src/share/classes/com/sun/tools/javac/code/Symtab.java

@@ -146,10 +146,11 @@
     public final Type deprecatedType;
     public final Type suppressWarningsType;
     public final Type inheritedType;
     public final Type proprietaryType;
     public final Type systemType;
+    public final Type autoCloseableType;
 
     /** The symbol representing the length field of an array.
      */
     public final VarSymbol lengthVar;
 

@@ -157,10 +158,13 @@
     public final OperatorSymbol nullcheck;
 
     /** The symbol representing the final finalize method on enums */
     public final MethodSymbol enumFinalFinalize;
 
+    /** The symbol representing the close method on ARM AutoCloseable type */
+    public final MethodSymbol autoCloseableClose;
+
     /** The predefined type that belongs to a tag.
      */
     public final Type[] typeOfTag = new Type[TypeTags.TypeTagCount];
 
     /** The name of the class that belongs to a basix type tag.

@@ -442,10 +446,16 @@
         retentionType = enterClass("java.lang.annotation.Retention");
         deprecatedType = enterClass("java.lang.Deprecated");
         suppressWarningsType = enterClass("java.lang.SuppressWarnings");
         inheritedType = enterClass("java.lang.annotation.Inherited");
         systemType = enterClass("java.lang.System");
+        autoCloseableType = enterClass("java.lang.AutoCloseable");
+        autoCloseableClose = new MethodSymbol(PUBLIC,
+                             names.close,
+                             new MethodType(List.<Type>nil(), voidType,
+                                            List.of(exceptionType), methodClass),
+                             autoCloseableType.tsym);
 
         synthesizeEmptyInterfaceIfMissing(cloneableType);
         synthesizeEmptyInterfaceIfMissing(serializableType);
         synthesizeEmptyInterfaceIfMissing(polymorphicSignatureType);
         synthesizeBoxTypeIfMissing(doubleType);