[INFO] fetching crate rbtset 1.0.1...
[INFO] checking rbtset-1.0.1 against master#2748a9fd93dd1a00a4521f4f16de5befbf77f6cd for pr-62262-1
[INFO] extracting crate rbtset 1.0.1 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate rbtset 1.0.1 on toolchain 2748a9fd93dd1a00a4521f4f16de5befbf77f6cd
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate rbtset 1.0.1
[INFO] finished tweaking crates.io crate rbtset 1.0.1
[INFO] tweaked toml for crates.io crate rbtset 1.0.1 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "/opt/rustwide/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 043a7b3480c1cca9b6d853bd96bdca2e7bf552731a9b5ea0d9e00660447745ef
[INFO] running `"docker" "start" "-a" "043a7b3480c1cca9b6d853bd96bdca2e7bf552731a9b5ea0d9e00660447745ef"`
[INFO] [stderr]     Checking rbtset v1.0.1 (/opt/rustwide/workdir)
[INFO] [stderr] warning: cannot borrow `*self` as mutable because it is also borrowed as immutable
[INFO] [stderr]    --> src/tree.rs:237:13
[INFO] [stderr]     |
[INFO] [stderr] 236 |         let node = if let Some(ref root) = self.root {
[INFO] [stderr]     |                                -------- immutable borrow occurs here
[INFO] [stderr] 237 |             self.insert_from(root.duplicate(), data)
[INFO] [stderr]     |             ^^^^             ---- immutable borrow later used here
[INFO] [stderr]     |             |
[INFO] [stderr]     |             mutable borrow occurs 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/tree.rs:237:13
[INFO] [stderr]     |
[INFO] [stderr] 236 |         let node = if let Some(ref root) = self.root {
[INFO] [stderr]     |                                -------- immutable borrow occurs here
[INFO] [stderr] 237 |             self.insert_from(root.duplicate(), data)
[INFO] [stderr]     |             ^^^^             ---- immutable borrow later used here
[INFO] [stderr]     |             |
[INFO] [stderr]     |             mutable borrow occurs 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 1.84s
[INFO] running `"docker" "inspect" "043a7b3480c1cca9b6d853bd96bdca2e7bf552731a9b5ea0d9e00660447745ef"`
[INFO] running `"docker" "rm" "-f" "043a7b3480c1cca9b6d853bd96bdca2e7bf552731a9b5ea0d9e00660447745ef"`
[INFO] [stdout] 043a7b3480c1cca9b6d853bd96bdca2e7bf552731a9b5ea0d9e00660447745ef