[INFO] cloning repository CrimsonAndRed/MyLittleTree
[INFO] running `"git" "clone" "--bare" "git://github.com/CrimsonAndRed/MyLittleTree.git" "work/cache/sources/gh/CrimsonAndRed/MyLittleTree"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/CrimsonAndRed/MyLittleTree'...
[INFO] running `"git" "clone" "work/cache/sources/gh/CrimsonAndRed/MyLittleTree" "work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/CrimsonAndRed/MyLittleTree"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/CrimsonAndRed/MyLittleTree'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/CrimsonAndRed/MyLittleTree" "work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/CrimsonAndRed/MyLittleTree"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/CrimsonAndRed/MyLittleTree'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 78579106ceda8e62514cfb157392a5c603b54fdf
[INFO] sha for GitHub repo CrimsonAndRed/MyLittleTree: 78579106ceda8e62514cfb157392a5c603b54fdf
[INFO] validating manifest of CrimsonAndRed/MyLittleTree on toolchain master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of CrimsonAndRed/MyLittleTree on toolchain try#8f81d0bf6baf07b92f1246696722485c4ca0b049
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing CrimsonAndRed/MyLittleTree
[INFO] finished frobbing CrimsonAndRed/MyLittleTree
[INFO] frobbed toml for CrimsonAndRed/MyLittleTree written to work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/CrimsonAndRed/MyLittleTree/Cargo.toml
[INFO] started frobbing CrimsonAndRed/MyLittleTree
[INFO] finished frobbing CrimsonAndRed/MyLittleTree
[INFO] frobbed toml for CrimsonAndRed/MyLittleTree written to work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/CrimsonAndRed/MyLittleTree/Cargo.toml
[INFO] crate CrimsonAndRed/MyLittleTree already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking CrimsonAndRed/MyLittleTree against master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1 for pr-62008
[INFO] running `"docker" "create" "-v" "/mnt/big/ec2-user/crater/work/local/target-dirs/pr-62008/worker-3/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1:/opt/crater/target:rw,Z" "-v" "/mnt/big/ec2-user/crater/work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/CrimsonAndRed/MyLittleTree:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/ec2-user/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/ec2-user/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=forbid" "-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" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] ff1bececc2954b24e01dad63e73df63d2194bd5972ca8398e06fddf1bddaf1db
[INFO] running `"docker" "start" "-a" "ff1bececc2954b24e01dad63e73df63d2194bd5972ca8398e06fddf1bddaf1db"`
[INFO] [stderr]     Checking my_little_tree v1.0.0 (/opt/crater/workdir)
[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: 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]     Finished dev [unoptimized + debuginfo] target(s) in 0.72s
[INFO] running `"docker" "inspect" "ff1bececc2954b24e01dad63e73df63d2194bd5972ca8398e06fddf1bddaf1db"`
[INFO] running `"docker" "rm" "-f" "ff1bececc2954b24e01dad63e73df63d2194bd5972ca8398e06fddf1bddaf1db"`
[INFO] [stdout] ff1bececc2954b24e01dad63e73df63d2194bd5972ca8398e06fddf1bddaf1db