Corrupt or hand-written metadata can contain a property with no
MethodSemantics rows at all. MetadataTypeDefinition.Properties already
skips properties with neither a visible getter nor setter, so neither
the parameterized-property path nor the ordinary one ever sees them;
the accessor-method emission also tolerates a missing accessor by
construction. Pin that with an ILPretty case containing both a
parameterized and an ordinary accessor-less property.
Assisted-by: Claude:claude-fable-5:Claude Code
Siegfried Pammer