7080464: langtools regression test failures when assertions are enabled

Reviewed-by: jjg

test/tools/javac/api/TestJavacTaskScanner.java

@@ -179,7 +179,6 @@ class MyScanner extends Scanner {
 
         @Override
         public Scanner newScanner(CharSequence input, boolean keepDocComments) {
-            assert !keepDocComments;
             if (input instanceof CharBuffer) {
                 return new MyScanner(this, (CharBuffer)input, test);
             } else {
@@ -190,7 +189,6 @@ class MyScanner extends Scanner {
 
         @Override
         public Scanner newScanner(char[] input, int inputLength, boolean keepDocComments) {
-            assert !keepDocComments;
             return new MyScanner(this, input, inputLength, test);
         }
 

test/tools/javac/diags/MessageFile.java

@@ -65,7 +65,7 @@ class MessageFile {
         }
 
         void insertAfter(Line l) {
-            assert prev == null && next == null;
+            assert l.prev == null && l.next == null;
             l.prev = this;
             l.next = next;
             if (next == null)
@@ -82,7 +82,7 @@ class MessageFile {
         }
 
         void insertBefore(Line l) {
-            assert prev == null && next == null;
+            assert l.prev == null && l.next == null;
             l.prev = prev;
             l.next = this;
             if (prev == null)

test/tools/javac/diags/MessageInfo.java

@@ -409,5 +409,3 @@ public class MessageInfo {
     }
 
 }
-
-