Merge pull request #29011 from LucianoPAlmeida/coercion-handle-contextual-mismatch

[Diagnostics] Handle CoerceExpr conversion failure in contextual mismatch

lib/Sema/CSSimplify.cpp

@@ -2823,6 +2823,15 @@ bool ConstraintSystem::repairFailures(
         conversionsOrFixes.push_back(coerceToCheckCastFix);
         return true;
       }
+      
+      // If it has a deep equality restriction, defer the diagnostic to
+      // GenericMismatch.
+      if (hasConversionOrRestriction(ConversionRestrictionKind::DeepEquality))
+        return false;
+      
+      auto *fix = ContextualMismatch::create(*this, lhs, rhs,
+                                             getConstraintLocator(locator));
+      conversionsOrFixes.push_back(fix);
     }
 
     // This could be: