error[E0502]: cannot borrow `map.root` as mutable because it is also borrowed as immutable
--> /home/philipp/.rustup/toolchains/bisector-ci-1b9daa69640970e7858b7c8e1c9f72c604985e11-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/alloc/src/collections/btree/map.rs:295:25
|
295 | let root_node = map.root.get_or_insert_with(|| Root::new(&*map.alloc)).borrow_mut();
| ^^^^^^^^^------------------^--^^^^^^^^^^^^^---------^^
| | | | |
| | | | first borrow occurs due to use of `map` in closure
| | | immutable borrow occurs here
| | immutable borrow later used by call
| mutable borrow occurs here
error[E0502]: cannot borrow `self.root` as mutable because it is also borrowed as immutable
--> /home/philipp/.rustup/toolchains/bisector-ci-1b9daa69640970e7858b7c8e1c9f72c604985e11-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/alloc/src/collections/btree/map.rs:1112:20
|
1112 | let root = self.root.get_or_insert_with(|| Root::new(&*self.alloc));
| ^^^^^^^^^^------------------^--^^^^^^^^^^^^^----------^^
| | | | |
| | | | first borrow occurs due to use of `self` in closure
| | | immutable borrow occurs here
| | immutable borrow later used by call
| mutable borrow occurs here
The following error occurs:
The
cargo bisect-rustc
tool points to this commit: https://github.com/rust-lang/rust/commit/1b9daa69640970e7858b7c8e1c9f72c604985e11The error does not happen with cargo's own
-Zbuild-std
, so it must depend on the build command somehow.