8218280: LineNumberReader throws "Mark invalid" exception if CRLF straddles buffer.

[Brian Burkhalter]

Daniel,

I modified the test as shown below. It passes both before and after the implementation change.

Thanks,

Brian

--- a/test/jdk/java/io/LineNumberReader/MarkSplitCRLF.java
+++ b/test/jdk/java/io/LineNumberReader/MarkSplitCRLF.java
@@ -56,6 +56,24 @@
     }
 
     @Test
+    public static void testCRNotFollowedByLF() throws IOException {
+        final String string = "foo\rbar";
+        try (Reader reader =
+            new LineNumberReader(new StringReader(string), 5)) {
+            reader.read();  // 'f'
+            reader.read();  // 'o'
+            reader.read();  // 'o'
+            reader.read();  // '\r'
+            reader.mark(1); // mark position of next character 
+            reader.read();  // 'b'
+            reader.reset(); // reset to position after '\n'
+            assertEquals(reader.read(), 'b');
+            assertEquals(reader.read(), 'a');
+            assertEquals(reader.read(), 'r');
+        }
+    }
+
+    @Test

> On Apr 26, 2019, at 4:23 AM, Daniel Fuchs <daniel.fuchs at oracle.com> wrote:
> 
> I had to convince myself that there was no issue when
> '\r' is not followed by '\n' but I couldn't fault  the
> logic.
> 
> I wonder if adding a third test case with '\r' not
> followed by '\n' would be a good idea?