[CS] Improve diagnostics for non-metatype type(of:) contextual type
#84699
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hamishknight
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hborla,
slavapestov and
xedin
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xedin
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Oct 6, 2025
Emit a custom diagnostic for this case, and handle holes.
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Noticed this while working on another patch, make sure we emit a diagnostic if we fail to match a
DynamicTypeOfconstraint.