How to submit rust-specific lldb bug?

When debug rust program (x86_64, ubuntu), lldb crash:

use std::collections::HashMap;

enum En<'a> {
    Bar(&'a Bar<'a>),

struct Bar<'a> {
    next: En<'a>,

fn main() {
    let mut all_objects = HashMap::new();
    let bar: Bar = Bar {
        next: En::None,
    all_objects.insert(1, bar);
    let b1 = all_objects.get(&1).unwrap();
    println!("b1={:?}", b1); //line 22

Try to set breakpoint to line 22 and print b1:

$ lldb target/debug/test
(lldb) target create "target/debug/test"
Current executable set to 'target/debug/test' (x86_64).
(lldb) b 22
Breakpoint 1: 2 locations.
(lldb) r
Process 11600 launched: '/home/chabapok/RustProjects/2/test1/target/debug/test' (x86_64)
Process 11600 stopped
* thread #1, name = 'test', stop reason = breakpoint 1.1
    frame #0: 0x000055555556501f test`test::main at
   19  	    };
   20  	    all_objects.insert(1, bar);
   21  	    let b1 = all_objects.get(&1).unwrap();
-> 22  	    println!("b1={:?}", b1); //line 22
   23  	    println!("end");
   24  	}
(lldb) p b1
error: test DWARF DIE at 0x0000007c (class En) has a member variable 0x00000082 (RUST$ENCODED$ENUM$0$None) whose type is a forward declaration, not a complete definition.
Please file a bug against the compiler and include the preprocessed output for /home/chabapok/RustProjects/2/test1/./src/
Stack dump:
0.	HandleCommand(command = "p b1")
1.	<eof> parser at end of file
2.	Parse:41:1: Generating code for declaration '$__lldb_expr'
Segmentation fault (core dumped)

lldb, clang and llvm compiled from master branch.
As far as I understand, this is only rust-specific bug. How to fix it? Where do I send a bug report? bugtracker of llvm is private.

GitHub - rust-lang/rust: Empowering everyone to build reliable and efficient software. would probably be the right place.