diff options
| -rw-r--r-- | compiler/rustc_middle/src/mir/traversal.rs | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/compiler/rustc_middle/src/mir/traversal.rs b/compiler/rustc_middle/src/mir/traversal.rs index ab7b3f26d55..b2d0d83240b 100644 --- a/compiler/rustc_middle/src/mir/traversal.rs +++ b/compiler/rustc_middle/src/mir/traversal.rs @@ -192,12 +192,10 @@ impl<'a, 'tcx> Iterator for Postorder<'a, 'tcx> { type Item = (BasicBlock, &'a BasicBlockData<'tcx>); fn next(&mut self) -> Option<(BasicBlock, &'a BasicBlockData<'tcx>)> { - let next = self.visit_stack.pop(); - if next.is_some() { - self.traverse_successor(); - } - - next.map(|(bb, _)| (bb, &self.basic_blocks[bb])) + let (bb, _) = self.visit_stack.pop()?; + self.traverse_successor(); + + Some((bb, &self.basic_blocks[bb])) } fn size_hint(&self) -> (usize, Option<usize>) { |