diff --git a/pmd-java/etc/grammar/Java.jjt b/pmd-java/etc/grammar/Java.jjt
index 7573447fca..d9b55cf20d 100644
--- a/pmd-java/etc/grammar/Java.jjt
+++ b/pmd-java/etc/grammar/Java.jjt
@@ -1794,7 +1794,7 @@ void FormalParameter() :
 }
 {
    ( "final" {jjtThis.setFinal(true);} | Annotation() )*
-   Type() ("|" Type())*
+   Type()
    // TODO there may be annotations before the "..." of the varargs
    //  the ... is treated analogously to a pair of brackets
    //  the sensible way to parse it would probably be to push an ArrayType with ArrayTypeDim for the "..."
@@ -2999,7 +2999,7 @@ void UnionType() #UnionType(isUnion):
   // Annotations of the first class type belong to the
   // catch parameter (the variable) because of syntactic ambiguity
   // This is similar to how a local var type works.
-  ClassOrInterfaceType() ( "|" {isUnion=true; checkForBadMultipleExceptionsCatching();} AnnotatedClassOrInterfaceType() )*
+  ClassOrInterfaceType() ( "|" {isUnion=true;} AnnotatedClassOrInterfaceType() )*
 }
 
 void FinallyClause() :
diff --git a/pmd-java/src/main/java/net/sourceforge/pmd/lang/java/ast/ASTFormalParameter.java b/pmd-java/src/main/java/net/sourceforge/pmd/lang/java/ast/ASTFormalParameter.java
index 4b0bc86474..b7408a1c5a 100644
--- a/pmd-java/src/main/java/net/sourceforge/pmd/lang/java/ast/ASTFormalParameter.java
+++ b/pmd-java/src/main/java/net/sourceforge/pmd/lang/java/ast/ASTFormalParameter.java
@@ -11,16 +11,14 @@ import net.sourceforge.pmd.lang.java.typeresolution.typedefinition.JavaTypeDefin
 /**
  * Formal parameter node. Used in the {@link ASTFormalParameters}
  * production of {@link ASTMethodDeclarator} to represent a
- * method's formal parameter. Also used in the {@link ASTCatchClause}
- * production to represent the declared exception variable.
- * Also used in LambdaExpressions for the LambdaParameters.
+ * method's formal parameter.
  *
  * <pre class="grammar">
  *
- * FormalParameter ::= ( "final" | {@link ASTAnnotation Annotation} )* {@link ASTType Type} ( "|" {@link ASTType Type} )* [ "..." ] {@link ASTVariableDeclaratorId VariableDeclaratorId}
+ * FormalParameter ::= ( "final" | {@link ASTAnnotation Annotation} )* {@link ASTType Type} [ "..." ] {@link ASTVariableDeclaratorId VariableDeclaratorId}
  * </pre>
  */
-public class ASTFormalParameter extends AbstractJavaAccessTypeNode implements Dimensionable {
+public class ASTFormalParameter extends AbstractJavaAccessTypeNode implements Dimensionable, Annotatable {
 
     private boolean isVarargs;
 
@@ -50,12 +48,12 @@ public class ASTFormalParameter extends AbstractJavaAccessTypeNode implements Di
 
     /**
      * If true, this formal parameter represents one without explit types.
-     * This can appear as part of a lambda expression with java11 using "var".
      *
-     * @see ASTVariableDeclaratorId#isTypeInferred()
+     * @deprecated Returns false always, since lambda expressions use {@link ASTLambdaParameter}.
      */
+    @Deprecated
     public boolean isTypeInferred() {
-        return getTypeNode() == null;
+        return false;
     }
 
     @Override
diff --git a/pmd-java/src/main/java/net/sourceforge/pmd/lang/java/symboltable/MethodNameDeclaration.java b/pmd-java/src/main/java/net/sourceforge/pmd/lang/java/symboltable/MethodNameDeclaration.java
index 3f34afe72c..6d9e92d25f 100644
--- a/pmd-java/src/main/java/net/sourceforge/pmd/lang/java/symboltable/MethodNameDeclaration.java
+++ b/pmd-java/src/main/java/net/sourceforge/pmd/lang/java/symboltable/MethodNameDeclaration.java
@@ -120,10 +120,8 @@ public class MethodNameDeclaration extends AbstractNameDeclaration {
         int hash = declaration.getName().hashCode() * 31 + declaration.getArity();
 
         for (ASTFormalParameter myParam : declaration.getFormalParameters()) {
-            if (!myParam.isTypeInferred()) {
-                String myTypeImg = myParam.getTypeNode().getTypeImage();
-                hash = hash * 31 + myTypeImg.hashCode();
-            }
+            String myTypeImg = myParam.getTypeNode().getTypeImage();
+            hash = hash * 31 + myTypeImg.hashCode();
         }
 
         return hash;