--- old/src/java.base/share/classes/jdk/internal/org/objectweb/asm/util/CheckSignatureAdapter.java	Fri Oct 27 09:24:55 2017
+++ new/src/java.base/share/classes/jdk/internal/org/objectweb/asm/util/CheckSignatureAdapter.java	Fri Oct 27 09:24:55 2017
@@ -142,7 +142,7 @@
      *            <tt>null</tt>.
      */
     public CheckSignatureAdapter(final int type, final SignatureVisitor sv) {
-        this(Opcodes.ASM5, type, sv);
+        this(Opcodes.ASM6, type, sv);
     }
 
     /**
@@ -150,7 +150,7 @@
      *
      * @param api
      *            the ASM API version implemented by this visitor. Must be one
-     *            of {@link Opcodes#ASM4} or {@link Opcodes#ASM5}.
+     *            of {@link Opcodes#ASM4}, {@link Opcodes#ASM5} or {@link Opcodes#ASM6}.
      * @param type
      *            the type of signature to be checked. See
      *            {@link #CLASS_SIGNATURE}, {@link #METHOD_SIGNATURE} and
@@ -175,7 +175,7 @@
                 || (state != EMPTY && state != FORMAL && state != BOUND)) {
             throw new IllegalStateException();
         }
-        CheckMethodAdapter.checkIdentifier(name, "formal type parameter");
+        checkIdentifier(name, "formal type parameter");
         state = FORMAL;
         if (sv != null) {
             sv.visitFormalTypeParameter(name);
@@ -284,7 +284,7 @@
         if (type != TYPE_SIGNATURE || state != EMPTY) {
             throw new IllegalStateException();
         }
-        CheckMethodAdapter.checkIdentifier(name, "type variable");
+        checkIdentifier(name, "type variable");
         state = SIMPLE_TYPE;
         if (sv != null) {
             sv.visitTypeVariable(name);
@@ -306,7 +306,7 @@
         if (type != TYPE_SIGNATURE || state != EMPTY) {
             throw new IllegalStateException();
         }
-        CheckMethodAdapter.checkInternalName(name, "class name");
+        checkClassName(name, "class name");
         state = CLASS_TYPE;
         if (sv != null) {
             sv.visitClassType(name);
@@ -318,7 +318,7 @@
         if (state != CLASS_TYPE) {
             throw new IllegalStateException();
         }
-        CheckMethodAdapter.checkIdentifier(name, "inner class name");
+        checkIdentifier(name, "inner class name");
         if (sv != null) {
             sv.visitInnerClassType(name);
         }
@@ -356,4 +356,30 @@
             sv.visitEnd();
         }
     }
+
+    private void checkClassName(final String name, final String msg) {
+        if (name == null || name.length() == 0) {
+            throw new IllegalArgumentException("Invalid " + msg
+                    + " (must not be null or empty)");
+        }
+        for (int i = 0; i < name.length(); ++i) {
+            if (".;[<>:".indexOf(name.charAt(i)) != -1) {
+                throw new IllegalArgumentException("Invalid " + msg
+                        + " (must not contain . ; [ < > or :): " + name);
+            }
+        }
+    }
+
+    private void checkIdentifier(final String name, final String msg) {
+        if (name == null || name.length() == 0) {
+            throw new IllegalArgumentException("Invalid " + msg
+                    + " (must not be null or empty)");
+        }
+        for (int i = 0; i < name.length(); ++i) {
+            if (".;[/<>:".indexOf(name.charAt(i)) != -1) {
+                throw new IllegalArgumentException("Invalid " + msg
+                        + " (must not contain . ; [ / < > or :): " + name);
+            }
+        }
+    }
 }