[psi] don't decompile to detect invalid code

in compiled code no error elements are possible

Merge-request: KT-MR-10407
Merged-by: Anna Kozlova <Anna.Kozlova@jetbrains.com>

compiler/psi/src/org/jetbrains/kotlin/psi/KtParameter.java

@@ -154,10 +154,18 @@ public class KtParameter extends KtNamedDeclarationStub<KotlinParameterStub> imp
     private <T extends PsiElement> boolean checkParentOfParentType(Class<T> klass) {
         // `parent` is supposed to be [KtParameterList]
         PsiElement parent = getParent();
-        if (parent == null || parent.getNextSibling() instanceof PsiErrorElement) {
+        if (parent == null) {
             return false;
         }
-        return klass.isInstance(parent.getParent());
+        if (klass.isInstance(parent.getParent())) {
+            //don't check ast if the tree structure is different; skip for compiled code
+            if (!getContainingKtFile().isCompiled() && 
+                parent.getNextSibling() instanceof PsiErrorElement) {
+                return false;
+            }
+            return true;
+        }
+        return false;
     }
 
     public boolean isCatchParameter() {