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Diffstat (limited to 'Lib/compiler/pyassem.py')
| -rw-r--r-- | Lib/compiler/pyassem.py | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/Lib/compiler/pyassem.py b/Lib/compiler/pyassem.py index 5098f2c1ee..be0255d6aa 100644 --- a/Lib/compiler/pyassem.py +++ b/Lib/compiler/pyassem.py @@ -122,6 +122,9 @@ def order_blocks(start_block, exit_block): for b in remaining: if __debug__ and b.next: assert b is b.next[0].prev[0], (b, b.next) + # Make sure every block appears in dominators, even if no + # other block must precede it. + dominators.setdefault(b, set()) # preceeding blocks dominate following blocks for c in b.get_followers(): while 1: |