Segmentation fault when @-binding a pattern twice

fn main() {
  println!("{}", match "foo" { a @ b @ _ => b });
}

master:

playpen: application terminated abnormally with signal 11 (Segmentation fault)
Program ended.

0.10, 0.11:

Basic Block in function '_ZN4main20hf48cec12216e2d29eaa4v0.0E' does not have terminator!
label %entry-block
LLVM ERROR: Broken function found, compilation aborted!
playpen: application terminated with error code 1