[INFO] crate rbtset 1.0.1 is already in cache
[INFO] extracting crate rbtset 1.0.1 into work/ex/beta-1.37-6/sources/1.36.0/reg/rbtset/1.0.1
[INFO] extracting crate rbtset 1.0.1 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/rbtset/1.0.1
[INFO] validating manifest of rbtset-1.0.1 on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of rbtset-1.0.1 on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing rbtset-1.0.1
[INFO] finished frobbing rbtset-1.0.1
[INFO] frobbed toml for rbtset-1.0.1 written to work/ex/beta-1.37-6/sources/1.36.0/reg/rbtset/1.0.1/Cargo.toml
[INFO] started frobbing rbtset-1.0.1
[INFO] finished frobbing rbtset-1.0.1
[INFO] frobbed toml for rbtset-1.0.1 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/rbtset/1.0.1/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing rbtset-1.0.1 against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/rbtset/1.0.1:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/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=warn" "-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" "+beta-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 5c328c348455775443f7ba4a20a90ac32a62079018d9e76f7a8b725c231a9d57
[INFO] running `"docker" "start" "-a" "5c328c348455775443f7ba4a20a90ac32a62079018d9e76f7a8b725c231a9d57"`
[INFO] [stderr]    Compiling rbtset v1.0.1 (/opt/crater/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]     Finished dev [unoptimized + debuginfo] target(s) in 0.41s
[INFO] running `"docker" "inspect" "5c328c348455775443f7ba4a20a90ac32a62079018d9e76f7a8b725c231a9d57"`
[INFO] running `"docker" "rm" "-f" "5c328c348455775443f7ba4a20a90ac32a62079018d9e76f7a8b725c231a9d57"`
[INFO] [stdout] 5c328c348455775443f7ba4a20a90ac32a62079018d9e76f7a8b725c231a9d57
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/rbtset/1.0.1:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/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=warn" "-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" "+beta-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] 907000a43393efb1e7d5aa82fe2f95b5d038d0e119b07a649a39d6df106d469a
[INFO] running `"docker" "start" "-a" "907000a43393efb1e7d5aa82fe2f95b5d038d0e119b07a649a39d6df106d469a"`
[INFO] [stderr]    Compiling rbtset v1.0.1 (/opt/crater/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]     Finished dev [unoptimized + debuginfo] target(s) in 1.62s
[INFO] running `"docker" "inspect" "907000a43393efb1e7d5aa82fe2f95b5d038d0e119b07a649a39d6df106d469a"`
[INFO] running `"docker" "rm" "-f" "907000a43393efb1e7d5aa82fe2f95b5d038d0e119b07a649a39d6df106d469a"`
[INFO] [stdout] 907000a43393efb1e7d5aa82fe2f95b5d038d0e119b07a649a39d6df106d469a
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/rbtset/1.0.1:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/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=warn" "-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" "+beta-2019-07-23" "test" "--frozen"`
[INFO] [stdout] fb6d57e1e6a0e8b25216206618b63fda143bb74de185371684015d0a176aa65e
[INFO] running `"docker" "start" "-a" "fb6d57e1e6a0e8b25216206618b63fda143bb74de185371684015d0a176aa65e"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rbtset-04a639377f069284
[INFO] [stdout] 
[INFO] [stdout] running 10 tests
[INFO] [stdout] test tree::tests::delete_pseudoleaves ... ok
[INFO] [stdout] test tree::tests::clone ... ok
[INFO] [stdout] test tree::tests::repack ... ok
[INFO] [stdout] test tree::tests::insert ... ok
[INFO] [stdout] test tree::tests::iterator ... ok
[INFO] [stdout] test tree::tests::rotate_right_parent ... ok
[INFO] [stdout] test tree::tests::rotate_left_root ... ok
[INFO] [stdout] test tree::tests::rotate_left_parent ... ok
[INFO] [stdout] test tree::tests::rotate_right_root ... ok
[INFO] [stderr]    Doc-tests rbtset
[INFO] [stdout] test tree::tests::delete ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 10 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 18 tests
[INFO] [stdout] test src/lib.rs - Consecutive (line 22) ... ok
[INFO] [stdout] test src/tree.rs - tree::RBTreeSet<T>::clear (line 275) ... ok
[INFO] [stdout] test src/tree.rs - tree::RBTreeSet (line 31) ... ok
[INFO] [stdout] test src/tree.rs - tree::RBTreeSet<T>::get (line 87) ... ok
[INFO] [stdout] test src/tree.rs - tree::RBTreeSet<T>::insert (line 227) ... ok
[INFO] [stdout] test src/tree.rs - tree::RBTreeSet<T>::get_node (line 296) ... ok
[INFO] [stdout] test src/tree.rs - tree::RBTreeSet<T>::dump_tree_as_dot (line 737) ... ok
[INFO] [stdout] test src/tree.rs - tree::RBTreeSet<T>::first (line 469) ... ok
[INFO] [stdout] test src/tree.rs - tree::RBTreeSet<T>::is_empty (line 525) ... ok
[INFO] [stdout] test src/tree.rs - tree::RBTreeSet<T>::len (line 509) ... ok
[INFO] [stdout] test src/tree.rs - tree::RBTreeSet<T>::iter_from (line 563) ... ok
[INFO] [stdout] test src/tree.rs - tree::RBTreeSet<T>::remove_node (line 395) ... ok
[INFO] [stdout] test src/tree.rs - tree::RBTreeSet<T>::last (line 489) ... ok
[INFO] [stdout] test src/tree.rs - tree::RBTreeSet<T>::iter (line 541) ... ok
[INFO] [stdout] test src/tree.rs - tree::RBTreeSet<T>::remove (line 253) ... ok
[INFO] [stdout] test src/tree.rs - tree::RBTreeSet<T>::repack (line 647) ... ok
[INFO] [stdout] test src/tree.rs - tree::RBTreeSet<T>::values (line 590) ... ok
[INFO] [stdout] test src/tree.rs - tree::RBTreeSet<T>::values_from (line 619) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 18 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "fb6d57e1e6a0e8b25216206618b63fda143bb74de185371684015d0a176aa65e"`
[INFO] running `"docker" "rm" "-f" "fb6d57e1e6a0e8b25216206618b63fda143bb74de185371684015d0a176aa65e"`
[INFO] [stdout] fb6d57e1e6a0e8b25216206618b63fda143bb74de185371684015d0a176aa65e