extract shape in _view_has_unbacked_input

laithsakka · facebook-github-bot · commit e265e3767ba8 · 2025-08-09T11:11:12.000-07:00
Summary: We were getting DDE on reshape still!! i looked deeper and found an issue in _view_has_unbacked_input namely when input is [[,,]] it need to be normalized to [..]

Test Plan:
existing tests.

Rollback Plan:

Differential Revision: D79951119
diff --git a/torch/_subclasses/fake_impls.py b/torch/_subclasses/fake_impls.py
@@ -513,6 +513,7 @@ def maybe_guard_or_true(x):
 
 def _view_has_unbacked_input(a, shape):
     from torch.fx.experimental.symbolic_shapes import has_hint
+    shape = utils.extract_shape_from_varargs(shape, validate=False)
 
     return (
         any(not has_hint(s) for s in a.size())
