Catch ValueError when calling memoryview() to avoid leaking implementation details (GH-5406)

2 files changed, 27 insertions, 1 deletions

diff --git a/Cython/Compiler/FusedNode.py b/Cython/Compiler/FusedNode.py
index 573530ac8..7876916db 100644
--- a/Cython/Compiler/FusedNode.py
+++ b/Cython/Compiler/FusedNode.py
@@ -511,7 +511,7 @@ class FusedCFuncDefNode(StatListNode):
             """
             try:
                 arg_as_memoryview = memoryview(arg)
-            except TypeError:
+            except (ValueError, TypeError):
                 pass
             """)
         with pyx_code.indenter("else:"):
diff --git a/tests/memoryview/numpy_memoryview.pyx b/tests/memoryview/numpy_memoryview.pyx
index 2af6bfea4..7f98352a6 100644
--- a/tests/memoryview/numpy_memoryview.pyx
+++ b/tests/memoryview/numpy_memoryview.pyx
@@ -734,3 +734,29 @@ def same_type_after_arrays_composite():
     cdef SameTypeAfterArraysStructComposite element
     arr = np.ones(2, np.asarray(<SameTypeAfterArraysStructComposite[:1]>&element).dtype)
     cdef SameTypeAfterArraysStructComposite[:] memview = arr
+
+ctypedef fused np_numeric_t:
+    np.float64_t
+
+def test_invalid_buffer_fused_memoryview(np_numeric_t[:] A):
+    """
+    >>> import numpy as np
+    >>> zz = np.zeros([5], dtype='M')
+    >>> test_invalid_buffer_fused_memoryview(zz)
+    Traceback (most recent call last):
+        ...
+    TypeError: No matching signature found
+    """
+    return
+
+ctypedef fused np_numeric_object_t:
+    np.float64_t[:]
+    object
+
+def test_valid_buffer_fused_memoryview(np_numeric_object_t A):
+    """
+    >>> import numpy as np
+    >>> zz = np.zeros([5], dtype='M')
+    >>> test_valid_buffer_fused_memoryview(zz)
+    """
+    return