e88e5cb0ee33c2a347fec39cd", kill_on_drop: false }`
[INFO] [stdout] 739a4f7c913396f67209e2c6100708e32f08947e88e5cb0ee33c2a347fec39cd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:d9fbb4e2287ab3795bdefaf705efb7541a8875c13bce71e067d6b01dc5ed759b" "/opt/rustwide/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 99902772a4e5472d832cea5e9b0900107c791de4e6f379f082cb64ee502f7220
[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" "99902772a4e5472d832cea5e9b0900107c791de4e6f379f082cb64ee502f7220", 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 1.11s
[INFO] running `Command { std: "docker" "inspect" "99902772a4e5472d832cea5e9b0900107c791de4e6f379f082cb64ee502f7220", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "99902772a4e5472d832cea5e9b0900107c791de4e6f379f082cb64ee502f7220", kill_on_drop: false }`
[INFO] [stdout] 99902772a4e5472d832cea5e9b0900107c791de4e6f379f082cb64ee502f7220
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:d9fbb4e2287ab3795bdefaf705efb7541a8875c13bce71e067d6b01dc5ed759b" "/opt/rustwide/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 05e69f14718b98dae3216b2a1b31686f0f3e89514ebfe36d073687bcfa6a9ac8
[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" "05e69f14718b98dae3216b2a1b31686f0f3e89514ebfe36d073687bcfa6a9ac8", kill_on_drop: false }`
[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 0.04s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/my_little_tree-0825f7008cdc2893
[INFO] [stdout] 
[INFO] [stdout] running 17 tests
[INFO] [stdout] test tests::empty_tree ... ok
[INFO] [stdout] test tests::delete_find ... ok
[INFO] [stdout] test tests::delete_node_both_l_same ... ok
[INFO] [stdout] test tests::delete_node_l ... ok
[INFO] [stdout] test tests::delete_node_both_l_diff ... ok
[INFO] [stdout] test tests::delete_root_both_diff ... ok
[INFO] [stdout] test tests::delete_node_both_r_diff ... ok
[INFO] [stdout] test tests::delete_root_l ... ok
[INFO] [stdout] test tests::delete_node_none ... ok
[INFO] [stdout] test tests::delete_root_none ... ok
[INFO] [stdout] test tests::delete_node_both_r_same ... ok
[INFO] [stdout] test tests::insert_find ... ok
[INFO] [stdout] test tests::delete_root_r ... ok
[INFO] [stderr]    Doc-tests my_little_tree
[INFO] [stdout] test tests::delete_root_both_same ... ok
[INFO] [stdout] test tests::delete_miss ... ok
[INFO] [stdout] test tests::delete_node_r ... 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
[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" "05e69f14718b98dae3216b2a1b31686f0f3e89514ebfe36d073687bcfa6a9ac8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "05e69f14718b98dae3216b2a1b31686f0f3e89514ebfe36d073687bcfa6a9ac8", kill_on_drop: false }`
[INFO] [stdout] 05e69f14718b98dae3216b2a1b31686f0f3e89514ebfe36d073687bcfa6a9ac8