Minor, improve exception message for non-deserialized types

compiler/backend/src/org/jetbrains/kotlin/codegen/state/JetTypeMapper.java

@@ -58,6 +58,7 @@ import org.jetbrains.kotlin.resolve.jvm.JvmPrimitiveType;
 import org.jetbrains.kotlin.resolve.jvm.jvmSignature.JvmMethodParameterKind;
 import org.jetbrains.kotlin.resolve.jvm.jvmSignature.JvmMethodParameterSignature;
 import org.jetbrains.kotlin.resolve.jvm.jvmSignature.JvmMethodSignature;
+import org.jetbrains.kotlin.serialization.deserialization.DeserializedType;
 import org.jetbrains.kotlin.serialization.deserialization.descriptors.DeserializedCallableMemberDescriptor;
 import org.jetbrains.kotlin.types.*;
 import org.jetbrains.kotlin.types.expressions.OperatorConventions;
@@ -436,14 +437,14 @@ public class JetTypeMapper {
         PsiElement declarationElement = DescriptorToSourceUtils.descriptorToDeclaration(descriptor);
 
         if (declarationElement == null) {
-            return String.format(
-                    "Error type encountered: %s (%s). " +
-                    "One of the possible reasons may be that this type is not directly accessible from this module. " +
-                    "To workaround this error, try adding an explicit dependency on the module or library which contains this type " +
-                    "to the classpath",
-                    type,
-                    type.getClass().getSimpleName()
-            );
+            String message = "Error type encountered: %s (%s).";
+            if (TypesPackage.upperIfFlexible(type) instanceof DeserializedType) {
+                message +=
+                        " One of the possible reasons may be that this type is not directly accessible from this module. " +
+                        "To workaround this error, try adding an explicit dependency on the module or library which contains this type " +
+                        "to the classpath";
+            }
+            return String.format(message, type, type.getClass().getSimpleName());
         }
 
         DeclarationDescriptor containingDeclaration = descriptor.getContainingDeclaration();